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Backward-prediction method based on spatio-temporal neighbor information

A backward prediction, space-time technology, applied in the field of video coding, can solve the problems of reducing compression efficiency and increasing the number of coding bits, so as to achieve the effect of improving compression efficiency and reducing the number of bits

Inactive Publication Date: 2012-01-11
WUHAN UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to provide a backward prediction method based on spatio-temporal neighbor points, which can improve the problem that the forward prediction must encode motion vector side information, which leads to an increase in the number of coding bits and a reduction in compression efficiency.

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  • Backward-prediction method based on spatio-temporal neighbor information
  • Backward-prediction method based on spatio-temporal neighbor information
  • Backward-prediction method based on spatio-temporal neighbor information

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Embodiment Construction

[0028] The backward prediction method based on spatio-temporal neighbor information proposed by the present invention uses the content similarity of the temporal domain and spatial domain neighbor pixels of the current image and the current encoding block according to the characteristics that the video belongs to a steady state distribution in a small range and has temporal and spatial similarity. To linearly predict the pixel value of the current coding block, specifically adopt the following technical solutions, such as figure 1 shown, including the following steps:

[0029] 1. Select local spatial domain neighbor pixels (11), this step selects the pixels of the coded blocks around the current coded block in the current image to perform linear prediction;

[0030] 2, select local time domain neighbor pixel (12), this step selects the pixel point in the reference frame of current image to be used for carrying out linear prediction;

[0031] 3, the spatio-temporal sample trai...

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Abstract

The invention relates to the technical field of video coding, in particular to a back-forecast method based on spatio-temporal neighbor information. The method comprises the following steps of: selecting local air space neighbor pixel, selecting local time domain neighbor pixel, setting spatio-temporal sample training window, solving linear forecast weight matrx, executing the back forecast basedon spatio-temporal neighbor points, and integrating forecast modes. The invention combines a forward forecast mode in the existing standard by increasing a frame-to-frame macro-block forecast mode based on the back-forecast, thereby improving the frame-to-frame forecast efficiency.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a backward prediction method based on spatio-temporal neighbor information. Background technique [0002] Compared with the previous video coding standards, the latest international video standard H.264 / AVC has made significant progress in compression performance. The reason why the H.264 standard can achieve such a large gain is because it introduces many advanced Video coding technology, one of the most important technologies is the inter-frame prediction technology based on block matching. [0003] The inter-frame prediction technology based on block matching is a "forward prediction" technology. This method is characterized in that the encoding end obtains the corresponding motion vector by performing motion estimation on the original image and packages it and transmits it to the decoding end; the decoding end passes The corresponding reconstructed image can be ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/32H04N19/105H04N19/109H04N19/503
Inventor 胡瑞敏陈皓钟睿毛丹
Owner WUHAN UNIV