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Reinforced pixel domain code stream conversion method

A code stream conversion and pixel domain technology, applied in the field of enhanced pixel domain code stream conversion

Active Publication Date: 2005-11-23
SHANGHAI GMT DIGITAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method is only suitable for transcoding between compression formats with basically the same algorithm

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  • Reinforced pixel domain code stream conversion method
  • Reinforced pixel domain code stream conversion method
  • Reinforced pixel domain code stream conversion method

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Embodiment Construction

[0039] In order to facilitate the understanding of the enhanced pixel domain code stream conversion method of the present invention (in fact, the MPEG-2 code stream is converted into an AVS code stream), a brief introduction is made to digital video transcoding first: digital video transcoding is to encode end-to-end processing of video data from one format to another. The so-called format includes encoding standard, spatial resolution, frame rate, data transmission rate, etc., and any change in any of these features is considered to have transcoding. Here, the main transcoding between different encoding standards, that is, the spatial resolution and frame rate of the video before and after transcoding do not change, but the encoding standard has changed. Of course, it must be accompanied by a change in the data transmission rate.

[0040] What we want to transcode are two different standards. First, we need to compare the similarities and differences of these two standards. ...

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Abstract

This invention discloses one method to strengthen picture element area codes, which comprises the following steps: a, decoding the input codes of MPEG-2 input code flow; outputting decoding information besides the video data of YUV form; if each frame of image coding mode, each macro coding mode; then making full use of MPEG-2 decoding to get output information and re-coding the YUV form visual data for AVS data; finally coding, and considering the characteristics of MPEG-2 and AV codes with quality and speed.

Description

technical field [0001] The invention relates to the technical field of audio and video encoding and decoding in signal processing, in particular to an enhanced pixel domain code stream conversion method. Background technique [0002] At present, digital TV program broadcasting (via satellite, cable or terrestrial wireless channel), digital video disc / high-definition digital video disc / enhanced universal disc (DVD / HD-DVD / EVD) publishing and digital video recorder (DV) are widely used. The source encoding standard is MPEG-2. MPEG-2 was a standard established ten years ago, and the formulation of these information source coding standards was based on the compression technology level and integrated circuit technology level at that time. [0003] In recent years, a number of digital audio and video codec standards have emerged, the representative ones are the international standard MPEG-4, H.264 / MPEG-4 AVC, the standard AVS independently formulated by my country, and the WM9 lau...

Claims

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Application Information

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IPC IPC(8): H04N19/137H04N19/625H04N21/4405H04N21/4408
Inventor 王国中赵海武陈勇李国平李萍周恒侯钢
Owner SHANGHAI GMT DIGITAL TECH
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