Picture header presence

A decoder, the decoder comprising:

• processing circuitry;
• and
• memory containing instructions executable by the processing circuitry, wherein the decoder is operative to perform a method comprising:
• obtaining a slice header for a slice of the picture, wherein the slice header comprises a state syntax element;
• decoding a state value from the state syntax element in the slice header, wherein a) if the state value is not equal to a first value, then the state value indicates that the bitstream should include for the picture a picture header comprising a set of picture syntax elements and b) if the state value is equal to the first value, then the state value indicates that i) the slice header should contain said set of picture syntax elements and ii) the bitstream should not include a picture header for the picture;
• and
• using the set of picture syntax elements to decode the slice of the picture, wherein
• the bitstream comprises a coded layer video sequence (CLVS),
• the picture is a picture within the CLVS,
• the CLVS comprises a plurality of slice headers including the slice header,
• each slice header included in the CLVS comprises the state syntax element, and
• each state syntax element encodes the state value.