	US 12,439,064 B2
	Roll sample group in VVC video coding
Ye-Kui Wang, San Diego, CA (US); Li Zhang, San Diego, CA (US); Haibin Yin, Beijing (CN); and Lingyu Li, 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 Apr. 26, 2023, as Appl. No. 18/307,161.
Application 18/307,161 is a continuation of application No. PCT/CN2021/126299, filed on Oct. 26, 2021.
Claims priority of application No. PCT/CN2020/123540 (WO), filed on Oct. 26, 2020.
Prior Publication US 2023/0269384 A1, Aug. 24, 2023
Int. Cl. H04N 19/30 (2014.01); H04N 19/107 (2014.01); H04N 19/169 (2014.01); H04N 19/172 (2014.01); H04N 19/70 (2014.01)

CPC H04N 19/30 (2014.11) [H04N 19/107 (2014.11); H04N 19/172 (2014.11); H04N 19/188 (2014.11); H04N 19/70 (2014.11)]

17 Claims

1. A method for processing visual media data comprising:

performing a conversion between visual media data and a visual media data file that includes pictures in layers, based on a random access recovery point (roll) sample group specifying access points into the layers, and a grouping type parameter, the grouping type parameter specifying a correspondence between the access points and relevant layers of the layers and including a layer identifier method identification code parameter specifying that the access points include one or more of:

one or more gradual decoding refresh (GDR) pictures; and

one or more mixed network abstraction layer (NAL) unit pictures with both an intra random access point (IRAP) subpicture and a non-IRAP subpicture,

wherein the layer identifier method identification code parameter is denoted as layer_id_method_idc, and wherein the layer_id_method_idc equal to one or three specifies that: the access points apply to only the relevant layers and each bit in a target layer parameter included in the grouping type parameter specifies one of the relevant layers.