US 12,069,284 B2
Signaling of non-picture-level syntax elements at the picture level
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 Mar. 22, 2022, as Appl. No. 17/701,011.
Application 17/701,011 is a continuation of application No. PCT/US2020/052281, filed on Sep. 23, 2020.
Claims priority of provisional application 62/905,228, filed on Sep. 24, 2019.
Prior Publication US 2022/0217380 A1, Jul. 7, 2022
Int. Cl. H04N 19/44 (2014.01); H04N 19/172 (2014.01); H04N 19/46 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/44 (2014.11) [H04N 19/172 (2014.11); H04N 19/46 (2014.11); H04N 19/70 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method implemented by a video decoder and comprising:
receiving a video bitstream comprising a reference picture list (RPL) flag, wherein the RPL flag equal to a first value specifies that RPL signaling is present in a picture header (PH) and is not present in slice headers, wherein the RPL flag equal to a second value specifies that the RPL signaling is not present in the PH and may be present in the slice headers, wherein the RPL signaling is RPL information comprised in the video bitstream, wherein the RPL information comprises an RPL index or ref_pic_list_struct(listIdx, rplsIdx) syntax structure, wherein the RPL index specifics an index, into a list of the ref_pic_list_struct(listIdx, rplsIdx) syntax structures with listIdx equal to i included in a sequence parameter set (SPS), of the ref pic list struct(listIdx, rplsIdx) syntax structure with listIdx equal to i that is used for derivation of RPL i of a current picture, wherein the video bitstream further comprises an adaptive loop filter (ALF) flag, wherein the ALF flag equal to the first value specifies that ALF signaling is present in the PH and not present in the slice headers, wherein the ALF flag equal to the second value specifies that the ALF signaling is not present in the PH and may be present in the slice headers, and wherein the ALF signaling comprises an ALF enable flag; and
decoding, based on the RPL flag and the ALF flag, a coded picture to obtain a decoded picture.