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An enhanced in-frame predictive mode coding method

A technology of intra-frame prediction mode and prediction mode, which is applied in the field of video coding and decoding, can solve the problems of improving prediction accuracy and not saving code stream to the greatest extent, and achieve the effect of increasing prediction accuracy and compression rate, and the method is simple and easy

Inactive Publication Date: 2005-09-28
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] However, experiments have shown that in many cases, there is a certain error between the small principle of the prediction model and the actual situation. Since the most likely prediction model value has an advantage in the comparison of the final model, the final model is not the best model, so it cannot maximize Save code stream and improve prediction accuracy

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Embodiment Construction

[0032] The present invention obtains the value law of the best prediction mode of the current block under various combinations of the left adjacent block prediction mode (leftmode) and the upper adjacent block prediction mode (upmode) by making statistics on the prediction modes of a large number of test sequences; Write the most probable optimal mode under various combinations of the prediction mode of the left adjacent block and the prediction mode of the upper adjacent block into a fixed lookup table as the most probable prediction mode (mostProbableMode).

[0033] In the following, the present invention will be further described in detail by taking intra-frame prediction of luminance component in 4*4 mode in AVS as an example. The prediction mode direction defined in AVS is as figure 1 shown.

[0034] The specific encoding process is as follows:

[0035] First define the following variables to facilitate the description of the algorithm:

[0036] Left adjacent block pre...

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Abstract

The present invention belongs to the field of video coding / decoding technology in signal processing, and relates to a predictive pattern coding method in enhancement frame. It is characterized by that utilizing space correlation of texture of adjacent image blocks, according to the relationship of optimum predictive patterns between adjacent blocks statistically defining most-possible predictive pattern list so as to raise the coding predictive accuracy in frame. Said invention also provides the concrete steps of said coding method, and can raise video coding efficiency.

Description

technical field [0001] The invention belongs to the field of video coding and decoding in signal processing, and relates to an enhanced intra-frame prediction mode coding method. Background technique [0002] With the rapid development of communication technology and computer technology, the demand for digital audio and video information is increasing day by day. Due to the huge amount of original video data, in order to save channel transmission bandwidth and storage space, it needs to be compressed and encoded. During the development of video coding technology, a series of international standards have emerged, such as H.261 and H.263 series formulated by ITU-T, and MPEG-1, MPEG-2, and MPEG-4 series formulated by ISO. Currently, the Joint Video Working Group (JVT) established by ISO and ITU has jointly formulated the latest video coding standard H.264 / MPEG-4 Part 10. At home, China's digital audio and video coding technology standard working group (AVS) is developing the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/159H04N19/593
Inventor 朱光喜戴声奎刘文予喻莉
Owner HUAZHONG UNIV OF SCI & TECH
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