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Multichannel sound signal coding and decoding method and device

A sound signal and coding method technology, applied in speech analysis, instruments, etc., can solve the problems of statistical redundancy and the inability to take into account the coding efficiency and coding signal quality, so as to achieve high coding efficiency, ensure quality, and reduce statistical redundancy.

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 redundancy in the multi-channel audio signal encoding method in the prior art, which cannot take into account both the encoding efficiency and the quality of the encoded signal The problem

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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

[0021] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0022] 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, when performing adaptive subspace mapping, the method of Principal Component Analysis (PCA) is adopted, which can better estimate and utilize the statistical characteristics of the inter-channel signal, and minimize the channel Statistical redundancy among them to achieve higher coding efficiency. In particular, the embodiment of the present invention is aimed at a multi-channel sound codec using MDCT or MDST, and adopts the PCA mapping method in the MDCT / MDST doma...

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Abstract

The invention relates to a multichannel sound signal coding and decoding method and device. The coding method includes: using modified discrete cosine transform (MDCT) or modified discrete sine transform (MDST) to map first multichannel sound signals into first frequency domain signals; dividing the first frequency domain signals into different time frequency sub-bands; in each time frequency sub-band, calculating the first statistical properties of the first multichannel sound signals; estimating a principal component analysis (PCA) mapping model according to the first statistical properties; using the PCA mapping model to map the first multichannel sound signals into second multichannel sound signals; perceptually coding at least one group of second multichannel sound signals and the PCA mapping model according to the differences in time, frequency and channel to obtain coded multichannel code streams. The coding method has the advantages that the MDCT or MDST is used to perform time frequency mapping, the PCA mapping model is specifically estimated according to the statistical properties, and high coding efficiency and quality are achieved.

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. Commonly used sound coding technologies include Dolby Laboratories' AC-3, Digital Cinema Systems' DTS, and 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 th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/008
CPCG10L19/008
Inventor 潘兴德吴超刚
Owner BEJING ANGEL VOICE DIGITAL TECH
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