JPH10135863A - Radio communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize satisfactory radio communication by sending a background noise to a communication opposite party at the time of detecting a silence processing instructing signal so as to operate a VOX(voice operated transmission) without becoming unnatural, regardless of the kind of the terminal of the equipment of the opposite party. SOLUTION: At the time of detecting a VOX signal as voice processing information in control data received from a channel codec 122, the control part 130 of a base station 120 starts a background noise generating part 128, which is a circuit generating so-called white noise. Background noise data sent by the part 128 is inputted to a voice transmission processing part 127 and sent to a line 132 through a line interface 124. When a speech sending signal from the microphone 104 of a terminal 100 is silent, the terminal 100 stops transmitting radio waves to the base station 120 after the transmission of the VOX signal but background noise is sent from the base station to the speech opposite party.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a radio communication device.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a conventional radio telephone device.

[0003] Reference numeral 400 denotes a portable terminal such as a mobile phone, which includes a microphone 403, a receiver 402, an audio processing unit 404 to which they are connected, a background noise generation unit 401 for generating background noise, and audio from the microphone 403. A voice detection unit 406 for detecting whether the input is voiced or silent, a radio unit 405 for transmitting and receiving radio waves, and a control unit 4 for controlling the entire terminal.
07.

A base station 410 performs wireless communication with the terminal 400, and includes a wireless unit 411 for transmitting and receiving radio waves,
It comprises a signal processing unit 412 for performing signal conversion between the radio unit 411 and the line interface 413, a line interface 413 for performing operations on the line, and a control unit 414 for controlling the entire base station.

In such a configuration, when the terminal 400 is in a call with the partner terminal via the base station 410 and the line 415, if the sound input to the microphone 403 of the terminal 400 is interrupted, the sound detector 406 detects silence. I do. When the detection output is input, the control unit 407 sends a so-called VOX (Voice Operate) to the base station 410 via the wireless unit 405.
d Transmission) signal. VO
The terminal 400 that has transmitted the X signal enters a low power consumption mode such as temporarily stopping transmission of radio waves to save power. Upon receiving the VOX signal, base station 410 transmits the signal to line 415 via line interface 413 and notifies the other terminal.

On the other hand, the line 415
When the base station 410 receives the VOX signal via the wireless communication unit 411, the base station 410 transmits the signal via the wireless unit 411. The terminal 400
When a VOX signal is received, the background noise generation 401 operates to generate background noise and transmit it to the receiver 402.

That is, the conventional radio telephone apparatus is configured to receive a VOX signal when the other party is in a silent state, generate a background noise in the radio terminal on the VOX signal receiving side, and transmit the background noise to the receiver.

[0008]

However, in the above-described conventional example, the wireless telephone device in a silent state only transmits the VOX signal to the line, and the background noise is generated on the wireless terminal side receiving the VOX signal. In this case, it is necessary to operate so as to transmit the signal to the receiver.

[0009] The other party who communicates with the wireless telephone device via the line is not limited to the same type of wireless telephone device. That is,
In many cases, a telephone call with a general analog telephone terminal, an analog telephone device, a digital telephone terminal, a digital telephone device, or the like can be considered. Such a terminal or an apparatus does not have a function of receiving a VOX signal, and has no means for generating background noise.

In such a situation, during a call between a conventional wireless telephone device having the function of a VOX and a terminal or a device (a VOX non-compatible terminal) which does not support the VOX, a call is made.
When the OX function operates, the VOX non-compliant terminal or device is in a receiving mute state, that is, a completely silent state, and the feeling of a natural call is impaired, and a good call cannot be secured. In addition, the quality of the wireless telephone device is often reported as a trouble such as interruption of a call, and the reliability of the user is lost.

An object of the present invention is to provide a wireless communication device capable of operating a VOX function without causing unnaturalness and capable of excellent wireless communication regardless of the type of a terminal or device of a communication partner. It is in.

[0012]

In order to achieve the above object, according to the present invention, there is provided a receiving means for receiving a radio wave including a silence processing instruction signal transmitted from an accommodated wireless terminal, and receiving the radio wave received by the receiving means. Detecting means for detecting a silent processing instruction signal, generating means for generating background noise based on the detection result of the detecting means, and transmitting means for transmitting the background noise to a line via a communication path; When a signal is detected, background noise is transmitted to the other party.

In the above configuration, when a silent processing instruction signal is detected, an operation is performed such that background noise is generated on the line and transmitted to the line of the other party.

[0014]

FIG. 1 is a block diagram of a radio telephone apparatus embodying the present invention. In FIG. 1, reference numeral 100 denotes a portable terminal, for example, a portable telephone, a PHS (Personal Handy Phone System) terminal, and portable information. Tools. 1
Reference numeral 20 denotes a base station, which is connected to a network or a telephone exchange via a line 132. Terminal 100 and base station 120
Is performed by a digital wireless system typified by the TDMA / TDD system.

The terminal 100 includes a radio unit 115 for transmitting and receiving radio waves to and from the base station 120, a channel codec 114 for demultiplexing voice or control data in a time-division manner, a microphone 104 for inputting voice, and a microphone 104. Has an audio input processing unit 106 for performing analog / digital conversion of the audio signal. The voice input processing unit 106 is connected to the signal line 1
08, the channel codec 114 and the signal line 10
9 is connected to the voice detection unit 110.

Reference numeral 110 denotes a voice detection unit which detects the presence / absence of a voice signal, that is, the presence / absence of sound and no sound. An audio output processing unit 103 includes a channel codec 114 via a signal line 107, a background noise generation unit 117 via a signal line 118, and a receiver 101 via a signal line 102.
And performs digital / analog conversion of the audio signal from the channel codec 114. Reference numeral 112 denotes a control unit which controls the entire terminal 100 and the protocol control of wireless communication, and includes a background noise generation unit 117 and a voice detection unit 1
10, respectively, connected to the channel codec 114.

In the base station 120, a wireless unit 121 transmits and receives radio waves to and from the terminal 100. 122
Denotes a channel codec, which demultiplexes voice or control data in a time-division manner, and is connected to the radio unit 121, the voice reception processing unit 123, the voice transmission processing unit 127, and the control unit 130, respectively. Reference numeral 123 denotes an audio reception processing unit which performs code conversion (for example, ADPCM / PCM conversion) on the audio signal from the line interface 124 and sends the signal to the channel codec 122. Reference numeral 127 denotes an audio transmission processing unit, which performs code conversion on an audio signal from the channel codec 122 and sends it to the line interface 122.

Reference numeral 128 denotes a background noise generation unit, which is connected to the control unit 130 and the audio transmission processing unit 127, respectively. Reference numeral 124 denotes a line interface, which controls the operation of the line, and is connected to the audio reception processing unit 123, the audio transmission processing unit 127, and the control unit 130, respectively. 13
A control unit 0 controls the entire base station 120 and controls the wireless communication protocol and the line interface protocol, and is connected to the channel codec 122, the background noise generation unit 128, and the line interface 124, respectively.

The operation will be described below with reference to the flowchart of FIG. 2 based on the above configuration example.

<Operation on Terminal> During a call (S200), the transmission voice input from microphone 104 is transmitted through signal line 1.
The signal is input to the audio input processing unit 106 via the analog-to-digital converter 05 to perform analog / digital conversion. Here, the digital signal is converted into a 32 KbpS ADPCM code of a voice compression system represented by a mobile phone or a PHS, and is converted into a signal line 10.
8 to the channel codec 114. The audio signal converted into the ADPCM code by the audio input processing unit 106 is transmitted to the audio detection unit 110 via the signal line 109. The voice detection unit 110 sequentially calculates an input voice signal, and detects sound and silence. The detection result is sent to the control unit 112 via the signal line 111.

The control unit 112 monitors the detection result and, when detecting silence (S201), sends the information signal (VOX signal) to the channel codec 114 via the signal line 113.
Is sent. This is a so-called VOX signal. When the channel codec 114 receives the signal, it performs multiplexing processing and uses the VOX signal as control data as the radio unit 11.
5 Radio section 115 transmits the VOX signal as a radio wave (S202). When the transmission of the VOX signal is completed, the terminal 100 suspends the transmission of the radio wave and shifts to the low power consumption mode (S203).

Thereafter, when the voice detection unit 110 detects a sound, the detection signal is transmitted to the control unit 112 via the signal line 111. The control unit 112 receives the signal and determines whether there is sound (S204).
To send the information signal (VOX release signal) to the terminal. Upon receiving the signal, the channel codec 114 performs a multiplexing process and sends the multiplexed signal to the radio unit 115. Radio section 115 transmits the VOX release signal as a radio wave (S205).
When the transmission of the VOX release signal is completed, the terminal 100 resumes transmission of radio waves, releases the low power consumption mode, and resumes communication.

<Operation of Base Station> During a call (S210), the base station 120 receives the radio wave transmitted from the terminal 100 by the radio section 121,
Then, the audio data is separated into audio data and control data, and the audio data is transmitted to the audio transmission processing unit 127 via the signal line 125.
The control data is sent to the control unit 130 via the signal line 126. The voice transmission processing unit 127 receives the received ADPC
The audio data encoded by M is converted into PCM code and transmitted to the line interface 124 via the signal line 131. The line interface 124 converts the received PCM code voice data into a line 132, for example, a digital line such as an ISDN line or a digital leased line, or a digital / analog conversion in the case of an analog line, and transmits a voice signal from the terminal 100 to the other party. I do.

A voice signal from the other party is input to a voice reception processor 123 via a line interface 124, converted into an ADPCM code, and
22. The signal is multiplexed by the channel codec 122 and transmitted to the terminal 100 via the wireless unit 121.

In this state, when the control unit 130 detects a VOX signal as audio processing information in the control data received from the channel codec 122 via the signal line 126 (S211), the control unit 130 sets the background noise generation unit. Enable signal line 129 to activate 128. The background noise generation unit 128 is a circuit that generates so-called white noise. The background noise generation unit 128 includes a storage device in which digitally encoded white noise data is stored and reads out the data. A configuration in which digital conversion is performed and then transmitted is possible.

The digital noise transmitted from the background noise generator 128, here, PCM-coded background noise data is input to the audio transmission processor 127 via the signal line 134. The audio transmission processing unit 127 transmits the background noise data to the line interface 12 via the signal line 131.
4 and transmitted to the line 132 from here (S2
12).

Thereafter, when a VOX release signal is detected as audio processing information in the control data received by the control unit 130 from the channel codec 122 via the signal line 126 (S213), the control unit 130 disables the signal. The transmission of the background noise data is stopped (S214). As a result, the call is resumed (S215).

It should be noted that even if the other party has the VOX function, the other party outputs the background noise from the background noise generator 128 to the other party.

As described above, in this embodiment, the microphone 104
If the transmitted signal from is silent, after transmitting the VOX signal,
While the terminal 100 stops transmitting radio waves to the base station 120, the background noise is transmitted from the base station 120 to the communication partner from the background noise generator 128.

FIG. 3 is a block diagram showing another embodiment of the present invention.

100 is a terminal, 300 is a base station, and 302 is a telephone exchange.

The base station 300 includes a radio unit 121, a channel codec 122, a voice reception processing unit 123, a voice transmission processing unit 127, a line interface 124, and a control unit 1.
30. The exchange 302 accommodates a base station 300 via a line 132 and a digital telephone 315 via a line 308.

The exchange 302 is configured as follows. Reference numeral 303 denotes a digital subscriber line interface, which is connected to the line 132 and goes up the exchange
04, and to the control unit 314 via a signal line 309. A digital subscriber line interface 307 accommodates a digital telephone 315 via a line 308 and is connected to an exchange unit 305 via a downlink communication path 304. Reference numeral 313 denotes a background noise generating unit, and the switching unit 30
5 and to the control unit 314 via a signal line 311. An exchange unit 305 is connected to each unit. A control unit 314 controls the entire exchange.
It is connected to each part.

The VOX signal from the terminal 100 is transmitted to the base station 3
00 channel codec 122, signal line 126, control unit 130, signal line 133, line interface 124
And via the line 132 to the digital subscriber line interface 303 of the exchange 302. When a VOX signal is detected as voice processing information in the control data received by the control unit 314 from the digital subscriber line interface 303 via the signal line 309, the control unit 314 enables the signal line 311 and sets the background noise generation unit. 313 is started. Further, it controls the exchange unit 305 to control the communication paths 304 and 3.
06 is disconnected, and the communication paths 312 and 306 are connected. As a result, the background noise is transmitted to the digital telephone 3 via the digital subscriber line interface 307 and the line 308.
15 is sent.

Thereafter, when the control section 314 detects a VOX release signal from the terminal 100 on the same path as the above-described VOX signal, the control section 314 disables the signal line 311 and controls the switching section 305 to control the communication paths 312 and 306. The connection is disconnected, and the communication paths 304 and 306 are connected. As a result, the call is resumed.

[0036]

As described above, according to the present invention,
Since a silence processing instruction signal from the terminal is received and background noise can be inserted into the line to the other party, the VO signal can be output regardless of the type of terminal or the line type of the other party.
It is possible to provide a high-quality and high-performance wireless communication device that can generate natural background noise even during X control, does not become unnatural, and does not give a sense of anxiety to a communication partner.

[Brief description of the drawings]

FIG. 1 is a block diagram of a wireless telephone device according to a first embodiment of the present invention.

FIG. 2 is a flowchart of the wireless telephone device according to the first embodiment of the present invention.

FIG. 3 is a block diagram of a wireless telephone device according to a second embodiment of the present invention.

FIG. 4 is a diagram illustrating a conventional example.

[Explanation of symbols]

 Reference Signs List 100 terminal 110 voice detection unit 120 base station 128, 313 background noise generation unit 130, 314 control unit 127 voice transmission processing unit 305 switching unit 124 line interface 207 digital subscriber line interface

Claims (4)

[Claims] 1. A wireless communication device that performs wireless communication with a wireless terminal that transmits a silence processing instruction signal via radio waves when detecting silence, a receiving unit that receives a radio wave including a silence processing instruction signal,
Detecting means for detecting a silent processing instruction signal received by the receiving means, generating means for generating background noise based on the detection result of the detecting means, and transmitting means for transmitting the background noise to a line. A wireless communication device characterized by the following. 2. The method according to claim 1, wherein the silence processing instruction signal is VOX (Voi).
ce Operated Transmission)
The wireless communication device according to claim 1, wherein the wireless communication device is a signal. 3. A control method for a wireless communication device for performing wireless communication with a wireless terminal transmitting a silence processing instruction signal via radio waves when detecting silence, comprising: receiving a radio wave including a silence processing instruction signal; Detecting a silent processing instruction signal, generating background noise based on the detection result, and transmitting the background noise to a line. 4. The silence processing instruction signal is VOX (Voi
ce Operated Transmission)
4. The method according to claim 3, wherein the signal is a signal.