US 11,706,428 B2
Method for signaling picture header in coded video stream
Byeongdoo Choi, Palo Alto, CA (US); Shan Liu, San Jose, CA (US); and Stephan Wenger, Hillsborough, CA (US)
Assigned to TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed by TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed on Nov. 12, 2020, as Appl. No. 17/96,168.
Claims priority of provisional application 63/005,640, filed on Apr. 6, 2020.
Prior Publication US 2021/0314582 A1, Oct. 7, 2021
Int. Cl. H04N 7/12 (2006.01); H04N 19/44 (2014.01); H04N 19/172 (2014.01); H04N 19/169 (2014.01); H04N 19/46 (2014.01)
CPC H04N 19/44 (2014.11) [H04N 19/172 (2014.11); H04N 19/188 (2014.11); H04N 19/46 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of decoding an encoded video bitstream using at least one processor, the method comprising:
obtaining a video coding layer (VCL) network abstraction layer (NAL) unit;
determining whether the VCL NAL unit is a first VCL NAL unit of a picture unit (PU) containing the VCL NAL unit;
based on determining that the VCL NAL unit is the first VCL NAL unit of the PU, determining whether the VCL NAL unit is a first VCL NAL unit of an access unit (AU) containing the PU; and
based on determining that the VCL NAL unit is the first VCL NAL unit of the AU, determining that one or more conditions of a plurality of conditions are true, the plurality of conditions comprising:
(1) a first value of nuh_layer_id of the VCL NAL unit is less than or equal to a second value of nuh_layer_id of a previous picture in decoding order,
(2) a first value of ph_pic_order_cnt_lsb of the VCL NAL unit differs from a second value of ph_pic_order_cnt_lsb of the previous picture in decoding order, and
(3) a first picture order count value derived for the VCL NAL unit differs from a second picture order count value of the previous picture in decoding order; and
based on the determining that the one or more conditions are true, decoding the AU based on the VCL NAL unit,
wherein based on a value of all_pic_coding_info_present_in_ph_flag indicating that all picture coding information is present in a picture header, a plurality of flags corresponding to the picture coding information are not signaled in a picture parameter set corresponding to the picture header, and
wherein the plurality of flags comprises at least one from among rpl_info_in_ph_flag, and wp_info_in_ph_flag.