id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
979	Editorial fix for the first VCL NAL derivation	Vadim		"In the current spec, the first VCL NAL is defined as follows.

A VCL NAL unit is the first VCL NAL unit of an AU (and consequently the PU containing the VCL NAL unit is the first PU of the AU) when '''the VCL NAL unit is the first VCL NAL unit that follows a PH NAL unit and''' one or more of the following conditions are true: ...

However, there is case when PH NAL is not present (signaled inside VCL NAL), so this language is inaccurate.

Suggestion is to remove mentioning PH NAL or add when PH NAL is present, otherwise first VCL NAL is undefined when PH NAL is not present since there is no VCL NAL that follows PH NAL.

A VCL NAL unit is the first VCL NAL unit of an AU (and consequently the PU containing the VCL NAL unit is the first PU of the AU) when one or more of the following conditions are true: ..."	defect	closed	minor		spec		fixed		ksuehring bbross XiangLi fbossen jvet@…