JPS6386933A - Voice information transmission system - Google Patents

Abstract

PURPOSE:To allow a PB signal to pass through in a digital line which has used high efficiency voice CODE, by encoding a sound signal to a transmitting part, and thereafter, encoding and multiplexing the PB signal, and separating and decoding the sound signal and the PB signal in a receiving part. CONSTITUTION:When a sound signal or a PB signal 7 is inputted from a transmitting part, a high efficiency voice encoder 1 brings an input signal to a voice information compression of a high efficiency by a waveform encoding algorithm, or an analyzing and synthesizing algorithm, and inputs it as a voice encoding data 8 to a multiplexer 3. A PB receiver 2 detects the input signal and converts it to a PB character signal 9, and inputs the PB character signal 9 to the multiplexer 3. When a PB signal detecting signal 10 is inputted, the multiplexer 3 switches it to the PB character signal and outputs it to a digital line 11. A receiving side sees a decided bit S in the data which a separator has received, and inputs it to a voice decoder 5 or a PB generator 6.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a highly efficient audio C0D that compresses and transmits audio information.
The present invention relates to an EC (encoder/decoder, hereinafter referred to as CODEC), and particularly to an audio information transmission system that transmits a PB (button button, hereinafter referred to as pB) signal in the same manner as an audio signal.

[Conventional technology]

Conventionally, digital lines using high-efficiency voice C0DECi have been used to transmit PB signals other than voice signals, as shown in Figure 3.
It was prepared separately from the digital line that transmitted the doubled signal.

[Problem that the invention seeks to solve]

That is, if a PR multiplied signal, which is a signal other than an audio signal, is transmitted over a digital line using a high-efficiency voice C0DECi, the PB multiplied signal cannot necessarily be restored without errors when decoded. For this reason, a digital line for voice signals and a digital line for PB signals? Must be prepared separately.

Another disadvantage is that PB services (Sky touch-tone telephone, voicemail, etc.) using high-efficiency lines are not possible.

[Means for solving problems]

The audio information transmission system according to the present invention has a transmitting section that encodes an audio signal with high efficiency, a means that detects and encodes a PB multiple signal, and a multiplexer, and a receiving section that includes a separator and a multiplexer. , a means for decoding an audio signal, and a means for decoding a PB multiplied signal.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a data format for implementing the present invention.

Reference numeral 1 denotes a high-efficiency audio encoder, which has means for compressing and encoding audio signals. 2 is a PB receiver, which also has a function of detecting whether the input signal is a PB multiplied signal or not. 7 and 14 are audio signals or PB double signals.

When an audio signal or PB signal 7 is input from the transmitting side, the high-efficiency audio encoder 1 converts the input signal into a waveform encoding algorithm (for example, ADPCM, APC).

multi-pulse encoding method, etc.) or one-analysis synthesis algorithm (e.g., LPC, PARCOR, LSP method, etc.)
The audio information is compressed with high efficiency, and the result is input to the multiplexer 3 as audio encoded data 8.

The PB receiver 2 has eight bandpass filters inside, detects the input signal, converts it into a PB character signal 9, and inputs the PB character signal 9 to the multiplexer 3.

In addition, there are 9 types of PR receivers, for example, what is called a DTMF receiver.

Now, by adding a detection circuit to the PB receiver 2 to determine whether the input signal 7 is a PB multiplied signal, 9. When the PB multiple signal is detected, the PR multiple signal output signal 10 is input to the multiplexer 3. Multiplexer 3.

Normally, the audio encoded data 8 is output to the digital line 1, but when the PR signal detection signal 10 is input, the PB
The character signal 9 is switched to the character signal 9 and output to the digital line 11.

An example of the data format to be transmitted is shown in FIG.

The data is divided into frame periods (for example, 10 ma), and there is one judgment bit (indicated by s) in the data.
When S=0, it indicates audio signal data, and when S=1, it indicates PB signal data.

On the receiving side, the judgment bit S in the data received by the separator 4
When it is S-〇, the audio encoded data 1 is sent to the audio decoder 5.
Enter 2. On the other hand, when S=1, PB character data 13 is input to the PB generator 6.

When the audio encoded data 12 is input, the audio decoder 5 decodes it into an audio signal and outputs the audio signal 14. When audio encoded data 12 is not input.

Output becomes high impedance. PR generator 6
When the PB character data 13 is input, the PB double signal is decoded and the PB signal 14 is output.When the 4PB character data 13 is not input, the output becomes high impedance.

〔Effect of the invention〕

As explained above, the present invention has a means for highly efficiently encoding an audio signal, a means for detecting and encoding a PB multiple signal, and a multiplexer in a transmitter, and a separator and a multiplexer for encoding an audio signal in a receiver. By having means for decoding and means for decoding the PB multiplied signal.

In addition to voice signals, PR signals can be passed through digital lines using high-efficiency voice C0DE'i. Therefore, according to the present invention, it is possible to provide a complete PR service using a highly efficient line, which was previously impossible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention, FIG. 2 is an example of a transmission data format, and FIG. 3 is a conventional block diagram. 1... Audio encoder, 2... PB receiver, 3...
Multiple equipment, 4...Separator, 5...Audio decoder, 6
...PB generator. Figure 1 Challenge Figure 2 S-O; Sound, voice, language data I: PB signal data

Claims (1)

[Claims] 1. In a method for compressing and transmitting audio information, the transmitting section has means for highly efficient encoding of the audio signal, means for detecting and encoding the PB signal, and a multiplexer, and the receiving section has An audio information transmission system comprising a separator, means for decoding an audio signal, and means for decoding a PB signal.