US 12,395,681 B2
Intra random access points for picture coding
Ye-kui Wang, San Diego, CA (US)
Assigned to Bytedance Inc., Los Angeles, CA (US)
Filed by Bytedance Inc., Los Angeles, CA (US)
Filed on Nov. 21, 2023, as Appl. No. 18/516,654.
Application 18/516,654 is a continuation of application No. 17/946,335, filed on Sep. 16, 2022, granted, now 11,979,561.
Application 17/946,335 is a continuation of application No. PCT/US2021/022572, filed on Mar. 16, 2021.
Claims priority of provisional application 62/992,046, filed on Mar. 19, 2020.
Prior Publication US 2024/0098252 A1, Mar. 21, 2024
Int. Cl. H04N 19/70 (2014.01); H04N 19/105 (2014.01); H04N 19/109 (2014.01); H04N 19/159 (2014.01); H04N 19/169 (2014.01); H04N 19/172 (2014.01); H04N 19/174 (2014.01); H04N 19/31 (2014.01); H04N 19/46 (2014.01); H04N 19/503 (2014.01)
CPC H04N 19/70 (2014.11) [H04N 19/105 (2014.11); H04N 19/109 (2014.11); H04N 19/159 (2014.11); H04N 19/172 (2014.11); H04N 19/174 (2014.11); H04N 19/188 (2014.11); H04N 19/31 (2014.11); H04N 19/46 (2014.11); H04N 19/503 (2014.11)] 18 Claims
OG exemplary drawing
 
1. A method of video processing, comprising:
performing a conversion between a video having one or more video layers comprising one or more video pictures and a bitstream of the video according to a first rule,
wherein the first rule specifies to apply a first constraint on a decoding order of a first picture associated with a first intra random access point picture and a non-leading picture if and only if the first picture, the first intra random access point picture, and the non-leading picture are in a same layer,
wherein the conversion is performed according to a second rule,
wherein the second rule specifies a first condition under which no picture that has been generated by a decoding process for generating an unavailable reference picture is referred to by an entry in a reference picture list of a current slice of a second picture, and
wherein the first condition comprises that the second picture with a network abstraction layer (NAL) unit header layer identifier equal to a particular value is not any of:
a first clean random access picture with a first variable indicating no output before recovery equal to 1;
a picture, associated with a second clean random access picture with a second variable indicating no output before recovery equal to 1, that precedes, in the decoding order, all leading pictures associated with the second clean random access picture with the second variable indicating no output before recovery equal to 1;
a leading picture associated with a third clean random access picture with a third variable indicating no output before recovery equal to 1;
a first gradual decoding refresh picture with a fourth variable indicating no output before recovery equal to 1; and
a recovering picture of a second gradual decoding refresh picture with a fifth variable indicating no output before recovery equal to 1 and the NAL unit header layer identifier equal to the particular value.