JVET-Q0775 AHG9: Picture Header in Slice Header [J. Samuelsson, S. Deshpande (Sharp), R. Sjöberg, M. Pettersson, M. Damghanian, D. Saffar (Ericsson), L. Li, B. Choi, X. Xu, X. Li, S. Wenger, S. Liu (Tencent)] [late]
This contribution was discussed Sunday 12 January at 1445 in Track A (chaired by GJS).
This contribution contains a proposal for signalling the picture header in the slice header. The contribution is based on JVET-Q0255, JVET-Q0419, JVET-Q0426. The introduction and overhead analysis provided in the contribution has been copied from JVET-Q0255.
This uses a flag in the SH; it can only be equal to 1 when there is a single slice per picture. A constraint specifies that the entire CLVS will have this flag equal to the same value.
When the flag is equal to 1, no PHs are allowed in the CLVS.
Decision (cleanup): Adopt. Additionally, it was agreed to condition the no_output_of_prior_pics_flag on the indication that the picture is a GDR or IRAP picture and to put ph_pic_parameter_set_id before ph_pic_order_cnt_lsb, which would be followed by recovery_poc_cnt. If there is something that can be sent either in the PH NAL unit or in the SH, it shall be in the PH structure when the PH is in the SH.
It was agreed that we will keep the PH syntax structure the same in the PH NAL unit and the SH.