Mapping method, encoder, decoder and computer storage medium
AssigneeGuangdong Oppo Mobile Telecommunications Corp., Ltd.
InventorsJunyan Huo, Yanzhuo Ma, Shuai Wan, Fuzheng Yang, Xinwei Li, Haixin Wang
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Abstract
Disclosed in the implementations of the present disclosure are a mapping method, an encoder, a decoder, and a computer storage medium. The method may include: determining an intra prediction mode used at the time of encoding or decoding a current block; mapping, if the intra prediction mode is a MIP mode, the MIP mode to a first non-MIP mode; and mapping, if the intra prediction mode is a non-MIP mode, the non-MIP mode to a second MIP mode.
Claims18
A method for decoding a picture, applied to a decoder, wherein the method comprises:
- determining an intra prediction mode for a current block;
- when the intra prediction mode is a Matrix-based Intra Prediction (MIP) mode,
- deriving a prediction mode of luma component of the current block by using the MIP mode;
- and
- mapping the MIP mode to PLANAR mode in a derivation of chroma prediction mode of the current block, and
- when the intra prediction mode is determined based on a color component of the current block, mapping the intra prediction mod to a second MIP mode.
A decoder, comprises a processor and a storage medium storing instructions executable by the processor, the storage medium relying on the processor to execute an operation through a communication bus, and when the instructions are executed by the processor, the processor is configured to:
- derive a prediction mode of luma component of the current block by using the MIP mode;
- and
- map the MIP mode to PLANAR mode in a derivation of chroma prediction mode of the current block, and
- when the intra prediction mode is determined based on a color component of the current block, mapping the intra prediction mod to a second MIP mode.
A method for encoding a picture, applied to an encoder, wherein the method comprises:
- determining an intra prediction mode for a current block;
- when the intra prediction mode is a Matrix-based Intra Prediction (MIP) mode,
- deriving a prediction mode of luma component of the current block by using the MIP mode;
- and
- mapping the MIP mode to PLANAR mode in a derivation of chroma prediction mode of the current block, and
- when the intra prediction mode is determined based on a color component of the current block, mapping the intra prediction mod to a second MIP mode.
An encoder, comprises a processor and a storage medium storing instructions executable by the processor, the storage medium relying on the processor to execute an operation through a communication bus, and when the instructions are executed by the processor, the processor is configured to:
- determine an intra prediction mode for a current block;
- when the intra prediction mode is a Matrix-based Intra Prediction (MIP) mode,
- derive a prediction mode of luma component of the current block by using the MIP mode;
- and
- map the MIP mode to PLANAR mode in a derivation of chroma prediction mode of the current block;
- wherein no Most Probable Modes List (MPM) is derived, and
- when the intra prediction mode is determined based on a color component of the current block, map the intra prediction mod to a second MIP mode.
Dependencies are inferred from the claim text.