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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

Active Publication Date: 2009-06-24
TENCENT TECH (SHENZHEN) CO LTD
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Problems solved by technology

[0007] The purpose of the present invention is to provide a volume automatic gain control method and system for distinguishing volume states in voice communication, so as to solve the problems in the prior art that the background noise is greatly amplified during the silence period, resulting in noisy and howling sounds, and solve the problem of In the automatic gain volume control of the prior art, the volume of the voice stream in the high volume state only increases but not decreases, resulting in the problem of excessive volume

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Embodiment Construction

[0062] The present invention will be described in detail below with specific embodiments in conjunction with the accompanying drawings.

[0063] The present invention is a volume control method and system. On the basis of the volume automatic gain control commonly used at present, the volume state of the voice stream is defined in advance, the volume state of the current voice stream is judged, and the volume of the voice stream is adjusted accordingly according to the judgment result. Adjust, and finally output the volume-adjusted voice stream.

[0064] figure 1 Shown is a schematic flow chart of the application of the present invention.

[0065] Step 101, define the voice stream volume state.

[0066] This solution pre-defines the voice stream as several volume states. In one embodiment of this program, the voice stream is pre-defined as three volume states, such as figure 1 As shown, they are the normal volume state, the mute state and the high volume state, and set the ...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03G3/20H04M9/08H04N7/15
Inventor 王麒
Owner TENCENT TECH (SHENZHEN) CO LTD
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