Patent ID: 11936880
Assignee: TENCENT AMERICA LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A computer system comprising:
one or more computer-readable non-transitory storage media configured to store computer program code; and
one or more computer processors configured to access the computer program code stored in the one or more computer-readable non-transitory storage media and operate as instructed by the computer program code, the computer program code comprising:
receiving code configured to cause the one or more computer processors to receive video information corresponding to a plurality of subpictures within a picture;
identifying code configured to cause the one or more computer processors to identify first subpictures from among the plurality of subpictures, the first subpictures being picture-in-picture regions extracted from a base layer of the video information;
first encoding code configured to cause the one or more computer processors to enlarge and encode the first subpictures in a high quality mode, as subpictures, respectively, in a plurality of enhancement layers;
second encoding code configured to cause the one or more computer processors to encode remaining subpictures of the plurality of subpictures in a low quality mode in the base layer; and
outputting code configured to cause the one or more computer processors to output a video parameter set including a plurality of output layer sets, each output layer set comprising one or more encoded subpictures from the base layer and one or more encoded subpictures from the enhancement layers, each output layer set including, for each output layer, subpicture identifiers of the encoded subpictures in the output layer and profile-tier-level information for the output layer,

wherein subpictures in the enhancement layer are non-overlapping,
wherein the video parameter set includes a plurality of flags;
wherein a first flag of the plurality of flags indicates whether subpicture partitions are aligned across layers; and
wherein a second flag of the plurality of flags indicates whether subpicture identifiers are present in each layer.