US 12,231,659 B2
Number restriction for sublayers
Ye-kui Wang, San Diego, CA (US); and Zhipin Deng, Beijing (CN)
Assigned to BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., Beijing (CN); and BYTEDANCE INC., Los Angeles, CA (US)
Filed by Beijing Bytedance Network Technology Co., Ltd., Beijing (CN); and Bytedance Inc., Los Angeles, CA (US)
Filed on Nov. 18, 2022, as Appl. No. 17/990,247.
Application 17/990,247 is a continuation of application No. PCT/CN2021/095124, filed on May 21, 2021.
Claims priority of application No. PCT/CN2020/091758 (WO), filed on May 22, 2020.
Prior Publication US 2023/0078115 A1, Mar. 16, 2023
Int. Cl. H04N 19/196 (2014.01); H04N 19/117 (2014.01); H04N 19/167 (2014.01); H04N 19/172 (2014.01); H04N 19/70 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/196 (2014.11) [H04N 19/117 (2014.11); H04N 19/167 (2014.11); H04N 19/172 (2014.11); H04N 19/70 (2014.11); H04N 19/82 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of video processing, comprising:
performing a conversion between a video and a bitstream of the video according to a first rule,
determining whether a value of a first field of a sequence parameter set is set equal to 0 or is greater than 0;
wherein the first rule specifies that responsive to the value of the first field of the sequence parameter set that is indicative of an identifier of a video parameter set being equal to 0, a second field of the video parameter set that is indicative of a first maximum number of sublayers allowed in a layer specified by the video parameter set is construed to be equal to a third field in the sequence parameter set, and the value of the third field is in a range of 0 to 6, inclusive,
wherein the third field is indicative of a second maximum number of sublayers allowed in each coded layer video sequence referring to the sequence parameter set,
wherein the first rule further specifies that responsive to the value of the first field being greater than 0, the first field specifies the identifier of the video parameter set referred to by the sequence parameter set, and the value of the third field is in a range of 0 to a value of the second field, inclusive, and
wherein the conversion is performed according to a second rule, and wherein the second rule specifies that, responsive to the value of the first field being equal to 0, a total number of output layer sets specified by the video parameter set and a number of layers in a first output layer set is equal to 1, and a layer identifier of the video parameter set is equal to a network abstraction layer (NAL) unit header identifier (nuh_layer_id) of a layer in a coded video sequence.