Lossless codec extension method based on AVS lossy audio

A technology of lossless encoding and extension method, which is applied in the field of lossless encoding and decoding expansion based on AVS lossy audio, and can solve problems such as sacrificing audio quality.

Inactive Publication Date: 2011-11-30
中科开元信息技术(北京)有限公司
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Problems solved by technology

While obtaining higher compression effect, certain audio quality will be sacrificed

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  • Lossless codec extension method based on AVS lossy audio
  • Lossless codec extension method based on AVS lossy audio
  • Lossless codec extension method based on AVS lossy audio

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Embodiment Construction

[0040] I. Overview

[0041] The present invention consists of the following parts:

[0042] 1) AVS audio backward compatible lossless extension: analyze based on the AVS audio standard, for the codec syntax of the fixed code stream structure, the lossless codec extension method based on AVS lossy audio of the present invention makes full use of the AVS audio standard The reserved words, redefine the reserved words, expand the lossless function options, and store the lossless audio data in the padding area by multiplexing the padding area after the AVS audio lossy data area to realize the coexistence of lossy and lossless signals.

[0043] Key technical points on backward compatibility:

[0044] (1) Extend the definition of the reserved words in the AVS lossy audio technology standard, such as the extended lossy and lossless coexistence mode in CodingProfile, and the pure lossless mode; as required, additional coding mode definitions can be added for residual lossless extens...

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Abstract

The invention relates to a lossless codec extension method based on AVS lossy audio. A lossless encoding extension method based on AVS lossy audio, the method analyzes based on the AVS audio standard, redefines reserved words in the AVS audio standard, expands lossless function options, and multiplexes the AVS audio lossy data area The padding area, the lossless audio data is stored in the padding area to realize the coexistence of lossy and lossless signals. Because the improved technology of the method is simple and efficient, it can be easily applied to the field of digital audio to provide a lossless audio decoding solution.

Description

technical field [0001] The invention relates to audio codec technology, in particular to a lossless codec extension method based on AVS lossy audio. Background technique [0002] China's digital audio and video standards have been gradually applied in various fields, and the third part of the AVS standard audio standard has also been adopted in some fields. For example, China's independent CBHD standard specifies AVS audio as one of its audio formats. However, in order to achieve a higher compression effect, the existing AVS audio adopts perceptual coding technology, which belongs to lossy audio codec. While obtaining higher compression effect, certain audio quality will be sacrificed. In recent years, with the development of information technology and users' demand for high-quality audio, the demand for lossless audio has become stronger and stronger. Therefore, on the basis of the original lossy standard of AVS, there will be more and more application requirements to exp...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/04
Inventor 杨新辉刘任化
Owner 中科开元信息技术(北京)有限公司
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