JPS59152769A - Conference communicating device - Google Patents

Abstract

PURPOSE:To realize plural conference communications at the same time by providing memories storing a voice adding data for the number of conference groups in a time division exchange. CONSTITUTION:Information discriminating a conference group of each subscriber and information whether or not the data are to be added are informed to a control circuit 14 at each subscriber corresponding to a time slot of an input highway 1 via a control information line 13. When the data of the input highway is circulated on a loop consisting of an adder 2, memories 9, 10 and a selector 11 according to the information, the control circuit 14 controls the write of the memories 9, 10 so that the voice of optional subscribers is added by optional number of personnels. The two memories 9 10 are provided because the read and write of the added data of each group are performed alternately. The added data at each group is outputted to an output highway 7 by deleting the own voice with the selector 12, a memory 8 and a subtractor 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a conference call device that allows three or more parties to make calls simultaneously via a time division switch or the like.

Conventionally, the adder circuit used in this type of conference call device mainly consisted of a shift register and an adder, so in order to simultaneously realize multiple conference groups, the same power output was required.
There was a drawback that a plurality of N circuits were required.

FIG. 1 shows an embodiment of a conventional adder circuit, in which 1 is an input highway, 2 is an adder, 6.4 is a shift register, 5 is a subtracter, 6 is an attenuator, and 7 is an output highway. The time-division multiplexed subscriber audio signals are added by the adder 2, the shift register 6, and the star every frame. Delete the audio signal you spoke from the audio information. Further, the attenuator 6 attenuates the voice signal after the addition so as to satisfy the ringing and quasi-ringing conditions accompanying the addition of multi-party calls.

Therefore, in such a conventional circuit, in order to realize a plurality of conference groups at the same time, it is necessary to prepare a plurality of circuits constituted by the above-mentioned circuits 2 to 6, which is uneconomical.

In order to eliminate these drawbacks, the present invention provides a memory for storing audio data and a control circuit thereof.The purpose of the present invention is to efficiently provide a conference call device that can simultaneously conduct conference calls for six or more parties in multiple groups. The goal is to achieve this goal.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 2 shows an embodiment of the present invention, in which the same parts as the 6131st section are denoted by the same reference numerals. In Figure 2, 8.9.1
0 is memory, 11.12 selector 13 is control information line,
14 is a control circuit.

To operate this system, first, a time division exchange (not shown) receives dial information from each subscriber, and identifies which conference group each subscriber belongs to. After that,
Exchange, pass all reverse control information lines 13 and input highway 1.
According to these information, the control circuit 14 is notified of the conference group identification information for each subscriber corresponding to the time slot, and information on whether to add or not depending on which subscriber is busy, etc. , time-division multiplexed input highway data is sent to adder 2, memory lJ9.1o, and selector 1.
1. The closed loop of the adder 2 circulates every frame, and during this one frame, according to the control circuit 14, the information ACT determines whether or not to add one for each time slot. Memo +79.
Control the 10-degree addition. That is, it is identified which subscriber is currently attending the conference, according to the information TSH of the time slot number corresponding to the subscriber.

As a result, it is possible to add up any number of input voices of any subscriber. Also, by turning ON the conference loop identification number in which the subscribers participate, and controlling the write and read addresses in the memory 9.10, it is possible to simultaneously hold conference calls for a plurality of groups.

That is, the information GN can distribute 71++M- of the voices of the subscribers belonging to each group for each group. The reason why there are two memories 9 and 10 is that the addition of data for each conference group and the reading and writing of audio data have to be repeated. When one frame is completed and the audio data added for each conference group is obtained, the result is read out through the selector 12, and the self-sound μ is deleted from the memory 8 and subtracter 5 and output. 7 is output.

As explained above, according to the present invention, if a plurality of memories for storing audio addition data are prepared, if the conference call device has N input channels, one group of N-person conference calls can be configured. In addition, if it is a three-party conference call, a group configuration can be established, and a wide range of conference calls can be provided. Furthermore, if only the memories for storing all the audio addition data are prepared for the maximum allowable number of groups, other circuits such as adders can be used in time division multiplexing, and the circuit scale can be reduced.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the 1ν value of a conventional adder circuit for conference calls.
FIG. 2 is a diagram showing an embodiment of the adder circuit for monthly J talk meeting according to the present invention. 1 - Input highway 2... Adder 5.4...
shift register

Claims (1)

[Claims] In a conference call device that realizes simultaneous calls between three or more subscribers, information identifying the conference group in which the subscriber participates is added corresponding to the time slot of each subscriber in a time-division multiplexed input signal. , a memory is provided to hold the addition results corresponding to each conference group, and the addition results are read out according to the conference group identification information for each subscriber's time slot, and added by specifying the address of the memory corresponding to the conference group to be written. A conference call device characterized by: