US 12,238,336 B2
Gradual decoding refresh in video coding
Fnu Hendry, San Diego, CA (US); Ye-Kui Wang, San Diego, CA (US); and Jianle Chen, San Diego, CA (US)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Sep. 9, 2021, as Appl. No. 17/470,783.
Application 17/470,783 is a continuation of application No. PCT/US2020/022180, filed on Mar. 11, 2020.
Claims priority of provisional application 62/871,020, filed on Jul. 5, 2019.
Claims priority of provisional application 62/816,722, filed on Mar. 11, 2019.
Prior Publication US 2021/0409689 A1, Dec. 30, 2021
Int. Cl. H04N 19/70 (2014.01); H04N 19/107 (2014.01); H04N 19/14 (2014.01); H04N 19/162 (2014.01); H04N 19/169 (2014.01); H04N 19/172 (2014.01); H04N 19/174 (2014.01); H04N 19/30 (2014.01); H04N 19/46 (2014.01)
CPC H04N 19/70 (2014.11) [H04N 19/107 (2014.11); H04N 19/14 (2014.11); H04N 19/162 (2014.11); H04N 19/172 (2014.11); H04N 19/174 (2014.11); H04N 19/188 (2014.11); H04N 19/1883 (2014.11); H04N 19/30 (2014.11); H04N 19/46 (2014.11)] 15 Claims
OG exemplary drawing
 
1. A method implemented by a decoder, the method comprising:
receiving a bitstream comprising a coded video sequence (CVS) and a gradual decoding refresh (GDR) flag corresponding to the CVS, wherein a value of the GDR flag is one (1) when a GDR picture is enabled in the CVS, wherein the GDR picture is associated with a GDR network abstract layer (NAL) unit type (GDR-NUT) and has a temporal identifier (TemporalID) equal to zero, wherein the bitstream further comprises a header including a syntax element indicating a picture order count of recovery point picture for the GDR picture, and wherein when the GDR picture is a first picture in the bitstream in decoding order or the first picture that follows an end of sequence (EOS) NAL unit in decoding order, a flag is set to one to prevent output of incorrect pictures;
determining whether the GDR picture is enabled for the CVS based on the value of the GDR flag; and
decoding the CVS based on the GDR flag.