US 12,323,609 B2
HRD parameters for layer based conformance testing
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 Mar. 24, 2022, as Appl. No. 17/703,393.
Application 17/703,393 is a continuation of application No. PCT/US2020/049729, filed on Sep. 8, 2020.
Claims priority of provisional application 62/905,244, filed on Sep. 24, 2019.
Prior Publication US 2022/0217394 A1, Jul. 7, 2022
Int. Cl. H04N 19/46 (2014.01); H04N 19/149 (2014.01); H04N 19/154 (2014.01); H04N 19/169 (2014.01); H04N 19/172 (2014.01); H04N 19/187 (2014.01); H04N 19/30 (2014.01); H04N 19/423 (2014.01); H04N 19/44 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/44 (2014.11) [H04N 19/149 (2014.11); H04N 19/154 (2014.11); H04N 19/172 (2014.11); H04N 19/187 (2014.11); H04N 19/188 (2014.11); H04N 19/30 (2014.11); H04N 19/423 (2014.11); H04N 19/46 (2014.11); H04N 19/70 (2014.11)] 17 Claims
OG exemplary drawing
 
1. A method implemented by a decoder, the method comprising:
receiving a bitstream comprising a plurality of sublayer representations, hypothetical reference decoder (HRD) parameters, and a sublayer coding picture buffer (CPB) parameters present flag (sublayer_cpb_params_present_flag);
inferring that the HRD parameters for all sublayer representations with temporal identifiers (TemporalIds) less than a maximum TemporalId are equal to the HRD parameters for a maximum sublayer representation with the maximum TemporalId when the sublayer_cpb_params present_flag is set to zero, wherein each sublayer representation is a subset of the bitstream containing network abstraction layer (NAL) units of a particular sublayer and lower sublayers, wherein all sublayers are associated with a same number of CPB delivery schedules, and wherein the maximum TemporalId of the maximum sublayer representation is included in the bitstream as a HRD maximum TemporalId (hrd_max_tid[i]) syntax element where i indicates an ith HRD parameter syntax structure; and
decoding a picture from the sublayer representations.