Expandable digital audio encoding frame and expansion method thereof

A digital audio and coding technology, applied in the field of audio and video coding, which can solve the problems of insufficient compatibility and uniformity of the general part and the extended part.
CN101202042AInactive Publication Date: 2008-06-18ZTE CORP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZTE CORP
Publication Date
2008-06-18
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses an extensible digital audio coding frame, which comprises: a core coder used for receiving PCM stream; audio signals or speech signals in the PCM stream go through monophony and coding and then are sent out; a bandwidth extended module, which is used for receiving noise signals in the PCM stream, utilizes low frequency components in the noise signals to rebuild high frequency components, and leads leading information to be loaded in coded code stream and then to be sent to a code stream formatter; a stereo module, which is used for receiving stereo signals in the PCM stream and from which stereo parameters are extracted to form assistant bit stream, which is then sent to the code stream formatter; the code stream formatter used for receiving signals sent out from the core coder, the bandwidth extended module and the stereo module, thus forming output code stream. The invention further discloses a digital audio coding extended method.
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Description

technical field

[0001] The invention relates to an audio and video encoding technology, in particular to an expandable digital audio encoding framework and an extension method thereof. Background technique

[0002] AVS standard is the abbreviation of "Audio and Video coding Standard Workgroup of China" (Audio and Video coding Standard Workgroup of China) series standards. AVS includes three main standards of system, video, and audio and supporting standards such as conformance testing. This is an open standard based on my country's innovative technology and open technology, and aims to provide a complete source coding technology solution for China's audio and video industry. . Regardless of the AVS standard or other standards, its physical implementation is a decoding chip or encoding chip.

[0003] In many general digital audio coding frameworks, only a single audio coding method is defined, which does not have scalability, and there are problems of compatibility and unific...

Claims

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