JPH04278757A - Device for transmitting voice data - Google Patents

Abstract

PURPOSE:To save power consumption at the reception side in the voice transmission of digital communication. CONSTITUTION:A device 5 detects the silence of a voice signal 10 so as to generate silence information 12 in the voice encoding device 3 of a base station 1 at the time of generating encoding voice data 11 from the voice signal 10. A transmitting device 4 transmits a silence code signal 14 as transmission data 15 from a silence generator 6 when silence information 12 is inputted. When a silence code detecting device 9 detects the silence code signal 14 at the time of receiving transmission data 16 in the receiving device 7 of a mobile station 2, silence information 18 is generated and transmitted to a voice decoding device 8. The device 8 stops the decoding of encoding voice data 17 received by silence information 18 and does not output a decoding voice signal 19. In this case, the device 8 stops an operation processing so as to save power consumption in the mobile station.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice data transmission device used in digital mobile communications and the like.

0002

2. Description of the Related Art FIG. 2 shows the configuration of a conventional audio data transmission device. In FIG. 2, 21 indicates a base station on the transmitting side, and 22 indicates a mobile station on the receiving side. Base station 2
1 includes a voice encoding device 23 and a transmitting device 24. The mobile station 22 includes a receiving device 25 and a voice decoding device 26.

Next, the operation of the above conventional example will be explained. The transmitted audio signal 27 is transmitted to the audio encoder 23 of the base station 21.
is converted into encoded audio data 28 by transmitting device 24
It is transmitted as transmission data 29 from .

[0004] In the mobile station 22, transmission data 30 received by a receiving device 25 is converted into encoded audio data 31, and then decoded by an audio decoding device 26 to generate an audio signal 32.

[0005] As described above, even in the conventional voice data transmission device, voice can be transmitted from a base station to a mobile station.

[0006]

[Problems to be Solved by the Invention] However, in voice encoding and decoding devices used for digital communication, encoding and
The large number of numerical operations involved in decoding must be processed at high speed using a DSP (digital signal processor), and when the DSP operates at high speed, the input clock must be made faster, which increases power consumption. There was a problem. Particularly in mobile communications, there has been a problem in that when power consumption in a DSP increases due to capacity limitations of storage batteries in mobile stations, call time and incoming call standby time become shorter.

SUMMARY OF THE INVENTION The present invention solves these conventional problems and aims to provide an audio data transmission device that can reduce power consumption.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides means for detecting silence in the speech to be encoded to generate silence information on the transmitting side, The receiving side is equipped with means for stopping audio decoding processing based on silence information.

[0009]

[Operation] Therefore, according to the present invention, when the receiving side detects audio silence information generated and transmitted by the transmitting side, the operating clock of the audio decoding device (DSP) is stopped or slowed down, thereby saving and reducing power consumption. It is possible to aim for
You can extend the call time and standby time for incoming calls.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the structure of an embodiment of the present invention. In FIG. 1, 1 is a base station on the transmitting side, and 2 is a mobile station on the receiving side. The base station 1 includes a voice encoding device 3 and a transmitting device 4. The speech encoding device 3 includes a voice/silence detection device 5 therein, and the transmitting device 4 includes a silence code generation device 6 therein. The mobile station 2 includes a receiving device 7 and a voice decoding device 8, and the receiving device 7 includes a silent code detecting device 9 therein.

Next, the operation of the above embodiment will be explained. When the voice encoding device 3 of the base station 1 encodes the voice signal 10 and transmits the encoded voice data 11, the voice/silence detection device 5 detects voice/silence, and detects voice/silence when there is no voice. Information 12 is generated and output to the transmitting device 4. When the transmitter 4 receives the silence information 12, it switches the switch 13 to transmit the silence code signal 14 generated by the silence code generator 6 as the transmission data 15, and if there is sound, the encoded audio data 11 is transmitted as the transmission data. Send as 15.

[0012] At the mobile station 2, the transmitted data 1
6 is received by the receiving device 7 and demodulated as encoded audio data, and the silent code detecting device 9 in the receiving device 7 detects whether or not the silent code signal 14 is included in the transmitted data 16. silence information 1 if
8 is generated and output to the audio decoding device 8. The audio decoding device 8 decodes the encoded audio data 17 to generate a decoded audio signal 19, and when silence information 18 is input, stops decoding the received encoded audio data 17, The decoded audio signal 19 is not output. When the audio decoding device 8 stops decoding audio due to the detection of the silence code signal 14, the clock supplied to the DSP (digital signal processor) of the audio decoding device 8 is stopped or switched to a low speed. , aiming to reduce power consumption.

As described above, according to the above embodiment, the voice/silence detection device 5 is added to the voice encoding device 3 of the base station 1 to detect silence, and in the case of silence, the transmitter 4 A silence code signal 14 is generated instead of the encoded voice data and transmitted to the mobile station 2, and the mobile station 2 detects this by installing a silence code signal detecting device 9 in the receiving device 7. In this case, the audio decoding device (D
It is possible to save power consumption by stopping or slowing down the operating clock of SP) 8.

[0014]

[Effects of the Invention] As is clear from the above embodiments, the present invention stops or slows down the operating clock of the audio decoding device (DSP) when the receiving side detects audio silence information generated and transmitted by the transmitting side. Therefore, power consumption can be reduced and call time and standby time can be extended. In telephone calls, both parties rarely speak at the same time, and voice is often transmitted in only one direction, so the effects of the present invention are significant.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of an audio data transmission device according to an embodiment of the present invention.

[Figure 2] Schematic block diagram of a conventional audio data transmission device

[Explanation of symbols]

1 Base station 2 Mobile station 3 Audio encoding device 4 Transmitting device 5 Sound/silence detection device 6 Silent code generator 7 Receiving device 8 Audio decoding device 9 Silent code detection device 10 Audio signal 11 Encoded audio data 12 Silence information 13 Switch 14 Silent code signal 15, 16 Transmission data 17 Encoded audio data 18 Silence information 19 Decoded audio signal

Claims (1)

[Claims] 1. A transmitting side is provided with means for detecting silence in speech to be encoded to generate silence information, and a receiving side is provided with means for stopping the speech decoding process based on the silence information sent from the transmitting side. Audio data transmission equipment equipped with.