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Encoding method and device and decoding method and device

A technology of encoding method and decoding method, which is applied in the direction of image communication, digital video signal modification, electrical components, etc., can solve the problems of not being able to make full use of the intra-frame brightness prediction mode correlation, etc., and achieve the effect of improving efficiency

Active Publication Date: 2018-09-25
HFI INNOVATION INC
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Problems solved by technology

However, the coding schemes considered above for intra luma prediction modes may not be able to fully utilize the correlation of adjacent intra luma prediction modes, thus further improving their performance

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  • Encoding method and device and decoding method and device
  • Encoding method and device and decoding method and device
  • Encoding method and device and decoding method and device

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[0016] Motion compensated inter-frame coding has been widely adopted by various coding standards, such as MPEG-1 / 2 / 4 and H.261 / H.263 / H.264 / AVC. Although motion-compensated inter-frame coding can effectively reduce the bit rate of compressed video, intra mode coding (intra mode coding) is still required to process I-pictures (I-pictures) or I-blocks (I-blocks) for fast access to compressed video. video data or reduce error propagation. Intra prediction can exploit spatial correlation in an image or image region. In order to further improve coding efficiency, the High-Efficiency Video Coding (HEVC) standard under development makes extensive use of block-based spatial prediction. In HEVC, multiple intra prediction modes are used to utilize spatial characteristics, and the number of intra prediction modes depends on the block size of a prediction unit (Prediction Unit, PU). For example, HEVC under development allows intra prediction of luma blocks (ie, PUs) of sizes 64x64, 32x32...

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Abstract

The invention provides a coding / decoding method and device applied to a block intra-frame prediction mode; the encoding method comprises the following steps: receiving a present intra-frame prediction mode corresponding to the current block; receiving a first and second frame adjacent intra-frame prediction modes corresponding to the first and second adjacent blocks; determining a plurality of mode candidates according to the first and second adjacent intra-frame prediction modes, wherein the mode candidates comprise the first mode candidate and the second mode candidate; providing coded expression of the current intra-frame prediction mode, wherein the coded expression comprises a first grammar element used for indicating whether the current intra-frame prediction mode is same with one of the mode candidates or not, if yes, the coded expression also comprises a second grammar element indicating the mode candidate identical to the current intra-frame prediction mode. The method and device can improve the coding intra-frame prediction mode efficiency.

Description

[0001] This application is a divisional application of Chinese patent application 201180063914.7. The filing date of the original application is July 5, 2011. The invention titles are: encoding method and device, and decoding method and device. [0002] Cross References to Related Applications [0003] This application claims priority from U.S. Provisional Application No. 61 / 430,701, filed January 7, 2011, entitled "Improved Intra Prediction Mode Coding Method," and filed January 31, 2011, US Provisional Application No. 61 / 437,910, entitled "Improved Intra Prediction Mode Coding Method." The entire contents of said application are hereby incorporated by reference. technical field [0004] The present invention relates to video coding, and in particular to coding techniques related to intra luma prediction mode. Background technique [0005] Motion compensated inter-frame coding has been widely adopted by various coding standards, such as MPEG-1 / 2 / 4 and H.261 / H.263 / H.264 / A...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/196H04N19/593H04N19/463
CPCH04N19/196H04N19/463H04N19/593
Inventor 国玫郭峋雷少民
Owner HFI INNOVATION INC
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