US 12,022,059 B2
Video coding using multi-resolution reference picture management
Xianglin Wang, San Diego, CA (US); Yi-Wen Chen, San Diego, CA (US); Yunfei Zheng, San Jose, CA (US); Xing Wen, San Jose, CA (US); Yucong Chen, Beijing (CN); and Yue Huang, 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 Dec. 6, 2019, as Appl. No. 16/706,675.
Claims priority of provisional application 62/776,997, filed on Dec. 7, 2018.
Prior Publication US 2020/0186795 A1, Jun. 11, 2020
Int. Cl. H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/172 (2014.01); H04N 19/186 (2014.01); H04N 19/33 (2014.01); H04N 19/423 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/172 (2014.11); H04N 19/186 (2014.11); H04N 19/33 (2014.11); H04N 19/423 (2014.11)] 12 Claims
OG exemplary drawing
 
1. A video decoding method comprising:
decoding a set of two or more pictures to obtain respective decoded pictures of the set of two or more pictures, the set comprising at least a first picture coded with a first spatial resolution, and a second picture coded with a second spatial resolution different from the first spatial resolution;
storing the respective decoded pictures of the set of two or more pictures in a decoded picture buffer based on corresponding spatial resolutions; and
obtaining a list of reference pictures comprising the respective decoded pictures of the set of two or more pictures stored in the decoded picture buffer, wherein the list of reference pictures is used for inter prediction of a third picture temporally subsequent to the set of two or more pictures without changing the corresponding spatial resolutions of the respective decoded pictures where a spatial resolution of the third picture is different from a spatial resolution of a respective decoded picture to be used for the inter prediction of the third picture; and
respectively signaling a picture width and a picture height for each picture of the set of two or more pictures using a picture parameter set (PPS),
wherein the third picture subsequent to the set of two or more pictures comprises a current picture coded with a third spatial resolution based on a reference picture of the list of reference pictures, and wherein a ratio is determined based on the third spatial resolution and a spatial resolution of the reference picture for decoding the current picture.