JPH0427230A - Communication equipment for digital auxiliary signal - Google Patents

Abstract

PURPOSE:To sent the digital auxiliary signals of plural lines including a sound signal with a single transmission line by providing a time division multiplex circuit having a discriminator, a controller, a memory, a multiplexing circuit, and a separating circuit for separating the multiplexing. CONSTITUTION:Input signals including plural sound digital signals inputted from the digital auxiliary signal input terminal 1 of a transmission side are stored tentatively in a memory 2, and simultaneously, a discriminator 3 detects whether the input signal is present thereon or not. A control circuit 4A inputs this result and sends out a control signal to a memory 2A and a multiplexing circuit 5. In the case the discriminator 3 discriminates that the input signal is only one piece, its input signal is outputted as it is to a signal processing part 6. In the case it is discriminated that plural input signals are present thereon, its input signals are stored tentatively in the memory 2A and outputted to the circuit 6. In the circuit 5, in the case the sound digital signal is included in the input signal, a sound input port A and other data input ports B, C are multiplexed by an 8-bit unit and a bit unit, respectively as shown in a separate figure, and a time division multiplexing auxiliary signal is outputted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a communication device for digital auxiliary signals, and particularly in a communication device for transmitting digital auxiliary signals including audio digital signals, the present invention relates to a communication device for transmitting digital auxiliary signals including a digital audio signal. The present invention relates to a communication device for digital auxiliary signals that transmits a plurality of digital auxiliary signals using a channel.

[Conventional technology]

In the conventional digital auxiliary signal communication device, as shown in FIG. 2, multiple lines of input signals input to the digital auxiliary signal input terminal 1 on the transmitting side are transmitted through multiple transmission lines 9A for each digital auxiliary signal. The signal is used to be transmitted to the signal processing circuit 6. The signal processing circuit 6 transmits the signal to the multiplexed opposing station. Furthermore, the multiplexed signal input from the opposite station is separated into a plurality of auxiliary signals by the signal processing circuit 6, and sent to the outside from the digital auxiliary signal output terminal 8 using a plurality of transmission lines 9B for each digital auxiliary signal. be done.

[Problem to be solved by the invention]

In the conventional digital auxiliary signal communication device described above, it is necessary to prepare one digital auxiliary signal transmission line from each digital auxiliary signal input/output terminal to the signal processing circuit, so when there is no auxiliary signal input, , the disadvantage is that the transmission path becomes empty and the transmission capacity is wasted.

[Means to solve the problem]

The communication device for digital auxiliary signals of the present invention includes, on the transmission side, a discriminator that inputs a plurality of digital auxiliary signals in parallel and detects the presence or absence of the input auxiliary signals and whether the auxiliary signals are data or voice; a memory for storing a plurality of auxiliary signals; a multiplexing circuit for time-division multiplexing each signal string read out by the memory; and a plurality of auxiliary signals including audio digital signals based on the results of the discriminator. When a column input signal is determined, the audio digital signal is time-division multiplexed in 8-bit units, and other data signals are time-division multiplexed in 1-bit units. and a signal processing circuit that combines the main signal sent from the opposite station and the output signal of the multiplexing circuit into one frame, and the receiving side separates the main signal sent from the opposite station and the time division multiplexed auxiliary signal. The time division multiplexed auxiliary signal has a separation circuit and a memory circuit that separates and outputs a plurality of auxiliary signals.

〔Example〕

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

FIG. 1 is a block diagram of one embodiment of the present invention.

In FIG. 1, on the transmitting side, an input signal including a plurality of audio digital signals inputted from a digital auxiliary signal input terminal 1 on the transmitting side is temporarily stored in a memory 2, and at the same time, a discriminator 3 detects the presence or absence of a plurality of input signals. Detect. The control circuit 4A inputs this detection result and sends a control signal to the memory 2A and the multiplexing circuit 5 based on this information.
If the discriminator 3 detects only one input signal, that input signal is output as is to the signal processing section 6.

When the discriminator 3 detects that there are multiple input signals,
The input signal is temporarily stored in the memory 2A, multiplexed by the multiplexing circuit 5 without changing the transmission speed, and then multiplexed by the signal processing circuit 6.
is output to. At this time, if the multiplexing circuit 5 includes audio digital signals in the input signals of multiple columns, the multiplexing circuit 5
As shown in Figure 3(a), audio input port A is multiplexed in 8-bit units, and other data signals are multiplexed in bit units for data input ports B and C as shown in Figures 3(b) and (c). ,
A time division multiplexed auxiliary signal of output port Y as shown in FIG. 3(d) is output. Note that the control circuit 4A is refined to control the multiplexing circuit 5 based on the result of the discriminator 3. The signal processing circuit 6 processes the main signal and the time-division multiplexed auxiliary signal, which is the output of the multiplexing circuit 5, to refine one frame. At this time, a flag signal that serves as a mark is also inserted into the control bit in the frame when the auxiliary signal is multiplexed.

On the other hand, on the receiving side, the time division multiplexed auxiliary signal and the main signal sent from the opposite station are separated by the signal processing circuit 6, and furthermore, when the flag signal is sent to the control circuit 4B, the control circuit 4B The memory 2B and the separation circuit are controlled by the flag signal.

Thereby, a plurality of digital auxiliary signals separated from the memory 2B are sent to the digital auxiliary signal output terminal 8 according to the input state on the transmitting side.

〔Effect of the invention〕

As explained above, the present invention includes a discriminator, a controller, a memory,
By providing a time division multiplexing circuit system having a multiplexing circuit and a demultiplexing circuit for demultiplexing, it is possible to send multiple columns of digital auxiliary signals including audio signals through a single transmission path. Therefore, by effectively utilizing the transmission capacity, it is possible to multiplex transmit even more information.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a block diagram of a conventional digital auxiliary signal communication device, and FIG. It is a timing chart of the digital auxiliary signal of the embodiment. 1...Digital auxiliary signal input terminal, 2A, 2B...
・Memory, 3... Discriminator, 4A, 4B... Control circuit, 5... Multiplexing circuit, 6... Signal processing circuit, 7...
・Separation circuit, 8...Digital auxiliary signal output terminal, 9
A, 9B...Transmission line.

Claims (1)

[Claims] On the transmission side, a discriminator inputs multiple digital auxiliary signals in parallel and detects the presence or absence of the input auxiliary signals and whether the auxiliary signals are data or voice, and a discriminator that detects the presence or absence of the input auxiliary signals and whether the auxiliary signals are data or voice. a multiplexing circuit for time-division multiplexing each signal string read out by the memory; and a multiplexing circuit for time-division multiplexing each signal string read out by the memory; A control circuit that controls the multiplexing circuit so that the digital signal is time-division multiplexed in units of 8 bits and other data signals in units of 1 bit, and a main signal input from the outside and an output signal of the multiplexing circuit. and a signal processing circuit that configures the time division multiplexed auxiliary signal into one frame, and on the receiving side, a signal processing circuit that separates the main signal sent from the opposite station and the time division multiplexed auxiliary signal, and the time division multiplexed auxiliary signal. 1. A communication device for digital auxiliary signals, comprising a separation circuit that separates and outputs a plurality of auxiliary signals, and a memory circuit.