Video coding switching system from MPEG to AVS

Abstract

The invention discloses a video coding switching system from MPEG to AVS. A coding transcoder of the system completely decodes MPEG video data for demultiplexed output to a pixel region and performs AVS coding by combining a DCT intra-frame predicative mode judgment module and a motion vector reuse and intra-frame macro block mode judgment module and is then transmitted to an MPEG system layer multiplexing module; the DCT intra-frame predicative mode judgment module in a converter decodes by utilizing VLC of the input code stream and performs intra-frame predicative mode judgment with the DCTcoefficient after inverse quantization; the motion vector reuse submodule in the motion vector reuse and intra-frame macro block mode judgment module uses the motion vector MV in the MPEG code streamas the reference of AVS motion estimation to obtain half-pixel precision motion vector MV after optimization of the motion vector MV; and the intra-frame macro block mode judgment submodule decodes the macro block through the MPEG and judges the coding type of the AVS macro block to divide the size. The invention avoids complex decoding-recoding processing, requires extremely low calculated amount, can realize MPEG-AVS transcoding in a software manner, provides AVS program source and promotes the application development of AVS standard.

Description

technical field [0001] The invention relates to a video encoding technology, in particular to a system for realizing conversion of two video encodings by using a software method. Background technique [0002] With the rapid development of digital multimedia technology, multiple standards coexist in the field of multimedia applications. AVS (Audio Video coding Standard) is a standard formulated by the audio and video coding and decoding technology standard working group approved by the Science and Technology Department of the Ministry of Information Industry of China in June 2002. It has China's independent intellectual property rights. The AVS standard will be widely used in fields such as digital TV, IPTV and mobile multimedia services. [0003] However, because the industrialization of the AVS standard is still in its infancy, and there are few digital multimedia resources that meet the AVS standard, there is an urgent need for hardware or software products that can provi...

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Problems solved by technology

[0003] However, since the industrialization of the AVS standard is still in its infancy, and there are few digital multimedia resources that meet the AVS standard, there is an urgent need for hardware or software products that can provide AVS format in practical applications.

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