Method for modifying sound channel delay parameter of multi-channel signal

A multi-channel signal and delay parameter technology, which is applied in the field of communication, can solve the problems of signal quality degradation, signal frequency domain amplitude attenuation, and affect the quality of multi-channel signals, etc., so as to weaken the comb filter effect and improve the sound image The effect of quality and clarity
CN102307323AActive Publication Date: 2012-01-04HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUAWEI TECH CO LTD
Publication Date
2012-01-04

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Abstract

The embodiment of the invention provides a method for modifying a sound channel delay parameter of a multi-channel signal. The method mainly comprises the following steps of: carrying out down mixed processing on the multi-channel signal to obtain a processed signal; calculating energy distribution of the processed signal; and judging whether the processed signal generates a comb filtering effect according to the energy distribution of the processed signal, if so, modifying the sound channel delay parameter of the multi-channel signal. According to the method disclosed by the invention, whether the comb filtering effect is generated is judged according to the energy distribution of the processed signal obtained by carrying out down mixed processing on the multi-channel signal, thereby whether the sound channel delay parameter is required to be modified is judged to eliminate the comb filtering effect and further provide better reconstruct stereophonic sound and a sound image and the definition of the multi-channel signal.
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Description

technical field

[0001] The invention relates to the field of communication technology, in particular to a method for correcting channel delay parameters of multi-channel signals. Background technique

[0002] Multi-channel signals have a wide range of application scenarios, such as conference calls, games, etc., and the encoding and decoding of multi-channel signals is also receiving more and more attention. Traditional encoders based on waveform coding, such as MPEG (Moving Pictures Experts Group, Moving Picture Experts Group)-LII, mp3 (Moving Picture Experts Group Audio Layer III, moving picture experts compression standard audio level 3) and AAC (Advanced Audio Coding , Advanced Audio Coding), when encoding a multi-channel signal, each channel is encoded independently. Although this encoding method can better restore multi-channel signals, the required bandwidth and encoding rate are several times that of mono-channel signals.

[0003] Stereo or multi-channel coding tec...

Claims

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