US 11,758,171 B2
Methods and systems for performing gradual decoding refresh processing on pictures
Jie Chen, Beijing (CN); Ru-Ling Liao, Beijing (CN); Yan Ye, San Diego, CA (US); and Jiancong Luo, Skillman, NJ (US)
Assigned to Alibaba Group Holding Limited, Grand Cayman (KY)
Filed by ALIBABA GROUP HOLDING LIMITED, Grand Cayman (KY)
Filed on Dec. 1, 2020, as Appl. No. 17/108,534.
Claims priority of provisional application 62/954,011, filed on Dec. 27, 2019.
Prior Publication US 2021/0203971 A1, Jul. 1, 2021
Int. Cl. H04N 19/46 (2014.01); H04N 19/107 (2014.01); H04N 19/117 (2014.01); H04N 19/119 (2014.01); H04N 19/172 (2014.01); H04N 19/70 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/46 (2014.11) [H04N 19/107 (2014.11); H04N 19/117 (2014.11); H04N 19/119 (2014.11); H04N 19/172 (2014.11); H04N 19/70 (2014.11); H04N 19/82 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method for encoding a video sequence, comprising:
in response to receiving a video sequence, encoding first flag data in a parameter set associated with the video sequence, wherein the first flag data represents whether gradual decoding refresh (GDR) is enabled or disabled for the video sequence; and
in response to receiving the video sequence, encoding second flag data in a picture header associated with the video sequence, the second flag data representing whether a picture is a GDR picture or is not a GDR picture, wherein:
when the second flag data is equal to 1, the picture is specified to be a GDR picture; and
when the second flag data is equal to 0, the picture is specified to not be a GDR picture;
wherein if the second flag data is not present in the picture header, the second flag data is inferred to be equal to 0;
wherein when the first flag data is 0, the second flag data is also set or inferred to be 0.