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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.

Inactive Publication Date: 2008-06-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to provide an expandable digital audio coding framework, which solves the problem of insufficient compatibility and uniformity of the general part and the extended part, so that voice and music can get better coding quality

Method used

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  • Expandable digital audio encoding frame and expansion method thereof
  • Expandable digital audio encoding frame and expansion method thereof
  • Expandable digital audio encoding frame and expansion method thereof

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Embodiment Construction

[0034] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] like figure 1 As shown, the scalable digital audio coding framework as a whole includes a core encoder 110 , a bandwidth extension module 120 , a stereo module 130 , and a stream formatter 140 . The PCM stream enters the core encoder 110 , the bandwidth extension module 120 , and the stereo module 130 at the same time.

[0036] The core encoder 110 monophonically sums and encodes the music signal or voice signal in the incoming PCM stream, and sends it to the code stream formatter 140 , where the code stream formatter 140 forms an output code stream. The core encoder 110 includes three sub-modules, which are speech and non-speech discrimination module 111 , general audio encoder 112 , and speech encoder 113 .

[0037] With the development of mobile communication, voice communication is developing into audio communication, and the audio...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G10L19/14G10L21/02G10L11/02H03M7/30H04N7/24G10L19/16
Inventor 陈睿
Owner ZTE CORP
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