Volume control method and system

A volume control and volume technology, which is applied in the direction of gain control, amplification control, two-way working system, etc., can solve the problems of howling sound, voice stream volume only increasing but not decreasing, and large volume, so as to eliminate noise and howling sound, to achieve the effect of multi-channel balance
CN100505530CActive Publication Date: 2009-06-24TENCENT TECH (SHENZHEN) CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
TENCENT TECH (SHENZHEN) CO LTD
Publication Date
2009-06-24

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Abstract

The invention discloses an automatic gain volume control method and system during voice communication. By pre-defining the volume state of the voice stream and judging it during transmission, the corresponding automatic gain control (AGC) control is performed according to the judgment result, so as to realize the smooth transition of the volume of the voice stream from high pitch to mute, and solve the sudden change in volume and voice in voice transmission. incoherence etc. The method collects voice streams and judges the volume state of the collected voice streams according to a preset threshold value, and then performs corresponding automatic gain control according to the judgment results, so as to achieve smooth and coherent voice streams. In one embodiment, the application of the method in video conferencing achieves the consistency of the volume of each channel, that is, multi-channel balance, through special volume automatic gain (AGC) control on the voice stream of each channel.
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Description

technical field

[0001] The invention relates to voice communication technology, in particular to a volume automatic gain control method and system in voice communication. Background technique

[0002] At present, the core idea of ​​the automatic gain control (AGC) method commonly used to solve the channel volume control is: divide the voice stream into fixed-sized processing blocks (blocks), each processing block contains several sample points to quantize the amplitude value data. Through the level of the current volume, a certain algorithm is used to calculate a magnification (Gain) for each processing block, and then multiply this magnification by the volume amplitude value of each sample point as an output.

[0003] Automatic Gain Control (AGC) for volume is currently used in digital speakerphones. This type of digital amplified telephone generally includes a loudspeaker to receive input and output signals from remote and local users respectively, and correspondingly ge...

Claims

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