Signaling for general constraint information in video coding

An apparatus for processing video 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 video comprising one or more pictures and a bitstream of the video according to a format rule,
• wherein the format rule specifies to include, in a general constraint constrain syntax structure, a first syntax element indicating whether each picture includes only one slice and whether a picture header syntax structure is present in a slice header, and
• wherein the format rule specifies that a presence of a third syntax element in a picture parameter set that specifies whether certain coding information is present in the picture header syntax structure or in the slice header is dependent on a value of a fourth syntax element in the picture g characteristics of pictures referring to the picture parameter set.

A non-transitory computer-readable storage medium storing instructions that cause a processor to:

• perform a conversion between a video comprising one or more pictures and a bitstream of the video according to a format rule,
• wherein the format rule specifies to include, in a general constraint constrain syntax structure, a first syntax element indicating whether each picture includes only one slice and whether a picture header syntax structure is present in a slice header, and
• wherein the format rule specifies that a presence of a third syntax element in a picture parameter set that specifies whether certain coding information is present in the picture header syntax structure or in the slice header is dependent on a value of a fourth syntax element in the picture g characteristics of pictures referring to the picture parameter set.

A non-transitory computer-readable recording medium storing a bitstream of a video which is generated by a method performed by a video processing apparatus, wherein the method comprises:

• generating the bitstream of the video comprising one or more pictures according to a format rule,
• wherein the format rule specifies to include, in a general constraint constrain syntax structure, a first syntax element indicating whether each picture includes only one slice and whether a picture header syntax structure is present in a slice header, and
• wherein the format rule specifies that a presence of a third syntax element in a picture parameter set that specifies whether certain coding information is present in the picture header syntax structure or in the slice header is dependent on a value of a fourth syntax element in the picture g characteristics of pictures referring to the picture parameter set.