The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2025
Filed:
Dec. 08, 2023
Huawei Technologies Co., Ltd., Guangdong, CN;
Alexey Konstantinovich Filippov, Moscow, RU;
Vasily Alexeevich Rufitskiy, Moscow, RU;
Jianle Chen, San Diego, CA (US);
HUAWEI TECHNOLOGIES CO., LTD., Shenzhen, CN;
Abstract
Devices and methods of directional intra prediction for chroma component of a picture are provided. The method includes obtaining an initial intra prediction mode of the chroma component based on a value of a luma intra prediction mode (intraPredModeY) by using a first look up table (LUT), deriving a chroma intra prediction mode (intraPredModeC) from a second LUT by using the initial intra prediction mode of the chroma component. The chroma component has different subsampling ratios in horizontal and vertical directions. The second LUT has 67 entries, indices for the second LUT are 0-66, and each index is associated with an angle of an intra prediction direction. The method further includes obtaining an angle parameter for the chroma component based on the chroma intra prediction mode intraPredModeC; and obtaining predicted samples of the chroma component based on the angle parameter.