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Audio mixed processing method and processor

A sound mixing and audio technology, which is applied in the field of audio mixing processing method and its device, can solve the problems of affecting the sound effect, the deterioration of the sound effect, and the deterioration, so as to achieve the effect of ensuring the quality of the call

Active Publication Date: 2009-02-04
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, when the largest three parties in this kind of conference change, when the coder sent to the terminal is switched, since the state of the coder is context-dependent, direct switching will affect the sound effect, resulting in the deterioration of the sound effect heard by the terminal
For example in the above image 3 Among them, the three parties with the highest volume change from the original 1, 2, 3 to 1, 4, 5, then for terminal 2, it is the encoder C2 that encodes the data sent to terminal 2, and the three parties with the largest volume are switched to 1, 4, and 5. After 4 and 5, the data sent to terminal 2 becomes coded by encoder C4, and the sound heard at terminal 2 will become worse within a period of switching

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Embodiment Construction

[0032] The core idea of ​​the present invention is to combine the encoders with the same processing as much as possible, and at the same time, when the parties with the highest volume change, control the number and switching process of the encoders that process the audio signals sent to the terminal, saving encoders Quantity while ensuring the quality of terminal audio output.

[0033] The audio mixing processing system provided by the present invention performs audio mixing after decoding the received terminal data, and then controls the encoder to encode the audio mixing signal and outputs it. The system includes a decoding module, a sound mixing module, an encoding module and an encoder switching processing module. Such as Figure 4 shown, where

[0034] Decoding module: perform audio decoding on the received audio to obtain original audio data;

[0035] Mixing module: perform envelope calculation on audio data, and perform mixing processing on the parties with the loude...

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Abstract

The method comprises: when a terminal with max voice volume varies, the coding control is respectively made for the audio signals of terminals with max voice volume before and after variation of voice volume. The invention also reveals a mixed sound processing apparatus comprises a decoder, a mixing module, an encoding module and a decoder switching module.

Description

technical field [0001] The present invention relates to the field of audio signal processing, in particular to an audio mixing processing method and device thereof. Background technique [0002] With the increasingly widespread application of video conferencing, the requirements for processing resources of the MCU (Multipoint Control Unit) of the video conferencing system are getting higher and higher. On the premise of limited network bandwidth resources and no reduction in audio quality, the reduction of audio processing resources can better meet the requirements of high-quality video and audio protocol processing or the same audio processing resources to achieve more audio processing access. In the audio mixing processing of the MCU in traditional video conferencing, most of the connected terminals hear the same sound in many cases, that is, these terminals can be processed uniformly instead of individually, which saves audio Processing resources provide a lot of headroo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/15H04M3/56G10K15/08
Inventor 梁丽燕
Owner HUAWEI TECH CO LTD