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AVS video coding based fast intraframe predicting mode selecting method

A technology of inter-frame prediction mode and prediction mode, which is applied in the direction of digital video signal modification, television, electrical components, etc.

Active Publication Date: 2008-03-12
INESA ELECTRON
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Problems solved by technology

If the decision threshold can be properly selected, the all-zero block pre-judgment criterion will not cause image quality degradation

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  • AVS video coding based fast intraframe predicting mode selecting method
  • AVS video coding based fast intraframe predicting mode selecting method
  • AVS video coding based fast intraframe predicting mode selecting method

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Embodiment Construction

[0026] The method for selecting the fast inter-frame prediction mode of the present invention will be further described in detail below.

[0027] The fast inter-frame prediction mode selection method proposed by the present invention only considers the basic class without B frames, that is, only four inter-frame prediction modes of P frames: 16×16, 16×8, 8×16, 8×8. In addition, video test sequences in two formats, shared intermediate format (CIF: Common Intermediate Format) and quarter shared intermediate format (QCIF: Quarter Common Intermediate Format), are used. It consists of the following steps:

[0028] Step S1, using the 16×16 prediction mode as a candidate mode to predict the current macroblock, if the residual error of the motion estimation of the macroblock satisfies the all-zero block judgment condition, then judge the 16×16 prediction mode as the best prediction mode for the macroblock, and exit the inter prediction mode loop;

[0029] Step S2, if in the 16×16 pr...

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Abstract

The present invention provides a method of quick mode selection for intra prediction based on AVS video coding. The method predicts the current macro-block by choosing a provision mode, and combines a beforehand adjudication guideline of a zero block and a grain complexity pre-selecting block size guideline, to gain the best predication mode of the macro-block. The method can remarkably reduce the computational complexity of the coder while the bit rate and the image quality are maintained, and can be used in real time coding.

Description

technical field [0001] The invention relates to a video inter-frame prediction mode selection method, in particular to a fast inter-frame prediction mode selection method based on AVS video coding. Background technique [0002] AVS1-P2 is the video part of the first advanced audio and video codec standard approved in February 2006 in my country. In video coding, how to reduce computation and improve coding efficiency while maintaining bit rate and image quality as much as possible is crucial. In the whole encoding process, mode selection takes a lot of time, so how to speed up the selection of candidate modes has become one of the research hotspots. For inter-frame prediction, AVS1-P2 supports two inter-frame prediction modes of P frame and B frame. P frame adopts at most 2 forward reference frames; B frame adopts one reference frame before and after. In order to obtain the best rate-distortion performance, the AVS video codec reference program identification number is rm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/32H04N7/26H04N19/109H04N19/147H04N19/176
Inventor 滕国伟石旭利王蕾睿刘锦阳张兆扬
Owner INESA ELECTRON
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