PSTN teleconference sound mixing method

A technology for teleconferencing and audio mixing, applied in the field of communications, can solve problems such as poor performance, avoid audio mixing overflow, avoid the influence of echoes and background noise, and improve conference quality.

Inactive Publication Date: 2013-08-21
SHENZHEN DONGJIN SOFTWARE DEV
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  • Claims
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AI Technical Summary

Problems solved by technology

However, the method based on simple threshold judgment is often ineffective in the face of complex communication environments.

Method used

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  • PSTN teleconference sound mixing method
  • PSTN teleconference sound mixing method
  • PSTN teleconference sound mixing method

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Embodiment Construction

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0042] refer to figure 1 , the figure shows that in a PSTN conference call system, there are several participants participating in the conference call, and the telephone lines of each participant are connected to the conference call server through the public switched telephone network (PSTN, Public Switch Telephone Network), and the conference call server receives the conference calls of the participants. Input an audio signal, and output the mixed audio signal to each participant. In this embodiment, the conference call server may be a server including a computer, and the audio mixing method provi...

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Abstract

The invention relates to the field of communication and discloses a PSTN teleconference sound mixing method. The method includes the following steps that S1, voice active state monitoring is carried out on each member participating a conference, and the members in the voice active state are added into a sounding mixing list or a backup list; S2, updating is carried out on the sound mixing list at regular intervals; S3, gain adjustment is carried out on voice frequency of each member in the sound mixing list; S4, sound mixing is carried out, sound mixing results are output to each member participating the conference, for the member participating the conference which exists in the sound mixing list, output after the gain adjustment of the member is removed from sound mixing results and then outputting is conducted while for the member participating the conference which does not exist the sound mixing list, the sound mixing results are output. By means of the PSTN teleconference sound mixing method, influences on effects by echoes and background noise are reduced, conference quality is effectively improved; the number of sound mixing at the same time is increased, overflowing of mixed sound is avoided, and meanwhile, the volume of the sound will not be changed suddenly; the effect of conference clipping is improved, the difficulty of clipping is avoided, and frequent switching is avoided.

Description

technical field [0001] The invention relates to the communication field, in particular to a PSTN conference call mixing method. Background technique [0002] In modern society, teleconferencing has been used in more and more occasions. In teleconference, in order to ensure the quality of voice calls, the telephone line (PSTN) is generally used to transmit sound. The sound is mixed and then output to the parties in the conference respectively. Such as the common tripartite meeting, such as A, B, C. The theoretical mixing method is to mix the sounds of A and B to C, mix the sounds of B and C to A, and mix the sounds of A and C to B. In the above-mentioned sound mixing method, when the number of conference parties increases, not only the sound mixing operation is too many, but also it is easy to overflow. A simple way to mix is ​​to find the two sides with the most input energy, play the loudest sound to the next largest sound, play the second largest sound to the largest, m...

Claims

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Application Information

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IPC IPC(8): H04M3/56G10L19/008G10L21/02
Inventor 刘义鹏廖永坤
Owner SHENZHEN DONGJIN SOFTWARE DEV
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