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A method to eliminate echo number-receiving and conference system

A conference system and echo technology, which is applied in the field of communication, can solve the problems that the echo can not be completely eliminated, and achieve the effect of eliminating the echo

Active Publication Date: 2009-11-25
HUAWEI CLOUD COMPUTING TECH CO LTD
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Problems solved by technology

[0008] However, when the second method is adopted, since the DTMF signal is input into the conference mixing processing unit and the signal tone detection unit, a certain algorithm delay is required to detect that the signal is indeed a DTMF signal, and the DTMF signal not detected during this period will be Leaked into the conference audio mixing processing unit to participate in audio mixing and sent to other conference participants, its echo may still be detected, and the purpose of eliminating echo and receiving numbers cannot be fully realized

Method used

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  • A method to eliminate echo number-receiving and conference system
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Embodiment Construction

[0028]The invention provides a method for eliminating the echo number collection, which mainly uses the signal energy difference and the receiving time difference of the number to judge the echo number collection and discards it, that is, performs energy calculation on the received number signal to obtain the signal energy; Analyze the number signal of the number and record the receiving time; compare the signal energy and receiving time of the number received this time and the last received number, if the signal energy difference between them is greater than the set threshold value, and the receiving time difference is less than the set time value, Then confirm that the received number is an echo received number, and discard the number.

[0029] see image 3 , is the flow chart of the first embodiment of the echo elimination method of the present invention, comprising steps:

[0030] A1. Calculate the signal energy in an iterative manner;

[0031] After receiving the number...

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Abstract

The invention discloses a method for eliminating echo and receiving numbers. The method includes: performing energy calculation on the received number signal to obtain signal energy; analyzing the number according to the received number signal and recording the receiving time; comparing the signal energy and receiving time of the number received this time and the number received last time, if they If the signal energy difference between them is greater than the set threshold value, and the receiving time difference is less than the set time value, then it is confirmed that the number received this time is an echo received number, and the number is discarded. Correspondingly, the present invention discloses a conference system capable of eliminating echo and receiving numbers. The present invention can effectively eliminate the echo collection.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for eliminating echo and receiving numbers and a conference system. Background technique [0002] With the development of society, people often use conference calls to replace traditional conference forms in order to save costs. A general telephone conference system includes a conference management unit, a conference sound mixing processing unit and a signal tone detection unit. see figure 1 , is a schematic diagram of an existing teleconferencing system application. The figure includes the conference system, switches, and participants. Participants can access the conference system through the switch. The conference sound mixing processing unit realizes the functions of audio mixing and distribution, and can mix the voices of multiple users and send them to each participant. The signal tone detection unit realizes the function of number detection for the input...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M3/56H04M9/08
Inventor 朱祥文吴宗武许波舒曦辉
Owner HUAWEI CLOUD COMPUTING TECH CO LTD
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