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:
Jul. 19, 2022
Filed:
Jul. 06, 2020
Mediatek Inc., Hsinchu, TW;
Chen-Yen Lai, Hsinchu, TW;
Olena Chubach, San Jose, CA (US);
Tzu-Der Chuang, Hsinchu, TW;
Ching-Yeh Chen, Hsinchu, TW;
Chih-Wei Hsu, Hsinchu, TW;
Yu-Wen Huang, Hsinchu, TW;
Abstract
A method for signaling scaling matrices for transform coefficient quantization is provided. A video decoder receives data from a bitstream to be decoded as a current picture of a video. The video decoder determines a plurality of scaling matrices that are used to code the current picture, wherein a first scaling matrix of the plurality of scaling matrices is determined by referencing a previously determined second scaling matrix of the plurality of scaling matrices. The video decoder dequantizes transform coefficients of transform blocks of the current picture by using the determined plurality of scaling matrices. The video decoder reconstructs the current picture by using the dequantized transform coefficients.