id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
1114	Question about log2_max_mv_length_horizontal	peterderivaz		"In ""8.5.3.2 Derivation process for motion vector components and reference indices"" there is a note that the resulting values of `mvLX[0]` and `mvLX[1]` will always be in the range `-2^15` to `2^15-1`.

However, in ""E.2.1 VUI parameters semantics"" the semantics for log2_max_mv_length_horizontal say that a value of 16 can be sent, meaning that no value of a horizontal motion vector component is outside the range `-2^16` to `2^16-1`, although the default value is 15 if no bitstream restriction parameters are present.

This 16 seems odd because:
1. it appears impossible to code a motion vector that would require the value of 16
2. the vertical range is limited to 15
3. it is using a ""bitstream restriction"" to extend the range of motion vectors (all other fields in this structure restrict the allowed range)

Question: Should this 16 be a 15, or have I misunderstood something?"	enhancement	closed	minor	v5	Text	v4 (12/2016)	duplicate		bbross wjhan jct-vc@…