US 12,439,087 B2
Methods and apparatus on transform and coefficient signaling
Xiaoyu Xiu, Beijing (CN); Tsung-Chuan Ma, Beijing (CN); Yi-Wen Chen, Beijing (CN); Xianglin Wang, Beijing (CN); Hong-Jheng Jhu, Beijing (CN); and Bing Yu, Beijing (CN)
Assigned to BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD., Beijing (CN)
Filed by BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD., Beijing (CN)
Filed on Apr. 30, 2024, as Appl. No. 18/651,295.
Application 18/651,295 is a continuation of application No. 17/750,169, filed on May 20, 2022, granted, now 12,015,798.
Application 17/750,169 is a continuation of application No. PCT/US2020/061843, filed on Nov. 23, 2020.
Claims priority of provisional application 62/959,325, filed on Jan. 10, 2020.
Claims priority of provisional application 62/938,890, filed on Nov. 21, 2019.
Prior Publication US 2024/0283977 A1, Aug. 22, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/00 (2014.01); H04N 19/129 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01); H04N 19/625 (2014.01)
CPC H04N 19/625 (2014.11) [H04N 19/129 (2014.11); H04N 19/176 (2014.11); H04N 19/46 (2014.11)] 18 Claims
OG exemplary drawing
 
1. A method for video coding, comprising:
determining whether any coding group of a transform block located within a second region has a non-zero coefficient, wherein the transform block comprises a first region and the second region; and
in accordance with a determination that no coding group of the transform block located within the second region has a non-zero coefficient:
applying respective inverse transforms to transform coefficients of the transform block in horizontal and vertical directions.