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Intra-frame prediction mode selection method and system

An intra-frame prediction mode and intra-frame prediction technology, which is applied in the field of image processing and can solve problems such as high computational complexity and difficult hardware design.

Inactive Publication Date: 2012-03-14
FUJITSU LTD
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  • Claims
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Problems solved by technology

However, the RDO technology needs to search all the intra-frame prediction types and intra-frame prediction modes in order to select the best intra-frame prediction type and intra-frame prediction mode, so its computational complexity is very high. In terms of hardware design hard to accomplish

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  • Intra-frame prediction mode selection method and system

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[0023] Features and exemplary embodiments of various aspects of the invention will be described in detail below. The following description covers numerous specific details in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a clearer understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configuration and algorithm presented below, but covers any modification, replacement and improvement of related elements, components and algorithms without departing from the spirit of the present invention.

[0024] In the H.264 standard, the size of the prediction block used to predict any luma macroblock included in the luma component frame can be 4×4, 8×8, or 16×16. Among them, ...

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Abstract

The invention discloses an intra-frame prediction mode selection method and an intra-frame prediction mode selection system. The method comprises the following steps of: selecting one of Intra_4*4, Intra_8*8 and Intra_16*16 as an intra-frame prediction type of a current macroblock according to a frequency characteristic of the current macroblock; when the Intra_16*16 is selected, selecting one of intra-frame prediction modes which is selectable for the Intra_16*16 and has the minimum prediction error as the intra-frame prediction mode of the current macroblock; and when the Intra_8*8 or the Intra_4*4 is selected, dividing the current macroblock into four 8*8 pixel matrixes, namely B0, B1, B2 and B3 or 16 4*4 pixel matrixes from D0 to D15; and as to any 8*8 pixel matrix bi or 4*4 pixel matrix Dj, selecting a prediction direction for the pixel matrix Bi or Dj according to the relevance among the pixels in the pixel matrix Bi or Dj, and selecting one of the intra-frame prediction modes which is selectable for the Intra_8*8 or the Intra_4*4 and has the minimum prediction error in the prediction direction for the pixel matrix Bi or Dj as the intra-frame prediction mode of the pixel matrix Bi or Dj.

Description

technical field [0001] The present invention relates to the field of image processing, and more particularly relates to a method and system for selecting an intra-frame prediction mode. Background technique [0002] H.264 is the latest international video coding standard jointly developed by the International Telecommunication Union (ITU) and the International Organization for Standardization (ISO). In the H.264 standard, intra-frame prediction is an important technology to improve compression efficiency, that is, during the encoding process, for a certain area (usually a rectangular block) to be encoded in the video image, search The most similar and already coded block is used to predict the current block to be coded. [0003] For color video images, each frame of video image includes a luma component frame and a chroma component frame. For luma component frames, the H.264 standard has two prediction types: Intra_16×16 (ie, 16×16 intra prediction) and Intra_4×4 (ie, 4×4 ...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/32H04N19/103H04N19/50
Inventor 王争
Owner FUJITSU LTD
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