JP6450066B2 - Wireless terminal device - Google Patents

Description

  The present invention relates to a wireless terminal device.

  The wireless terminal device includes a type including a first communication unit that performs wireless communication using a first communication method and a second communication unit that performs wireless communication using a second communication method different from the first communication method. is there.

Japanese Patent No. 5106696

  The wireless terminal device transmits a signal received by performing wireless communication in the first communication unit to another device and a signal received by performing a wireless signal in the second communication unit A second state of transmission to the device. In the wireless terminal device, when the switching unit for switching from the first state to the second state is realized by hardware, there is a possibility that noise is included in the audio signal when switching from the first state to the second state. is there.

  An object of this invention is to provide the radio | wireless terminal apparatus which made low possibility that the sound resulting from noise will be heard by a user, even when switching from a 1st state to a 2nd state.

  In the present invention, a first state in which a digital audio signal from a first audio path is transmitted to another device and a second state in which a digital audio signal from a second audio path is transmitted to the other device are implemented by hardware. A wireless terminal device comprising a switching unit for switching, wherein when the switching unit switches from the first state to the second state, the wireless terminal device receives the digital audio signal from the first audio path and the second The present invention relates to a wireless terminal device that uses both digital audio signals from an audio path as silence signals.

  The present invention also provides a first state in which a digital audio signal from a first audio path is transmitted to another device and a second state in which a digital audio signal from a second audio path is transmitted to the other device. The wireless terminal device includes a switching unit that switches by wear, and the wireless terminal device, when the switching unit switches from the first state to the second state, the digital audio signal from the first audio path and the The present invention relates to a wireless terminal device that uses both digital audio signals from a second audio path as predetermined sound signals.

  ADVANTAGE OF THE INVENTION According to this invention, even when switching from a 1st state to a 2nd state, the radio | wireless terminal apparatus which made low possibility that the sound resulting from a noise will be heard by a user can be provided.

It is a perspective view which shows the external appearance of the smart phone which concerns on one Embodiment. It is a front view which shows the external appearance of a smart phone. It is a rear view which shows the external appearance of a smart phone. It is a figure which shows an example of the home screen of a smart phone. It is a block diagram which shows the function of a smart phone. It is a block diagram which shows the detailed function of a smart phone. It is a figure for demonstrating an example in case a digital audio | voice signal is made into a silence signal.

An embodiment for carrying out the present invention will be described in detail with reference to the drawings.
Hereinafter, a smartphone will be described as an example of a wireless terminal device.

  The external appearance of the smartphone 1 according to the embodiment will be described with reference to FIGS. 1 to 3. As shown in FIGS. 1 to 3, the smartphone 1 has a housing 20. The housing 20 includes a front face 1A, a back face 1B, and side faces 1C1 to 1C4. The front face 1 </ b> A is the front of the housing 20. The back face 1 </ b> B is the back surface of the housing 20. The side faces 1C1 to 1C4 are side faces that connect the front face 1A and the back face 1B. Hereinafter, the side faces 1C1 to 1C4 may be collectively referred to as the side face 1C without specifying which face.

  The smartphone 1 includes a touch screen display 2, buttons 3A to 3C, an illuminance sensor 4, a proximity sensor 5, a receiver 7, a microphone 8, and a camera 12 on the front face 1A. The smartphone 1 has a camera 13 on the back face 1B. The smartphone 1 has buttons 3D to 3F and an external interface 14 on the side face 1C. Hereinafter, the buttons 3A to 3F may be collectively referred to as the button 3 without specifying which button.

  The touch screen display 2 includes a display 2A and a touch screen 2B. The display 2A includes a display device such as a liquid crystal display (Liquid Crystal Display), an organic EL panel (Organic Electro-Luminescence panel), or an inorganic EL panel (Inorganic Electro-Luminescence panel). The display 2A displays characters, images, symbols, graphics, and the like.

  The touch screen 2B detects contact of a finger, a stylus pen, or the like with respect to the touch screen display 2. The touch screen 2B can detect a position where a plurality of fingers, a stylus pen, or the like is in contact with the touch screen display 2.

  The detection method of the touch screen 2B may be any method such as a capacitance method, a resistive film method, a surface acoustic wave method (or an ultrasonic method), an infrared method, an electromagnetic induction method, and a load detection method. Hereinafter, for the sake of simplicity of explanation, a finger that the touch screen 2B detects contact with the touch screen display 2 or a stylus pen or the like may be simply referred to as a “finger”.

  The smartphone 1 determines the type of gesture based on the contact, contact position, contact time, or number of contacts detected by the touch screen 2B. The gesture is an operation performed on the touch screen display 2. The gesture discriminated by the smartphone 1 includes touch, long touch, release, swipe, tap, double tap, long tap, drag, flick, pinch in, pinch out, and the like.

  A touch is a gesture in which a finger contacts the touch screen display 2 (for example, a surface). The smartphone 1 determines a gesture in which a finger contacts the touch screen display 2 as a touch. The long touch is a gesture in which a finger contacts the touch screen display 2 for a predetermined time or more. The smartphone 1 determines a gesture in which a finger contacts the touch screen display 2 for a predetermined time or more as a long touch.

  A release is a gesture in which a finger leaves the touch screen display 2. The smartphone 1 determines a gesture in which a finger leaves the touch screen display 2 as a release. The swipe is a gesture that moves while the finger is in contact with the touch screen display 2. The smartphone 1 determines a gesture that moves while the finger is in contact with the touch screen display 2 as a swipe.

  A tap is a gesture for releasing following a touch. The smartphone 1 determines a gesture for releasing following a touch as a tap. The double tap is a gesture in which a gesture for releasing following a touch is continued twice. The smartphone 1 determines a gesture in which a gesture for releasing following a touch is continued twice as a double tap.

  A long tap is a gesture for releasing following a long touch. The smartphone 1 determines a gesture for releasing following a long touch as a long tap. The drag is a gesture for performing a swipe from an area where a movable object is displayed. The smartphone 1 determines, as a drag, a gesture for performing a swipe starting from an area where a movable object is displayed.

  The flick is a gesture that is released while the finger moves at high speed in one direction following the touch. The smartphone 1 determines, as a flick, a gesture that is released while the finger moves in one direction at high speed following the touch. Flick: Up flick that moves your finger up the screen, Down flick that moves your finger down the screen, Right flick that moves your finger right in the screen, Left flick that moves your finger left in the screen Etc.

  Pinch-in is a gesture that swipes in a direction in which a plurality of fingers approach each other. The smartphone 1 determines, as a pinch-in, a gesture that swipes in a direction in which a plurality of fingers approach each other. Pinch-out is a gesture that swipes a plurality of fingers away from each other. The smartphone 1 determines a gesture of swiping in a direction in which a plurality of fingers move away from each other as a pinch out.

  The smartphone 1 operates according to these gestures that are determined via the touch screen 2B. Therefore, operability that is intuitive and easy to use for the user is realized. The operation performed by the smartphone 1 according to the determined gesture differs depending on the screen displayed on the touch screen display 2.

  An example of a screen displayed on the display 2A will be described with reference to FIG. FIG. 4 shows an example of the home screen. The home screen may be called a desktop or a standby screen. The home screen is displayed on the display 2A. The home screen is a screen that allows the user to select which application to execute from among the applications installed in the smartphone 1. The smartphone 1 executes the application selected on the home screen in the foreground. The screen of the application executed in the foreground is displayed on the display 2A.

  The smartphone 1 can place an icon on the home screen. A plurality of icons 50 are arranged on the home screen 40 shown in FIG. Each icon 50 is associated with an application installed in the smartphone 1 in advance. When the smartphone 1 detects a gesture for the icon 50, the smartphone 1 executes an application associated with the icon 50. For example, when the smartphone 1 detects a tap on the icon 50 associated with the mail application, the smartphone 1 executes the mail application. Here, for example, the smartphone 1 interprets a gesture to a position (area) corresponding to the display position (area) of the icon 50 on the touch screen display 2 as an execution instruction of an application associated with the icon 50. .

  The icon 50 includes an image and a character string. The icon 50 may include a symbol or a graphic instead of the image. The icon 50 may not include either an image or a character string. The icons 50 are arranged according to a predetermined rule. A wallpaper 41 is displayed behind the icon 50. The wallpaper is sometimes called a photo screen or a back screen. The smartphone 1 can use any image as the wallpaper 41. For example, an arbitrary image is determined as the wallpaper 41 according to the setting of the user.

  The smartphone 1 can increase or decrease the number of home screens. For example, the smartphone 1 determines the number of home screens according to the setting by the user. When the smartphone 1 displays the home screen, even if there are a plurality of home screens, the smartphone 1 displays one selected from them on the display 2A.

  The smartphone 1 displays one or more locators on the home screen. The number of locators matches the number of home screens. The locator indicates the position of the currently displayed home screen. The locator corresponding to the currently displayed home screen is displayed in a manner different from other locators.

  In the example shown in FIG. 4, four locators 51 are displayed. This indicates that the number of home screens 40 is four. In the example shown in FIG. 4, the second symbol from the left is displayed in a manner different from other symbols. This indicates that the second home screen from the left is currently displayed.

  When the smartphone 1 detects a specific gesture while displaying the home screen, the smartphone 1 switches the home screen displayed on the display 2A. For example, when detecting a right flick, the smartphone 1 switches the home screen displayed on the display 2A to the left home screen. Further, when the smartphone 1 detects a left flick, the smartphone 1 switches the home screen displayed on the display 2A to the right home screen.

  A region 42 is provided at the upper end of the display 2A. In the area 42, a remaining amount mark 43 indicating the remaining amount of the rechargeable battery and a radio wave level mark 44 indicating the electric field strength of the communication radio wave are displayed. The smartphone 1 may display the current time, weather information, the application being executed, the type of the communication system, the status of the phone, the mode of the device, the event that has occurred in the device, and the like in the area 42. As described above, the area 42 is used for various notifications to the user. The area 42 may be provided on a screen different from the home screen 40. The position where the region 42 is provided is not limited to the upper end of the display 2A.

  Note that the home screen 40 shown in FIG. 4 is an example, and the form of various elements, the arrangement of various elements, the number of home screens 40, the manner of various operations on the home screen 40, and the like are described above. It does not have to be street.

  FIG. 5 is a block diagram illustrating the configuration of the smartphone 1. The smartphone 1 includes a touch screen display 2, a button 3, an illuminance sensor 4, a proximity sensor 5, a first communication unit 6A, a second communication unit 6B, a receiver 7, a microphone 8, a storage 9, First controller 10, cameras 12 and 13, external interface 14, acceleration sensor 15, orientation sensor 16, rotation detection sensor 17, sound processing unit 18, first switch 19, amplifier 60, DSP (Digital Signal Processor) 70.

  As described above, the touch screen display 2 includes the display 2A and the touch screen 2B. The display 2A displays characters, images, symbols, graphics, or the like. The touch screen 2B detects a gesture.

  The button 3 is operated by the user. The button 3 includes buttons 3A to 3F. The first controller 10 detects an operation on the button by cooperating with the button 3. The operation on the button is, for example, click, double click, push, and multi-push.

  For example, the buttons 3A to 3C are a home button, a back button, or a menu button. For example, the button 3D is a power on / off button of the smartphone 1. The button 3D may also serve as a sleep / sleep release button. For example, the buttons 3E and 3F are volume buttons.

  The illuminance sensor 4 detects illuminance. For example, the illuminance is light intensity, brightness, luminance, or the like. The illuminance sensor 4 is used for adjusting the luminance of the display 2A, for example.

  The proximity sensor 5 detects the presence of a nearby object without contact. The proximity sensor 5 detects that the touch screen display 2 is brought close to the face, for example.

The first communication unit 6A and the second communication unit 6B communicate wirelessly.
The first communication method used by the first communication unit 6A is a wireless communication standard. For example, as a wireless communication standard of the first communication method, there is a cellular phone communication standard such as 3G or 4G. For example, communication standards for cellular phones include LTE (Long Term Evolution), W-CDMA, CDMA2000, and the like. Other wireless communication standards for the first communication method include, for example, WiMAX (Worldwide Interoperability for Microwave Access), IEEE 802.11, Bluetooth (registered trademark), IrDA, NFC (Near Field Communication), and the like. The first communication unit 6A may support one or more of the communication standards described above.

  The second communication method used by the second communication unit 6B is a communication method different from the first communication method, and is a wireless communication standard. For example, there is a cellular phone communication standard such as 2G as a wireless communication standard of the second communication method. For example, cellular phone communication standards include PDC, GSM (registered trademark), PHS (Personal Handy-phone System), and the like. The second communication unit 6B may support one or more of the communication standards described above.

The receiver 7 and the microphone 8 as the voice input / output unit are connected to the voice processing unit 18 via the first switch 19.
The receiver 7 outputs the audio signal transmitted from the audio processing unit 18 as audio. The microphone 8 converts the voice of the user or the like into a voice signal and transmits the voice signal to the voice processing unit 18. The audio processing unit 18 performs predetermined audio processing according to the control of the first controller 10 and outputs the processed signal to the receiver 7. The audio processing unit 18 outputs the audio signal input from the microphone 8 to the first controller 10.

Furthermore, the receiver 7 and the microphone 8 are connected to the second communication unit 6 </ b> B via the first switch 19 and the amplifier 60.
The receiver 7 outputs an analog audio signal transmitted from the second communication unit 6B as audio. The microphone 8 converts a user's voice into an analog voice signal and transmits the analog voice signal to the second communication unit 6B. The amplifier 60 amplifies the audio signal according to the control of the second communication unit 6B, and outputs the processed signal to the receiver 7. The amplifier 60 amplifies the signal input from the microphone 8 and outputs the processed signal to the second communication unit 6B.
The smartphone 1 may further include a speaker in addition to the receiver 7. The smartphone 1 may further include a speaker instead of the receiver 7.

  The storage 9 stores programs and data. The storage 9 is also used as a work area for temporarily storing the processing result of the first controller 10. The storage 9 may include any storage device such as a semiconductor storage device and a magnetic storage device. The storage 9 may include a plurality of types of storage devices. The storage 9 may include a combination of a portable storage medium such as a memory card and a storage medium reading device.

  The programs stored in the storage 9 include an application executed in the foreground or the background and a control program that supports the operation of the application. For example, the application displays a predetermined screen on the display 2A, and causes the first controller 10 to execute processing according to the gesture detected by the touch screen 2B. The control program is, for example, an OS. The application and the control program may be installed in the storage 9 via wireless communication or a storage medium by the first communication unit 6A or the second communication unit 6B.

  The storage 9 stores, for example, a control program 9A, a mail application 9B, a browser application 9C, and setting data 9Z. The mail application 9B provides an electronic mail function for creating, transmitting, receiving, and displaying an electronic mail. The browser application 9C provides a WEB browsing function for displaying a WEB page. The table 9D stores various tables such as a key assignment table. The arrangement pattern database 9E stores arrangement patterns such as icons displayed on the display 2A. The setting data 9Z provides various setting functions related to the operation of the smartphone 1. For example, the setting data 9Z stores a first parameter and a second parameter for adjusting the sound quality of the audio signal. Here, the first parameter and the second parameter include parameters for volume adjustment, frequency characteristic change, automatic gain control, echo cancellation, and noise suppression, respectively. In addition, you may have these parameters separately in each of several call states, such as a normal call and an earphone call. Further, it may be provided separately in each individual state, such as when recording, reproducing a recorded message, or outputting a key operation sound.

  The control program 9A provides functions related to various controls for operating the smartphone 1. The control program 9A realizes a call by controlling the first communication unit 6A, the second communication unit 6B, the receiver 7, the microphone 8, and the like, for example. The function provided by the control program 9A includes a function of performing various controls such as changing information displayed on the display 2A according to a gesture detected via the touch screen 2B. Note that the functions provided by the control program 9A may be used in combination with functions provided by other programs such as the mail application 9B.

  The first controller 10 controls the operation of the smartphone 1 to realize various functions.

  Specifically, the first controller 10 implements various functions by executing instructions included in a program stored in the storage 9 while referring to data stored in the storage 9 as necessary. . The first controller 10 may change the control according to the detection results of various detection units such as the touch screen 2B, the button 3, and the acceleration sensor 15.

  The first controller 10 executes various controls such as changing information displayed on the display 2A according to a gesture detected via the touch screen 2B by executing the control program 9A, for example.

  The camera 12 is an in-camera that captures an object facing the front face 1A. The camera 13 is an out camera that captures an object facing the back face 1B.

  The external interface 14 is a terminal to which another device is connected. The external interface 14 may be a general-purpose terminal such as USB (Universal Serial Bus), HDMI (registered trademark) (High-Definition Multimedia Interface), light peak (thunderbolt), and earphone microphone connector. The external interface 14 may be a dedicated terminal such as a dock connector. Devices connected to the external interface 14 include, for example, an external storage, a speaker, and a communication device.

  The acceleration sensor 15 detects the direction and magnitude of acceleration acting on the smartphone 1. The direction sensor 16 detects the direction of geomagnetism. The rotation detection sensor 17 detects the rotation of the smartphone 1. The detection results of the acceleration sensor 15, the orientation sensor 16, and the rotation detection sensor 17 are used in combination in order to detect changes in the position and orientation of the smartphone 1.

  The DSP 70 as a signal processing unit performs sound quality improvement processing on the digital audio signal received from the second communication unit 6B and provides the second audio unit 6B with the sound quality improvement processing. The sound quality improvement processing includes processing such as frequency correction and noise removal, for example.

  The smartphone 1 configured as described above can realize a call using each of a plurality of communication units corresponding to a voice call. A specific configuration will be described below.

FIG. 6 is a block diagram showing detailed functions of the smartphone 1.
In the figure, the transmission path of the voice signal related to voice communication is indicated by a solid arrow, and the path of the control signal is indicated by a broken arrow.

The first communication unit 6A includes a first antenna 61A and a first RF circuit unit 61B.
The first antenna 61A performs wireless communication with an external device such as a base station using the first communication method described above. Specifically, the first antenna 61A transmits / receives a high-frequency signal modulated by the first RF circuit unit 61B to / from an external device such as a base station. For example, the high frequency signal includes an audio signal related to a call.

  The first RF circuit unit 61B processes a high-frequency signal transmitted and received by the first antenna 61A. Specifically, the first RF circuit unit 61B demodulates the signal received by the first antenna 61A by a predetermined demodulation method, and supplies the demodulated signal to the first controller 10. The first RF circuit unit 61B modulates the signal supplied from the first controller 10 with a predetermined modulation method, and supplies the modulated signal to the first antenna 61A.

  For example, the first RF circuit unit 61B demodulates (converts) an audio signal received by the first antenna 61A, and then acquires a digital audio signal of a predetermined method (for example, linear PCM method). The first RF circuit unit 61B supplies the digital audio signal of this predetermined method to the first controller 10. Further, when a digital audio signal of a predetermined system is supplied from the first controller 10, the first RF circuit unit 61B modulates this signal and supplies it to the first antenna 61A.

  The first controller 10 can convert the linear PCM digital audio signal supplied from the first RF circuit unit 61B into a μ-law PCM audio signal. In addition, the first controller 10 can supply the converted μ-law PCM audio signal to the short-range wireless communication unit 90 via the second switch 80.

The second communication unit 6B includes a second antenna 62A, a second RF circuit unit 62B, and a second controller 63.
The second antenna 62A performs wireless communication with an external device such as a base station using the second mobile communication method described above. Specifically, the second antenna 62A transmits and receives a high-frequency signal modulated by the second RF circuit unit 62B with an external device such as a base station. For example, the high frequency signal includes an audio signal related to a call.

  The second RF circuit unit 62B processes a high-frequency signal transmitted and received by the second antenna 62A. Specifically, the second RF circuit unit 62B demodulates the signal received by the second antenna 62A by a predetermined demodulation method, and supplies the demodulated signal to the receiver 7 via the amplifier 60 and the first switch 19. . The second RF circuit unit 62B modulates the signal supplied from the microphone 8 via the first switch 19 and the amplifier 60 by a predetermined modulation method, and supplies the modulated signal to the second antenna 62A.

  For example, the second RF circuit unit 62B acquires a digital audio signal of a predetermined method (for example, μ-law PCM method) by demodulating (converting) the audio signal received by the second antenna 62A. The second RF circuit unit 62B performs processing such as volume adjustment and outputs the digital audio signal of this predetermined method. Further, when a digital audio signal of a predetermined method is supplied, the second RF circuit unit 62B modulates and supplies the modulated signal to the second antenna 62A.

  Also, the second RF circuit unit 62B performs sound quality improvement such as frequency correction and noise removal by the DSP 70 before supplying the digital audio signal to the first switch 19 or the short-range wireless communication unit 90. The digital signal supplied from the second RF circuit unit 62B to the short-range wireless communication unit 90 may be supplied to the short-range wireless communication unit 90 via the DSP 70, or the short-range wireless communication unit without passing through the DSP 70. 90 may be supplied.

  The digital audio signal of the predetermined system described above is, for example, a μ-law PCM system or a linear PCM system. The digital audio signal output from the first controller 10, the digital signal supplied to the first controller 10, the digital signal output from the second RF circuit unit 62B, and the digital signal supplied to the second RF circuit unit 62B are the same. This is a digital audio signal of the system.

  The smartphone 1 a includes a second switch 80 as a switching unit in addition to the first switch 19. The second switch 80 is configured by hardware. The second switch 80 switches between the following first state and second state. The first state is a state in which a digital audio signal from the first audio path is transmitted to another device. The second state is a state in which the digital audio signal from the second audio path is transmitted to another device. The other device is, for example, a Bluetooth (registered trademark) headset that communicates with the smartphone 1a via the short-range wireless communication unit 90 described later.

  The first audio path described above is one of the path of the digital audio signal output from the first communication unit 6A and the path of the digital audio signal output from the second communication unit 6B. The second audio path is the other path of the path of the audio signal output from the first communication unit 6A and the path of the audio signal output from the second communication unit 6B.

  As an example, when a digital audio signal is transmitted between the first communication unit 6A and the short-range wireless communication unit 90, the digital audio signal is transmitted between the second communication unit 6B and the short-range wireless communication unit 90. When the transmission path is changed so as to be transmitted, the second controller 63 of the second communication unit 6B transmits a request signal requesting the first controller 10 to change the transmission path. When receiving the request signal, the first controller 10 transmits a control signal for changing the transmission path, that is, for switching the state, to the second switch 80. When receiving the control signal, the second switch 80 changes the transmission path.

  As an example of switching the state, since there is an incoming call on the second communication unit 6B side when a call is made using the first communication unit 6A, the first communication unit 6A is used. This is a case where the call is ended and the call is switched to the call using the second communication unit 6B.

  The smartphone 1 includes a short-range wireless communication unit 90. The short-range wireless communication unit 90 performs communication based on a predetermined communication standard. The predetermined communication standard is, for example, Bluetooth (registered trademark). The short-range wireless communication unit 90 communicates with, for example, a headset as an audio signal input / output device. Thereby, a hands-free call becomes possible.

  When performing a hands-free call, the second switch 80 transmits a digital voice signal between the first communication unit 6A and the short-range wireless communication unit 90 in the case of voice communication by the first communication unit 6A. On the other hand, in the case of voice communication by the second communication unit 6B, the second switch 80 transmits a digital voice signal between the second communication unit 6B and the short-range wireless communication unit 90. As described above, the second switch 80 switches the transmission path of the audio signal, so that the smartphone 1b can realize a hands-free call using each of the communication units of a plurality of communication methods.

  The short-range wireless communication unit 90 transmits a digital audio signal of a predetermined method. The digital audio signal of a predetermined system is, for example, a μ-law PCM system or a linear PCM system. For example, when the first RF circuit unit 61B (first controller 10) and the second RF circuit unit 62B transmit μ-law PCM digital audio signals, the short-range wireless communication unit 90 includes the first RF circuit unit 61B (first 1 controller 10) or the second RF circuit section 62B and a μ-law PCM digital audio signal are transmitted. For example, when the first RF circuit unit 61B (first controller 10) and the second RF circuit unit 62B transmit linear PCM digital audio signals, the short-range wireless communication unit 90 includes the first RF circuit unit 61B (first The controller 10) or the second RF circuit unit 62B and a linear PCM digital audio signal are transmitted.

  When the wireless terminal device 1 is switched from the first state to the second state by the second switch 80, both the digital audio signal from the first audio path and the digital audio signal from the second audio path are made silent signals. . As described above, the first state is a state in which the digital audio signal from the first audio path is transmitted to the short-range wireless communication unit 90. As described above, the second state is a state in which the digital audio signal from the second audio path is transmitted to the short-range wireless communication unit 90. The silent signal is a signal for communicating with the short-range wireless communication unit 90, for example, for preventing sound from being output from the headset. That is, the silent signal is a mute signal.

  FIG. 7 is a diagram for explaining an example in which a digital audio signal is a silent signal. FIG. 7 shows a digital audio signal transmitted between the first communication unit 6A and the short-range wireless communication unit 90 from a state where the digital audio signal is transmitted between the second communication unit 6B and the short-range wireless communication unit 90. The case where it switches to the state which is transmitted is illustrated. Here, a state in which a digital audio signal is transmitted between the second communication unit 6B and the short-range wireless communication unit 90 is referred to as an A state. A state in which a digital audio signal is transmitted between the first communication unit 6A and the short-range wireless communication unit 90 is a B state.

  First, in the A state, digital audio signals (PCM_IN, PCM_OUT) are transmitted based on a clock signal (CLK: 384 kHz as an example) and a synchronization signal (FRAME SYNC: 8 kHz as an example). When switching from the A state to the B state, when the digital audio signal is not transmitted based on the fact that the clock signal and the synchronization signal are not output from the first controller 10 and the second controller 63, the first controller 10 controls A signal is supplied to the second switch 80 to switch from the A state to the B state. When switching to the B state, a digital audio signal is transmitted based on a clock signal (for example, 128 kHz) and a synchronization signal. Note that the frequency of the clock signal and the frequency of the synchronization signal are not limited to the above-described numerical values.

In the above example, switching from the A state to the B state has been described. However, when switching from the B state to the A state, digital audio signals are not transmitted.
As a result, when the digital audio signal is not transmitted, the first state is switched to the second state. For example, the headset connected to the short-range wireless communication unit 90 does not output noise (sound) based on the switching. become. Therefore, even when the wireless terminal device 1 is switched from the first state to the second state, it is possible to reduce the possibility that the user will hear a sound caused by noise.

In the embodiment described above, when switching from the first state to the second state, the wireless terminal device 1 uses the digital audio signal as a silent signal. However, the present invention is not limited to the above-described embodiment.
That is, the wireless terminal device 1 has a first state in which the digital audio signal from the first audio path is transmitted to another device and a second state in which the digital audio signal from the second audio path is transmitted to the other device. A switching unit for switching by hardware is provided. Here, the other device is, for example, a Bluetooth (registered trademark) headset that communicates with the smartphone 1a via the short-range wireless communication unit 90 described later. The switching unit is the second switch 80. When the wireless terminal device switches from the first state to the second state by the second switch 80, both the digital audio signal from the first audio path and the digital audio signal from the second audio path are predetermined. It is a sound signal. The predetermined sound signal is, for example, a single sound signal.

  When switching from the first state to the second state, the first communication unit 6A, for example, in order to output a predetermined sound from a headset connected to the short-range wireless communication unit 90, the short-range wireless communication unit A predetermined sound signal is output to 90. Further, when switching from the first state to the second state, the second communication unit 6B, for example, in order to output a predetermined sound from a headset connected to the short-range wireless communication unit 90, the short-range wireless A predetermined sound signal is output to the communication unit 90.

  Thereby, the wireless terminal device 1 can output a predetermined sound based on the sound signal from the headset, for example, and can hide the sound caused by the noise by the predetermined sound. That is, even when the wireless terminal device 1 is switched from the first state to the second state, it is possible to reduce the possibility that the user will hear sound due to noise.

  In order to fully and clearly disclose the present invention, it has been described with respect to characteristic embodiments. However, the invention according to the appended claims should not be limited to the above-described embodiments, and all modifications that can be created by those skilled in the art within the scope of the basic matters shown in this specification. And should be configured to embody alternative configurations.

  In the above-described embodiment, the sound quality improvement process is performed by the DSP 70, but the second RF circuit unit 62B itself may perform the sound quality improvement process on the audio signal input from the second antenna 62A. According to this configuration, the DSP 70 is unnecessary depending on the processing capability of the second RF circuit unit 62B, and the number of components is reduced.

For example, each program shown in FIG. 5 may be divided into a plurality of modules or may be combined with other programs.
5 may be downloaded from an external device by wireless communication using the first communication unit 6A or the second communication unit 6B. 5 may be stored in a storage medium that can be read by a reading device included in the storage 9. 5 is stored in a storage medium such as a CD, DVD, or Blu-ray (registered trademark) that can be read by a reader connected to the external interface 14. May be stored.

  Moreover, although the said embodiment demonstrated the smart phone as an example of a wireless terminal device, a wireless terminal device is not limited to a smart phone. For example, the wireless terminal device may be a mobile electronic device such as a mobile phone, a portable personal computer, a digital camera, a media player, an electronic book reader, a navigator, or a game machine. The wireless terminal device may be a stationary electronic device such as a desktop personal computer or a television receiver.

1 Smartphone (wireless terminal device)
80 Second switch (switching unit)

Claims (1)

A first communication unit that performs wireless communication with an external device using the first mobile communication method;
A second communication unit for performing wireless communication with the external device by a second mobile communication method;
A switching unit that switches, by hardware, a first state in which a digital audio signal from the first audio path is transmitted to another device and a second state in which the digital audio signal from the second audio path is transmitted to the other device; A wireless terminal device comprising:
The first audio path is one of a path of a digital audio signal output from the first communication unit and a path of a digital audio signal output from the second communication unit, and the second audio path The path is the other of the path of the audio signal output from the first communication unit and the path of the audio signal output from the second communication unit,
The other device performs short-range wireless communication with the wireless terminal device by a communication method different from the first mobile communication method and the second mobile communication method,
The wireless terminal, when switching from said first state to said second state by the switching unit, the predetermined PCM mode from the signal and the second voice path of a predetermined PCM mode from the first voice path A wireless terminal device that sets both of the signals to 1.

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