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:
May. 20, 2025
Filed:
Feb. 12, 2024
Huawei Technologies Co., Ltd., Guangdong, CN;
Sergey Yurievich Ikonin, Moscow, RU;
Roman Igorevich Chernyak, Moscow, RU;
Timofey Mikhailovich Solovyev, Moscow, RU;
Alexander Alexandrovich Karabutov, Moscow, RU;
Elena Alexandrovna Alshina, Munich, DE;
Jianle Chen, San Diego, CA (US);
HUAWEI TECHNOLOGIES CO., LTD., Shenzhen, CN;
Abstract
A method of obtaining a chrominance quantization parameter (QP) for chrominance components based on a luminance QP for a luminance component, wherein the method is performed by a decoder, and comprises parsing a received bitstream comprising a sequence parameter set (SPS) to obtain the luminance QP and information of a mapping function (ƒ) which associates a QP index (QPi) to a chrominance QP (QPc), wherein the chroma QP mapping table is signaled in the SPS; obtaining the QPi based at least in part on the luminance QP; obtaining the mapping function based on the obtained information of the mapping function; and obtaining a QPc based on the obtained mapping function and the obtained QPi.