US 11,991,379 B2
Interlaced video coding with leading pictures
Fnu Hendry, San Diego, CA (US); and Ye-Kui Wang, San Diego, CA (US)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Oct. 1, 2021, as Appl. No. 17/492,352.
Application 17/492,352 is a continuation of application No. PCT/US2020/026457, filed on Apr. 2, 2020.
Claims priority of provisional application 62/864,958, filed on Jun. 21, 2019.
Claims priority of provisional application 62/828,875, filed on Apr. 3, 2019.
Prior Publication US 2022/0021896 A1, Jan. 20, 2022
Int. Cl. H04N 7/12 (2006.01); H04N 19/159 (2014.01); H04N 19/172 (2014.01); H04N 19/46 (2014.01)
CPC H04N 19/46 (2014.11) [H04N 19/159 (2014.11); H04N 19/172 (2014.11)] 14 Claims
OG exemplary drawing
 
1. A method implemented by a decoder, the method comprising:
receiving a bitstream comprising a sequential field flag and a plurality of coded pictures including an intra random access point (IRAP) picture and one or more non-leading pictures associated with the IRAP picture;
determining that any leading pictures associated with the IRAP picture precede, in decoding order, all non-leading pictures associated with the IRAP picture when the sequential field flag is set to zero;
determining that at most one non-leading picture precedes, in decoding order, an initial leading picture associated with the IRAP picture and no non-leading pictures are positioned between the initial leading picture and a final leading picture in decoding order when the sequential field flag is set to one, wherein the sequential field flag is set to one when a coded video sequence includes pictures that represent fields, and wherein the sequential field flag is set to zero when the coded video sequence includes pictures that represent frames; and
applying a decoding process to the IRAP picture, any leading pictures associated with the IRAP picture, and the one or more non-leading pictures associated with the IRAP picture in decoding order based on whether the sequential field flag is set to one or zero.