Fast mode decision algorithm for intra prediction for advanced video coding

An intra-frame prediction and encoding technology, applied in the field of digital video encoding and compression, can solve the problems of encoder complexity and large amount of calculation

Inactive Publication Date: 2006-06-28
AGENCY FOR SCI TECH & RES
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  • Claims
  • Application Information

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Problems solved by technology

As a result, the complexity and computation of the encoder is very large

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  • Fast mode decision algorithm for intra prediction for advanced video coding
  • Fast mode decision algorithm for intra prediction for advanced video coding
  • Fast mode decision algorithm for intra prediction for advanced video coding

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Embodiment Construction

[0020] The present invention discloses a method, device and computer program product for AVC intra-frame prediction to encode digital video including multiple images. Although only a few examples have been disclosed herein, it will be apparent to those skilled in the art that many changes and / or substitutions can be made without departing from the scope and spirit of the invention. In other instances, details well known to those skilled in the art have been omitted in order to obscure the present invention.

[0021] Embodiments of the present invention provide a fast decision algorithm for AVC intra prediction based on local edge direction information, which reduces the calculation amount of intra prediction. According to the edge information in the predicted image block, a piece of local edge direction information, edge direction field or other forms of edge direction information can be generated for each image block. According to the edge direction information, a small numb...

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Abstract

The present invention discloses a method (400) and apparatus for AVC intra prediction for encoding digital video comprising multiple images. The method includes the following steps: generating (410) edge direction information for each intra-frame coding block of the digital image; selecting (420) the most likely intra-frame prediction mode according to the generated edge direction information for rate-distortion optimization. The above-mentioned edge direction information can be generated by applying at least one edge operator to the digital image. The edge direction histogram can be used to accumulate the magnitudes of pixels in 15 directions within the coding block. The method may further comprise the step of intra-coding (430) a block of the digital image with the selected most likely intra-frame prediction mode.

Description

technical field [0001] The present invention relates generally to the processing of digital video, and more particularly to the encoding and compression of digital video. Background technique [0002] In order to obtain the highest coding efficiency, Advanced Video Coding (AVC) uses rate-distortion optimization (RDO) technology to obtain the best coding results, that is, the coding quality is the best while the data bits formed are the smallest. Advanced video coding includes AVC, H.264, MPEG-4 Part 10, and JVT. For more information about AVC, see ITU-T Recording H.264|ISO / IEC14496-10 AVC in the "Joint Final Committee Draft for Joint Video Specification (JFCD)" Klagenfurt, Austria, July 22-26, 2002 . To obtain RDO, the encoder uses all combinations of modes to fully encode the video. This combination of modes includes different intra and inter prediction modes. As a result, the complexity and calculation amount of video coding in AVC are greatly increased, so it is diffi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/50H04N7/26H04N19/593
CPCH04N19/176H04N19/147H04N19/61H04N19/593H04N19/11H04N19/14
Inventor 潘峰林晓苏山多·拉哈德贾林庆帆李政国冯革楠吴达军吴思
Owner AGENCY FOR SCI TECH & RES
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