JPH0470136A - Signaling transmission control system - Google Patents

Abstract

PURPOSE:To easily execute required setting by setting switch between an in-slot transmission system and an out-slot transmission system for the unit of a line under the control of a software. CONSTITUTION:Corresponding to the instruction of a microprocessor 1, a pulse is generated to show the timing of in-slot transmission. On the side of an encoder part 3, a sound data is encoded with the various number of bits corresponding to the presence/absence of this pulse and when this pulse is generated, a signaling data is multiplexed to the sound data. On the side of a decoder part 6, the multiplexed signaling data is separated from the sound data and corresponding to this pulse, the sound data is decoded corresponding to the various number of bits. Then, the in-slot transmission system and the out-slot transmission system are switched under the software control of the microprocessor 1. Thus, the in-slot transmission system and the out-slot transmission system can be set while being mixed in the system.

Description

[Detailed Description of the Invention] [Summary] Regarding the signaling transmission method, it is possible to set the switching between the in-slot transmission method and the out-slot transmission method on a per-line basis, and the switching setting in this case can be set by software. The purpose of the present invention is to provide a signaling transmission control method that can be controlled by a microprocessor. an encoding unit that encodes audio data according to the number of bits; a multiplexing unit that multiplexes signaling data to the audio data when the pulse is generated; and a multiplexing unit that separates the multiplexed signaling data from the audio data in accordance with the pulse. and a decoding unit that decodes the audio data in accordance with the number of focuses depending on the pulse, and switches between in-slot transmission and out-slot transmission under software control in the microprocessor. Configure.

[Industrial application field]

The present invention relates to a method of transmitting signaling, and in particular,
The present invention relates to a signaling transmission control system for controlling switching between in-slot and out-slot transmission of signaling in a kbps compression encoded audio transmission system and the like.

In recent years, as the quality of voice transmission has improved, signaling transmission methods have been shifting from conventional in-slot transmission to out-slot transmission. For this reason, it is thought that the out-slot transmission method will become mainstream in the future in audio transmission systems, but even in that case, it will be necessary to be able to communicate with the existing in-slot transmission system.

Therefore, it is necessary to be able to switch and set the out-slot transmission function and in-slot transmission function, and in this case, it is necessary to be able to set the switching between in-slot and out-slot using software control. requested.

[Conventional technology]

In conventional compression-encoded audio transmission systems, the in-slot transmission function and out-slot transmission function of signaling could only be set on a system-by-system basis. Moreover, in this case, the only setting method for switching between in-slot and out-slot was to use hardware, so the degree of freedom was not very great and it was also inconvenient to use.

[Problem to be solved by the invention]

Therefore, it is not possible to mix in-slot transmission methods and out-slot transmission methods on a line-by-line basis within the system.
In most cases, for example, only the in-slot transmission method was used.

The present invention aims to solve the problems of the prior art as described above, by making it possible to set the switching between the in-slot transmission method and the out-slot transmission method on a line-by-line basis, and to change the settings for switching in this case. It is an object of the present invention to provide a signaling transmission control method that allows necessary settings to be easily made by performing settings under software control.

[Means to solve the problem]

As shown in the principle structure of the present invention in FIG. 1, a pulse generator 2 generates a pulse indicating the timing of in-slot transmission in accordance with an instruction from a microprocessor 1. On the encoding side, the encoding unit 3 encodes the audio data with a different number of bits depending on the presence or absence of this pulse,
The multiplexer 4 multiplexes signaling data with the audio data when the pulse is generated. On the decoding side, the decoding unit 5 separates the multiplexed signaling data from the audio data in response to this pulse, and the decoding unit 6 decodes the audio data in accordance with different numbers of bits in response to this pulse. become Then, switching between in-slot transmission and out-slot transmission is performed by software control in the microprocessor 1.

Further, the present invention further provides that the encoding unit 3 encodes the audio data consisting of the PCM signal into an n-1 bit or n-bit ADPCM signal depending on the presence or absence of this pulse, and the decoding unit 4 n-1 bits or n
It decodes a bit ADPCM signal into audio data consisting of a PCM signal.

[Operation] A pulse indicating the timing of in-slot transmission is generated in accordance with instructions from the microprocessor 1.

On the encoding side, audio data is encoded with a different number of bits depending on the presence or absence of this pulse, and signaling data is multiplexed with the audio data when this pulse occurs. On the decoding side, the multiplexed signaling data is separated from the audio data in response to this pulse, and the audio data is decoded in correspondence with different numbers of bits in response to this pulse. Since switching between in-loft transmission and out-slot transmission is performed by software control in the microprocessor 1, it is possible to set switching between the in-loft transmission method and out-slot transmission method on a line-by-line basis. It becomes possible to mix and set slot transmission methods in the system.

In this case, the encoder 3 responds to the presence or absence of this pulse by
Audio data consisting of a CM signal is encoded into an n-1 pinto or n-bit ADPCM signal, and the decoding unit 6 encodes an n-1 bit or n-bit AD PCM signal depending on the presence or absence of this pulse.
The PCM signal may be decoded into audio data consisting of the PCM signal.

〔Example〕

FIG. 2 shows the configuration of an embodiment of the present invention.

In the figure, 11 is a compression encoder, and a 64 kbps P
The CM signal is encoded into a 32 kbps ADPCM signal. A decoder 12 decodes the 32 kbps ADPCM signal into a 64 kbps PCM signal. Reference numeral 13 denotes a multiplexing unit that multiplexes signaling data into audio data. 14 is a separation unit that separates signaling data from voice data. 15
A delay unit 16 is provided to compensate for a delay occurring in the compression encoder 11 or the decoder 12 with respect to the input of the multiplexer 130 or the output of the demultiplexer 14, respectively.

A microprocessor 17 generates data instructing the bit steal timing according to the setting of in-slot transmission or out-slot transmission. 18
is a register that holds instructions from the microprocessor 17.

Reference numeral 19 denotes a pulse generator, which generates a pulse corresponding to the timing of embedding signaling in the voice code according to the instruction value held in the register 18.

3(a) and 3(b) show the signals of each part in the embodiment of FIG. 2, where (a) shows the operation on the encoding side, and (b) shows the operation on the decoding side. It shows. In the figure, words without hatching are 4-bit encoded ADPCM
A partially shaded word indicates a 3-bit encoded ADPCM signal.

On the encoding side, as shown in FIG. 3(a), when the pulse generator 19 generates pulses at the timing of words #1 and #8 in a 64kPCM signal, for example, according to the settings from the microprocessor 17, a compressed code is generated. The encoded output of encoder 11 is 3-bit ADPCM encoded at that position, and 4-bit ADPCM encoded at other parts.

In the multiplexing unit 13, the 4th bit is set to "L" or "H" according to the "L" or "H" of the signaling data input SOT for the 3-pill-ADPCM encoded word in the 32k ADPCM signal output. ” signaling bit is inserted and output.

On the decoding side, the separation unit 14 outputs 32kADPCM
Signaling bits are extracted from the word corresponding to the output pulse of the pulse generator 19 at the signal input, and the “L”
” or “H” is generated.

In addition, in the word corresponding to the output pulse of the pulse generator 19 in the 32 kADPCM signal input, 3 bits A
Decodes DPCM code to 64kPCM signal, and decodes 4-bit ADPCM code to 64kPCM signal in other frames.
Decode into M signal.

In the present invention, the timing of pit steal is controlled by the pulse generator 19 based on the settings from the microprocessor 17, so the degree of freedom in settings is increased.
It is also possible to automatically set in-slots and out-slots based on timetables. For example, when trying to realize a Time-of-day function that sets the car position according to the timetable for one day, settings that do not require manual intervention are required. is valid.

FIG. 4 shows a specific configuration example of the present invention,
A 32 kbps compression encoded audio disc is shown. In the figure, the same components as those shown in FIG. The decoder LS122 is a device in which the decoder 12, the separation section 14, and the delay section 16 are combined into one IC. 23
is a gate and constitutes a pulse control section of the pulse generation section. 24 is a flip-flop (or latch), which corresponds to the register 18;

When setting out-slot transmission, the steady pulse output from the pulse generator 19 is masked by the gate 23, so the Korg LS I 21. The decoder LSI 22 is not supplied with pit steal timing, so a 4-bit encoded ADPCM signal is always transmitted and received. On the other hand, when in-slot transmission is set, a pit steal pulse is supplied to each LSI once every 8 words, so 3-pill ADPCM encoding is performed at that timing, and signaling data is placed in the lowest pit of that word. embedded.

〔Effect of the invention〕

As explained above, according to the present invention, switching between the in-slot transmission method and the out-slot transmission method can be set for each line, and the in-slot transmission method and the out-slot transmission method can be set to coexist in the system. It becomes possible to do so. In addition, since the settings are software controlled, the Time-of automatically sets according to the timetable.
This has the effect of enabling the -day function. Therefore, by constructing a network using such a device, it will greatly contribute to improving the functionality of the 32 kbps compression encoded audio transmission system and the like.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the basic configuration of the present invention, FIG. 2 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 3(a). (b) is a diagram showing signals of various parts in the embodiment of FIG. 2, and FIG. 4 is a diagram showing a specific configuration example of the present invention. 1 is a microprocessor, 2 is a pulse generator, 3 is an encoder, 4 is a multiplexer, 5 is a demultiplexer, and 6 is a decoder.

Claims (2)

[Claims] (1) A pulse generator (2) that generates a pulse indicating the timing of in-slot transmission in response to instructions from the microprocessor (1), and a code that encodes audio data with a different number of bits depending on the presence or absence of the pulse. a multiplexing unit (4) that multiplexes signaling data with the audio data when the pulse is generated; and a separating unit (5) that separates the multiplexed signaling data from the audio data in response to the pulse. ) and a decoding unit (6) that decodes the audio data in accordance with the number of bits that differ according to the pulse, and the microprocessor (
1) A signaling transmission control method characterized in that switching between in-slot transmission and out-slot transmission is performed by software control. (2) The encoding unit (3) encodes audio data consisting of a PCM signal into an n-1 bit or n-bit ADPCM signal depending on the presence or absence of the pulse, and the decoding unit (
6) is n-1 bits or n depending on the presence or absence of the pulse.
2. The signaling transmission control system according to claim 1, wherein the ADPCM signal of bits is decoded into audio data consisting of a PCM signal.