Audio mixing method applied to multi-point mobile audio communication system

An audio communication and sound mixing technology, which is applied in speech analysis, instruments, etc., can solve problems such as unsatisfactory effects and low volume of sound mixing processing, and achieve good audio effects and meet the requirements of audio communication.

Inactive Publication Date: 2012-07-04
ZTE VAST SKY INFORMATION TECH
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AI Technical Summary

Problems solved by technology

The usual voice data bit is 16bit, that is, the short type in the algorithm, and the value range is -32768≤sample value≤32767. After multiple audio streams are directly superimposed linearly, overflow may occur, so the final result of formula (1) may have Overflow produces noise; Equation (2) is right, Calculate the average value to solve the overflow problem, but the volume after the mixing process is very small, and the effect is very unsatisfactory

Method used

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  • Audio mixing method applied to multi-point mobile audio communication system
  • Audio mixing method applied to multi-point mobile audio communication system
  • Audio mixing method applied to multi-point mobile audio communication system

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Embodiment Construction

[0025] Below according to accompanying drawing this patent is described further

[0026] Such as figure 1 As shown, the audio data stream is collected from the device terminal and the data stream is encoded, and the streaming media data is transmitted to the server through the network. When the server receives the audio signal of the terminal device, it first decodes the received audio data stream, and Hand it over to the relevant processing module for processing.

[0027] figure 2 As shown, it is right figure 1 A detailed description of the processing. Collect the local audio data stream of the server on the basis of the original collected audio data stream of the terminal equipment, and then filter the audio data stream, mainly to filter out the audio data of the destination itself, such as the mixed data stream If it is to be forwarded to terminal device A, the audio data transmitted by A should be filtered, and only B, C, and the audio data collected locally by the se...

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Abstract

The invention discloses an audio mixing method applied to a multi-point mobile audio communication system. Audio data stream is acquired by means of network acquisition and server local acquisition, the acquired audio data stream is subjected to linear superposition, and audio data are attenuated by dynamically modifying variation factors. Using the method can guarantee integral sound intensity not to be attenuated too fast and guarantee low distortion, noise is avoided within a multi-channel audio mixing range, and audio effects can meet the requirements. The method is widely applicable to multi-point mobile audio communication command systems or multimedia online video conference systems.

Description

technical field [0001] The invention relates to a voice communication method, in particular to a sound mixing method applied to a multipoint mobile audio communication system. Background technique [0002] With the rapid development of the mobile field, problems such as real-time communication of work, realization of teamwork, improvement of work efficiency, transmission of on-site conditions, and ensuring that superiors have a clear understanding of the work status of subordinates have gradually emerged. The multi-point mobile audio communication command system thus produced by need. In the multi-point mobile audio communication command, when there are many people speaking at the same time, the traditional method is to use the method of controlling the right to speak, that is, only one person is allowed to speak at a time, and it is necessary to apply for the right to speak to the center before speaking. Release the right to speak, this method limits the communication bet...

Claims

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Application Information

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IPC IPC(8): G10L19/00G10L21/003
Inventor 周海龙承志向满天虞贵财罗建平邹文生余尧毅
Owner ZTE VAST SKY INFORMATION TECH
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