Invention Publication
- Patent Title: METHOD AND APPARATUS OF CROSS-COMPONENT LINEAR MODELING FOR INTRA PREDICTION
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Application No.: US18427084Application Date: 2024-01-30
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Publication No.: US20240171773A1Publication Date: 2024-05-23
- Inventor: Alexey Konstantinovich FILIPPOV , Vasily Alexeevich RUFITSKIY , Jianle CHEN , Xiang MA
- Applicant: HUAWEI TECHNOLOGIES CO., LTD.
- Applicant Address: CN Shenzhen, Guangdong
- Assignee: HUAWEI TECHNOLOGIES CO., LTD.
- Current Assignee: HUAWEI TECHNOLOGIES CO., LTD.
- Current Assignee Address: CN Shenzhen, Guangdong
- Main IPC: H04N19/593
- IPC: H04N19/593 ; H04N19/105 ; H04N19/167 ; H04N19/176 ; H04N19/186

Abstract:
Apparatuses and methods for encoding and decoding are provided. The method for intra predicting a chroma sample of a block by applying cross-component linear model includes: obtaining reconstructed luma samples; determining maximum and minimum luma sample values based on the reconstructed luma samples; obtaining a difference of the maximum and minimum luma sample values. The method also includes: fetching a value out of a lookup table (LUT) by using a set of bits as an index, the set of bits following a position of the most-significant bit; obtaining linear model parameters based on the fetched value; and calculating a predicted chroma sample value by using the obtained linear model parameters. The efficiency to fetch the value out of the LUT is increased.
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