KR100407934B1 - Multi-communication system providing secret communication function in Exchanger - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-party call method, and more particularly, to a multi-party call system in which a secret call method for delivering a message only to a specific person during a multi-party call is implemented. The multi-party call system of the present invention outputs a secret message that is input to a voice signal of a plurality of callers, a DTMF signal included in the voice signal and transmitted by a predetermined first caller to a predetermined second caller among the plurality of callers. DTMF receiver for detecting whether or not, a switching unit for receiving the voice signal input to the input unit, extracting the secret message detected by the DTMF receiver, and outputting a composite signal of the voice signals applied from the outside, recording unit for recording and playing the secret message A first conference device for synthesizing voice signals excluding secret messages and outputting them to the switching unit, and a second conference device for synthesizing secret messages reproduced in the recording unit and all voice signals transmitted to the second caller and outputting them to the switching unit. It is configured to include, the advantage of being able to conduct a secret call to a specific person during the conference call There.

Description

Multi-communication system providing secret communication function in Exchanger

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-party call method, and more particularly, to a function of delivering a message to a specific person when talking to several people.

Conventional conference (Conference) function is configured for the purpose of a simple call, it is made as shown in FIG.

The multi-party call function shown in FIG. 1 is configured to provide a simple conference function, where the first caller can hear the voices of the second caller and the third caller, and the second caller can hear the first caller. The voice of the third caller can be heard, and the third caller can hear the voices of the first caller and the second caller.

That is, the conventional multi-party call system operates as follows.

First, voices 11, 12, and 13 of the first caller, the second caller, and the third caller are input to the conference device 10 as PCM signals through the switching device 20, respectively. Then, the conference apparatus 30 outputs the sum of the voice signals of the other party of the caller input to the conference apparatus 30. For example, when the voices 11, 12, 13 of the first caller, the second caller, and the third caller are sequentially input to the conference device 30 as shown in FIG. The output signal is synthesized by the first synthesized signal 41 in which the second caller voice B and the third caller voice C are synthesized, and the first caller voice A and the third caller voice C are synthesized. The second synthesized signal 42 and the first caller voice A and the second caller voice B are output in the order of the synthesized third synthesized signal 43.

Then, the switching device 20 controls the first synthesized signal 41 to be delivered to the first caller, controls the second synthesized signal 42 to be delivered to the second caller, 3, the synthesized signal 43 is controlled to be transmitted. That is, the switching device 20 converts the first synthesized signal 41, the second synthesized signal 42, and the third synthesized signal 43 into a first caller, a second caller, and a first call so as to make a multi-party call. 3 It is rearranged by caller's receiving channel. At this time, the number of receiving channels is increased or decreased according to the performance of the conference apparatus.

However, the conventional multi-party call function has a disadvantage in that it is not possible to deliver a message to a specific person separately while making a multi-party call in addition to simply allowing several people to call together.

An object of the present invention is to provide a multi-party call system that can deliver a separate message only to a specific person during a multi-party call.

1 is a block diagram schematically illustrating a conventional conference system.

2 is a block diagram schematically illustrating a multi-party call system of the present invention.

Explanation of symbols for main parts of the drawings

100 input unit 200 switching unit

300: DTMF receiving unit 400: output unit

500: recording unit 500: first conference apparatus

600: second conference unit

According to the present invention, as shown in FIG. 2, an input unit 100 for receiving a voice signal of a plurality of callers and a presence or absence of outputting a secret message transmitted only to a predetermined second caller by a first caller among the plurality of callers are provided. A switching unit configured to receive a DTMF receiver 300 and a voice signal input to the input unit 100, extract a secret message selection signal detected by the DTMF receiver 300, and input / output a composite signal of voice signals applied from the outside ( 200, a recording unit 500 for recording and reproducing secret messages, a first conference device 600 for synthesizing and outputting voice signals excluding secret messages to the switching unit 200, and reproducing in the recording unit 500. And a second conference device 700 for synthesizing the secret message and all voice signals transmitted to the second caller and outputting the synthesized voice message to the switching unit 200.

The input unit 100 receives a voice signal of a plurality of callers. In addition, a secret message transmitted by a predetermined first caller to a specific person is also received.

The DTMF receiver 300 detects the DTMF signal from the voice signal input to the input unit 100. Thus, it is detected whether a predetermined first caller receives a secret message sent to a specific person.

The switching unit 200 receives the voice signals of all callers input to the input unit 100 and inputs all the remaining voice signals except the secret message to the first conference apparatus 600. In addition, the switching unit 200 transmits all signals synthesized by the first conference device 600 or the second conference device 700 to the output unit 400. At this time, the switching unit 200 extracts the voice signal specified by the secret message selection signal detected by the DTMF receiving unit 300 and inputs it to the recording unit 500, and if all the secret messages are extracted to the recording unit 500 The recorded secret message is input to the second conference apparatus 700.

The recording unit 500 records the secret message, and when the recording of the secret message is completed, the secret message is input again to the switching unit 200.

The first conference apparatus 600 receives a voice signal excluding a secret message from the switching unit 200, synthesizes the voice signal, and outputs the synthesized voice signal to the switching unit 200 again. Then, the second conference apparatus 700 receives the secret message reproduced in the recording unit 500 from the switching unit 200 and synthesizes all the voice signals transmitted to the caller to receive the secret message again switching unit ( 200).

The operation principle of the present invention is as follows.

When the caller's voice signal is input to the switching unit 200, the caller's voice signal is input to the first conference device 600. The voice signals of various callers are synthesized by the first conference device 600 and input again to the switching unit 200. In addition, the DTMF receiver 300 continuously detects the DTMF signal included in the voice signal of the caller input to the switching unit 200.

If a specific caller presses a control key of a terminal to make a secret call with another caller during a multi-party call, a DTMF signal corresponding to the control key is generated, and the DTMF receiver 300 detects whether or not a specific call is made. Done.

When the DTMF receiver 300 detects whether or not a specific caller performs a secret call, the voice signal of the specific caller is input to the recording unit 500. Thus, the voice signal of the particular caller is recorded by the recording unit 500. In addition to the specific caller, the voice signals of the remaining callers are input to the first conference device 600, and the respective voice signals are combined and outputted by the switching unit 200.

The voice signal of the particular caller recorded by the recording unit 500 is inputted to the second conference apparatus 700 while being reproduced again. The voice signal of the specific caller inputted to the second conference device 700 is combined with the voice signal output from the first conference device 600 and transmitted to the caller who the specific caller is trying to secretly call.

Hereinafter, the operation principle of the present invention will be described by taking an example in which a first caller wants to deliver a message only to a fourth caller while four people are in a multi-party call.

First, a voice signal is input to the switching unit 200 in order of a first caller, a second caller, a third caller, and a fourth caller. At this time, if the first caller sets a secret message delivered only to the fourth caller, the DTMF signal corresponding to the secret message is included in the voice signal of the first caller and input to the switching unit 200.

Then, the voice signal of the first caller is stored in the recording unit 500, and the voice signal of the second caller, the third caller, and the fourth caller is sequentially input to the first conference device 600. As a result, the first synthesized signal obtained by combining the voice signals of the third caller and the fourth caller, the second synthesized signal obtained by combining the voice signals of the second caller and the fourth caller, and the second through the first conference device 600. A third synthesized signal obtained by combining the voice signals of the caller and the third caller is sequentially output.

The first composite signal, the second composite signal, and the third composite signal are output through the switching unit 200 to form a normal multi-party call. Of course, at this time, the voice signal of the first caller has not yet been transmitted to the other caller.

When the first caller releases the secret message, the recording unit 500 finishes recording the voice signal corresponding to the secret message. Then, the voice signal of the first caller, the voice signal of the second caller, the voice signal of the third caller, and the voice signal of the fourth caller are sequentially input to the first conference device 600. Accordingly, the first conference apparatus 600 includes a first synthesized signal in which voice signals of the second caller, the third caller, and the fourth caller are combined, and a voice signal of the first caller, the third caller, and the fourth caller. 2 'synthesized signal combined, 3' synthesized signal combined with voice signals of first caller, second caller and fourth caller, and voice signals of first caller, second caller and third caller Output the combined 4 'synthesized signal. The first ', second', third ', and fourth'synthesis signals are output through the switching unit 200 to form a normal multi-party call.

At this time, the secret message of the first caller reproduced by the recording unit 500 is input to the second conference apparatus 700 and combined with the 4 'synthesized signal and output. That is, the fourth synthesized signal transmitted to the fourth caller is output by combining the voice signals of the first caller, the second caller, and the third caller with the secret message of the first caller. As a result, the first caller, the second caller, and the third caller do not receive the secret message sent by the first caller to the fourth caller, but the fourth caller receives the secret message sent by the first caller. .

The present invention has the advantage that it is possible to perform a secret call to a specific person during the multi-party call compared to the conventional multi-party call system.

Claims (2)

An input unit for receiving a voice signal of multiple callers; A DTMF receiving unit for detecting whether a secret message transmitted by a predetermined first caller to a predetermined second caller among the plurality of callers in response to detecting a DTMF signal included in the voice signal; A switching unit which receives voice signals of the plurality of callers input to the input unit, extracts the secret message sensed by the DTMF receiver, and outputs a composite signal of the voice signals applied from the outside; A recording unit for recording and playing back the secret message extracted from the switching unit; A first conference device for synthesizing the voice signals of the plurality of callers other than the secret message and outputting the synthesized voice signal to the switching unit; And a second conference device for synthesizing the secret message reproduced by the recording unit and all voice signals of the plurality of callers transmitted to the second caller and outputting the synthesized audio signal to the switching unit. The apparatus of claim 1, wherein the first conference device And outputting the remaining signal to the switching unit except for a signal synthesized with the voice signal transmitted to the second caller receiving the secret message.