JPH0632523B2 - Signal processor - Google Patents

Description

The present invention relates to the configuration of a signal processing device of a time division switch.

2. Description of the Related Art Conventionally, a signal processing device for processing data on a PCM highway input / output to / from a time division exchange is dedicated to each type of signal to be handled, for example, a multi-frequency signal transmitter, a multi-frequency signal receiver, a PB (push button). A signal receiver, conference call signal processing device, etc. are provided separately. The number of devices for each type requires the maximum number of equipment required at the peak of signal processing of that type. Therefore, the total number of facilities is large due to the division loss. Further, since the size of the device and the interface with the line are different for each signal type, it is not possible to mount another type of signal processing device in the space for mounting a certain type of signal processing device. Furthermore, it is extremely difficult and inflexible to add a new function or replace a new device.

In order to make up for this drawback, a concept has been proposed in which signal processing is performed by a program using a microprocessor for signal processing, which has the same size of device and interface with a line (electronic communication in 1981). National Conference of Japan, S-15-6 "Advancement of Digital Signal Processors and Application to Electronic Exchanges"). According to this method, it is relatively easy to add new functions, etc. Also, even if different types of signal processing devices have the same interface with the line and the size of the device, the mounting space for each type can be reduced. No need to divide. However, the type of signals handled by one processing device and the number of lines are fixed, and the same number of devices as the maximum processing required for simultaneous operation are required for each type.

An object of the present invention is to provide a signal processing processor capable of solving the above-mentioned conventional drawbacks and changing the type of signal to be handled by a control signal, by a capacity sufficient to handle the number of simultaneous operations as a whole. The object of the present invention is to provide a signal processing device in which the total number of signal processing processors is reduced.

The signal processing apparatus of the present invention selects one microprogram from among a plurality of microprograms by a microprogram selection command which is connected to an input highway and / or an output highway and is given from a control circuit described later, and the microprogram is input by the program. A plurality of signal processing processors having the same configuration for processing output signals and a highway control circuit which gives a time slot number of a highway for sending a microprogram selection command to the signal processing processor and simultaneously inputting and outputting to the signal processing processor. The control circuit and a highway control circuit for inputting a time slot number output from the control circuit, converting the time slot number into an output timing signal and supplying the output timing signal to the signal processing processor, each signal processing processor according to an instruction from the control circuit. The signal processing function of The features.

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

FIG. 1 is a block diagram showing an embodiment of the present invention.
That is, the signal processing processors 6a, 6b, 6c have the same configuration, and have the same interface with the input highway 1 and the output highway 2. Each of the signal processing processors 6a, 6b, 6c has a plurality of microprograms for performing various signal processings stored in a built-in memory (or a shared memory), and is supplied from the control circuit 8 via the bus 3. The select instruction selects a microprogram for processing the specified type of signal. Signal processor 6a,
6b and 6c are set by reading the microprogram selection instruction output by the control circuit 8 to the bus through the interface through the interface, reading the microprogram specified by the microprogram selection instruction from the internal memory or the shared memory. Then, one signal processing function is executed. The signal processor 6a has a PB signal processing function, the signal processor 6b has an MF signal processing function, and the signal processor 6c has a conference call signal processing function according to the micro program selected by the micro program selection command from the control circuit 8. Shall have.

The control circuit 8 gives the above-mentioned program selection instruction to each of the signal processors 6a, 6b, 6c via the bus 3 and, on the highway corresponding to each signal type processed by the signal processor 6a, 6b, 6c. The highway control circuit 7 is notified of the time slot (channel) number of the above via the bus 3. The highway control circuit 7
The control signal lines 4a, 4b, 4c and 5a, 5 are converted into, for example, timing signals by the time slot number.
signal processor 6a, 6b, 6c via b, 5c
Give to.

When changing the signal processing function of the signal processing processors 6a, 6b, 6c, the control circuit 8 outputs a new microprogram selection command to the signal processing processor which changes the signal processing function, and the signal processing function is changed. The timing signal which notifies the highway control circuit 7 of the time slot number of the signal processed by the signal processor whose number has been changed, and which the highway control circuit 7 outputs to each signal processor 6a, 6b, 6c corresponding to the time slot number. To change. FIG. 2 shows control signals 4a, 4b, 4c, 5
3 is a time chart showing an example of timing signals on a, 5b, and 5c. Input highway 1 time slot #
The PB reception signals PBR and PBR 'of 0 and # 1 are input to the signal processing processor 6a, the MF reception signal MFR of time slot # 2 is input to the signal processing processor 6b, and the conference telephone signals CFC- of time slots # 3 to 6 are input. A, CFC
-B, CFC-C, CFC-D are input to the signal processing processor 6c. Further, the MF transmission signal MFS output from the signal processing processor 6b is sent to the time slot # 10 of the output highway 2 and the call signals CFC-A ', CFC- of the conference telephone output from the signal processing processor 6c.
B ', CFC-C', and CFC-D 'are output highways 2
Are sent to the time slots # 3 to # 6.

The signal processing processor 6a receives the PB reception signals PBR and PB from the time slots # 0 and # 1 of the input highway 1.
When R'is received, the received signal is decoded and the like, and the destination information and the like necessary for the exchange processing is notified to the control circuit 8 and a central processing unit (not shown) via the bus 3. Similarly,
The received signal MFR of the multi-frequency signal of time slot # 2 is input to the signal processing processor 6b and subjected to processing such as decoding. The transmission signal of the multi-frequency signal transmitted to the time slot # 10 of the output highway 2 is the signal processing processor 6
b.

The signal processing processor 6c inputs the transmission signals of the conference telephones of the time slots # 3 to # 6 of the input highway 1, performs processing such as selection processing, and sends them to the time slots # 3 to # 6 of the output highway 2. Input and output highways 1, 2
Is, for example, a transmission line of a paired 4-wire line, and time slots # 3 to # 6 are transmission and reception channels of subscribers A, B, C, and D, respectively. Now, for example, when subscriber A speaks, time slot # 3 of input highway 1
Signal CFC-A has the highest call level. The signal processing processor 6c selects a speaker by comparing the levels of the time slots # 3 to # 6, etc., and sends the signal CFC- to the time slots # 4, # 5, # 6 of the output highway 2.
B ', CFC-C', CFC-D 'are all CFC-A
And It is not necessary to send a signal to time slot # 3. That is, the speech of subscriber A is input highway 1
From the time slot # 3 of the signal processing processor 6c, and the time slots # 4, # 5 of the output highway 2 are input.
It is sent to # 6 and transmitted to the subscribers B, C and D. Next, when the subscriber B speaks, it is similarly processed by the signal processing processor 6c, sent to the time slots # 3, # 5, # 6 of the output highway 2 and transmitted to the subscribers A, C, D. It

The signal processing processors 6a, 6b, 6c are not fixed functions as described above. Therefore, for example, when the conference call is not made, the signal processing processor 6c can be provided with a transmitting / receiving function of a multi-frequency signal. is there. Therefore, it suffices that the total capacity of each signal processing processor has a processing capacity necessary for simultaneously performing PB signal processing, MF signal processing, and call signal processing of a conference call. That is,
As in the prior art, it is possible to eliminate the division loss caused by processing in each dedicated device for each signal type and reduce the total capacity of the signal processing processor. Also, new functions can be easily added by changing the program. It should be noted that the input / output highways 1 and 2 do not form a pair of 4-wire lines as described above, and even if they are completely different lines, the same effect can be obtained by the same configuration. The highway control circuit 7 also has a function of a time division switch by changing the input / output time slot of the signal processing processor.

As described above, in the present invention, the signal processing processor is configured to have multiple functions, and what kind of signal processing is performed is
The change is made possible by a micro program selection command given from the control device, and the signal of the corresponding time slot is inputted by the control signal given from the highway control circuit, and is sent to the designated time slot. Therefore, each signal processing processor can perform another type of signal processing when it does not perform one type of signal processing. There is an effect that it can be reduced to the required capacity. That is, there is an effect of eliminating the division loss that has conventionally occurred because a dedicated signal processing device is used for each type of signal. Further, since various signal processings are performed by the signal processing processor having the same configuration, the interface with the line becomes the same, and it is easy to add or add new functions.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a time chart showing an example of each part signal in the above embodiment. In the figure, 1 ... Input highway, 2 ... Output highway, 3 ... Bus, 4a, 4b, 4c, 5a, 5b, 5
c ... Control signal line, 6a, 6b, 6c ... Signal processing processor, 7 ... Highway control circuit, 8 ... Control circuit.

Claims (1)

[Claims] 1. A signal processing apparatus comprising a plurality of signal processing processors of the same configuration, which are connected to an input highway or an output highway and process an input signal or an output signal, the signal processing apparatus being connected to the signal processing processor by a bus. A control circuit for controlling the signal processing device and a highway control circuit for outputting input / output timing signals corresponding to the time slot numbers of the input highway and the output highway, each signal processor having a plurality of different signal processing functions in advance. A microprogram, including means for selecting and executing one of a plurality of microprograms in accordance with a microprogram selection command given from the control circuit to perform the signal processing, wherein the control circuit causes the signal processor to On the other hand, the microprogram selection command And a control means for giving a highway time slot number connected to the signal processor to the highway control circuit, the highway control circuit converting the time slot number received from the control circuit into the input / output timing signal. Circuit means for supplying to the corresponding signal processing processor, one signal processing function is selected for each signal processing processor, by the selected signal processing function on the input highway or output highway A signal processing apparatus configured to supply the input / output timing signal corresponding to a time slot in which a signal to be processed should exist to cause each of the signal processing processors to perform signal processing.