JP5878148B2 - Voice quality measurement system - Google Patents

Description

  The present invention relates to a voice quality measurement system that measures voice quality of communication via a communication network.

  The quality of voice transmitted and received via the communication network is the environmental noise and speech level at the time of utterance, the voice input and voice processing performance of the utterance, the transmission quality, the voice output and voice processing performance of the receiver, It is affected by various factors such as environmental noise and reception level. Conventionally, as a voice quality measurement system that measures the quality of such voice, it connects to a mobile phone as a communication terminal device dedicated to measurement, in which a sound source file for voice quality measurement and an application are pre-installed, and a fixed-line telephone network And a voice quality measurement server in which a sound source file for voice quality measurement is incorporated. In this voice quality measurement system, a dedicated staff member in charge of voice quality measurement operates the mobile phone dedicated to the measurement and calls the server to inform that a voice quality measurement is requested. Upon receiving a request from the mobile phone side, the server generates an audio signal based on the sound source file, and transmits the generated audio signal to the communication terminal device via the fixed telephone communication network and the mobile phone communication network. In the communication terminal device, the audio signal received from the server is recorded and stored as a recording file, and the audio signal of the recording file is compared with the audio signal of the sound source file to measure the audio quality. The measurement result of the voice quality is output as a MOS (Mean Opinion Scores) value standardized in Non-Patent Document 1 and Non-Patent Document 2, for example. This MOS value is a calculated value corresponding to the average value of the scores (see Table 1) of the five-level evaluation by a large number of humans based on the comparison result between the sound to be evaluated and the sound of the reference sound source. Non-Patent Document 1 and Non-Patent Document 2 are international standard systems that mechanically realize the calculation of the MOS value.

  In the above conventional voice quality measurement system, it is necessary to use a dedicated communication terminal device for measurement and a special staff member performs a special operation to call a specific server for voice quality measurement.

  The present invention has been made in view of the above problems, and its purpose is to call a normal voice communication or a voice without requiring a user of the communication terminal device to perform a special operation for voice quality measurement. To provide a voice quality measurement system capable of measuring voice quality during communication.

A voice quality measurement system according to the present invention is a voice quality measurement system for measuring voice quality of voice communication via a communication network, and a sound source file storage means for storing a sound source file of a voice signal for voice quality measurement, An audio signal for transmitting an audio signal of the sound source file from the communication network side to the communication terminal device or from the communication terminal device to the communication network side based on a call of audio communication from the communication terminal device to the audio communication destination A recording means for recording an audio signal received at the communication terminal device or the communication network, a recording file storage means for storing a recording file of the audio signal recorded by the recording means, and a sound source file. Voice quality calculation means for comparing the voice signal with the voice signal of the recording file and calculating a voice quality evaluation value based on the comparison result.
In this voice quality measurement system, when a voice communication call is made from a communication terminal device to a voice communication destination, the voice signal of the sound source file is communicated from the communication network side to the communication terminal device or based on the call. Sent from the terminal device to the communication network side. The transmitted voice signal is received by the communication terminal device or the communication network and recorded by the recording means, and a recording file of the voice signal recorded by the recording means is stored. Then, the audio signal of the sound source file and the audio signal of the recording file are compared, and an evaluation value of the audio quality is calculated based on the comparison result. Accordingly, it is possible to measure the voice quality in the downlink direction or the uplink direction when calling for normal voice communication without requiring the user of the communication terminal apparatus to perform a special operation for measuring the voice quality. In particular, it is possible to perform voice quality measurement in the downlink direction or the uplink direction automatically and without being conscious of the user of voice communication in accordance with a call of normal voice communication.

The voice quality measurement system includes a communication terminal device and a communication network side device capable of communicating with the communication terminal device, wherein the communication terminal device stores a sound source file of a voice signal for voice quality measurement. Storage means, calling means for making a voice communication call to the voice communication destination toward the communication network side apparatus, and a voice signal for receiving a voice signal for voice quality measurement transmitted from the communication network side apparatus A receiving means; a recording means for recording a voice signal received from the communication network side apparatus; a recording file storage means for storing a recording file of the voice signal recorded by the recording means; a voice signal of the sound source file; Voice quality calculation means for comparing a voice signal of a file and calculating a voice quality evaluation value based on the comparison result, the communication network side device for voice quality measurement A sound source file storage means for storing a sound source file of the audio signal, the audio signal transmitting means for transmitting an audio signal for the audio quality measurement to the communication terminal apparatus may be provided.
In this voice quality measurement system, when a voice communication call is made from a communication terminal device to a communication network side device, the voice signal of the sound source file is transmitted from the communication network side device to the communication terminal device based on the call. Sent to. The communication terminal device receives the audio signal received from the communication network side device, stores the recording file, compares the audio signal of the sound source file with the audio signal of the recording file, and determines the audio quality based on the comparison result. Calculate the evaluation value. Therefore, it is possible to measure the voice quality in the downlink direction when calling a normal voice communication from the communication terminal device to the communication network side device without requiring the user of the communication terminal device to perform a special operation for voice quality measurement. can do. In particular, the communication terminal apparatus can automatically perform the voice quality measurement in the downlink direction without being conscious of the user of the voice communication in accordance with the normal voice communication call.
Further, the voice quality measurement system includes a communication terminal device and a communication network side device capable of communicating with the communication terminal device, and the communication terminal device sends a voice to a voice communication destination toward the communication network side device. Calling means for making a communication call, voice signal receiving means for receiving a voice signal for voice quality measurement transmitted from the communication network side apparatus, and recording a voice signal received from the communication network side apparatus Recording means, and recording file transmission means for transmitting a recording file of the audio signal recorded by the recording means to the communication network side device, wherein the communication network side device is a sound source file of an audio signal for measuring voice quality A sound source file storing means for storing the sound signal, a sound signal transmitting means for transmitting the sound signal for measuring the sound quality to the communication terminal apparatus, and a sound signal transmitted from the communication terminal apparatus. A recording file receiving means for receiving a recording file, a recording file storage means for storing a recording file received from the communication terminal device, a sound signal of the sound source file and a sound signal of the recording file are compared, and the comparison result Voice quality calculation means for calculating a voice quality evaluation value based on
In this voice quality measurement system, when a voice communication call is made from a communication terminal device to a communication network side device, the voice signal of the sound source file is transmitted from the communication network side device to the communication terminal device based on the call. Sent to. The communication terminal apparatus receives and records a voice signal for voice quality measurement transmitted from the communication network side apparatus, and transmits a recording file of the recorded voice signal to the communication network side apparatus. The communication network side apparatus compares the audio signal of the recording file received from the communication terminal apparatus with the audio signal of the sound source file, and calculates an evaluation value of the audio quality based on the comparison result. Therefore, it is possible to measure the voice quality in the downlink direction when calling a normal voice communication from the communication terminal device to the communication network side device without requiring the user of the communication terminal device to perform a special operation for voice quality measurement. can do. In particular, the communication network side apparatus can automatically perform the voice quality measurement in the downlink direction without being conscious of the user of the voice communication in accordance with the normal voice communication call. Further, since the evaluation value of the voice quality is calculated by the communication network side device, the load on the communication terminal device can be reduced.
The voice quality measurement system includes a communication terminal device and a communication network side device capable of communicating with the communication terminal device, and the communication terminal device stores a sound source file of a voice signal for voice quality measurement. A sound source file storage means, a calling means for making a voice communication call to a voice communication destination toward the communication network side apparatus, and a voice signal for voice quality measurement together with the call to the communication terminal apparatus An audio signal transmitting means for transmitting; a recording file receiving means for receiving a recording file recording the audio signal for measuring the audio quality from the communication network side device; an audio signal of the sound source file; and an audio signal of the recording file; Voice quality calculation means for calculating a voice quality evaluation value based on the comparison result, and the communication network side device is transmitted from the communication terminal device. A voice signal receiving means for receiving a voice signal for measuring voice quality, a recording means for recording a voice signal received from the communication terminal apparatus, and a recording file of the voice signal recorded by the recording means in the communication terminal apparatus. Recording file transmission means for transmitting.
In this voice quality measurement system, when a voice communication call is made from the communication terminal device to the communication network side device, the voice signal of the sound source file is transmitted from the communication terminal device to the communication network side device together with the call. Is done. The communication network side device receives and records a voice signal for voice quality measurement transmitted from the communication terminal device, and transmits a recording file of the recorded voice signal to the communication terminal device. The communication terminal apparatus compares the audio signal of the sound source file with the audio signal of the recording file received from the communication network side apparatus, and calculates an evaluation value of the audio quality based on the comparison result. Therefore, the uplink voice quality is measured when a normal voice communication is made from the communication terminal device to the communication network side device without requiring the user of the communication terminal device to perform a special operation for voice quality measurement. can do. In particular, the communication terminal apparatus can automatically perform the voice quality measurement in the uplink direction without being conscious of the voice communication user, in accordance with the normal voice communication call.
The voice quality measurement system includes a communication terminal device and a communication network side device capable of communicating with the communication terminal device, and the communication terminal device stores a sound source file of a voice signal for voice quality measurement. Sound source file storage means, calling means for making a voice communication call to a voice communication destination toward the communication network side apparatus, and the voice signal for measuring the voice quality together with the call to the communication network side apparatus Audio signal transmitting means for transmitting the sound signal, and the communication network side device is a sound source file storing means for storing a sound source file of a sound signal for sound quality measurement, and a voice quality measurement transmitted from the communication terminal device. An audio signal receiving means for receiving an audio signal for recording, a recording means for recording the audio signal received from the communication terminal device, and a recording file of the audio signal recorded by the recording means A recording file storage means for comparing the sound signal of the sound source file and the sound signal of the recording file, and calculating an evaluation value of the sound quality based on the comparison result. .
In this voice quality measurement system, when a voice communication call is made from the communication terminal device to the communication network side device, a voice signal for voice quality measurement is transmitted from the communication terminal device to the communication network side device together with the call. Is done. The communication network side device receives and records a voice signal for voice quality measurement transmitted from the communication terminal device, and stores a recording file of the recorded voice signal. Then, the communication network side device compares the sound signal of the sound source file and the sound signal of the recording file, and calculates an evaluation value of the sound quality based on the comparison result. Therefore, the uplink voice quality is measured at the time of normal voice communication call from the communication terminal apparatus to the service providing apparatus without requiring the user of the communication terminal apparatus to perform a special operation for measuring the voice quality. be able to. In particular, the communication network side device can automatically perform the voice quality measurement in the uplink direction without being conscious of the voice communication user in accordance with the normal voice communication call. Further, since the evaluation value of the voice quality is calculated by the communication network side device, the load on the communication terminal device can be reduced.
Further, in the voice quality measurement system, a call from the communication terminal device to the voice communication destination performed toward the communication network side device is a first call including a telephone number of the communication network side device; A second number including the telephone number of the voice communication destination after receiving the voice signal for voice quality measurement from the communication network side apparatus or after transmitting the voice signal for voice quality measurement to the communication network side apparatus; You may divide into calling and making. In this voice quality measurement system, it is not necessary to place a call from the communication terminal device to the voice communication destination on hold in the communication network side device.
Further, in the voice quality measurement system, a call from the communication terminal device to the voice communication destination that is performed toward the communication network side device includes the telephone number of the communication network side device and the telephone number of the voice communication destination. And when the communication network side device receives a call from the communication terminal device to the voice communication destination, the communication network side device temporarily holds the transfer of the call, and the communication network side device transmits the voice to the communication terminal device. After detecting the end of transmission of a voice signal for quality measurement or after detecting the end of transmission of the voice signal for measuring voice quality from the communication terminal device to the communication network side device, the voice communication from the communication terminal device The transfer of the outgoing call may be started. In this voice quality measurement system, only one call of voice communication from the communication terminal device to the communication network side is required.

The voice quality measurement system further includes a communication terminal device and an exchange, and the communication terminal device stores a sound source file of a ringing tone that can be used as a voice signal for voice quality measurement, Calling means for making a voice communication call to the voice communication destination toward the switch; and ringing sound receiving means for receiving a ringing tone signal transmitted from the switch based on the call to the voice communication destination; Recording means for recording the ringing tone received from the exchange, recording file storage means for storing a recording file of the ringing sound recorded by the recording means, a ringing tone for the sound source file, and a ringing tone for the recording file. Voice quality calculation means for comparing and calculating a voice quality evaluation value based on the comparison result, Call receiving means for receiving a call to the voice communication destination; and ringing sound transmitting means for transmitting the ringing tone signal to the communication terminal device based on the call to the voice communication destination. Good. In this voice quality measurement system, it is possible to measure the voice quality in the downlink direction by diverting the ringing tone transmitted from the exchange to the communication terminal device at the time of normal call to the voice communication destination. In addition, during a normal call that the communication terminal device is calling to the voice communication destination, a ringing tone signal that can be used for voice quality measurement can be received. There is no need to separately secure time for reception.
Further, in the voice quality measurement system, the voice quality calculation means of the communication terminal apparatus determines whether or not the reception time of the ringing tone signal is equal to or longer than a predetermined time set in advance, and the reception time of the ringing tone signal The voice quality evaluation value may be calculated only when is equal to or longer than a predetermined time. In this voice quality measurement system, it is possible to avoid the calculation of the voice quality evaluation value using the ringing tone signal having an insufficient length, so that the calculation accuracy of the voice quality evaluation value is improved. The set value of the predetermined time compared with the reception time of the ringing tone signal may be changed dynamically.

In the voice quality measurement system, a plurality of types of ringing sounds that can be selected and set for each communication terminal device or each user of the communication terminal device connected to the exchange and stored in the communication terminal device, the exchange, and the exchange are stored. A sound source file storage that stores a sound source file of the ringing tone used as a voice signal for voice quality measurement. Means, a calling means for making a voice communication call to the voice communication destination toward the switch, and a voice signal for receiving a ringing tone signal transmitted from the switch based on the call to the voice communication destination A receiving means; a recording means for recording the ringing tone received from the exchange; and a recording file for the ringing tone recorded by the recording means. Recording sound storage means for storing, sound quality calculation means for comparing the sound of the sound source file and the sound of sound of the recording file, and calculating an evaluation value of sound quality based on the comparison result, and the calculated sound Voice quality transmitting means for transmitting a quality evaluation value to the server.
In this voice quality measurement system, the ringing tone set for the communication terminal device or the user transmitted from the exchange at the time of normal call from the communication terminal device to the voice communication destination is used in the downlink direction. Voice quality can be measured. In addition, during a normal call that a communication terminal device is calling to a voice communication destination, a ringing tone signal that can be used for voice quality measurement can be received, so that a signal used for voice quality measurement is received. There is no need to secure a separate time.
In the voice quality measurement system, a plurality of types of ringing sounds that can be selected and set for each communication terminal device or each user of the communication terminal device connected to the exchange and stored in the communication terminal device, the exchange, and the exchange are stored. A service providing device having a database, and a server for managing voice quality information, wherein the communication terminal device makes a voice communication call to a voice communication destination toward the switch, and the voice Voice signal receiving means for receiving a ring tone signal transmitted from the exchange based on a call to a communication destination, recording means for recording the ring tone received from the exchange, and a recording file recorded by the recording means Recording file transmission means for transmitting to the server, the server being used as an audio signal for measuring audio quality. A sound source file storing means for storing a sound source file of a sound, a recording file receiving means for receiving the recording file from the communication terminal apparatus, a ringing sound of the sound source file, and a ringing sound of the recording file received from the communication terminal apparatus Voice quality calculation means for calculating an evaluation value of voice quality based on the comparison result, and the exchange includes a call reception means for receiving a call to the voice communication destination, and the voice A call for accessing the service providing apparatus based on a call to a communication destination, searching the database, and transmitting a ringing tone signal set for the communication terminal apparatus or a user thereof to the communication terminal apparatus Sound transmitting means.
In this voice quality measurement system, the ringing tone set for the communication terminal device or the user transmitted from the exchange at the time of normal call from the communication terminal device to the voice communication destination is used in the downlink direction. Voice quality can be measured. In addition, during a normal call that a communication terminal device is calling to a voice communication destination, a ringing tone signal that can be used for voice quality measurement can be received, so that a signal used for voice quality measurement is received. There is no need to secure a separate time. Furthermore, since the voice quality evaluation value is calculated by the server, the load on the communication terminal apparatus can be reduced.
In the voice quality measurement system, the voice quality calculation means determines whether or not the reception time of the ringing tone signal is equal to or longer than a predetermined time, and the reception time of the ringing tone signal is equal to or longer than a predetermined time. In this case, the voice quality evaluation value may be calculated. In this voice quality measurement system, it is possible to avoid the calculation of the voice quality evaluation value using the ringing tone signal having an insufficient length, so that the measurement accuracy of the voice quality evaluation value is improved. The set value of the predetermined time compared with the reception time of the ringing tone signal may be changed dynamically.

Another voice quality measurement system according to the present invention is a voice quality measurement system for measuring voice quality of voice communication over a communication network, and is a communication terminal apparatus and a communication network side apparatus capable of communicating with the communication terminal apparatus The communication network side device recorded a voice signal transmitted from the voice communication destination to the communication terminal device during voice communication between the communication terminal device and the voice communication destination. Audio signal recording file or audio signal recording file created based on audio data transmitted from the audio communication destination to the communication terminal device is stored as an audio signal sound source recording file for audio quality measurement Sound source recording file storage means, and sound source recording file transmission means for transmitting a sound source recording file of the audio signal to the communication terminal device, wherein the communication terminal device A sound source recording file receiving means for receiving a sound source recording file of a signal from the communication network side device; and a recording means for recording a voice signal received from the voice communication destination during voice communication with the voice communication destination; A measurement target recording file storage unit that stores a recording file of the audio signal recorded by the recording unit as a measurement target recording file, and compares the audio signal of the sound source recording file with the audio signal of the measurement target recording file, and compares Voice quality calculation means for calculating a voice quality evaluation value based on the result.
In this voice quality measurement system, a voice signal obtained by recording a voice signal transmitted from a voice communication destination to a communication terminal apparatus by a communication network side device during voice communication between the communication terminal apparatus and the voice communication destination. Or a sound signal recording file created based on the sound data transmitted from the voice communication destination to the communication terminal device is stored as a sound source recording file of a sound signal for sound quality measurement. The sound source recording file of the signal is transmitted to the communication terminal device. During the voice communication with the voice communication destination, the communication terminal device records the voice signal received from the voice communication destination and stores it as a measurement target recording file, and the voice signal of the sound source recording file and the communication network side device The received audio signal of the recording file to be measured is compared, and an evaluation value of the audio quality is calculated based on the comparison result. Therefore, the communication terminal apparatus can measure the downlink voice quality during normal voice communication without requiring the user of the communication terminal apparatus to perform a special operation for measuring the voice quality. In particular, during normal voice communication, the communication terminal device can automatically perform downlink voice quality measurement without being conscious of the voice communication user.
Still another voice quality measurement system according to the present invention is a voice quality measurement system for measuring voice quality of voice communication via a communication network, and a communication terminal apparatus and a communication capable of communicating with the communication terminal apparatus. A network side device, wherein the communication terminal device is configured to record a voice signal received from the voice communication destination during voice communication with the voice communication destination, and a recording file recorded by the recording means. Measurement target recording file transmission means for transmitting to the communication network side device as a measurement target recording file, the communication network side device during the voice communication between the communication terminal device and the voice communication destination, Based on a recording file of an audio signal obtained by recording an audio signal transmitted from the audio communication destination to the communication terminal device, or audio data transmitted from the audio communication destination to the communication terminal device. A sound source recording file storage means for creating a recording file of a sound signal created in the above and storing it as a sound source recording file of a sound signal for measuring sound quality; and a measurement target recording file for receiving the measurement target recording file from the communication terminal device Receiving means; and voice quality calculation means for comparing the audio signal of the sound source recording file with the audio signal of the measurement target recording file and calculating an evaluation value of the voice quality based on the comparison result.
In this voice quality measurement system, a communication terminal device records a voice signal received from a voice communication destination during voice communication with a normal voice communication destination, and transmits it to a communication network side device as a measurement target recording file. . The communication network side device is a voice signal recording file in which a voice signal transmitted from the voice communication destination to the communication terminal device is recorded during voice communication between the communication terminal device and the voice communication destination, or the voice A recording file of an audio signal created based on audio data transmitted from the communication destination to the communication terminal device is stored as a sound source recording file of an audio signal for audio quality measurement, and the measurement target recording from the communication terminal device Receive a file. Then, the communication network side apparatus compares the audio signal of the sound source recording file with the audio signal of the measurement target recording file received from the communication terminal apparatus, and calculates an evaluation value of the audio quality based on the comparison result. Therefore, the server can measure the voice quality in the downlink direction during normal voice communication without requiring the user of the communication terminal device to perform a special operation for measuring the voice quality. In particular, during normal voice communication, the communication terminal device can automatically perform downlink voice quality measurement without being conscious of the voice communication user. Further, since the evaluation value of the voice quality is calculated by the communication network side device, the load on the communication terminal device can be reduced.
Still another voice quality measurement system according to the present invention is a voice quality measurement system for measuring voice quality of voice communication via a communication network, and a communication terminal apparatus and a communication capable of communicating with the communication terminal apparatus. An audio signal transmitted from the communication terminal device to the voice communication destination during voice communication between the communication terminal device and the voice communication destination. A voice signal recording file for recording voice quality, or a voice signal recording file created based on voice data transmitted from the voice communication terminal device to the voice communication destination. A measurement target recording file storage means for storing as a target recording file; and a measurement target recording file transmission means for transmitting the measurement target recording file of the audio signal to the communication terminal device. The communication terminal device, during the voice communication between the measurement target recording file receiving means for receiving the measurement signal recording file of the voice signal from the communication network side device and the voice communication destination, Recording means for recording an audio signal to be transmitted, sound source recording file storage means for storing a recording file recorded by the recording means as a sound source recording file, an audio signal of the sound source recording file, and an audio of the measurement target recording file Voice quality calculation means for comparing the signal and calculating an evaluation value of the voice quality based on the comparison result.
In this voice quality measurement system, a voice signal obtained by recording a voice signal transmitted from a communication terminal device to a voice communication destination during communication between the communication terminal device and the voice communication destination by the communication network side device. A recording file of the audio signal created based on the audio data transmitted from the audio communication terminal device to the audio communication destination is stored as an audio signal measurement target recording file for audio quality measurement, The measurement target recording file of the audio signal is transmitted to the communication terminal device. During the voice communication with the voice communication destination, the communication terminal device records and stores the voice signal to be transmitted to the voice communication destination, and the voice signal of the sound source recording file and the voice signal of the measurement target recording file And the evaluation value of the voice quality is calculated based on the comparison result. Therefore, the communication terminal apparatus can measure the uplink voice quality during normal voice communication without requiring the user of the communication terminal apparatus to perform a special operation for measuring the voice quality. In particular, during normal voice communication, the communication terminal apparatus can perform uplink voice quality measurement automatically and without being aware of the voice communication user.
Still another voice quality measurement system according to the present invention is a voice quality measurement system for measuring voice quality of voice communication via a communication network, and a communication terminal apparatus and a communication capable of communicating with the communication terminal apparatus. A network side device, and the communication terminal device, during voice communication with the voice communication destination, recording means for recording a voice signal to be transmitted to the voice communication destination, and recorded by the recording means A sound source recording file transmitting means for transmitting a recording file as a sound source recording file to the communication network side device, and the communication network side device is configured to perform the voice communication between the communication terminal device and a voice communication destination during the voice communication. Based on a recording file of a voice signal obtained by recording a voice signal transmitted from the communication terminal device to the voice communication destination, or voice data transmitted from the communication terminal device to the voice communication destination. Measurement target recording file storage means for storing the created recording file of the audio signal as a measurement target recording file of an audio signal for measuring voice quality, and sound source recording file receiving means for receiving the sound source recording file from the communication terminal device Voice quality calculation means for comparing a voice signal of the sound source recording file with a voice signal of the measurement target recording file and calculating an evaluation value of the voice quality.
In this voice quality measurement system, the communication terminal device records a voice signal to be transmitted to the voice communication destination during voice communication with the voice communication destination, and transmits it to the communication network side device as a sound source recording file. The communication network side device is a voice signal recording file in which a voice signal transmitted from the communication terminal device to the voice communication destination is recorded during voice communication between the communication terminal device and the voice communication destination, or a communication terminal. The audio signal recording file created based on the audio data transmitted from the device to the audio communication destination is stored as the audio signal measurement target recording file for audio quality measurement, and the sound source recording file is stored from the communication terminal device. Receive. Then, the communication network side device compares the sound signal of the sound source recording file and the sound signal of the measurement target recording file, and calculates an evaluation value of the sound quality based on the comparison result. Therefore, the communication network side apparatus can measure the uplink voice quality during normal voice communication without requiring the user of the communication terminal apparatus to perform a special operation for voice quality measurement. In particular, during normal voice communication, the communication terminal apparatus can perform uplink voice quality measurement automatically and without being aware of the voice communication user. Further, since the evaluation value of the voice quality is calculated by the communication network side device, the load on the communication terminal device can be reduced.
In the voice quality measurement system, a condition for specifying a voice quality measurement target in a voice signal transmitted and received by voice communication between the communication terminal device and a voice communication destination is set in advance, and a voice signal satisfying the condition is set. The voice quality evaluation value may be calculated for a range.
In this voice quality measurement system, a voice quality evaluation value can be calculated by accurately extracting ranges corresponding to each other from voice signals transmitted and received by voice communication between a communication terminal device and a voice communication destination. In addition, it is possible to calculate an audio quality evaluation value by extracting an audio signal that satisfies a predetermined condition such as the length and noise level of an audio signal necessary for calculating an audio quality evaluation value. Therefore, the accuracy of the voice quality evaluation value can be further increased.

The voice quality measurement system may further include measurement result storage means for storing the calculated voice quality evaluation value. In this audio quality measurement system, an evaluation value of audio quality can be read at an arbitrary timing and used for various purposes.
In the voice quality measurement system, the measurement result storage means includes the evaluation value of the voice quality, location information at the time of voice quality measurement of the communication terminal device, date / time information, communication carrier information, and the communication terminal device. And at least one piece of communication quality information may be stored in association with each other. This voice quality measurement system enables analysis of voice quality associated with at least one of location information, date / time information, communication carrier information, and communication quality information at the time of voice quality measurement of the communication terminal device.
Further, in the voice quality measurement system, the measurement result storage unit cannot calculate the voice quality evaluation value instead of the voice quality evaluation value when the voice quality evaluation value cannot be calculated. Information to that effect may be stored. This voice quality measurement system can analyze voice quality considering that the voice quality evaluation value could not be calculated.
In the voice quality measurement system, the measurement result storage means includes the voice quality evaluation value, the measurement target recording file used for calculating the voice quality evaluation value or identification information thereof, and the voice quality evaluation. The sound source recording file used for calculating the value or the identification information thereof may be stored in association with each other. In this voice quality measurement system, the reliability of the voice quality evaluation value can be determined based on the sound source recording file used to calculate the voice quality evaluation value.

  ADVANTAGE OF THE INVENTION According to this invention, voice quality can be measured at the time of the call of normal voice communication or during voice communication, without requiring the user of a communication terminal device special operation for voice quality measurement. .

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which shows an example of a principal part structure of the whole communication system containing the audio | voice quality measurement system which concerns on the 1st Embodiment (Embodiment 1) of this invention. FIG. 3 is a sequence diagram illustrating an example of downlink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. FIG. 7 is a sequence diagram showing another example of downlink voice quality measurement performed at the time of a call from a communication terminal device in the voice quality measurement system according to the first embodiment. FIG. 6 is a sequence diagram showing still another example of downlink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. FIG. 6 is a sequence diagram showing still another example of downlink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. FIG. 3 is a sequence diagram illustrating an example of uplink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. FIG. 6 is a sequence diagram showing another example of uplink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. FIG. 6 is a sequence diagram showing still another example of uplink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. FIG. 6 is a sequence diagram showing still another example of uplink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. Explanatory drawing which shows an example of a principal part structure of the whole communication system containing the audio | voice quality measurement system which concerns on the 2nd Embodiment (Embodiment 2) of this invention. FIG. 9 is a sequence diagram illustrating an example of a downlink voice quality measurement process performed when a voice communication is originated from a communication terminal device in the voice quality measurement system according to the second embodiment. The flowchart which shows an example of the calculation procedure of the MOS value performed with the communication terminal device of a transmission side in the audio | voice quality measurement process of FIG. 12 is a flowchart showing another example of a MOS value calculation procedure executed by the communication terminal device on the calling side in the voice quality measurement process of FIG. Explanatory drawing which shows an example of a principal part structure of the whole communication system containing the audio | voice quality measurement system which concerns on the 3rd Embodiment (Embodiment 3) of this invention. FIG. 10 is a sequence diagram illustrating an example of a downlink voice quality measurement process performed when a voice communication is originated from a communication terminal device in the voice quality measurement system according to the third embodiment. FIG. 10 is a sequence diagram illustrating another example of a downlink voice quality measurement process performed when a voice communication is originated from a communication terminal apparatus in the voice quality measurement system according to the third embodiment. Explanatory drawing which shows an example of a principal part structure of the whole communication system containing the audio | voice quality measurement system which concerns on the 4th Embodiment (Embodiment 4) of this invention. FIG. 10 is a sequence diagram illustrating an example of a downlink voice quality measurement process performed during voice communication of a communication terminal device in the voice quality measurement system according to the fourth embodiment. FIG. 10 is a sequence diagram illustrating another example of a downlink voice quality measurement process performed during voice communication of a communication terminal device in the voice quality measurement system according to the fourth embodiment. FIG. 10 is a sequence diagram illustrating an example of uplink voice quality measurement processing performed during voice communication of a communication terminal device in the voice quality measurement system according to the fourth embodiment. FIG. 10 is a sequence diagram illustrating another example of uplink voice quality measurement processing performed during voice communication of a communication terminal device in the voice quality measurement system according to the fourth embodiment. FIG. 14 is a sequence diagram showing still another example of a downlink voice quality measurement process performed during voice communication of a communication terminal apparatus in the voice quality measurement system of the fourth embodiment. FIG. 14 is a sequence diagram showing still another example of a downlink voice quality measurement process performed during voice communication of a communication terminal apparatus in the voice quality measurement system of the fourth embodiment. FIG. 15 is a sequence diagram showing still another example of uplink voice quality measurement processing performed during voice communication of a communication terminal device in the voice quality measurement system of the fourth embodiment. FIG. 15 is a sequence diagram showing still another example of uplink voice quality measurement processing performed during voice communication of a communication terminal device in the voice quality measurement system of the fourth embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1
FIG. 1 is an explanatory diagram showing an example of a main configuration of the entire communication system including a voice quality measurement system according to a first embodiment (hereinafter referred to as “embodiment 1”) of the present invention. The voice quality measurement system of the first embodiment includes a communication terminal device 100 and a communication network side device 300 for providing an additional service for voice communication by the communication terminal device 100. The communication network side device 300 in this embodiment can communicate with the communication terminal device 100 via the communication network 200.

  The communication terminal device 100 is, for example, a mobile communication terminal such as a mobile phone, a smartphone, or a PHS capable of performing voice communication, or a tablet PC, and via a mobile communication network 200 having an exchange 210 or a base station as a wireless relay device (not shown). Voice communication and data communication can be performed with the communication destination. For example, when the communication terminal apparatus 100 is located in a cell as a wireless communication area of the mobile communication network 200, the communication terminal apparatus 100 serves as a connected voice communication destination located in a cell of another mobile communication network 500. Voice communication can be performed with a mobile communication terminal such as a mobile phone, a smartphone, or a PHS, or with a communication terminal device 900 such as a tablet PC. Further, when the communication terminal device 100 is located in a cell of the mobile communication network 200, the communication terminal device 100 performs voice communication with a communication terminal device such as a fixed telephone 910 as a voice communication destination via another fixed communication network 600. can do. The cell is any one of various cells such as a macro cell, a micro cell, a femto cell, and a pico cell having different sizes.

  The communication network side device 300 includes an intelligent exchange 310 and a server 320, and is a service providing device that provides an additional service for voice communication by the communication terminal device 100. The communication network side device 300, for example, when the call is made from the calling communication terminal device 100 to a foreign or domestic voice communication destination, the call target is set as a condition for executing processing for voice quality measurement in the background. A free call service that frees voice communication with other voice communication destinations.

  The intelligent exchange 310 is a device that can realize functions such as a free telephone service by a processing node in an intelligent network (IN) and a copy / recording of passing voice data based on an existing exchange. Here, the “intelligent network” is a network in which a computer called a processing node is installed in the network, and an advanced (intelligent) communication service can be provided by using a database and a processing function in the processing node. All the existing exchanges are controlled by software, and the processors are connected by a common line signal network, but the processing nodes are also connected to the processors of the exchange by the common line signal network. Software for high-level service control is transferred from each processor to a processing node and modularized for each function, so that new services can be introduced and operated efficiently. A typical example of a service by an intelligent network (IN) is toll-free. By converting the toll-free number into a normal telephone number at the processing node and returning it to the exchange, the exchange can connect the line as usual.

  The server 320 is configured to be communicable with each of the intelligent exchange 310 and the communication terminal device 100, and is a server that performs various processes related to voice quality measurement. For example, the server 320 stores and manages a sound source file of a voice signal for voice quality measurement, information on a voice quality measurement result, and transmits / receives a voice signal for voice quality measurement to / from the communication terminal device 100. Or calculate a MOS value (see Non-Patent Documents 1 and 2) as an evaluation value of voice quality.

  The communication terminal device 100 includes, for example, an antenna, a transmission amplifier, a reception amplifier, a radio signal processing unit, a baseband signal processing unit, an application execution management unit, a voice input device including a small microphone, a speaker, a receiver, a vibration generator, and the like. A voice output device, a display unit such as an LCD, and a main control device. Moreover, the communication terminal device 100 includes a GPS receiving unit that acquires information on its current position using GPS as current position acquisition means. Further, the communication terminal apparatus 100 may include an imaging unit made up of a camera device such as a CCD or CMOS, and an attitude detection unit made up of a gyro sensor, an acceleration sensor, a magnetic sensor, or the like.

  The main control device is constituted by a microprocessor such as an MPU (Micro Processing Unit), or a memory such as a RAM or a ROM, and controls each unit based on a predetermined control program incorporated in advance. For example, the main control device executes processing and control of voice communication with the intelligent exchange 310 and other communication terminal devices 900 and 910 via the mobile communication network 200 and mobile communication by executing a predetermined control program. It is possible to perform transmission / reception processing and control of voice signals for voice quality measurement and voice quality evaluation values with the server 320 via the network 200, calculation processing of voice quality evaluation values, and the like.

  Further, the communication terminal device 100 can execute various application programs in the native environment of the main control device, and can execute various application programs in a virtual environment constructed by the application execution management unit. Here, “application” can be applied to various applications such as browser, telephone, camera, search, mail, information distribution, calendar, clock, music playback, map display, data folder, message communication, video playback, etc. It means software that can be called and is also called "application software". An “application” is a collection of files of an execution program developed in various languages, files of setting information and images used or referred to when the program is executed, and the like.

  The application execution management unit manages, for example, program modules and libraries used for executing applications. In addition, the application execution management unit executes one or more of a plurality of types of applications such as an Android (registered trademark) application, an iOS (registered trademark) application, a Windows (registered trademark) application, and a Java (registered trademark) application. A virtual execution environment (virtual machine) such as a framework for execution (for example, Android framework, iOS framework, etc.), Dalvik (registered trademark) VM, Java VM, or the like is constructed. In addition, the application execution management unit is configured to have a multitask function capable of executing a plurality of applications in parallel.

  The intelligent exchange 310 is configured using, for example, a computer device having an MPU, a memory, and the like, and hardware such as an external communication interface unit, and performs various processes for providing a free call service by executing a predetermined program. It can be carried out.

  The server 320 is configured using, for example, hardware such as a computer device having an MPU or a memory, an external communication interface unit, and the like, and can perform various processes for voice quality measurement by executing a predetermined program. it can.

In an example of the voice quality measurement of the first embodiment, the main control device of the communication terminal apparatus 100 is a recording means for recording a voice signal received from the communication network side apparatus 300, a recording file storage means for storing a recorded recording file, and a sound source. A sound quality calculation means for comparing a sound signal of a file and a sound signal of a recording file and calculating an evaluation value of sound quality based on the comparison result, and a sound source for storing a sound source file of the sound signal for sound quality measurement It also functions as each means of the file storage means.
Further, the main control device, antenna, transmission amplifier, reception amplifier, radio signal processing unit, baseband signal processing unit, etc. of the communication terminal device 100 make a voice communication call to the voice communication destination toward the communication network side device 300. Calling means to perform, voice signal receiving means for receiving a voice signal for voice quality measurement transmitted from the communication network side apparatus 300, and recording file for transmitting a recording file of the recorded voice signal to the communication network side apparatus 300 It also functions as each means of the transmission means.
In addition, the computer apparatus and the external communication interface unit of the intelligent exchange 310, when receiving a call from the communication terminal apparatus 100, a measurement command transmission unit that transmits a command for instructing measurement of voice quality to the server 320, and the server It also functions as each means of an audio signal transfer means for transferring the audio quality measurement audio signal transmitted from 320 to the communication terminal apparatus 100.
In addition, the computer device and the external communication interface unit of the server 320 are a sound source file storage unit that stores a sound source file of a sound signal for sound quality measurement, and a measurement command reception that receives a command instructing measurement of sound quality from the intelligent exchange 310. A voice signal transmitting means for sending a voice signal for voice quality measurement to the communication terminal apparatus 100 based on a command received from the intelligent switch 310; a recording file of the voice signal transmitted from the communication terminal apparatus 100; Recording file receiving means for receiving, recording file storage means for storing the recording file received from the communication terminal device 100, and comparing the sound signal of the sound source file with the sound signal of the recording file, and based on the comparison result, the sound quality As a voice quality calculation means to calculate the evaluation value of Also functions.

In another example of the voice quality measurement according to the first embodiment, the main control device of the communication terminal apparatus 100 includes a sound source file storage unit that stores a sound source file of a voice signal for voice quality measurement, and a sound signal and a sound recording of the sound source file. It also functions as a voice quality calculation unit that compares a voice signal of a file and calculates a voice quality evaluation value based on the comparison result. Further, the main control device, antenna, transmission amplifier, reception amplifier, radio signal processing unit, baseband signal processing unit, etc. of the communication terminal device 100 make a voice communication call to the voice communication destination toward the communication network side device 300. It also functions as each means of a calling means for performing and a voice signal transmitting means for transmitting a voice signal for voice quality measurement to the server 320 together with the call.
In addition, the computer device of the intelligent exchange 310 has a voice signal transfer means for transferring a voice signal for voice quality measurement transmitted from the communication terminal device 100 to the server 320 and a recording of the voice signal transmitted from the server 320. It also functions as a recording file transmission means for transmitting a file to the communication terminal apparatus 100.
The computer device of the server 320 includes a sound source file storage unit that stores a sound source file of a sound signal for measuring sound quality, and a sound signal receiving unit that receives a sound signal for measuring sound quality transmitted from the communication terminal device 100. A recording means for recording the audio signal received from the communication terminal apparatus 100; a recording file storage means for storing the recorded recording file; a recording file transmission means for transmitting the recording file of the audio signal to the communication terminal apparatus 100; The voice signal of the recorded file is compared with the voice signal of the recording file, and it also functions as each means of the voice quality calculation means for calculating the evaluation value of the voice quality based on the comparison result.

  FIG. 2 is a sequence diagram illustrating an example of downlink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. In this example, the originating communication terminal apparatus 100 calculates a MOS value indicating voice quality. In addition, the same sound source file as the sound signal file of the sound signal for sound quality measurement stored in the server 320 is also stored in the communication terminal device 100 on the outgoing side. The communication terminal device 100 on the calling side is preinstalled with an application for using the free call service and performing voice quality measurement via the intelligent exchange 310 described above.

  In FIG. 2, the calling communication terminal apparatus 100 has a voice communication destination telephone number (for example, the telephone number of the communication terminal apparatus 900 in FIG. 1: 090 ******) in a state where the application is activated. **) is started, measurement of a MOS value indicating voice quality (hereinafter referred to as “MOS measurement”) is started, and the telephone number (for example, 03) of the intelligent exchange 310 is started. Calls to (*****). In this example, the call from the communication terminal device 100 to the intelligent exchange 310 does not include the telephone number of the voice communication destination.

  When the intelligent exchange 310 receives a call from the communication terminal apparatus 100, the intelligent exchange 310 transmits a MOS measurement command for instructing measurement of voice quality to the server 320. When the server 320 receives the MOS measurement command from the intelligent exchange 310, the server 320 starts to reproduce the voice signal for measuring the voice quality (hereinafter referred to as the “voice signal for MOS measurement”) based on the sound source file for measuring the voice quality. To do. The MOS measurement audio signal is transmitted to the communication terminal device 100 via the intelligent exchange 310 or without the intelligent exchange 310.

  The communication terminal device 100 records the MOS measurement audio signal received from the server 320 and stores it as a recording file. When reception of the MOS measurement audio signal is completed, communication terminal apparatus 100 compares the audio signal of the sound source file and the audio signal of the recording file, and calculates a MOS value as an evaluation value of the audio quality based on the comparison result. And save.

  When the MOS measurement is completed, the communication terminal apparatus 100 makes a call to the telephone number of the voice communication destination (for example, the telephone number of the communication terminal apparatus 900 in FIG. 1: 090 ******). For example, information necessary for free charge processing is transmitted from the intelligent exchange 310 to a predetermined server of the communication carrier so that the charge for voice communication associated with the call is charged free of charge. In addition, information indicating that a call from the communication terminal apparatus 100 to the telephone number of the voice communication destination is a target of a free call service may be added to the call.

  When the communication terminal device on the voice communication destination side receives a call from the communication terminal device 100, a voice communication line is established between the two devices, and the user of the communication terminal device 100 and the user of the voice communication destination are connected. Normal calls can be made between the two.

Communication terminal apparatus 100 may transmit the calculated MOS value to server 320 together with the measurement environment information. The communication terminal device 100 and the server 320 may store the MOS value and the measurement environment information in association with each other. Here, the measurement environment information includes, for example, position information (GPS position information) of the communication terminal apparatus 100 at the time of voice quality measurement, date / time information at the time of voice quality measurement, communication carrier information of the mobile communication network 200, and communication terminal apparatus. 100, at least one piece of communication quality information (for example, received SINR (Signal-to-Interference and Noise power Ratio)).
In addition, when the MOS value cannot be calculated, the communication terminal device 100 and the server 320 may store information indicating that the MOS value cannot be calculated instead of the MOS value.
Further, the MOS value, the recording file used for calculating the MOS value or identification information thereof, and the sound source file used for calculating the MOS value or identification information thereof may be stored in association with each other.

As described above, according to the example of FIG. 2, when the voice communication of the free call service from the communication terminal device 100 to the communication network side device 300 is originated, the communication terminal device 100 performs the communication terminal device prior to the start of the normal call. The voice quality in the uplink direction from 100 to the mobile communication network 200 side can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality.
In particular, according to the example of FIG. 2, it is not necessary to place a call from the communication terminal apparatus 100 to the voice communication destination on hold in the intelligent exchange 310 of the communication network side apparatus 300.

  FIG. 3 is a sequence diagram illustrating another example of downlink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. In the example of FIG. 3, the intelligent exchange 310 puts the transfer of the call from the communication terminal device 100 on hold, and after the reproduction of the MOS measurement voice signal in the server 320 is completed, the call to the voice communication destination is transferred. ing. In FIG. 3, the description of the same parts as those in FIG. 2 is omitted.

  In FIG. 3, upon receiving a call from the communication terminal apparatus 100 to the voice communication destination, the intelligent exchange 310 temporarily holds the transfer of the call and transmits a MOS measurement command for instructing voice quality measurement to the server 320. To do. The call from the communication terminal device 100 to the intelligent exchange 310 includes the telephone number of the voice communication destination.

  When the server 320 finishes reproducing the MOS measurement audio signal, the server 320 transmits the MOS measurement end information to the intelligent exchange 310. When intelligent switch 310 detects the end of the reproduction of the MOS measurement voice signal in server 320 based on the MOS measurement end information received from server 320, intelligent switch 310 transfers the call placed on hold to the voice communication destination. . When the call from the communication terminal device 100 transferred in this way is received by the communication terminal device on the voice communication destination side, a voice communication line is established between the two devices, and voice communication with the user of the communication terminal device 100 is established. A normal call with a previous user becomes possible.

As described above, according to the example of FIG. 3, when the voice communication of the free call service from the communication terminal device 100 to the communication network side device 300 is originated, the communication terminal device 100 performs the communication terminal device prior to the start of the normal call. The voice quality in the uplink direction from 100 to the mobile communication network 200 side can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality.
In particular, according to the example of FIG. 3, only one call of voice communication from the communication terminal device 100 toward the communication network is required.

  FIG. 4 is a sequence diagram illustrating still another example of downlink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. In the example of FIG. 4, the MOS value calculation process is performed on the server 320 side. In FIG. 4, the description of the parts common to those in FIGS.

  In FIG. 4, the communication terminal apparatus 100 records the MOS measurement audio signal received from the server 320, and transmits the recorded file to the server 320 together with the measurement environment information. The server 320 stores the recording file received from the communication terminal device 100 and the measurement environment information in association with each other. Then, the server 320 compares the sound signal of the sound source file and the sound signal of the recording file, calculates a MOS value as an evaluation value of the sound quality based on the comparison result, and sets the MOS value and the measurement environment information to each other. Associate and save.

  The communication terminal device 100 sends a recording file to the server 320 and, when the MOS measurement is completed, makes a call to the telephone number of the voice communication destination.

  As described above, according to the example of FIG. 4, when the voice communication of the free call service from the communication terminal device 100 to the communication network side device 300 is originated, the server 320 starts from the communication terminal device 100 before starting the normal call. The voice quality in the uplink direction toward the mobile communication network 200 can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality. In addition, since the calculation processing of the MOS value as the voice quality evaluation value is performed by the server 320 of the communication network side device, the processing load on the communication terminal device side can be reduced.

  FIG. 5 is a sequence diagram illustrating still another example of downlink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. In the example of FIG. 5, the MOS value calculation process is performed on the server 320 side. In FIG. 5, the description of the same parts as those in FIGS.

  In FIG. 5, upon receiving a call from the communication terminal apparatus 100 to the voice communication destination, the intelligent exchange 310 temporarily holds the transfer of the call and transmits a MOS measurement command for instructing voice quality measurement to the server 320. To do. The call from the communication terminal device 100 to the intelligent exchange 310 includes the telephone number of the voice communication destination.

  In FIG. 5, the communication terminal apparatus 100 records the MOS measurement audio signal received from the server 320, and transmits the recorded file to the server 320 together with the measurement environment information. The server 320 stores the recording file received from the communication terminal device 100 and the measurement environment information in association with each other. Then, the server 320 compares the sound signal of the sound source file and the sound signal of the recording file, calculates a MOS value as an evaluation value of the sound quality based on the comparison result, and sets the MOS value and the measurement environment information to each other. Associate and save.

  When the server 320 finishes reproducing the MOS measurement audio signal, the server 320 transmits the MOS measurement end information to the intelligent exchange 310. When intelligent switch 310 detects the end of the reproduction of the MOS measurement voice signal in server 320 based on the MOS measurement end information received from server 320, intelligent switch 310 transfers the call placed on hold to the voice communication destination. . When the call from the communication terminal device 100 transferred in this way is received by the communication terminal device on the voice communication destination side, a voice communication line is established between the two devices, and voice communication with the user of the communication terminal device 100 is established. A normal call with a previous user becomes possible.

  As described above, according to the example of FIG. 5, when the voice communication of the free call service from the communication terminal device 100 to the communication network side device 300 is originated, the server 320 starts from the communication terminal device 100 before starting the normal call. The voice quality in the uplink direction toward the mobile communication network 200 can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality. In addition, since the calculation processing of the MOS value as the voice quality evaluation value is performed by the server 320 of the communication network side device, the processing load on the communication terminal device side can be reduced.

  FIG. 6 is a sequence diagram illustrating an example of uplink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. The example of FIG. 6 is an example of measuring the voice quality in the downlink direction from the mobile communication network 200 to the communication terminal apparatus 100 side. In the example of FIG. 6, the MOS value calculation process is performed on the server 320 side. In FIG. 6, the description of the same parts as those in FIG. 2 is omitted.

  In FIG. 6, the originating communication terminal apparatus 100 starts MOS measurement and makes a call to the telephone number of the intelligent exchange 310, and then reproduces the MOS measurement voice signal based on the voice quality measurement sound source file. Start. The voice signal for MOS measurement is transmitted to the server 320 through the intelligent switch 310 or without the intelligent switch 310.

  Based on the MOS measurement command received from the intelligent exchange 310, the server 320 records the MOS measurement voice signal received from the communication terminal apparatus 100 and stores it as a recording file. When the reception of the MOS measurement audio signal is completed, the server 320 compares the audio signal of the sound source file and the audio signal of the recording file, and calculates a MOS value as an evaluation value of the audio quality based on the comparison result. save.

The communication terminal device 100 may transmit the measurement environment information to the server 320. Further, the server 320 may store the MOS value and the measurement environment information in association with each other.
Further, if the MOS value cannot be calculated, the server 320 may store information indicating that the MOS value could not be calculated instead of the MOS value.
Further, the MOS value, the recording file used for calculating the MOS value or identification information thereof, and the sound source file used for calculating the MOS value or identification information thereof may be stored in association with each other.

  As described above, according to the example of FIG. 6, when the voice communication of the free call service from the communication terminal device 100 to the communication network side device 300 is originated, the server 320 starts from the communication network 200 side prior to the start of the normal call. The voice quality in the downlink direction to the communication terminal apparatus 100 can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality.

  FIG. 7 is a sequence diagram illustrating another example of uplink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. The example of FIG. 7 is an example of measuring the voice quality in the downlink direction from the mobile communication network 200 to the communication terminal device 100 side. In the example of FIG. 7, the MOS value calculation process is performed on the server 320 side. In FIG. 6, the description of the same parts as those in FIGS. 2 and 3 is omitted.

  In FIG. 7, the communication terminal apparatus 100 on the calling side starts MOS measurement, calls the telephone number of the intelligent exchange 310, and then reproduces the sound signal for MOS measurement based on the sound source file for sound quality measurement. Start. The voice signal for MOS measurement is transmitted to the server 320 through the intelligent switch 310 or without the intelligent switch 310.

  Based on the MOS measurement command received from the intelligent exchange 310, the server 320 records the MOS measurement voice signal received from the communication terminal apparatus 100 and stores it as a recording file. When the reception of the MOS measurement audio signal is completed, the server 320 compares the audio signal of the sound source file and the audio signal of the recording file, and calculates a MOS value as an evaluation value of the audio quality based on the comparison result. save.

The communication terminal device 100 may transmit the measurement environment information to the server 320. Further, the server 320 may store the MOS value and the measurement environment information in association with each other.
Further, if the MOS value cannot be calculated, the server 320 may store information indicating that the MOS value could not be calculated instead of the MOS value.
Further, the MOS value, the recording file used for calculating the MOS value or identification information thereof, and the sound source file used for calculating the MOS value or identification information thereof may be stored in association with each other.

  When the reproduction of the MOS measurement audio signal in the communication terminal apparatus 100 is completed, the server 320 transmits information on the completion of the MOS measurement to the intelligent exchange 310. When intelligent switch 310 detects the end of the reproduction of the MOS measurement voice signal in communication terminal apparatus 100 based on the MOS measurement end information received from server 320, intelligent switch 310 sends the call that has been put on hold to the voice communication destination. Forward.

  As described above, according to the example of FIG. 7, when the voice communication of the free call service from the communication terminal device 100 to the communication network side device 300 is called, the server 320 starts from the communication network 200 side before the start of the normal call. The voice quality in the downlink direction to the communication terminal apparatus 100 can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality.

  FIG. 8 is a sequence diagram showing still another example of voice quality measurement in the sound up direction performed when a call is made from the communication terminal apparatus in the voice quality measurement system according to the first embodiment. In the example of FIG. 8, the MOS value calculation process is performed on the server 320 side. In FIG. 8, the description of the same parts as those in the above-described FIGS.

  In FIG. 8, the server 320 records the MOS measurement audio signal received from the communication terminal device 100 and stores the recording file. Here, the server 320 may receive the measurement environment information from the communication terminal device 100 and store the measurement environment information and the recording file received from the communication terminal device 100 in association with each other. The server 320 compares the sound signal of the sound source file and the sound signal of the recording file, calculates a MOS value as an evaluation value of the sound quality based on the comparison result, and associates the MOS value with the measurement environment information. save.

  The communication terminal device 100 ends the transmission of the MOS measurement voice signal to the server 320, and when the MOS measurement is completed, calls are made to the telephone number of the voice communication destination.

  As described above, according to the example of FIG. 8, when the voice communication of the free call service from the communication terminal device 100 to the communication network side device 300 is originated, the server 320 starts from the communication terminal device 100 before starting the normal call. The voice quality in the uplink direction toward the mobile communication network 200 can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality. In addition, since the calculation processing of the MOS value as the voice quality evaluation value is performed by the server 320 of the communication network side device, the processing load on the communication terminal device side can be reduced.

  FIG. 9 is a sequence diagram illustrating still another example of uplink voice quality measurement performed when a call is made from a communication terminal apparatus in the voice quality measurement system according to the first embodiment. In the example of FIG. 9, the MOS value calculation process is performed on the server 320 side. In FIG. 9, the description of the same parts as those in the above-described FIGS.

  In FIG. 9, upon receiving a call from the communication terminal apparatus 100 to the voice communication destination, the intelligent exchange 310 temporarily holds the transfer of the call and transmits a MOS measurement command for instructing voice quality measurement to the server 320. To do. The call from the communication terminal device 100 to the intelligent exchange 310 includes the telephone number of the voice communication destination.

  In FIG. 9, the server 320 records the MOS measurement audio signal received from the communication terminal apparatus 100, and stores the recorded file. Here, the server 320 may receive the measurement environment information from the communication terminal device 100 and store the measurement environment information and the recording file received from the communication terminal device 100 in association with each other. The server 320 compares the sound signal of the sound source file and the sound signal of the recording file, calculates a MOS value as an evaluation value of the sound quality based on the comparison result, and stores the calculated MOS value. This MOS value may also be stored in association with the measurement environment information.

  When the server 320 finishes reproducing the MOS measurement audio signal, the server 320 transmits the MOS measurement end information to the intelligent exchange 310. When intelligent switch 310 detects the end of the reproduction of the MOS measurement voice signal in server 320 based on the MOS measurement end information received from server 320, intelligent switch 310 transfers the call placed on hold to the voice communication destination. . When the call from the communication terminal device 100 transferred in this way is received by the communication terminal device on the voice communication destination side, a voice communication line is established between the two devices, and voice communication with the user of the communication terminal device 100 is established. A normal call with a previous user becomes possible.

  As described above, according to the example of FIG. 9, when the voice communication of the free call service from the communication terminal device 100 to the communication network side device 300 is originated, the server 320 starts from the communication terminal device 100 before starting the normal call. The voice quality in the uplink direction toward the mobile communication network 200 can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality. In addition, since the calculation processing of the MOS value as the voice quality evaluation value is performed by the server 320 of the communication network side device, the processing load on the communication terminal device side can be reduced.

[Embodiment 2]
FIG. 10 is an explanatory diagram illustrating an example of a configuration of main parts of the entire communication system including the voice quality measurement system according to the second embodiment (hereinafter referred to as “second embodiment”) of the present invention. The voice quality measurement system according to the second embodiment includes a communication terminal device 100 and an exchange 510 provided in a mobile communication network 500 on the called side. The second embodiment is an example in which voice quality measurement is performed using a ringback tone (hereinafter, abbreviated as “RBT” as appropriate) as a ringing tone received from the exchange 510 on the called side. In FIG. 10, the description of the parts common to the first embodiment shown in FIG. 1 is omitted.

In the second embodiment, the main control device of the communication terminal device 100 includes a sound source file storage unit that stores a sound source file of an RBT that can be used as a sound signal for sound quality measurement, a recording unit that records the RBT received from the exchange 510, Recording file storage means for storing the recorded recording file, and voice quality calculation means for comparing the RBT of the sound source file with the RBT of the recording file and calculating a MOS value as an evaluation value of the voice quality based on the comparison result It also functions as each means.
In addition, the main control device, antenna, transmission amplifier, reception amplifier, radio signal processing unit, baseband signal processing unit, etc. of the communication terminal device 100 make a call for voice communication to the voice communication destination to the exchange 510. Each means also functions as a ring tone receiving means for receiving an RBT signal transmitted from the exchange 510 based on a call to a voice communication destination.

The destination exchange 510 is configured by using hardware such as a computer device having an MPU or a memory, an external communication interface unit, and the like, in addition to packet switching or circuit switching processing by executing a predetermined program. Various processes for voice quality measurement can be performed.
The computer device and the external communication interface unit of the exchange 510 transmit the RBT signal to the communication terminal device 100 based on the call receiving means for receiving the call to the voice communication destination and the call to the voice communication destination. It also functions as each means of the ringing tone transmission means.

  FIG. 11 is a sequence diagram illustrating an example of a voice quality measurement process when a voice communication call is issued from a communication terminal apparatus in the voice quality measurement system according to the second embodiment. In this example, the same sound source file as the sound signal file of the ringing tone (RBT) sound signal stored in the exchange 510 is also stored in the communication terminal device 100 on the outgoing side. In addition, an application for voice quality measurement is installed in advance on the communication terminal device 100 on the originating side.

  In FIG. 11, the calling communication terminal apparatus 100 has a voice communication destination telephone number (for example, the telephone number of the communication terminal apparatus 900 in FIG. 1: 090 ******) in a state where the application is activated. When a user's telephone start operation accompanied by input or selection of **) is received, MOS measurement is started and a call is made to the voice communication destination telephone number. This outgoing call reaches the exchange 510 of the destination mobile communication network 500 via the exchange 210 of the outgoing mobile communication network 200.

  Upon receiving a call from communication terminal apparatus 100, called-side exchange 510 transmits a calling signal to called-side communication terminal apparatus 900, which is a voice communication destination, and based on a sound source file of a ringing tone (RBT). Then, reproduction of a ringing tone (RBT) signal that is also used as a MOS measurement audio signal is started. This ringing tone (RBT) signal is transmitted to the communication terminal apparatus 100 via the originating exchange 210.

  The communication terminal apparatus 100 records the ringing tone signal received from the destination exchange 510 and stores it as a recording file. When reception of the ring tone signal is completed, communication terminal apparatus 100 compares the sound signal of the sound source file and the sound signal of the recording file, and calculates a MOS value as an evaluation value of the sound quality based on the comparison result. And save.

  On the other hand, when an operation for receiving a call from the communication terminal device 100 is performed at the communication terminal device 900 on the called side, an off-hook signal (or a signal corresponding thereto) is transmitted from the communication terminal device 900 on the called side to the exchange 510. . When receiving the off-hook signal from the destination communication terminal apparatus 900, the destination exchange 510 transmits a response signal to the originating exchange 210, and the originating exchange 210 transmits a connection signal to the originating communication terminal apparatus 100. To do.

  When the communication terminal device 100 finishes the MOS measurement and receives a connection signal from the originating exchange 210, a voice communication line is established between the two devices 100 and 900, and the user of the communication terminal device 100 and the use of the voice communication destination are used. A normal call can be made with a person.

As described above, according to the example of FIG. 11, when voice communication is made from the communication terminal device 100 to the communication network side device 300, the communication terminal device 100 is connected to the mobile communication network 200, 500 side prior to the start of the normal call. The voice quality in the downlink direction from the communication terminal device 100 to the communication terminal apparatus 100 can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality.
In particular, according to the example of FIG. 11, it is possible to measure a voice quality by diverting a ringing tone transmitted from the exchange 510 to the communication terminal device 100 when a call is made to a voice communication destination. There is no need to prepare a separate file. In addition, since the communication terminal apparatus 100 can receive a ringing tone signal that can be used for measuring voice quality during a call to the voice communication destination, the signal used for measuring the voice quality is received. There is no need to secure a separate time.

FIG. 12 is a flowchart illustrating an example of a MOS value calculation procedure executed by the communication terminal device on the originating side in the voice quality measurement process of FIG. In this example, the MOS value is calculated only when the reception time of the ringing tone is equal to or longer than a predetermined time.
In FIG. 12, the originating communication terminal apparatus 100 starts receiving and recording a ringing tone signal from the terminating exchange 510 (step 101), and then a predetermined time (for example, 4) required for calculating the MOS value. It is determined whether or not (second to 10 seconds) has elapsed (step 102). If a connection signal is received from the originating exchange 210 before the predetermined time has elapsed (NO in step 102 and YES in step 103), the process ends without calculating the MOS value.

  If it is determined in step 102 that a predetermined time has elapsed (YES in step 102), the ringing tone recording file received and recorded so far is saved (step 104), and the MOS value is calculated and saved. (Step 105).

  As described above, as shown in FIG. 12, by calculating the MOS value only when the reception time of the ringing tone is equal to or longer than a predetermined time, the voice quality is obtained using the audio signal of the ringing sound recording file having an insufficient length. Therefore, the calculation accuracy of the MOS value is improved.

FIG. 13 is a flowchart showing another example of the MOS value calculation procedure executed in the originating communication terminal apparatus in the voice quality measurement process of FIG. In this example, the MOS value is calculated only when the sound reproduction end marker is included in the recording file.
In FIG. 13, the destination exchange 510 puts a voice reproduction end marker indicating the end of ringing tone reproduction at the end of the ringing tone (step 201). The voice reproduction end marker may be, for example, time stamp information added so as to indicate the end time of ringing tone reproduction, or may be a predetermined sound signal inserted at the end timing of ringing tone reproduction.

  The originating communication terminal apparatus 100 starts receiving and recording the ringing tone signal from the destination exchange 510 (step 202), and temporarily stores the recorded ringing tone recording file (step 203). Thereafter, the recording file is checked, and it is determined whether or not the audio reproduction end marker is included in the recording file (steps 204 and 205). Here, if the audio reproduction end marker is not included (NO in step 205), the process is terminated without calculating the MOS value.

  If it is determined in step 205 that an audio reproduction end marker is included (YES in step 205), the MOS value is calculated and stored (step 206).

  As described above, as shown in FIG. 13, by calculating the MOS value only when the voice reproduction end marker is included, the voice quality of the voice recording file of the ringing sound having an insufficient length is used. Since the evaluation value can be avoided from being calculated, the calculation accuracy of the MOS value is improved.

[Embodiment 3]
FIG. 14 is an explanatory diagram showing an example of a main configuration of the entire communication system including the voice quality measurement system according to the third embodiment (hereinafter referred to as “embodiment 3”) of the present invention. The voice quality measurement system according to the third embodiment includes a communication terminal device 100, an exchange 510 provided in a destination mobile communication network 500, and each communication terminal device connected to the exchange 510 or each user of the communication terminal device. A service providing apparatus 700 having a database 710 storing a plurality of types of ring tone files (for example, a waiting song (registered trademark) service sound source file) that can be selected and set, and a server 800 that manages voice quality information including. The third embodiment is an example in which voice quality measurement is performed using a ringing tone received from the exchange 510 on the called side. In FIG. 14, the description of the parts common to the first embodiment shown in FIG. 1 and the second embodiment shown in FIG. 10 is omitted.

  The service providing device 700 is configured by using hardware such as a computer device having an MPU, a memory, an external communication interface unit, a data storage device such as a magnetic disk or an optical disk, and a predetermined program is executed. Thus, it is possible to perform a process for providing a registration service for calling any music or sound effect to users of a plurality of communication terminal devices. A user of a communication terminal device accesses the service providing device 700 to generate a ringing tone when a call is made to the communication terminal device for each communication terminal device that makes the call or for each user. You can register.

  The server 800 is configured by using hardware such as a computer device having an MPU or a memory, an external communication interface unit, and the like, and performs various processes for measuring voice quality by executing a predetermined program. be able to.

In an example of the voice quality measurement of the third embodiment, the main control device of the communication terminal apparatus 100 receives the sound source file of the ringing tone used as the voice signal for voice quality measurement and received from the exchange 510. A recording means for recording a ringing tone, a recording file storage means for storing a recorded recording file, and a ringing tone of a sound source file and a ringing sound of a recording file are compared, and an evaluation value of voice quality is based on the comparison result. It also functions as each means of the voice quality calculation means for calculating the MOS value.
In addition, the main control device, antenna, transmission amplifier, reception amplifier, radio signal processing unit, baseband signal processing unit, etc. of the communication terminal device 100 make a call for voice communication to the voice communication destination to the exchange 510. Means, voice signal receiving means for receiving a ringing tone signal transmitted from the exchange 510 based on a call to a voice communication destination, and voice quality transmitting means for transmitting the calculated MOS value to the server 800. Also works.
Further, the computer device and the external communication interface unit of the exchange 510 access the service providing apparatus 700 based on the call receiving means for receiving a call to the voice communication destination and the call to the voice communication destination and access the database 710. It also functions as each means of a ringing tone transmitting means for searching and transmitting a ringing tone signal set for the communication terminal device or its user to the communication terminal device.

In another example of the voice quality measurement of the third embodiment, the main control device of the communication terminal device 100 also functions as a recording unit that records the ringing tone received from the exchange 510.
In addition, the main control device, antenna, transmission amplifier, reception amplifier, radio signal processing unit, baseband signal processing unit, etc. of the communication terminal device 100 make a call for voice communication to the voice communication destination to the exchange 510. Each means of a voice signal receiving means for receiving a ringing tone signal transmitted from the exchange 510 based on a call to a voice communication destination and a recording file transmitting means for transmitting a recorded recording file to the server 800 To function.
In addition, the computer device and the external communication interface unit of the server 800 are a sound source file storage unit that stores a sound source file of a ringing tone used as an audio signal for measuring voice quality, and a recording file that receives a recording file from the communication terminal device 100 And a voice quality calculation means for comparing the ring tone of the sound source file with the ring tone of the recording file received from the communication terminal apparatus 100 and calculating a MOS value as an evaluation value of the voice quality based on the comparison result. It also functions as each means.
Further, the computer apparatus and the external communication interface unit of the exchange 510 access the service providing apparatus 700 based on the call receiving means for receiving a call to the voice communication destination and the call to the voice communication destination, and access the database 710. And also functions as each means of a ringing tone transmission means for transmitting the ringing tone audio signal set for the communication terminal apparatus 100 or its user to the communication terminal apparatus 100.

  FIG. 15 is a sequence diagram illustrating an example of a downlink voice quality measurement process performed when a voice communication call is issued from a communication terminal apparatus in the voice quality measurement system according to the third embodiment. In this example, the communication terminal device 100 on the calling side is registered in advance for a combination of the communication terminal device 100 or its user and a plurality of communication terminal devices or other users of other voice communication destinations. A sound source file is saved. This sound source file is acquired in advance by a method of accessing the database 710 of the service providing apparatus 700. In addition, an application for voice quality measurement is installed in advance on the communication terminal device 100 on the originating side.

  In FIG. 15, the calling communication terminal apparatus 100 has a voice communication destination telephone number (for example, the telephone number of the communication terminal apparatus 900 in FIG. 1: 090 ******) in a state where the application is activated. When a user's telephone start operation accompanied by input or selection of **) is received, MOS measurement is started and a call is made to the voice communication destination telephone number. This outgoing call reaches the exchange 510 of the destination mobile communication network 500 via the exchange 210 of the outgoing mobile communication network 200.

  Upon receiving a call from communication terminal apparatus 100, called-side exchange 510 transmits a call signal to called-side communication terminal apparatus 900, which is a voice communication destination, and also accesses service providing apparatus 700, and The ringing tone registered for the combination of the communication terminal device 100 or the user and the communication terminal device 900 on the called side or the user is searched. Then, based on the sound source file obtained by the search, the exchange 510 on the called side starts to reproduce the ringing tone signal that is also used as the MOS measurement voice signal. This ringing tone signal is transmitted to the communication terminal apparatus 100 via the originating exchange 210.

  The communication terminal apparatus 100 records the ringing tone signal received from the destination exchange 510 and stores it as a recording file. When reception of the ringing sound signal is completed, communication terminal apparatus 100 compares the sound signal of the sound source file and the sound signal of the recording file, and calculates a MOS value as an evaluation value of the sound quality based on the comparison result. And save.

  On the other hand, when an operation for receiving a call from the communication terminal device 100 is performed at the communication terminal device 900 on the called side, an off-hook signal (or a signal corresponding thereto) is transmitted from the communication terminal device 900 on the called side to the exchange 510. . When receiving the off-hook signal from the destination communication terminal apparatus 900, the destination exchange 510 transmits a response signal to the originating exchange 210, and the originating exchange 210 transmits a connection signal to the originating communication terminal apparatus 100. To do.

  When the communication terminal device 100 finishes the MOS measurement and receives a connection signal from the originating exchange 210, a voice communication line is established between the two devices 100 and 900, and the user of the communication terminal device 100 and the use of the voice communication destination are used. A normal call can be made with a person.

As described above, according to the example of FIG. 15, when a voice communication is made from the communication terminal device 100 to the service providing device 300, the communication terminal device 100 starts from the mobile communication network 200, 500 side prior to the start of the normal call. The voice quality in the downlink direction to the communication terminal apparatus 100 can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality.
In particular, according to the example of FIG. 15, it is possible to measure voice quality by diverting a ringing tone transmitted from the exchange 510 to the communication terminal device 100 when a call is made to the voice communication destination. There is no need to prepare a separate file. In addition, since the communication terminal apparatus 100 can receive a ringing tone signal that can be used for measuring voice quality during a call to the voice communication destination, the signal used for measuring the voice quality is received. There is no need to secure a separate time.

  FIG. 16 is a sequence diagram illustrating another example of the voice quality measurement process when a voice communication call is issued from the communication terminal apparatus in the voice quality measurement system according to the third embodiment. In this example, not the communication terminal device 100 on the originating side but the server 800 calculates the MOS value. The server 800 stores a sound source file of a ringing tone registered in advance for a combination of a plurality of communication terminal devices or users thereof. This sound source file is acquired in advance by a method of accessing the database 710 of the service providing apparatus 700. In addition, an application for voice quality measurement is installed in advance on the communication terminal device 100 on the originating side.

  In FIG. 16, the originating communication terminal apparatus 100 has a voice communication destination telephone number (for example, the telephone number of the communication terminal apparatus 900 in FIG. 1: 090 ******) in a state where the application is activated. When a user's telephone start operation accompanied by input or selection of **) is received, MOS measurement is started and a call is made to the voice communication destination telephone number. This outgoing call reaches the exchange 510 of the destination mobile communication network 500 via the exchange 210 of the outgoing mobile communication network 200.

  Upon receiving a call from communication terminal apparatus 100, called-side exchange 510 transmits a call signal to called-side communication terminal apparatus 900, which is a voice communication destination, and also accesses service providing apparatus 700, and The ringing tone registered for the combination of the communication terminal device 100 or the user and the communication terminal device 900 on the called side or the user is searched. Then, based on the sound source file of the ringing tone obtained by the search, the exchange 510 on the called side starts to reproduce the ringing tone signal that is also used as the MOS measurement audio signal. This ringing tone signal is transmitted to the communication terminal apparatus 100 via the originating exchange 210.

  The communication terminal apparatus 100 records the ringing tone signal received from the destination exchange 510 and stores it as a recording file. When the reception of the ringing tone signal is completed, the communication terminal apparatus 100 transmits the ringing tone recording file to the server 800 together with the measurement environment information.

  The server 800 obtains a sound signal of a sound source file and a sound signal of a recording file that are registered in advance for a combination of the communication terminal device 100 on the originating side or a user thereof and the communication terminal device 900 on the receiving side or the user. The comparison is made, and the MOS value as the voice quality evaluation value is calculated and stored based on the comparison result.

  On the other hand, when an operation for receiving a call from the communication terminal device 100 is performed at the communication terminal device 900 on the called side, an off-hook signal (or a signal corresponding thereto) is transmitted from the communication terminal device 900 on the called side to the exchange 510. . When receiving the off-hook signal from the destination communication terminal apparatus 900, the destination exchange 510 transmits a response signal to the originating exchange 210, and the originating exchange 210 transmits a connection signal to the originating communication terminal apparatus 100. To do.

  When the communication terminal device 100 finishes the MOS measurement and receives the connection signal from the originating exchange 210, a voice communication line is established between the two devices 100 and 900, and the user of the communication terminal device 100 and the voice communication destination A normal call can be made with the user.

As described above, according to the example of FIG. 16, when voice communication is made from the communication terminal device 100 to the service providing device 300, the server 800 is connected from the mobile communication network 200, 500 side to the communication terminal prior to the start of the normal call. The voice quality in the downlink direction to the apparatus 100 can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality.
In particular, according to the example of FIG. 16, it is possible to measure the voice quality by diverting the ringing tone transmitted from the exchange 510 to the communication terminal device 100 when a call is made to the voice communication destination. There is no need to prepare a file and a dedicated device for it. In addition, since the communication terminal apparatus 100 can receive a ringing tone signal that can be used for measuring voice quality during a call to the voice communication destination, the signal used for measuring the voice quality is received. There is no need to secure a separate time.

  Also in the examples of FIGS. 15 and 16, the MOS value is calculated only when the ringing tone reception time is equal to or longer than the predetermined time as shown in FIG. The MOS value may be calculated only when the reproduction end marker is included.

[Embodiment 4]
FIG. 17 is an explanatory diagram showing an example of a main configuration of the entire communication system including the voice quality measurement system according to the fourth embodiment (hereinafter referred to as “embodiment 4”) of the present invention. The voice quality measurement system according to the fourth embodiment includes a communication terminal device 100 and a communication network side device 400. The communication network side device 400 includes an intelligent exchange 410 and a server 420 that manages voice quality information. The communication network side device 400 may include exchanges 210 and 510. The fourth embodiment is an example in which voice quality measurement is performed during a call in which the communication terminal apparatus 100 performs voice communication with another communication terminal apparatus. In FIG. 17, the description of the same parts as those in the first embodiment shown in FIG. 1 and the second embodiment shown in FIG. 10 is omitted.

  Each of the intelligent exchange 410 and the server 420 is configured by using hardware such as a computer device having an MPU, a memory, and the like, and an external communication interface unit, for example, for measuring voice quality by executing a predetermined program. Various processes can be performed.

In an example of the voice quality measurement of the fourth embodiment, the computer device and the external communication interface unit of the communication network side device 400 (intelligent switch 410, server 420) perform voice communication between the communication terminal device 100 and the voice communication destination. Voice data storage means for acquiring voice data transmitted from the voice communication destination to the communication terminal apparatus 100 and saving it as a sound source recording file of a voice signal for measuring voice quality, and a sound source recording file of the voice signal It also functions as each means of the sound source recording file transmitting means for transmitting to the communication terminal apparatus 100.
Further, the main control device of the communication terminal device 100 receives the sound source recording file of the audio signal from the communication network side device 400, the voice communication destination during the voice communication with the voice communication destination. Recording means for recording received sound data, measuring target recording file storage means for storing the recorded recording file as a measuring target recording file, and comparing the sound signal of the sound source recording file with the sound signal of the measuring target recording file Also, it functions as each means of the voice quality calculation means for calculating the voice quality evaluation value based on the comparison result.

In another example of the voice quality measurement according to the fourth embodiment, the main control device of the communication terminal apparatus 100 serves as a recording unit that records voice data received from the voice communication destination during voice communication with the voice communication destination. Also works.
Further, the main control device, antenna, transmission amplifier, reception amplifier, radio signal processing unit, baseband signal processing unit, and the like of the communication terminal apparatus 100 transmit the recorded recording file to the communication network side apparatus 400 as a measurement target recording file. It also functions as a recording file transmission means.
In addition, the computer device and the external communication interface unit of the communication network side device 400 (intelligent switch 410, server 420) communicate from the voice communication destination to the communication terminal device 100 during voice communication between the communication terminal device 100 and the voice communication destination. Voice data storage means for acquiring voice data transmitted toward the voice and storing it as a sound source recording file of a voice signal for voice quality measurement, and a measurement target recording file receiving means for receiving a measurement target recording file from the communication terminal apparatus 100 The voice signal of the sound source recording file and the voice signal of the recording file to be measured are compared to function as each means of the voice quality calculation means for calculating the evaluation value of the voice quality.

In still another example of the voice quality measurement according to the fourth embodiment, the computer device and the external communication interface unit of the communication network side device 400 (intelligent switch 410, server 420) are connected to the voice between the communication terminal device 100 and the voice communication destination. Audio data storage means for acquiring audio data transmitted from the communication terminal device 100 toward the audio communication destination during communication and storing it as a measurement target recording file of an audio signal for audio quality measurement, and an audio signal It also functions as each unit of the measurement target recording file transmission unit that transmits the measurement target recording file to the communication terminal device 100.
The main control device of the communication terminal apparatus 100 is a recording means for recording a voice signal to be transmitted to the voice communication destination during voice communication with the voice communication destination, and the recorded recording file is used as a sound source recording file. The sound source recording file storage means for storing, the sound quality calculation means for comparing the sound signal of the sound source recording file and the sound signal of the recording file to be measured, and calculating the evaluation value of the sound quality based on the comparison result Function.
The main control device, the antenna, the transmission amplifier, the reception amplifier, the radio signal processing unit, the baseband signal processing unit, etc. of the communication terminal device 100 receive the measurement target recording file of the audio signal from the communication network side device 400. The receiving means also functions.

In another example of the voice quality measurement according to the fourth embodiment, the main control device of the communication terminal apparatus 100 records a voice signal to be transmitted to the voice communication destination during voice communication with the voice communication destination. It also functions as a means.
Also, the main control device, antenna, transmission amplifier, reception amplifier, radio signal processing unit, baseband signal processing unit, etc. of the communication terminal apparatus 100 transmit the recorded recording file to the communication network side apparatus 400 as a sound recording file. It also functions as a recording file transmission means.
In addition, the computer device and the external communication interface unit of the communication network side device 400 (intelligent switch 410, server 420) communicate with the voice communication destination from the communication terminal device 100 during voice communication between the communication terminal device 100 and the voice communication destination. Sound data storage means for acquiring sound data transmitted toward the sound source and storing it as a measurement target recording file of a sound signal for sound quality measurement, sound source recording file receiving means for receiving a sound source recording file from the communication terminal device 100, The sound signal of the sound source recording file and the sound signal of the recording file to be measured are compared to function as each means of sound quality calculation means for calculating the sound quality evaluation value.

  Next, based on FIGS. 18 to 21, after recording all voice signals during a call in which the communication terminal device 100 performs voice communication with other communication terminal devices in the fourth embodiment, An example in which an audio signal in a predetermined range that satisfies a predetermined condition is extracted from a sound source recording file and audio quality is measured will be described. Here, the predetermined condition and the predetermined range are conditions set in order to specify a voice quality measurement target in an audio signal transmitted / received by audio communication between the communication terminal device 100 and the audio communication destination.

FIG. 18 is a sequence diagram illustrating an example of a downlink voice quality measurement process performed during a call between a communication terminal apparatus and a voice communication destination in the voice quality measurement system according to the fourth embodiment.
18, after a telephone communication line is established between the communication terminal apparatus 100 and the voice communication destination (for example, the communication terminal apparatus 900 in FIG. 17) and the call start process is completed, the communication terminal apparatus 100 and the voice communication destination During the voice communication, the server 420 transmits a MOS measurement command to the intelligent exchange 410 and the communication terminal device 100.

  When the intelligent exchange 420 receives the MOS measurement command from the server 420, the intelligent exchange 420 duplicates and acquires the voice data transmitted from the voice communication destination to the communication terminal apparatus 100, and records the recording start and recording end time information (for example, absolute Along with time stamp information (time information), it is stored as a sound source recording file of an audio signal for audio quality measurement created from audio data. The sound source recording file of the audio signal is transmitted to communication terminal apparatus 100.

  On the other hand, when receiving the MOS measurement command from the server 420, the communication terminal device 100 records the voice signal received from the voice communication destination during voice communication with the voice communication destination, and records the recorded recording file. It is stored as a recording file to be measured together with time stamp information which is time information of start and end of recording (for example, absolute time information). Communication terminal apparatus 100 receives a sound source recording file from intelligent exchange 410.

  Next, the communication terminal apparatus 100 extracts a predetermined range of audio signals that satisfy a predetermined condition for use in the MOS value calculation for the measurement target recording file and the sound source recording file. Information on the extraction condition is stored in the communication terminal device 100 in advance.

  As the extraction condition, for example, the attribute condition of the recording file of the audio signal conforming to the international standard system (POLQA, PESQ) for calculating the MOS value described in Non-Patent Document 1 and Non-Patent Document 2 is set. can do. The audio signal recording file attribute conditions are, for example, the length of the audio signal used to calculate the MOS value (for example, 3 seconds or more), silent time (at least 200 milliseconds) at the beginning and end, and noise floor (−84 dB or less). ) Etc.

  Next, the communication terminal device 100 compares the sound signals in a predetermined range corresponding to each other extracted from the sound source recording file and the measurement target recording file, and calculates and stores the MOS value based on the comparison result. Communication terminal apparatus 100 transmits the calculated MOS value to server 420 together with measurement environment information such as location information, time information, and carrier information of communication terminal apparatus 100 at the time of voice quality measurement. The server 420 stores the MOS value received from the communication terminal device 100 and the measurement environment information in association with each other.

  As described above, according to the example of FIG. 18, during the voice communication between the communication terminal apparatus 100 and the voice communication destination, the communication terminal apparatus 100 transmits the voice quality in the downlink direction from the mobile communication network 200 side to the communication terminal apparatus 100. Can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality.

FIG. 19 is a sequence diagram illustrating another example of the downlink voice quality measurement process performed during a call between the communication terminal apparatus and the voice communication destination in the voice quality measurement system according to the fourth embodiment.
In FIG. 19, after the telephone communication line is established between the communication terminal apparatus 100 and the voice communication destination (for example, the communication terminal apparatus 900 in FIG. 17) and the call start process is completed, the communication terminal apparatus 100 and the voice communication destination During the voice communication, the server 420 transmits a MOS measurement command to the intelligent exchange 410 and the communication terminal device 100.

  When the intelligent exchange 420 receives the MOS measurement command from the server 420, the intelligent exchange 420 duplicates and acquires the voice data transmitted from the voice communication destination to the communication terminal apparatus 100, and records the recording start and recording end time information (for example, absolute Along with time stamp information (time information), it is stored as a sound source recording file of an audio signal for audio quality measurement created from audio data. The sound source recording file of the audio signal is transmitted to the server 420.

  On the other hand, when receiving the MOS measurement command from the server 420, the communication terminal device 100 records the voice signal received from the voice communication destination during voice communication with the voice communication destination, and records the recorded recording file. It is stored as a measurement target recording file together with time stamp information which is time information (for example, absolute time information) of start and end of recording. This measurement target recording file is transmitted to the server 420 together with measurement environment information such as location information, time information, carrier information, etc. of the communication terminal device 100 at the time of voice quality measurement.

  Next, the server 420 extracts an audio signal in a predetermined range that satisfies the above-described predetermined conditions for use in the MOS value calculation for the measurement target recording file and the sound source recording file. Information on the extraction condition is stored in the server 420 in advance.

  Next, the server 420 compares audio signals in a predetermined range corresponding to each other extracted from the sound source recording file and the measurement target recording file, calculates a MOS value based on the comparison result, and calculates the calculated MOS value and the measurement environment information. And store them in association with each other.

  As described above, according to the example of FIG. 19, during the voice communication between the communication terminal device 100 and the voice communication destination, the server 420 measures the voice quality in the downlink direction from the mobile communication network 200 side to the communication terminal device 100. can do. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality. Further, since the MOS value is calculated by the server 420, the load on the communication terminal device 100 can be reduced.

FIG. 20 is a sequence diagram illustrating an example of uplink voice quality measurement processing performed during a call between the communication terminal apparatus and the voice communication destination in the voice quality measurement system according to the fourth embodiment.
20, after a telephone communication line is established between the communication terminal apparatus 100 and a voice communication destination (for example, the communication terminal apparatus 900 in FIG. 17) and the call start process is completed, the communication terminal apparatus 100 and the voice communication destination During the voice communication, the server 420 transmits a MOS measurement command to the intelligent exchange 410 and the communication terminal device 100.

  When the intelligent exchange 420 receives the MOS measurement command from the server 420, the intelligent exchange 420 duplicates and acquires the voice data transmitted from the communication terminal device 100 to the voice communication destination, and records the time information (for example, absolute) Along with the time stamp information (time information), it is stored as a measurement target recording file of a voice signal for voice quality measurement created from the voice data, and the measurement target recording file is transmitted to the communication terminal apparatus 100.

  On the other hand, when receiving a MOS measurement command from the server 420, the communication terminal apparatus 100 records a voice signal to be transmitted to the voice communication destination during voice communication with the voice communication destination, and records the recorded recording file. Then, it is stored as a sound source recording file together with time stamp information which is time information of recording start and recording end (for example, absolute time information). Further, the communication terminal device 100 receives the measurement target recording file from the intelligent exchange 410.

  Next, the communication terminal apparatus 100 extracts a predetermined range of audio signals that satisfy the above-described predetermined conditions for use in calculating the MOS value for the measurement target recording file and the sound source recording file. Information on the extraction condition is stored in the communication terminal device 100 in advance.

  Next, the communication terminal device 100 compares the sound signal recording file and the audio signal in a predetermined range corresponding to each other extracted from the measurement target recording file, calculates a MOS value based on the comparison result, and calculates the calculated MOS value. The information is transmitted to the server 420 together with the measurement environment information such as the location information of the communication terminal device 100, the time information, and the carrier information at the time of voice quality measurement. The server 420 stores the MOS value received from the communication terminal device 100 and the measurement environment information in association with each other.

  As described above, according to the example of FIG. 20, during the voice communication between the communication terminal apparatus 100 and the voice communication destination, the communication terminal apparatus 100 performs uplink voice quality from the communication terminal apparatus 100 to the mobile communication network 200 side. Can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality.

FIG. 21 is a sequence diagram illustrating another example of uplink voice quality measurement processing performed during a call between a communication terminal device and a voice communication destination in the voice quality measurement system according to the fourth embodiment.
In FIG. 21, after a telephone communication line is established between the communication terminal device 100 and a voice communication destination (for example, the communication terminal device 900 in FIG. 17) and the call start process is completed, the communication terminal device 100 and the voice communication destination During the voice communication, the server 420 transmits a MOS measurement command to the intelligent exchange 410 and the communication terminal device 100.

  When the intelligent exchange 420 receives the MOS measurement command from the server 420, the intelligent exchange 420 duplicates and acquires the voice data transmitted from the communication terminal device 100 to the voice communication destination, and records the time information (for example, absolute) Together with the time stamp information (time information), it is stored as a recording file for measurement of a sound signal for sound quality measurement created from sound data. The sound source recording file of the audio signal is transmitted to the server 420.

  On the other hand, when receiving a MOS measurement command from the server 420, the communication terminal apparatus 100 records a voice signal to be transmitted to the voice communication destination during voice communication with the voice communication destination, and records the recorded recording file. Save as a sound recording file. This sound source recording file is transmitted to the server 420 together with measurement environment information such as location information, time information, carrier information, etc. of the communication terminal device 100 at the time of measuring voice quality.

  Next, the server 420 extracts an audio signal in a predetermined range that satisfies the above-described predetermined conditions for use in the MOS value calculation for the measurement target recording file and the sound source recording file. Information on the extraction condition is stored in the server 420 in advance.

  Next, the server 420 compares audio signals in a predetermined range corresponding to each other extracted from the sound source recording file and the measurement target recording file, calculates a MOS value based on the comparison result, and calculates the calculated MOS value and the measurement environment information. Are stored in association with each other.

  As described above, according to the example of FIG. 21, during the voice communication between the communication terminal apparatus 100 and the voice communication destination, the server 210 measures the voice quality in the uplink direction from the communication terminal apparatus 100 to the mobile communication network 200 side. can do. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality. Further, since the MOS value is calculated by the server 420, the load on the communication terminal device 100 can be reduced.

  Next, based on FIG. 22 to FIG. 25, the voice signal during a call in which the communication terminal device 100 performs voice communication with another communication terminal device in the fourth embodiment is set as information on preset recording options. A description will be given of an example in which sound quality measurement is performed using all or a part of sound signals of a recording file to be measured and a sound source recording file.

  Here, the recording option is a condition set in order to specify a voice quality measurement target in a voice signal transmitted / received by voice communication between the communication terminal apparatus 100 and the voice communication destination. This recording option may be set in advance before the start of the call, or may be set dynamically immediately after the start of the call.

FIG. 22 is a sequence diagram illustrating still another example of the downlink voice quality measurement process performed during a call between the communication terminal apparatus and the voice communication destination in the voice quality measurement system according to the fourth embodiment.
22, after the telephone communication line is established between the communication terminal apparatus 100 and the voice communication destination (for example, the communication terminal apparatus 900 in FIG. 17) and the call start process is completed, the communication terminal apparatus 100 and the voice communication destination During the voice communication, the server 420 transmits a MOS measurement command to the intelligent exchange 410 and the communication terminal device 100.

The MOS measurement command includes recording option information. This recording option is a condition set for specifying a voice quality measurement target in a voice signal transmitted and received by voice communication between the communication terminal apparatus 100 and a voice communication destination. For example, as the recording option, the number of times recording is performed during a call in which the communication terminal apparatus 100 performs voice communication with another communication terminal apparatus, the recording start time (absolute time, or call start time as a reference) Relative time), recording time, etc. More specific examples of recording options are given in the following (1) to (4).
(1) Number of recordings: 3 times (2) First recording: 10 seconds after the call start time, 20 seconds recording (3) Second recording: 40 seconds after the call start time, 20 seconds recording ( 4) Third recording: 20 seconds after 70 seconds from the call start time

  When the intelligent exchange 420 receives the MOS measurement command including the recording option from the server 420, the intelligent switching unit 420 obtains a duplicate of the voice data transmitted from the voice communication destination to the communication terminal device 100 based on the recording option, and performs the recording. Along with time stamp information, which is time information for starting and ending recording (for example, absolute time information), it is stored as a sound source recording file of a sound signal for sound quality measurement created from sound data. The sound source recording file of the audio signal is transmitted to communication terminal apparatus 100.

  On the other hand, when receiving the MOS measurement command including the recording option from the server 420, the communication terminal apparatus 100 receives the voice signal received from the voice communication destination based on the recording option during the voice communication with the voice communication destination. Recording is performed, and the recorded recording file is stored as a measurement target recording file together with time stamp information that is time information (for example, absolute time information) at the start and end of recording. Communication terminal apparatus 100 receives a sound source recording file from intelligent exchange 410.

  Next, the communication terminal device 100 extracts all or part of the recorded audio signal for the measurement target recording file and the sound source recording file. Information on the extraction condition is stored in the communication terminal device 100 in advance.

  Next, the communication terminal device 100 compares the sound signals in a predetermined range corresponding to each other extracted from the sound source recording file and the measurement target recording file, and calculates and stores the MOS value based on the comparison result. Communication terminal apparatus 100 transmits the calculated MOS value to server 420 together with measurement environment information such as location information, time information, and carrier information of communication terminal apparatus 100 at the time of voice quality measurement. The server 420 stores the MOS value received from the communication terminal device 100 and the measurement environment information in association with each other.

  As described above, according to the example of FIG. 22, during the voice communication between the communication terminal apparatus 100 and the voice communication destination, the communication terminal apparatus 100 transmits the voice quality in the downlink direction from the mobile communication network 200 side to the communication terminal apparatus 100. Can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality.

FIG. 23 is a sequence diagram illustrating still another example of the downlink voice quality measurement process performed during a call between the communication terminal apparatus and the voice communication destination in the voice quality measurement system according to the fourth embodiment.
23, after the telephone communication line is established between the communication terminal apparatus 100 and the voice communication destination (for example, the communication terminal apparatus 900 in FIG. 17) and the call start process is completed, the communication terminal apparatus 100 and the voice communication destination During the voice communication, the server 420 transmits a MOS measurement command including the recording option described above to the intelligent exchange 410 and the communication terminal device 100.

When the intelligent exchange 420 receives the MOS measurement command including the recording option from the server 420, the intelligent switching unit 420 obtains a duplicate of the voice data transmitted from the voice communication destination to the communication terminal device 100 based on the recording option, and performs the recording. Along with time stamp information which is time information (for example, absolute time information) at the start and end of recording, it is stored as a sound source recording file of a sound signal for sound quality measurement created from sound data. The sound source recording file of the audio signal is transmitted to the server 420.

  On the other hand, when receiving the MOS measurement command including the recording option from the server 420, the communication terminal apparatus 100 receives the voice signal received from the voice communication destination based on the recording option during the voice communication with the voice communication destination. Recording is performed, and the recorded recording file is stored as a measurement target recording file together with time stamp information which is time information (for example, absolute time information) at the start and end of recording. This measurement target recording file is transmitted to the server 420 together with measurement environment information such as location information, time information, carrier information, etc. of the communication terminal device 100 at the time of voice quality measurement.

  Next, the server 420 extracts all or part of the recorded audio signal for the measurement target recording file and the sound source recording file. Information on the extraction condition is stored in the server 420 in advance.

  Next, the server 420 compares audio signals in a predetermined range corresponding to each other extracted from the sound source recording file and the measurement target recording file, calculates a MOS value based on the comparison result, and calculates the calculated MOS value and the measurement environment information. And store them in association with each other.

  As described above, according to the example of FIG. 23, during the voice communication between the communication terminal device 100 and the voice communication destination, the server 420 measures the voice quality in the downlink direction from the mobile communication network 200 side to the communication terminal device 100. can do. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality. Further, since the MOS value is calculated by the server 420, the load on the communication terminal device 100 can be reduced.

FIG. 24 is a sequence diagram illustrating still another example of the uplink voice quality measurement process performed during a call between the communication terminal apparatus and the voice communication destination in the voice quality measurement system according to the fourth embodiment.
24, after a telephone communication line is established between the communication terminal device 100 and a voice communication destination (for example, the communication terminal device 900 in FIG. 17) and the call start processing is completed, the communication terminal device 100, the voice communication destination, During the voice communication, the server 420 transmits a MOS measurement command including the recording option described above to the intelligent exchange 410 and the communication terminal device 100.

  When the intelligent exchange 420 receives the MOS measurement command including the recording option from the server 420, based on the recording option, the intelligent switch 420 duplicates and acquires the voice data transmitted from the communication terminal device 100 to the voice communication destination, and records it. Along with time stamp information which is time information (for example, absolute time information) at the start and end of recording, it is stored as a measurement target recording file of a voice signal for voice quality measurement created from the voice data, and the measurement target recording file is stored in the communication terminal device. To 100.

  On the other hand, when receiving the MOS measurement command including the recording option from the server 420, the communication terminal device 100 transmits the voice to the voice communication destination based on the recording option during the voice communication with the voice communication destination. The signal is recorded, and the recorded recording file is stored as a sound source recording file together with time stamp information that is time information (for example, absolute time information) at the start and end of recording. Further, the communication terminal device 100 receives the measurement target recording file from the intelligent exchange 410.

  Next, the communication terminal device 100 extracts all or part of the recorded audio signal for the measurement target recording file and the sound source recording file. Information on the extraction condition is stored in the communication terminal device 100 in advance.

  Next, the communication terminal device 100 compares the sound signal recording file and the audio signal in a predetermined range corresponding to each other extracted from the measurement target recording file, calculates a MOS value based on the comparison result, and calculates the calculated MOS value. The information is transmitted to the server 420 together with the measurement environment information such as the location information of the communication terminal device 100, the time information, and the carrier information at the time of voice quality measurement. The server 420 stores the MOS value received from the communication terminal device 100 and the measurement environment information in association with each other.

  As described above, according to the example of FIG. 24, during the voice communication between the communication terminal apparatus 100 and the voice communication destination, the communication terminal apparatus 100 performs uplink voice quality from the communication terminal apparatus 100 to the mobile communication network 200 side. Can be measured. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality.

FIG. 25 is a sequence diagram illustrating still another example of uplink voice quality measurement processing performed during a call between a communication terminal device and a voice communication destination in the voice quality measurement system according to the fourth embodiment.
25, after a telephone communication line is established between the communication terminal apparatus 100 and the voice communication destination (for example, the communication terminal apparatus 900 in FIG. 17) and the call start process is completed, the communication terminal apparatus 100, the voice communication destination, During the voice communication, the server 420 transmits a MOS measurement command including the recording option described above to the intelligent exchange 410 and the communication terminal device 100.

  When the intelligent exchange 420 receives the MOS measurement command including the recording option from the server 420, based on the recording option, the intelligent switch 420 duplicates and acquires the voice data transmitted from the communication terminal device 100 to the voice communication destination, and records it. Along with time stamp information that is time information (for example, absolute time information) at the start and end of recording, it is stored as a measurement target recording file of an audio signal for audio quality measurement created from audio data. The sound source recording file of the audio signal is transmitted to the server 420.

  On the other hand, when receiving the MOS measurement command including the recording option from the server 420, the communication terminal device 100 transmits the voice to the voice communication destination based on the recording option during the voice communication with the voice communication destination. Record the signal and save the recorded recording file as a sound recording file. This sound source recording file is transmitted to the server 420 together with measurement environment information such as location information, time information, carrier information, etc. of the communication terminal device 100 at the time of measuring voice quality.

  Next, the server 420 extracts all or part of the recorded audio signal for the measurement target recording file and the sound source recording file. Information on the extraction condition is stored in the server 420 in advance.

  Next, the server 420 compares audio signals in a predetermined range corresponding to each other extracted from the sound source recording file and the measurement target recording file, calculates a MOS value based on the comparison result, and calculates the calculated MOS value and the measurement environment information. Are stored in association with each other.

  As described above, according to the example of FIG. 25, during the voice communication between the communication terminal device 100 and the voice communication destination, the server 420 measures the voice quality in the uplink direction from the communication terminal device 100 to the mobile communication network 200 side. can do. In addition, when measuring the voice quality, it is not necessary to request the user of the communication terminal apparatus 100 to perform a special operation for measuring the voice quality. Further, since the MOS value is calculated by the server 420, the load on the communication terminal device 100 can be reduced.

In the example of FIGS. 18 to 25 described above, the intelligent exchange 410 performs the duplication and recording of the received audio signal and the transmitted audio signal, the storage of the sound source recording file and the measurement target recording file, and the transmission to the communication terminal device 100. However, it may be performed by the exchange 210 or the exchange 510.
In the examples of FIGS. 19, 21, 23 and 25, the MOS value is calculated by the server, but may be calculated by the intelligent exchange 410.

  Further, in the fourth embodiment, when the MOS value cannot be calculated, the server 420 may store information indicating that the MOS value cannot be calculated instead of the MOS value. Further, the MOS value, the measurement target recording file used for calculating the MOS value or the identification information thereof, and the sound source recording file used for calculating the MOS value or the identification information may be stored in association with each other. Good. Further, since the MOS value is calculated by the server 420, the load on the communication terminal device 100 can be reduced.

  In each of the fourth embodiments, if the MOS value cannot be calculated, the server 420 may store information indicating that the MOS value could not be calculated instead of the MOS value. Further, the MOS value, the measurement target recording file used for calculating the MOS value or the identification information thereof, and the sound source recording file used for calculating the MOS value or the identification information may be stored in association with each other. Good.

  The processing steps in the communication terminal device 100, the servers 320, 420, 800, and 850, the communication network side devices 300 and 400 having the intelligent exchanges 310 and 420, and the service providing device 700 having the database 710 described in this specification. In addition to the above-described means, the components can be implemented by various means. For example, these processing steps and components may be implemented in hardware, firmware, software, or a combination thereof.

  For hardware implementation, in order to realize the above steps and components in an entity (for example, various wireless communication devices, NodeBs, communication terminal devices, servers, gateways, exchanges, computers, hard disk drive devices, or optical disk drive devices) The means such as processing units used are one or more application specific ICs (ASICs), digital signal processors (DSPs), digital signal processors (DSPDs), programmable logic devices (PLDs), field programmables. A gate array (FPGA), processor, controller, microcontroller, microprocessor, electronic device, other electronic unit designed to perform the functions described herein, a computer, or their It may be implemented in a suit look.

  Also, for firmware and / or software implementation, means such as processing units used to implement the above components may be programs (eg, procedures, functions, modules, instructions) that perform the functions described herein. , Etc.). In general, any computer / processor readable medium that specifically embodies firmware and / or software code is means such as a processing unit used to implement the steps and components described herein. May be used to implement For example, the firmware and / or software code may be stored in a memory, for example, in a control device, and executed by a computer or processor. The memory may be implemented inside the computer or processor, or may be implemented outside the processor. The firmware and / or software code may be, for example, random access memory (RAM), read only memory (ROM), nonvolatile random access memory (NVRAM), programmable read only memory (PROM), electrically erasable PROM (EEPROM) ), FLASH memory, floppy disk, compact disk (CD), digital versatile disk (DVD), magnetic or optical data storage, etc. Good. The code may be executed by one or more computers or processors, and may cause the computers or processors to perform the functional aspects described herein.

  Also, descriptions of embodiments disclosed herein are provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. The present disclosure is therefore not limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.

DESCRIPTION OF SYMBOLS 100 Communication terminal device 200 Mobile communication network 210 Switch 300, 400 Communication network side device 310, 410 Intelligent switch 320, 420 Server 500 Mobile communication network 510 Switch 600 Fixed communication network 700 Service providing device 710 Database 800, 850 Server 900, 910 Communication Terminal device (voice communication destination)

"Perceptual evaluation of speech quality (PESQ): An objective method for end-to-end speech quality assessment of narrow-band telephone networks and speech codecs", SERIES P: TELEPHONE TRANSMISSION QUALITY, TELEPHONE INSTALLATIONS, LOCAL LINE NETWORKS, Methods for objective and subjective assessment of quality, TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU, ITU-T Recommendation P.862 (02/2001). "Perceptual objective listening quality assessment", SERIES P: ERMINALS AND SUBJECTIVE AND OBJECTIVE ASSESSMENT METHODS, Methods for objective and subjective assessment of speech quality, TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU, ITU-T Recommendation P.863 (01/2011).

Claims (20)

A communication terminal device capable of wireless communication with the base station of a cellular mobile communication network including a base station and an exchange; and a communication network side device provided in a communication network including the cellular mobile communication network; A voice quality measurement system for measuring voice quality of voice communication via the cellular mobile communication network,
Sound source file storage means for storing a sound source file of an audio signal for measuring audio quality;
Audio signal transmitting means for transmitting the audio signal of the sound source file from the communication network side device to the communication terminal device or from the communication terminal device to the communication network side device;
Recording means for recording a voice signal from the communication network side device received by the communication terminal device or a voice signal from the communication terminal device received by the communication network side device;
Recording file storage means for storing a recording file of the audio signal recorded by the recording means;
The audio signal of the sound source file and the audio signal of the recording file are compared, and based on the comparison result, the audio between the communication terminal device and the communication network side device via the cellular mobile communication network A voice quality calculation means for calculating an evaluation value of voice quality of communication;
A voice quality measurement system comprising: The voice quality measurement system of claim 1,
The communication terminal device
Sound source file storage means for storing a sound source file of an audio signal for measuring audio quality;
Calling means for calling voice communication toward the communication network side device;
Voice signal receiving means for receiving a voice signal for voice quality measurement transmitted from the communication network side device;
Recording means for recording the audio signal received from the communication network side device,
Recording file storage means for storing a recording file of the audio signal recorded by the recording means;
The audio signal of the sound source file and the audio signal of the recording file are compared, and based on the comparison result, in the downlink direction from the communication network side device to the communication terminal device via the cellular mobile communication network Voice quality calculation means for calculating an evaluation value of voice quality of voice communication,
The communication network side device is:
Sound source file storage means for storing a sound source file of an audio signal for measuring audio quality;
A voice quality measuring system comprising: voice signal transmitting means for transmitting the voice signal for measuring the voice quality toward the communication terminal device. The voice quality measurement system of claim 1,
The communication terminal device
Calling means for calling voice communication toward the communication network side device;
Voice signal receiving means for receiving a voice signal for voice quality measurement transmitted from the communication network side device;
Recording means for recording the audio signal received from the communication network side device,
A recording file transmission means for transmitting a recording file of the audio signal recorded by the recording means to the communication network side device,
The communication network side device is:
Sound source file storage means for storing a sound source file of an audio signal for measuring audio quality;
Audio signal transmitting means for transmitting the audio signal for measuring the audio quality toward the communication terminal device;
A recording file receiving means for receiving a recording file of an audio signal transmitted from the communication terminal device;
Recording file storage means for storing a recording file received from the communication terminal device;
The audio signal of the sound source file and the audio signal of the recording file are compared, and based on the comparison result, in the downlink direction from the communication network side device to the communication terminal device via the cellular mobile communication network A voice quality measurement system comprising: voice quality calculation means for calculating an evaluation value of voice quality of voice communication. The voice quality measurement system of claim 1,
The communication terminal device
Sound source file storage means for storing a sound source file of an audio signal for measuring audio quality;
Calling means for calling voice communication toward the communication network side device;
Voice signal transmitting means for transmitting the voice signal for measuring the voice quality to the communication terminal device together with the call;
A recording file receiving means for receiving a recording file recording the voice signal for measuring the voice quality from the communication network side device;
The audio signal of the sound source file and the audio signal of the recording file are compared, and based on the comparison result, in the upstream direction from the communication terminal device to the communication network side device via the cellular mobile communication network Voice quality calculation means for calculating an evaluation value of voice quality of voice communication,
The communication network side device is:
Voice signal receiving means for receiving a voice signal for voice quality measurement transmitted from the communication terminal device;
Recording means for recording the audio signal received from the communication terminal device;
A recording file transmission means for transmitting a recording file of the audio signal recorded by the recording means to the communication terminal device;
A voice quality measurement system comprising: The voice quality measurement system of claim 1,
The communication terminal device
Sound source file storage means for storing a sound source file of an audio signal for measuring audio quality;
Calling means for calling voice communication toward the communication network side device;
Voice signal transmission means for transmitting the voice signal for voice quality measurement to the communication network side device together with the call;
The communication network side device is:
Sound source file storage means for storing a sound source file of an audio signal for measuring audio quality;
Voice signal receiving means for receiving a voice signal for voice quality measurement transmitted from the communication terminal device;
Recording means for recording the audio signal received from the communication terminal device;
Recording file storage means for storing a recording file of the audio signal recorded by the recording means;
The audio signal of the sound source file and the audio signal of the recording file are compared, and based on the comparison result, in the upstream direction from the communication terminal device to the communication network side device via the cellular mobile communication network A voice quality measurement system comprising: voice quality calculation means for calculating an evaluation value of voice quality of voice communication. The voice quality measurement system according to any one of claims 1 to 5,
Transmission of the audio signal of the sound source file is performed based on a call for a call from the communication terminal device to the voice communication destination via the communication network,
The call from the communication terminal apparatus to the voice communication destination is performed after receiving the first call including the telephone number of the communication network side apparatus and the voice signal for measuring the voice quality from the communication network side apparatus. Alternatively, the voice quality measurement system is performed separately for a second call including the telephone number of the voice communication destination after the voice signal for voice quality measurement is transmitted to the communication network side device. The voice quality measurement system according to any one of claims 1 to 5,
Transmission of the audio signal of the sound source file is performed based on a call for a call from the communication terminal device to the voice communication destination via the communication network,
The call from the communication terminal device to the voice communication destination includes the telephone number of the communication network side device and the telephone number of the voice communication destination,
When the communication network side device receives a call from the communication terminal device to the voice communication destination, the communication network side device temporarily holds the transfer of the call, and the voice quality from the communication network side device to the communication terminal device After detecting the end of transmission of the measurement voice signal or after detecting the end of transmission of the voice signal for measuring the voice quality from the communication terminal device to the communication network side device, the communication terminal device sends the voice communication destination. A voice quality measurement system characterized by starting to transfer a call to The voice quality measurement system of claim 1,
The communication terminal device
Sound source file storage means for storing a sound file of a ringing tone that can be used as an audio signal for measuring voice quality;
Calling means for making a call to a voice communication destination toward the exchange;
A ringing tone receiving means for receiving a ringing tone signal transmitted from the exchange based on a call to the voice communication destination;
Recording means for recording a ringing tone received from the exchange;
Recording file storage means for storing a recording file of the ringing sound recorded by the recording means;
Voice quality calculation means for comparing the ring tone of the sound source file and the ring tone of the recording file, and calculating an evaluation value of the voice quality based on the comparison result,
The exchange provided in the communication network is:
A call receiving means for receiving a call to the voice communication destination;
A voice quality measurement system comprising: a ringing tone transmission unit that transmits a signal of the ringing tone to the communication terminal device based on a call made to the voice communication destination. The voice quality measurement system of claim 1,
A service providing apparatus having a database in which a plurality of types of ringing tones that can be selected and set for each communication terminal apparatus or each user of the communication terminal apparatus are connected to an exchange provided in the communication network; and voice quality A server for managing information,
The communication terminal device
Sound source file storage means for storing a sound source file of the ringing sound used as an audio signal for measuring voice quality;
Calling means for making a call to a voice communication destination toward the exchange;
Voice signal receiving means for receiving a ringing tone signal transmitted from the exchange based on a call to the voice communication destination;
Recording means for recording a ringing tone received from the exchange;
Recording file storage means for storing a recording file of the ringing sound recorded by the recording means;
A voice quality calculation means for comparing a ring tone of the sound source file and a ring tone of the recording file, and calculating an evaluation value of the voice quality based on the comparison result;
A voice quality measurement system comprising: voice quality transmission means for transmitting the calculated voice quality evaluation value to the server. The voice quality measurement system of claim 1,
A service providing apparatus having a database in which a plurality of types of ringing tones that can be selected and set for each communication terminal apparatus or each user of the communication terminal apparatus are connected to an exchange provided in the communication network; and voice quality A server for managing information,
The communication terminal device
Calling means for making a call to a voice communication destination toward the exchange;
Voice signal receiving means for receiving a ringing tone signal transmitted from the exchange based on a call to the voice communication destination;
Recording means for recording a ringing tone received from the exchange;
A recording file transmission means for transmitting a recording file of a ringing sound recorded by the recording means to the server,
The server
Sound source file storage means for storing a sound source file of the ringing sound used as an audio signal for measuring voice quality;
Recording file receiving means for receiving the recording file from the communication terminal device;
Voice quality calculation means for comparing the ring tone of the sound source file with the ring tone of the recording file received from the communication terminal device, and calculating an evaluation value of the voice quality based on the comparison result, Voice quality measurement system. The voice quality measurement system according to any one of claims 8 to 10,
The voice quality calculation means determines whether the reception time of the voice signal of the ringing tone is equal to or longer than a predetermined time set in advance, and only when the reception time of the signal of the ringing sound is equal to or longer than the predetermined time, A voice quality measurement system characterized by calculating an evaluation value. A communication terminal device capable of wireless communication with the base station of a cellular mobile communication network including a base station and an exchange; and a communication network side device provided in a communication network including the cellular mobile communication network; A voice quality measurement system for measuring voice quality of voice communication via the cellular mobile communication network,
The communication network side device is:
During voice communication of a call between the communication terminal device and the voice communication destination, a voice signal recording file in which a voice signal transmitted from the voice communication destination to the communication terminal device is recorded, or the voice communication A sound source recording file storage means for storing a sound signal recording file created based on the sound data transmitted from the destination toward the communication terminal device as a sound source recording file of a sound signal for sound quality measurement;
A sound source recording file transmitting means for transmitting the sound source recording file of the audio signal to the communication terminal device,
The communication terminal device
Sound source recording file receiving means for receiving the sound source recording file of the audio signal from the communication network side device;
Recording means for recording a voice signal received from the voice communication destination during voice communication of a call with the voice communication destination;
A measurement target recording file storage means for storing a recording file of the audio signal recorded by the recording means as a measurement target recording file;
Compare the audio signal of the sound source recording file with the audio signal of the measurement target recording file, and based on the comparison result, from the communication network side device through the cellular mobile communication network to the communication terminal device A voice quality measurement system comprising: voice quality calculation means for calculating a voice quality evaluation value of voice communication in the downlink direction. A communication terminal device capable of wireless communication with the base station of a cellular mobile communication network including a base station and an exchange; and a communication network side device provided in a communication network including the cellular mobile communication network; A voice quality measurement system for measuring voice quality of voice communication via the cellular mobile communication network,
The communication terminal device
Recording means for recording a voice signal received from the voice communication destination during voice communication of a call with the voice communication destination;
A measurement target recording file transmission means for transmitting a recording file recorded by the recording means as a measurement target recording file to the communication network side device, and
The communication network side device is:
During voice communication of a call between the communication terminal device and the voice communication destination, a voice signal recording file in which a voice signal transmitted from the voice communication destination to the communication terminal device is recorded, or the voice communication A sound source recording file storage means for storing a sound signal recording file created based on the sound data transmitted from the destination toward the communication terminal device as a sound source recording file of a sound signal for sound quality measurement;
A measurement target recording file receiving means for receiving the measurement target recording file from the communication terminal device;
Compare the audio signal of the sound source recording file with the audio signal of the measurement target recording file, and based on the comparison result, from the communication network side device through the cellular mobile communication network to the communication terminal device A voice quality measurement system comprising: voice quality calculation means for calculating a voice quality evaluation value of voice communication in the downlink direction. A communication terminal device capable of wireless communication with the base station of a cellular mobile communication network including a base station and an exchange; and a communication network side device provided in a communication network including the cellular mobile communication network; A voice quality measurement system for measuring voice quality of voice communication via the cellular mobile communication network,
The communication network side device is:
A recording file of an audio signal obtained by recording an audio signal transmitted from the communication terminal device to the audio communication destination during audio communication of a call between the communication terminal device and the audio communication destination, or the communication terminal Recording target recording file storage means for storing a recording file of a voice signal created based on voice data transmitted from the apparatus to the voice communication destination as a recording target recording file of a voice signal for voice quality measurement;
A measurement target recording file transmission means for transmitting the measurement target recording file of the audio signal to the communication terminal device;
The communication terminal device
Measurement target recording file receiving means for receiving the measurement target recording file of the audio signal from the communication network side device;
Recording means for recording a voice signal to be transmitted to the voice communication destination during voice communication of a call with the voice communication destination;
Sound source recording file storage means for storing a recording file recorded by the recording means as a sound source recording file;
Compare the audio signal of the sound source recording file and the audio signal of the recording file to be measured, and based on the comparison result, from the communication terminal device to the communication network side device via the cellular mobile communication network A voice quality measurement system comprising: voice quality calculation means for calculating a voice quality evaluation value of voice communication in the uplink direction. A communication terminal device capable of wireless communication with the base station of a cellular mobile communication network including a base station and an exchange; and a communication network side device provided in a communication network including the cellular mobile communication network; A voice quality measurement system for measuring voice quality of voice communication via the cellular mobile communication network,
The communication terminal device
Recording means for recording a voice signal to be transmitted to the voice communication destination during voice communication of a call with the voice communication destination;
A sound source recording file transmitting means for transmitting a recording file recorded by the recording means to the communication network side device as a sound source recording file,
The communication network side device is:
A recording file of an audio signal obtained by recording an audio signal transmitted from the communication terminal device to the audio communication destination during audio communication of a call between the communication terminal device and the audio communication destination, or the communication terminal Recording target recording file storage means for storing a recording file of a voice signal created based on voice data transmitted from the apparatus to the voice communication destination as a recording target recording file of a voice signal for voice quality measurement;
Sound source recording file receiving means for receiving the sound source recording file from the communication terminal device;
Compare the audio signal of the sound source recording file and the audio signal of the recording file to be measured, and based on the comparison result, from the communication terminal device to the communication network side device via the cellular mobile communication network A voice quality measurement system comprising: voice quality calculation means for calculating a voice quality evaluation value of voice communication in the uplink direction. The voice quality measurement system according to any one of claims 12 to 15,
Conditions for specifying a voice quality measurement target in a voice signal transmitted and received in a voice communication of a call between the communication terminal device and a voice communication destination are set in advance,
A voice quality measurement system, wherein an evaluation value of the voice quality is calculated for a range of voice signals satisfying the condition. The voice quality measurement system according to any one of claims 1 to 16,
A voice quality measurement system, further comprising measurement result storage means for storing the calculated voice quality evaluation value. The voice quality measurement system of claim 17,
The measurement result storage means includes at least one information of the evaluation value of the voice quality, location information at the time of voice quality measurement of the communication terminal device, date and time information, communication carrier information, and communication quality information in the communication terminal device. Is stored in association with each other. The voice quality measurement system according to claim 17 or 18,
The measurement result storage means stores information indicating that the evaluation value of the voice quality could not be calculated instead of the evaluation value of the voice quality when the evaluation value of the voice quality could not be calculated. Voice quality measurement system. The voice quality measurement system according to any one of claims 17 to 19,
The measurement result storage means includes the voice quality evaluation value, the measurement target recording file used for calculating the voice quality evaluation value or identification information thereof, and the sound source recording file used for calculating the voice quality evaluation value. Alternatively, the voice quality measurement system is characterized by storing the identification information in association with each other.

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