Method for encoding multi-channel digital audio

A technology of digital audio and channel number, applied in speech analysis, instruments, etc., can solve the problem of reducing the coding efficiency of transform domain coefficients, to avoid the decline of coding efficiency, meet the channel coding requirements, and achieve simple effects

Active Publication Date: 2016-05-11
广东广晟研究开发院有限公司
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AI Technical Summary

Problems solved by technology

However, due to the aliasing between the 4 PQF bands, the coding efficiency of the transform domain coefficients in the adjacent parts will decrease

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  • Method for encoding multi-channel digital audio
  • Method for encoding multi-channel digital audio
  • Method for encoding multi-channel digital audio

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no. 1 example

[0032] see figure 1In the schematic flow chart shown, the multi-channel digital audio coding method in the first embodiment of the present invention includes:

[0033] Step S1, dividing the multi-channel audio into a basic layer and at least one enhancement layer;

[0034] Step S2, respectively configuring the number of bytes for a base layer and at least one enhancement layer;

[0035] Step S3. Encode a base layer and at least one enhancement layer respectively.

[0036] combine figure 2 The schematic diagram of the two-layer structure of multi-channel digital audio is shown. The second embodiment of the present invention proposes a two-layer structure for dividing multi-channel audio signals into a base layer and an enhancement layer, wherein the base layer includes at least one full-band audio channel, the enhancement layer contains at least one full-band channel; the number of full-band channels included in the base layer is not greater than the number of full-band cha...

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Abstract

The present invention provides a method for encoding multichannel digital audio, comprising: dividing multichannel audio into a base layer and at least one enhancement layer; configuring the number of bytes for the base layer and the at least one enhancement layer respectively; and encoding the base layer and the at least one enhancement layer respectively. According to the present invention, decrease of the encoding efficiency that is caused by fine layering is avoided to some extent, and at the same time, applications such as digital audio broadcast in some fields are satisfied. The implementation of the present invention is easy, optimal comprehensive sound quality is obtained by flexibly controlling the quality of a sound channel at each layer, channel encoding requirements are easy to be satisfied, and various limiting conditions during fine layering are not required, thereby ensuring compression at higher efficiency.

Description

technical field [0001] The invention relates to the field of audio encoding processing, in particular to a method for encoding multi-channel digital audio. Background technique [0002] In the field of layered audio coding for multi-channel digital audio, there have been methods for lossy digital audio coding and lossless audio coding techniques in a fine layered manner, such as ISO / IEC14496-3MPEG-4BSAC (Bitslicedarithmeticcoding) bit slice arithmetic coding, In AVS (Audio Videocoding Standard Workgroup of China), the encoding method similar to MPEG-4BSAC and the lossless enhancement layer method of MPEG-4SLS (Scalable Lossless Coding) can realize fine layering of audio and encode each layer separately. However, the fine layering method has shortcomings such as too fine layering, requiring a lot of auxiliary information, low coding efficiency, complex structure, and high processing logic complexity. [0003] There is also a non-fine layered coding scheme in the prior art: t...

Claims

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Application Information

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IPC IPC(8): G10L19/008G10L19/24
CPCG10L19/008G10L19/24
Inventor闫建新王磊
Owner广东广晟研究开发院有限公司