SIGNALING OF SYNTAX ELEMENTS FOR REFERENCE PICTURE INDICATION

摘要

A video processing method is provided to include performing a conversion between a video comprising one or more pictures, each comprising at least one slice, and a bitstream of the video, wherein the bitstream conforms to a format rule, wherein the format rule specifies to include a first field indicative of presence of a second field identifying a maximum index for a reference picture used for coding a slice based on a condition; wherein the condition is representable as a logical expression "A& (B || C) ", in which: A indicates that a first flag indicating whether reference picture list information is included in a picture header syntax structure is equal to 1, or a network abstraction layer (NAL) unit type is not equal to an instantaneous decoding refresh (IDR) type, or a second flag indicating whether reference picture list information could be present in slice headers of slices with IDR NAL unit types is equal to 1, B indicates that a slice type is equal to P or B, and a number of reference entries in reference picture list 0 is greater than 1, C indicates the slice type is equal to B and a number of reference entries in reference picture list 1 is greater than 1, and wherein "&" is logical "and" operation and "||" is logical "or" operation.