JP6549322B2 - Audio data control apparatus, audio data transmitting apparatus, audio data transmitting and receiving method, and audio data transmitting program - Google Patents

Description

  The present invention relates to an audio data control device, an audio data transmission device, an audio data transmission and reception method, and an audio data transmission program.

In a club or the like that enjoys dance in accordance with music, it is required that the DJ select a music that matches the atmosphere of the floor and perform playback so that the sound does not break off. If the music playback is interrupted while on air, the atmosphere of the lively place will be calmed down, so it should be avoided.
According to the technique described in Patent Document 1, the amount of data stored in the buffer for storing music data supplied from the outside is monitored, and the amount of data stored in the buffer is cut off when the amount of data stored in the buffer becomes less than a predetermined amount. It is determined that the music is reproduced, the alternative content in the storage device is selected, and the alternative music is reproduced so that the reproduction of the music is not interrupted.

JP, 2014-10849, A

However, in the technique described in Patent Document 1, since a certain amount of music data is accumulated in the buffer, a time delay occurs in actual reproduction. For this reason, it is necessary to pre-read the music data stored in the buffer and monitor the amount of accumulated data, but when the operator performs a playback speed reduction such as scratch or cue, playback stop operation, etc. There is a problem that synchronization with processing can not be achieved.
In addition, in the case of selecting an alternative content in the storage device and reproducing the alternative music, since the compressed file is stored in the storage device, the compressed file must be reproduced, and the reproduction device There is a problem that it must be an essential configuration.

  It is an object of the present invention to prevent interruption of music reproduction with a simple structure, and to control reproduction, without requiring the reproduction apparatus as an essential configuration, an audio data control apparatus, an audio data transmission apparatus, audio data transmission / reception A method and an audio data transmission program are provided.

The audio data control apparatus of the present invention is
An audio data control apparatus communicably connected to an audio data transmitting apparatus for reproducing and transmitting audio data and receiving the audio data,
A determination information receiving unit that receives connection determination information that determines presence or absence of a connection abnormality with the audio data transmitting apparatus;
An audio data receiving unit for receiving the audio data;
An audio data output unit for outputting the audio data received by the audio data receiving unit to the outside;
A buffer for storing a part of audio data received by the audio data receiving unit in synchronization with the reception of the audio data receiving unit;
A connection failure determination unit that determines whether or not a connection failure with the audio data transmission device has occurred based on connection determination information superimposed on the audio data;
And a loop reproduction control unit that repeatedly reproduces the audio data stored in the buffer when the connection abnormality determination unit determines that the connection abnormality or the connection abnormality can be considered.

The audio data control apparatus of the present invention is
An audio data control apparatus communicably connected to an audio data transmitting apparatus for reproducing and transmitting audio data and receiving the audio data,
Connection determination information for determining the presence or absence of communication disconnection is superimposed on the audio data;
An audio data receiving unit for receiving the audio data;
A buffer for storing a part of audio data received by the audio data receiving unit in synchronization with the reception of the audio data receiving unit;
A connection failure determination unit that determines whether or not a connection failure with the audio data transmission device has occurred based on connection determination information superimposed on the audio data;
A loop reproduction control unit that repeatedly reproduces audio data stored in the buffer when it is determined by the connection abnormality determination unit that connection abnormality or connection abnormality can be considered;
It is characterized by having.

The audio data transmitting apparatus of the present invention is
An audio data transmitting apparatus communicably connected to an audio data control apparatus and transmitting reproduced audio data to the audio data control apparatus,
An audio data reproduction unit that reproduces compressed audio data;
A connection determination information superposition unit that superimposes connection determination information that determines the presence or absence of communication disconnection on the reproduced audio data;
An audio data transmission unit that transmits audio data on which connection determination information is superimposed by the connection determination information superposition unit;
It is characterized by having.

An audio data transmitting / receiving method performed between an audio data transmitting apparatus for transmitting reproduced audio data and an audio data control apparatus communicably connected to the audio data transmitting apparatus and receiving the audio data,
The audio data transmitting device
A procedure for playing back compressed audio data;
A procedure for superimposing connection determination information for determining the presence or absence of communication disconnection on reproduced audio data;
To carry out
The audio data control device
A procedure for receiving audio data on which the connection determination information is superimposed;
A procedure of determining whether or not a connection abnormality has occurred between the audio transmission device and the audio data control device based on the received connection determination information;
A procedure for repeatedly playing back part of the received audio data if it is determined that a connection error has occurred or can be regarded as a connection error;
To carry out.

  An audio data transmission program according to the present invention causes a computer to function as the above-described audio data transmission apparatus.

FIG. 1 is a schematic view illustrating a configuration of a sound control system according to an embodiment of the present invention. The functional block diagram of the acoustic control system in the said embodiment. The flowchart for demonstrating the effect | action in the said embodiment. FIG. 7 is a schematic view for explaining switching of audio data and loop reproduction data in the embodiment.

[1] Overall Configuration of Audio Data Control System 1 An audio data control system 1 according to an embodiment of the present invention is shown in FIG. The audio data control system 1 is a system that performs audio equipment control operation in DJ performance, and includes a DJ controller 2 as an example of an audio data control device, a computer 3 as an example of an audio data transmission device, and a speaker 4.
The DJ controller 2 is a main body of a DJ apparatus operated by the operator, and includes two player units 2A disposed on the left and right, and a mixer unit 2B disposed therebetween.

The player units 2A disposed on the left and right sides are portions operated by the operator to apply various acoustic effects to audio data to be reproduced, and include a jog dial 2C, a tempo slider 2D, and a performance pad 2E.
The jog dial 2C is a dial by which the operator operates the jog dial 2C to change the rotational speed. By operating the jog dial 2C, sound processing such as scratching and pitch bending can be performed on the music being reproduced.

The tempo slider 2D is a lever for adjusting the track reproduction speed of audio data stored in the computer 3.
The performance pad 2E is a button capable of instantaneously performing an effect process such as a loop, cue, slicer, sampler, or the like on the music data being reproduced by the operation of the operator.

The mixer unit 2B disposed at the center is a unit that adjusts the audio output and the effect processing of the left and right player units 2A, and includes four mixing units 2F to a mixing unit 2I.
From the respective mixing units 2F to the mixing units 2I, the two mixing units 2F and 2G on the left side are used to adjust the audio output and effect processing of the player unit 2A on the left side, and the two mixing units 2H and 2I on the right side are on the right It is used for the audio output adjustment of the player unit 2A and the adjustment of the effect processing.

The DJ controller 2 is connected to the computer 3 via a cable 5 conforming to a USB (Universal Serial Bus) standard capable of bi-directional communication. The cable 5 does not have to be limited to one conforming to the USB standard, and may be one conforming to another standard. Furthermore, not only wired connection but also wireless communication connection is possible. Good.
Also, the DJ controller 2 is connected to the speaker 4 via the analog cable 6.

The computer 3 includes a storage device 31 (see FIG. 2) such as a hard disk, and the audio data AD1, AD2, AD3,... Of MP3 stored in the storage device 31 is converted by the decoder 32 into audio data consisting of serial data. The signal is reproduced and output to the DJ controller 2 via the cable 5.
The audio data reproduced by the computer 3 is output to the DJ controller 2 through the cable 5, and effects are applied based on the effect processing performed by the operator operating the DJ controller 2, and converted to analog data Then, the audio data is output to the speaker 4 through the analog cable 6 and audio data on which the operator's operation has been performed is output as audio.

[2] Functional block configuration of audio data control system 1
A functional block diagram of the audio data control system 1 is shown in FIG.
The computer 3 includes a storage device 31, a decoder 32, an audio data transmission unit 33, and a connection determination information superposition unit 34 as an audio data transmission program executed on the arithmetic processing unit.
The storage device 31 is a storage medium such as a hard disk, and stores a plurality of audio data AD1, AD2, AD3. The audio data AD1, AD2, AD3... Are stored in a compressed state, and are, for example, compressed files of the MP3 (MPEG-1 Audio Layer 3) format.

The decoder 32 exemplified as an audio data reproduction unit reproduces the MP3 file and converts it into digital audio data AD1, AD2, AD3.
The audio data transmission unit 33 transmits the audio data AD1, AD2, AD3... Reproduced by the decoder 32 to the DJ controller 2 via the cable 5.
The connection determination information superimposing unit 34 superimposes connection determination information on the audio data AD1, AD2, AD3... Reproduced by the decoder 32. Specifically, the connection determination information superimposing unit 34 superimposes the packets to which the flag information is added on the audio data AD1, AD2, AD3... Formed of a plurality of packets, thereby forming a series of serial data. In the flag information, flags such as “1” in the case of normal connection and “2” in the case of abnormal connection may be superimposed at predetermined intervals, and flag information may be superimposed only in the case of abnormal connection. Furthermore, the connection determination information may be determined not in the concept of flag information, but in a state where it can be regarded as abnormal connection. For example, the connection determination may be made based on the presence or absence of transmission of the reproduced audio data itself, or based on the presence or absence of transmission of the additional information added to the MP3 file.

The DJ controller 2 includes an audio data reception unit 21, an audio data output unit 22, a buffer 23, a tempo analysis unit 24, a reproduction operation control unit 25, a loop reproduction control unit 26, and a connection abnormality determination unit 27.
The audio data receiving unit 21 receives audio data transmitted from the computer 3 and outputs the audio data to the audio data output unit 22. Further, the audio data receiving unit 21 stores a part of the received audio data in the buffer 23 as loop reproduction data.
Specifically, the audio data receiving unit 21 synchronizes with the timing of receiving by the audio data receiving unit 21 and outputting it to the audio data output unit 22, for example, for one measure of the audio data AD1, AD2, AD3. Are stored in the buffer 23 as loop reproduction data.

The audio data output unit 22 converts the audio data AD1, AD2, AD3 ... output from the audio data receiving unit 21 into analog data, outputs the analog data to the analog cable 6, and causes the speaker 4 to output sound.
The tempo analysis unit 24 analyzes the tempo of the audio data received by the audio data reception unit 21. Specifically, the tempo analysis unit 24 performs LPF (Low Pass Filter) processing on the received audio data, detects a sound pressure level signal equal to or higher than a predetermined threshold, and detects the sound pressure level signal based on the detected sound pressure level signal. , BPM (Beat Per Minute) is calculated and tempo analysis is performed.
During playback of the audio data AD1, AD2, AD3, ..., a characteristic section such as an intro section characterizing the audio data AD1, AD2, AD3 ..., an A melody section, a B melody section, a rust section, an outlo section is expanded and the tempo changes In this case, the tempo analysis unit 24 stores in the buffer 23 the audio data AD1, AD2, AD3... Of one bar after the change in the buffer 23 as loop reproduction data.

  When the operator operates the jog dial 2C, the tempo slider 2D, the performance pad 2E, etc., the reproduction operation control unit 25 performs effect processing according to the operation and outputs it to the audio data output unit 22 as a reproduction operation control signal. The audio data output unit 22 performs effect processing based on the reproduction operation control signal from the reproduction operation control unit 25 to convert audio data from a digital format to an analog format signal.

The loop reproduction control unit 26 outputs audio data of the loop reproduction data stored in the buffer 23 when a connection abnormality occurs between the computer 3 and the DJ controller 2 and the audio data reception unit 21 can not receive audio data. By outputting to the unit 22 and repeatedly reproducing the loop reproduction data, it is possible to prevent interruption of the sound outputted from the speaker 4.
Further, when the reception of the audio data in the audio data receiving unit 21 is resumed, the loop reproduction control unit 26 outputs the audio data from the output of the loop reproduction data on condition that the operator operates the predetermined switch of the DJ controller 2. It switches to the output of the audio data received by the receiving unit 21. The loop reproduction control unit 26 may be configured to automatically switch from loop reproduction data to audio data, triggered by the resumption of reception of audio data by the audio data receiving unit 21.

The connection abnormality determination unit 27, which also functions as a determination information reception unit, receives the connection determination information transmitted from the computer 3, and determines whether or not the connection abnormality has occurred. The connection abnormality determination unit 27 determines that the connection abnormality has occurred based on at least one of whether the flag information has changed, the flag information has been received, and the audio data has not been received, and the result is loop playback control Output to section 26. Note that, in the present embodiment, the connection abnormality determination unit 27 receives the connection determination information superimposed on the audio data AD1, AD2, AD3 ... but the present invention is not limited to this, and the audio data AD1, AD2, AD3 ... Alternatively, the connection abnormality determination unit 27 may be configured to receive connection determination information transmitted from the computer 3 separately.
The loop reproduction control unit 26 outputs the loop reproduction data in the buffer 23 using the abnormality determination of the connection abnormality determination unit 27 as a trigger. In addition, as a case where a connection abnormality occurs, a decoding error of the decoder 32, an erroneous operation of the DJ controller 2, a disconnection of the cable 5, a terminal dropout, an abnormal end of the computer 3 or the like can be considered.

[3] Operation and Effects of the Embodiment Next, the audio data transmitting and receiving method of the present invention will be described based on the flowchart shown in FIG.
When the operator operates the computer 3 to select the audio data AD1, AD2, AD3... In the storage device 31 and starts playing the selected audio data AD1, AD2, AD3. The audio data AD1, AD2, AD3... Selected from 31 are called, and the reproduction of the audio data AD1, AD2, AD3... Is started (step S1).

The connection determination information superimposing unit 34 superposes connection determination information on the reproduced audio data AD1, AD2, AD3... At a predetermined timing (step S2).
The audio data transmission unit 33 transmits the audio data AD1, AD2, AD3... On which the connection determination information is superimposed to the DJ controller 2 via the cable 5 (step S3).
The audio data receiving unit 21 of the DJ controller 2 receives the audio data AD1, AD2, AD3... Transmitted from the computer 3 (step S4), and outputs the audio data to the audio data output unit 22 (step S5). At this time, the audio data receiving unit 21 loop-reproduces part of the audio data AD1, AD2, AD3... For one bar in the buffer 23 in synchronization with the output timing of the audio data AD1, AD2, AD3. It stores as data (procedure S6).

The audio data output unit 22 performs effect processing on the audio data AD1, AD2, AD3, ... based on the effect processing output from the reproduction operation control unit 25, performs digital-to-analog conversion, and outputs analog audio from the speaker 4 Is output (step S7).
The connection abnormality determination unit 27 receives the connection determination information superimposed on the audio data AD1, AD2, AD3 ... transmitted from the computer 3 (step S8), and determines whether or not a connection abnormality has occurred (step S9). ).
If there is no connection abnormality, the procedure is repeated from step S1.

When it is determined that the connection abnormality has occurred, the connection abnormality determination unit 27 outputs an error code to the loop reproduction control unit 26. The loop reproduction control unit 26 switches to the loop reproduction data in the buffer 23, outputs it to the audio data output unit 22, and reproduces the loop reproduction data (step S10).
The connection abnormality determination unit 27 determines whether or not the connection determination information has returned to normal (step S11), and if it is determined that the normal reception of the audio data AD1, AD2, AD3,. Repeat loop playback data playback.

When it is determined that the audio data AD1, AD2, AD3 ... has been restored to normal reception, the loop reproduction control unit 26 inputs an instruction to restore the audio data by the operation of the DJ controller 2 operator. It is determined (step S12).
If a command to restore is not input, loop playback is maintained, and if a command to return is input, the process returns to step S1 and resumes playback of audio data.

Here, the reason that such a step S12 is interposed is, as shown in FIG. 4, the tempo T1 when the audio data AD1, AD2, AD3,... Are output, and the loop playback data stored in the buffer 23. Tempo T2 is synchronized, so they are in agreement. Therefore, the audio data AD1, AD2, AD3... Can be smoothly switched to the reproduction of loop reproduction data.
On the other hand, when the loop reproduction data is restored to the audio data AD1, AD2, AD3, ..., the tempo T3 at the start of restoration of the audio data AD1, AD2, AD3 ... does not necessarily coincide with the tempo T2 of the loop reproduction data. For this reason, when switching to the audio data AD1, AD2, AD3... Restored from the tempo T1 of the loop reproduction data, the tempo becomes out of order, which makes the user feel uncomfortable.
Then, the operator checks the restored audio data AD1, AD2, AD3... By monitor headphones connected to the DJ controller 2 and performs switching processing to match the tempo T2 of the loop reproduction data.
Thereby, it is possible to perform the switching process without a sense of incongruity.

According to this embodiment, only by providing a simple functional means such as the connection abnormality judging unit 27 in the DJ controller 2, when the audio data AD1, AD2, AD3... You can easily switch to
Since part of the audio data AD1, AD2, AD3... Received by the audio data receiving unit 21 is stored in the buffer 23 as loop reproduction data, the DJ controller 2 does not need a decoder. Can be simplified.

DESCRIPTION OF SYMBOLS 1 ... Audio data control system, 2 ... DJ controller, 2A ... Player part, 2B ... Mixer part, 2C ... Jog dial, 2D ... Tempo slider, 2E ... Performance pad, 2F ... Mixing part, 2G ... Mixing part, 2H ... Mixing part , 2I ... mixing unit, 3 ... computer, 4 ... speaker, 5 ... cable, 6 ... analog cable, 21 ... audio data receiving unit, 22 ... audio data output unit, 23 ... buffer, 24 ... tempo analysis unit, 25 ... reproduction Operation control unit 26: Loop playback control unit 27: Connection abnormality determination unit 31: Storage device 32: Decoder 33: Audio data transmission unit 34: Connection determination information superposition unit AD1: Audio data AD2: Audio Data, AD3 ... Audio data, T1 ... Tempo, T2 Tempo, T3 ... tempo.

Claims (7)

An audio data control apparatus communicably connected to an audio data transmitting apparatus for reproducing and transmitting audio data and receiving the audio data,
And audio data receiving unit that receives the previous Symbol audio data,
An audio data output unit for outputting the audio data received by the audio data receiving unit to the outside;
A buffer for storing a part of audio data received by the audio data receiving unit in synchronization with the reception of the audio data receiving unit;
A determination information receiving unit that is transmitted from the audio data transmission device separately from the audio data and receives connection determination information that determines presence or absence of a connection abnormality with the audio data transmission device;
A connection abnormality determination unit that determines whether a connection abnormality with the audio data transmission device has occurred based on the connection determination information received by the determination information reception unit ;
An audio data characterized by comprising: a loop reproduction control unit which repeatedly reproduces audio data stored in the buffer when the connection abnormality determination unit determines that the connection abnormality or the connection abnormality can be considered. Control device. An audio data control apparatus communicably connected to an audio data transmitting apparatus for reproducing and transmitting audio data and receiving the audio data,
Connection determination information for determining the presence or absence of connection abnormality is superimposed on the audio data;
An audio data receiving unit for receiving the audio data;
An audio data output unit for outputting the audio data received by the audio data receiving unit to the outside;
A buffer for storing a part of audio data received by the audio data receiving unit in synchronization with the reception of the audio data receiving unit;
A connection failure determination unit that determines whether or not a connection failure with the audio data transmission device has occurred based on the connection determination information that is superimposed on the audio data and that is different from the audio data;
An audio data characterized by comprising: a loop reproduction control unit which repeatedly reproduces audio data stored in the buffer when the connection abnormality determination unit determines that the connection abnormality or the connection abnormality can be considered. Control device. In audio data controller according to 請 Motomeko 2,
The audio data control apparatus, wherein the connection determination information is flag information superimposed on the audio data at a predetermined timing. An audio data transmitting apparatus communicably connected to an audio data control apparatus and transmitting reproduced audio data to the audio data control apparatus,
An audio data reproduction unit that reproduces compressed audio data;
An audio data transmission unit for separately transmitting the audio data reproduced by the audio data reproduction unit and connection determination information in which the audio data control apparatus determines the presence or absence of a connection abnormality ;
An audio data transmission apparatus comprising: An audio data transmission program that causes a computer to function as the audio data transmission device according to claim 4 . Audio data transmitting / receiving method performed between an audio data transmitting apparatus for transmitting reproduced audio data and an audio data control apparatus communicably connected to the audio data transmitting apparatus and receiving the reproduced audio data There,
The audio data transmitting device
A procedure for playing back compressed audio data;
A procedure for separately transmitting the reproduced audio data and connection determination information for determining presence or absence of connection abnormality;
To carry out
The audio data control device
And procedures that before receiving the Kio over audio data,
A procedure for receiving the connection determination information transmitted separately from the audio data;
On the basis of the received connection determination information, a procedure for determining whether the connection error between the audio data transmitting apparatus and the audio data control device has occurred,
If it is determined that regarded as abnormal connection occurs or abnormal connection, the procedure for reproducing repeatedly a part of the received the audio data,
A method of transmitting and receiving audio data, characterized in that: Audio data transmitting / receiving method performed between an audio data transmitting apparatus for transmitting reproduced audio data and an audio data control apparatus communicably connected to the audio data transmitting apparatus and receiving the reproduced audio data There,
The audio data transmitting device
A procedure for playing back compressed audio data;
A procedure of superimposing connection determination information for determining presence or absence of connection abnormality on reproduced audio data;
To carry out
The audio data control device
And procedures that before receiving the Kio over audio data,
A procedure for receiving the connection determination information superimposed on the audio data and different from the audio data;
On the basis of the received connection determination information, a procedure for determining whether the connection error between the audio data transmitting apparatus and the audio data control device has occurred,
If it is determined that regarded as abnormal connection occurs or abnormal connection, the procedure for reproducing repeatedly a part of the received the audio data,
A method of transmitting and receiving audio data, characterized in that:

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