Encoding and decoding method, device and equipment appartus of intra-frame prediction mode and readable storage medium
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A technology of intra-frame prediction mode and coding method, which is applied in the field of video processing and can solve problems such as high bit overhead.
Active Publication Date: 2019-08-23
ZHEJIANG DAHUA TECH CO LTD
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[0005] However, the traditional encoding technology of intra prediction mode still has the problem of high bit overhead
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example 1
[0195] Example 1: Take N=2, the selection of adjacent data blocks is image 3 In the two adjacent data blocks L and A, the search order is L>A; the reference line 0 selects scheme 1, and the reference line >0 selects scheme A; assuming that the mode of L block is Planar and the mode of A is 2, then refer to The MPM set of line 0 is: MPM[0]=Planar, MPM[1]=DC, MPM[2]=2, MPM[3]=65, MPM[4]=3, MPM[5]=64; all The MPM set with the reference line>0 is: MPM[0]=2, MPM[1]=65, MPM[2]=3, MPM[3]=64.
example 2
[0196] Example 2: Take N=5, the selection of adjacent data blocks is image 3 There are 5 adjacent data blocks in L, A, BL, AL, and AR, and the search order is the first type; the reference line 0 selects scheme one, and the reference line>0 selects scheme A; if the mode of the L block is assumed to be 2, A The mode of BL is 2, the mode of BL is 65, the mode of AL is 66, and the mode of AR is 66, then the MPM set of reference line 0 is: MPM[0]=2, MPM[1]=65, MPM[2] =66, MPM[3]=Planar, MPM[4]=DC, MPM[5]=64; the MPM set of all reference lines>0 is: MPM[0]=2, MPM[1]=65, MPM[ 2]=66, MPM[3]=64.
example 3
[0197] Example 3: Take N=2, the selection of adjacent data blocks is image 3 In the two adjacent data blocks L and A, the search order is L->A; the reference line 0 selects scheme 2, and the reference line >0 selects scheme A; assuming that the mode of L block is 2, and the mode of A is DC, then The MPM set of reference line 0 can be constructed as: MPM[0]=DC, MPM[1]=2, MPM[2]=Planar, MPM[3]=65, MPM[4]=3, MPM[5]= 64; the MPM set of all reference lines>0 is: MPM[0]=2, MPM[1]=65, MPM[2]=3, MPM[3]=64.
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Abstract
The invention relates to a an encoding and decoding method, device and appartus of an intra-frame prediction mode and a readable storage mediumcoding and decoding method and device for an intra-frameprediction mode, equipment and a readable storage medium. The coding method of the intra-frame prediction mode comprises the following steps: constructing a most probable prediction mode MPM candidatelist of a current data block according to an intra-frame prediction mode adopted by a plurality of adjacent data blocks of the current data block; wherein each intra-frame prediction mode in the MPMcandidate list is ranked according to the correlation between each adjacent data block and the current data block from large to small; determining an MPM set of the current data block according to theMPM candidate list of the current data block; obtaining a target intra-frame prediction mode of the current data block according to the MPM set of the current data block; and if the target intra-frame prediction mode exists in the MPM set of the current data block, encoding the target intra-frame prediction mode according to the sequence of the target intra-frame prediction mode in the MPM set, and determining a code word of the target intra-frame prediction mode. According to the method, the cCode word length of the target intra-frame prediction mode of the current data block is reduced, andthe bit cost is reduced.
Description
technical field [0001] The present application relates to the technical field of video processing, and in particular to a codec method, device, device and readable storage medium of an intra prediction mode. Background technique [0002] In order to reduce the resources occupied by video data storage or transmission, it is usually necessary to encode (i.e. compress) the video data. The encoded data is called a video code stream, and the video code stream is transmitted to the client through a wired or wireless network, and then Decode and watch. The entire video coding process includes prediction, transformation, quantization, coding and other processes. [0003] Video is formed by continuous playback of many still images, and each still image can be regarded as a frame; since the pixel values of similar pixels in a frame are usually relatively close, the color generally does not change suddenly, so This spatial correlation can be used for compression, and this technique...
Claims
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