Information processing method and device, apparatus, and storage medium
An information processing method and device, an apparatus, and a storage medium. The method includes: for inputted source video data, predicting a colour component of a coding block in the source video data according to a prediction mode to obtain a first prediction block, wherein the prediction mode is preset and is a Position-Dependent Prediction Combination (PDCP) mode; determining a difference between the colour component of the coding block and a prediction value of the first prediction block to obtain a residual block; and signalling the residual block and the prediction mode in a bitstream.
1 . A method for processing information, applied to a decoder, comprising:
obtaining a prediction mode, predicting a colour component of a coding block according to the prediction mode to obtain a prediction block, wherein the prediction mode is preset and is a Position-Dependent Prediction Combination (PDPC) mode,
wherein the colour component of the coding block is predicted according to the prediction mode to obtain the prediction block when any of the following conditions is met:
when the coding block is a chroma block, and the prediction mode is an angular prediction mode with an index smaller than or equal to 8; or,
when the coding block is a chroma block, and the prediction mode is an angular prediction mode with an index greater than or equal to 60;
refining the prediction block according to the prediction mode to obtain a refinement block.
2 . The method of claim 1 , wherein the colour component is a luma component.
3 . The method of claim 2 , further comprising:
performing a luma prediction on a luma value of the coding block according to the prediction mode to obtain the prediction block.
4 . The method of claim 1 , wherein the colour component is a chroma component.
5 . The method of claim 4 , further comprising:
performing a chroma prediction on a chroma value of the coding block according to the prediction mode to obtain the prediction block.
6 . A method for processing information, applied to an encoder, comprising:
predicting a colour component of a coding block according to a prediction mode to obtain a prediction block, wherein the prediction mode is preset and is a Position-Dependent Prediction Combination (PDPC) mode, wherein the colour component of the coding block is predicted according to the prediction mode to obtain the prediction block when any of the following conditions is met:
when the coding block is a chroma block, and the prediction mode is an angular prediction mode with an index smaller than or equal to 8; or,
when the coding block is a chroma block, and the prediction mode is an angular prediction mode with an index greater than or equal to 60;
refining the prediction block according to the prediction mode to obtain a refinement block; and
determining a difference between the coding block and the refinement block to obtain a residual block; and
signalling the residual block and the prediction mode in a bitstream.
7 . The method of claim 6 , wherein the colour component is a luma component.
8 . The method of claim 7 , further comprising:
performing a luma prediction on a luma value of the coding block according to the prediction mode to obtain the prediction block.
9 . The method of claim 6 , wherein the colour component is a chroma component.
10 . The method of claim 9 , further comprising:
performing a chroma prediction on a chroma value of the coding block according to the prediction mode to obtain the prediction block.
11 . A video decoding apparatus, comprising a memory and a processor, wherein the memory stores a computer program which is runnable on the processor, and the processor implements following acts when executing the program:
obtaining a prediction mode, predicting a colour component of a coding block according to the prediction mode to obtain a prediction block, wherein the prediction mode is preset and is a Position-Dependent Prediction Combination (PDPC) mode,
wherein the colour component of the coding block is predicted according to the prediction mode to obtain the prediction block when any of the following conditions is met:
when the coding block is a chroma block, and the prediction mode is an angular prediction mode with an index smaller than or equal to 8; or,
when the coding block is a chroma block, and the prediction mode is an angular prediction mode with an index greater than or equal to 60;
refining the prediction block according to the prediction mode to obtain a refinement block.
12 . The video decoding apparatus of claim 11 , wherein the colour component is a luma component.
13 . The video decoding apparatus of claim 11 , wherein the colour component is a chroma component.