Multichannel sound signal coding and decoding method and device

A technology of sound signal and coding method, which is applied in speech analysis, instruments, etc., can solve the problems of coded signal quality and statistical redundancy that cannot take into account coding efficiency, and achieve good estimation and utilization, high coding efficiency, and reduced statistical redundancy. Effect

Active Publication Date: 2016-02-17
BEJING ANGEL VOICE DIGITAL TECH
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Problems solved by technology

[0007] The present invention provides a multi-channel audio signal encoding method, decoding method and device, the purpose of which is to solve the existing statistical redundanc

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  • Multichannel sound signal coding and decoding method and device
  • Multichannel sound signal coding and decoding method and device
  • Multichannel sound signal coding and decoding method and device

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Embodiment Construction

[0022] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0023] The multi-channel sound signal coding method in the embodiment of the present invention is different from other methods in the prior art, and fully utilizes the statistical characteristics and psychoacoustic characteristics of the multi-channel sound signal, while obtaining extremely high coding efficiency, To ensure the quality of the encoded signal, by adopting the method of adaptive subspace mapping, the statistical redundancy between multi-channel signals can be eliminated to the greatest extent, creatively using a variety of subspace mapping models, and adaptively selecting the mapping model in encoding, can It better estimates and utilizes the statistical characteristics of signals between channels, and minimizes the statistical redundancy between channels to achieve higher coding efficiency.

[0024] fig...

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Abstract

The invention relates to a multichannel sound signal coding and decoding method and device. The coding method includes: adopting time-frequency transformation to map first multichannel sound signals to be first frequency domain signals, or adopting sub-band filtering to map the first multichannel sound signals to be first sub-band signals; dividing the first frequency domain signals or the first sub-band signals into different time-frequency sub-bands; in each time-frequency sub-band, calculating first statistical characteristics of the first multichannel sound signals; according to the first statistical characteristics, estimating an optimized sub-space mapping model; adopting the optimized sub-space mapping model to map the first multichannel sound signals to be second multichannel sound signals; according to time, frequency and sound channels, performing perceptual coding on at least one group of the second multichannel sound signals and the optimized sub-space mapping model to acquire coded multichannel code stream. In a word, the coding method selects mapping models in a self-adaptive manner, and higher coding efficiency and coding quality can be realized.

Description

technical field [0001] The invention relates to the technical field of audio processing, in particular to a multi-channel sound signal encoding method, decoding method and device. Background technique [0002] With the development of science and technology, a variety of coding technologies for sound signals have emerged. The above-mentioned sounds usually refer to digital sounds including signals perceivable by human ears such as voice, music, natural sounds, and artificially synthesized sounds. At present, many sound coding technologies have become industrial standards and have been widely used and integrated into people's daily life. The commonly used sound coding technologies include Dolby Laboratories' AC-3, Digital Cinema Systems' DTS, Moving Picture Experts Group (MPEG ) organization's MP3 and AAC, Microsoft's WMA, and Sony's ATRAC. [0003] In order to reproduce the stereophonic sound effect, multi-channel sound signals are played to users by multiple channels, and t...

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Application Information

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IPC IPC(8): G10L19/008G10L19/22G10L19/02
CPCG10L19/008G10L19/02G10L19/22
Inventor 潘兴德
Owner BEJING ANGEL VOICE DIGITAL TECH
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