Encoding and decoding method and device for intra-frame prediction mode, equipment 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 the problems of high bit overhead
Active Publication Date: 2019-07-26
ZHEJIANG DAHUA TECH CO LTD
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[0005] However, the current encoding technology of intra
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example 1
[0108] Example 1: get M=6, statistical array S[67], and replace all special patterns with elements in this statistical array;
[0109] If L and A modes are the same, and L=S[2]:
[0110] MPM[6]={L, S[0], S[1], S[3], S[4], S[5]};
[0111] If L and A patterns are not the same, and L=S[1], A=S[6]:
[0112] MPM[6]={L, A, S[0], S[2], S[3], S[4]};
example 2
[0113] Example 2: get M=3, statistical array S[67], and replace N=1 special patterns with elements in this statistical array;
[0114] If L and A have the same pattern, and L! =Planar, L=S[2], S[0]! =Planar:
[0115] MPM[3] = {L, Planar, S[0]};
[0116] If L and A patterns are not the same, and L=S[0], A=S[6]:
[0117] MPM[3]={L,A,S[1]};
example 3
[0118] Example 3: get M=6, statistics array S[67], and replace N=2 special patterns with elements in this statistics array,
[0119] If L and A modes are the same, and L is not equal to Planar, DC or V mode, and L=S[1], S[0]=DC, S[3]=Planar, S[2] and S[4] are not is equal to V:
[0120] MPM[6]={L, Planar, DC, V, S[2], S[4]};
[0121] If L and A patterns are not the same, and L=S[1], A=S[2], S[3]=Planar, S[0] and S[4] are not equal to DC:
[0122] MPM[6]={L, A, Planar, DC, S[0], S[4]}.
[0123] In one embodiment, such as Figure 6 As shown, a decoding method of the intra prediction mode is provided, and the method is applied to the decoding end as an example for illustration, including the following steps:
[0124] S601. Construct the most probable prediction mode MPM candidate list of the current data block according to the statistical times of each intra-frame prediction mode adopted by the decoded data block; the decoded data block includes: at least one of the decoded d...
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Abstract
The invention relates to a coding and decoding method and device for an intra-frame prediction 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) candidate list of a current data block according to the statistical number of times of each intra-frame prediction mode adopted by a coded data block; determining an MPM set of the current data block according to the MPM 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 code word length of the target intra-frame prediction mode of the current data block is reduced, and the 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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