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:
Feb. 19, 2019
Filed:
Jun. 02, 2017
Apple Inc., Cupertino, CA (US);
Mei Guo, San Jose, CA (US);
Feng Yi, San Jose, CA (US);
Jun Xin, Sunnyvale, CA (US);
Chris Y. Chung, Sunnyvale, CA (US);
Yeping Su, Sunnyvale, CA (US);
Xiaosong Zhou, Campbell, CA (US);
Jun Xu, Sunnyvale, CA (US);
Hsi-Jung Wu, San Jose, CA (US);
Jingteng Xue, Santa Clara, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Methods of in-loop deblocking filter for high dynamic range (HDR) video compression are disclosed. HDR processing and standard dynamic range (SDR) processing adopt different electro-optical transfer function (EOTF) to convert digital code words to linear luminance. For compressing HDR video, EOTF is proposed to be involved in the selection of two deblocking parameters, β and t, which control the strength of deblocking filter. In local activity checking for filter decisions, the calculated local signal characteristics and the thresholds are adjusted according to EOTF. After deblocking filter, the clipping range is modified based on EOTF. The chroma deblocking filter is also extended to inter-inter block boundary.