id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
811	missing affine MVD prediction in spec.	hanhuang		"The affine MVD prediction (per adoption of CE4-1.3.b in JVET-K0337), i.e. predict the MVD of CPMV1 and CPMV2 from MVD of CPMV0, is missing in current spec. 

The relative meeting note is quoted in the bellow:
""JVET-K0337: Affine MC coding and models (4.1.3a, affine MVP list construction, and 4.1.3b, MV difference coding, and 4.1.3c, 4/6 parameter model, no slice level switch)."" 

suggested fix in 8.5.5.1 of current spec.:

3.The variable mvdCpLX[ cpIdx ] with cpIdx equals to 0 is derived as follows:
  mvdCpLX[ cpIdx ][ 0 ] = MvdCpLX[ xCb ][ yCb ][ cpIdx ][ 0 ]	(671)
  mvdCpLX[ cpIdx ][ 1 ] = MvdCpLX[ xCb ][ yCb ][ cpIdx ][ 1 ]	(672)	
The variable mvdCpLX[ cpIdx ] with cpIdx ranging from '''1''' to numCpMv − 1, is derived as follows:
  mvdCpLX[ cpIdx ][ 0 ] = MvdCpLX[ xCb ][ yCb ][ cpIdx ][ 0 ] + MvdCpLX[ xCb ][ yCb ][ '''0''' ][ 0 ]	 
  mvdCpLX[ cpIdx ][ 1 ] = MvdCpLX[ xCb ][ yCb ][ cpIdx ][ 1 ] + MvdCpLX[ xCb ][ yCb ][ '''0''' ][ 1 ]	
"	defect	closed	minor		spec	VVC D7 vE	fixed		vzakharc yuwenhe jvet@…