JPH0546129B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical field to which the invention pertains The present invention relates to a signaling system for transmitting a voice line signaling signal in a transmission device that multiplexes and transmits a mixture of low-speed data and voice signals over a high-speed digital line. The present invention relates to a signal transmission device.

Prior Art As a method for multiplexing a data signal into a 64 kb/s digital zero-order group signal, there is, for example, the X-50 multiplexing method recommended by CCITT. This is 2.4kb/s,
Low-speed data signals such as 4.8kb/s, 9.6kb/s, etc.
As shown in Figure 3, bit by bit is the unit.
1-bit frame bit F and status bit S before and after 6-bit data bits _D1 to _D6
is added to form a (6+2) envelope frame, and the envelope frame is 3.2 kb/s,
Convert multiple bearer signals to bearer signals with bearer speeds such as 6.4kb/s or 12.8kb/s.
This method multiplexes it into a 64kb/s digital signal.

On the other hand, it is well known that an audio signal is PCM encoded and transmitted as a 64 kb/s digital audio signal. Therefore, when transmitting a mixture of audio signals and data signals, it is most common to match at 64 kb/s.

However, in order to transmit a signaling signal of a 64 kb/s PCM encoded audio signal, for example,
In the PCM24 system, a multi-frame is constructed within a 1.54 Mb/s array of 24 64 kb/s PCM-encoded digital audio signals, and the least significant bit of the 8-bit PCM encoded signal in one frame is periodically A so-called in-channel signaling method is adopted in which bit-staying is carried out, and then a signaling signal is superimposed and transmitted. Also,
In the PCM30 system, a channel for transmitting signaling is defined within 2.048 Mb/s, and a so-called out-channel signaling transmission system is adopted. In any of the above methods, a signaling frame is assembled for signaling transmission, and if it is to be transmitted together with a data signal, it is necessary to construct two frames, one for data and one for signaling. Frame bits have the drawback of limiting the maximum effective information transmission capacity relative to the line speed.

OBJECT OF THE INVENTION The object of the invention is to solve the above-mentioned conventional drawbacks and
An object of the present invention is to provide a signaling signal transmission device that can transmit a signaling signal in a frame defined for data transmission.

Structure of the Invention The signaling signal transmission device of the present invention includes an audio signal converter that converts an audio signal into a 64 kb/s digital audio signal, and 6 data bits and 1 status bit that follow 1 frame bit. A data signal converter outputs a (6+2) envelope frame consisting of 3.2 kb/s, 6.4 kb/s, 12.8 kb/s, etc. as a bearer signal, and multiplexes the bearer signals output from a plurality of data signal converters. comprising a data multiplex converter that outputs a 64 kb/s data multiplex signal, and a mixing multiplex converter that multiplexes and outputs the outputs of one or more of the data multiplex converters and a plurality of the audio signal converters,
In a transmission device that transmits a mixture of data signals and digital audio signals, the signaling signals for six lines of the audio signals are made to correspond to the 6 data bits of the envelope frame to generate a 3.2 or 6.4 kb/s bearer signal. a signaling converter for converting and outputting the signals, the output of the signaling converter is input to the data multiplex converter, and the data multiplex converter multiplexes the outputs of the signaling converter and the data signal converter. It is characterized by being configured as follows.

Embodiments of the Invention Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a block diagram showing details of the signaling conversion section of the above embodiment. That is, the audio signals 10-1 to 10-j are each 64 kb/s.
The audio signal converter 9 converts into a PCM signal, inputs the data signals 5-1 to 5-i, and converts the data signals 5-1 to 5-i into 6 data bits D1 to D following the ₁ -bit frame bit F as shown in FIG. A (6+2) envelope frame consisting of ₆ and 1 status bit S is constructed, and this is divided into 3.2 kb/s, 6.4 kb/s,
The data signal converter 4 outputs a bearer signal of 12.8 kb/s, etc., and the signaling signal for 6 lines of the audio signal is made to correspond to the 6 data bits of the envelope frame signal (6+
2) Configure the envelope frame, 3.2 or
A signaling converter 2 that converts and outputs a 6.4 kb/s bearer signal, and data that multiplexes the bearer signals output from the signaling converter 2 and data signal converter 4 and outputs it as a 64 kb/s data multiplexed signal 8. It includes a multiplex converter 7 and a mixer multiplex converter 13 that multiplexes and outputs the outputs of the data multiplex converter 7 and the plurality of audio signal converters 9, and transmits a data signal and a PCM audio signal in a mixed manner.
The signaling signal for each voice signal is transmitted by each data bit of the bearer signal 3 output from the signaling converter 2. The bearer signal 3 has the same format as the bearer signals 6-1 to 6-i output from the data signal converter 4,
The output of the signaling converter 2 and the output of the data signal converter 4 are converted into 64kb/by data multiplex converter 7.
It is easy to multiplex into s digital signals.

FIG. 2 is a block diagram showing the configuration of the signaling converter 2. As shown in FIG. That is, the signaling signals 15-1 to 15-6 of the six audio lines are converted to logic levels by the level conversion circuits 16-1 to 16-6, and the signals are sent to the input terminals of the envelope conversion circuit 17.
Input into D ₁ to _{D 6} . Envelope conversion circuit 1
7 is controlled by the control clock 19 supplied from the envelope assembly/disassembly clock generation circuit 20.
An 8-bit envelope frame consisting of frame bits F, 6-bit data signals corresponding to the signaling signals of the six lines, and status bits S is assembled and output as a bearer signal 18.

Envelope assembly/disassembly clock generation circuit 20
is the bearer speed control signal 22 supplied from the outside.
control clocks 19 and 21 are output. When the sampling rate of the signaling signals 15-1 to 15-6 is 400Hz, the bearer rate of the bearer signal 18 is 3.2kHz.
The bearer signal speed when set to 800Hz is 6.4KHz. The sampling rate of the signaling signal is determined by the distortion distribution of the signaling signal, and the bearer rate is also determined thereby. On the other hand, a similar bearer signal 24 from the other party outputted from the data multiplex conversion section 7 is input to the shift register 23, and the shift register 23 performs envelope assembly/
The control clock 21 supplied from the decomposition clock generation circuit 20 outputs the clocks in parallel. Each of the 6-bit data signals output from the shift register 23 is latched by a latch circuit 25, converted to a signal level by level conversion circuits 26-1 to 26-6, and outputted as signaling signals 27-1 to 27-6. . In addition, in FIG. 1, the description of the receiving side circuit is omitted.

In this embodiment, the signaling signals 15-1 to 15-6 for six lines are converted into bearer signals that are the same as data signals in the (6+2) envelope frame format, and are sent to the data multiplex converter 7 in the same way as other low-speed data. Since the configuration is configured to perform multiplex transmission by using a voice line, when transmitting a mixture of voice and data signals, there is no need to assemble a two-frame frame for data and signaling, and the signaling signal of the voice line can be transmitted in a multiplex manner. It has the advantage that it can be easily multiplexed and transmitted in the same way as other low-speed data bearer signals.

Effects of the Invention As described above, in the present invention, the signaling signal of the voice line is
2) Since the configuration is configured to transmit in the envelope frame signal format, there is an effect that the signaling signal of the voice line and other low-speed data signals can be multiplexed and transmitted by the same data multiplex converter.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIG. 2 is a block diagram showing the configuration of the signaling conversion section of the above embodiment, and FIG. 3 is a configuration diagram of a (6+2) envelope frame. In the figure, 1-1 to 1-6: Signaling signal, 2: Signaling converter, 3, 6-1 to 6-
i, 18, 24: bearer signal, 4: data signal converter, 5-1 to 5-i: data signal, 7: data multiplex converter, 8: data multiplex signal, 9: audio signal converter, 10- 1 to 10-j: audio signal, 11
~1~11-j: Digital audio signal, 13: Mixing multiplex converter, 14: Mixing multiplex signal, 15-1~
15-6: Signaling signal, 16-1 to 16-
6: Level conversion circuit, 17: Envelope conversion circuit, 19, 21: Control clock, 20: Envelope assembly/disassembly clock generation circuit, 22: Bearer speed control signal, 23: Shift register, 25: Latch circuit, 26-1~ 26-6: Level conversion circuit, 27-1 to 27-6: Signaling signal.

Claims (1)

[Claims] 1. Consists of an audio signal converter that converts an audio signal into a 64 kb/s digital audio signal, and 6 data bits and 1 status bit following 1 frame bit (6+2) Envelope frame 3.2kb/s, 6.4kb/s,
A data signal converter outputs a bearer signal including a signal rate of 12.8kb/s, and multiplexes bearer signals output from multiple data signal converters to generate a 64kb/s signal.
a bit multiplex converter that outputs a data multiplexed signal of s, and a mixing multiplex converter that multiplexes and outputs the outputs of one or more of the data multiplex converters and a plurality of the audio signal converters; In a transmission device that transmits audio signals in a mixed manner, the signaling signals for 6 lines of the audio signals are made to correspond to the 6 data bits of the envelope frame to create a 3.2 kb/s or 6.4 kb/s bearer signal. A signaling signal transmission device comprising a signaling converter that converts and outputs the converted signal to the data multiplex converter.