References terms and definitions

[podborski]

Some referenced terms seem not to be defined in the referenced specifications in the same way. For example, look at this sentence:

A TU contains a series of OBUs starting from a Temporal Delimiter, optional sequence headers, optional metadata OBUs, a sequence of one or more frame headers, each followed by zero or more tile group OBUs as well as optional padding OBUs.

• TU is not defined in the AV1 specification. Section 2 of AV1 specifications defines Temporal unit and I could not find the term TU in the spec.
• Temporal Delimiter should be Temporal delimiter OBU
• sequence headers -> sequence header OBUs
• frame headers -> frame header OBUs

which would lead to something like this:

A temporal unit contains a series of OBUs starting from a Temporal delimiter OBU, optional sequence header OBUs, optional metadata OBUs, a sequence of one or more frame header OBUs, each followed by zero or more tile group OBUs as well as optional padding OBUs.

Other parts of the specification should also use properly defined terms as defined in referenced specifications.

[podborski]

VideoFullRangeFlag should be set to 0

should be changed to:

color_range should be set to 0

AV1 does not define VideoFullRangeFlag, but defines color_range.