Parameter derivation for intra prediction
AssigneesBeijing Bytedance Network Technology Co., Ltd., Bytedance Inc.
InventorsKai ZHANG, Li ZHANG, Hongbin LIU, Jizheng XU, Yue WANG
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Abstract
A method for video processing is provided. The method includes determining, for a conversion between a current video block of a video and a coded representation of the video, a context that is used to code a flag using arithmetic coding in the coded representation of the current video block, wherein the context is based on whether a top-left neighboring block of the current video block is coded using a cross-component linear model (CCLM) prediction mode; and performing the conversion based on the determining.
Claims20
A method of processing video data, comprising:
- determining, for a conversion between a current video block of a video and a bitstream of the video, parameters for a linear model prediction or cross-color component prediction based on refined neighboring luma samples and chroma samples of the current video block;
- deriving prediction values of a chroma component of the current video block based on the parameters and refined internal luma samples of the current video block;
- and
- performing the conversion based on the prediction values.
An apparatus for processing video data, comprising a processor and a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to:
- determine, for a conversion between a current video block of a video and a bitstream of the video, parameters for a linear model prediction or cross-color component prediction based on refined neighboring luma samples and chroma samples of the current video block;
- derive prediction values of a chroma component of the current video block based on the parameters and refined internal luma samples of the current video block;
- and
- perform the conversion based on the prediction values.
A non-transitory computer-readable recording medium storing a bitstream of a video which is generated by a method performed by a video processing apparatus, wherein the method comprises:
- determining, for a conversion between a current video block of the video and the bitstream of the video, parameters for a linear model prediction or cross-color component prediction based on refined neighboring luma samples and chroma samples of the current video block;
- deriving prediction values of a chroma component of the current video block based on the parameters and refined internal luma samples of the current video block;
- and
- generating the bitstream based on the prediction values.
Dependencies are inferred from the claim text.