Codec method, device, device and readable storage medium for intra-frame prediction mode
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An intra-frame prediction mode and coding method technology, applied in the field of video processing, can solve problems such as large bit overhead, and achieve the effects of increasing probability, reducing codeword length, and reducing bit overhead
Active Publication Date: 2021-04-27
ZHEJIANG DAHUA TECH CO LTD
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[0005] However, the current encoding technology of intra prediction mode still has the problem of high bit overhead
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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 Image 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 da...
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Abstract
The present application relates to a codec method, device, device and readable storage medium of an intra prediction mode. The encoding method of the intra-frame prediction mode includes: according to the statistical times of each intra-frame prediction mode adopted by the encoded data block, constructing the most probable prediction mode MPM candidate list of the current data block; according to the MPM candidate list of the current data block, Determine the MPM set of the current data block; obtain the target intra prediction mode of the current data block according to the MPM set of the current data block; if there is a target intra prediction mode in the MPM set of the current data block, then according to the target intra prediction mode in The sequence in the MPM set encodes the target intra-frame prediction mode, and determines the codeword of the target intra-frame prediction mode. The method reduces the codeword length of the target intra-frame prediction mode of the current data block and reduces the bit overhead.
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...
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