Patent ID: 11863768
Assignee: LEMON INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 11:
12. An apparatus for processing visual media file data comprising a processor and a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to:
perform a conversion between a visual media file and a bitstream, wherein the visual media file comprises image items each comprising a sequence of pictures according to a media file format, and wherein the bitstream comprises access units each comprising one or more pictures each belonging to a layer according to a video coding format,
wherein the media file format specifies that an operating point information (OPI) network abstraction layer (NAL) unit is absent in an image item having a specific image item type or samples of the image item, and
wherein the media file format further specifies that, in response to a record of operating points being included in a property descriptor of the operating points that indicates high-level characteristics of the bitstream, at least one of a value of a first syntax element in the record or a value of a second syntax element in the record is constrained to be a predetermined value.