Variable name compIdx is used for different purposes in the spec

[guichunli]

Variable name "compIdx" is used for different purposes in the spec as below:

1. MV component index as in semantic for mvd_sign_flag[compIdx]

mvd_sign_flag[ compIdx ] specifies the sign of a motion vector component difference as follows:
–	If mvd_sign_flag[ compIdx ] is equal to 0, the corresponding motion vector component difference has a positive value.
–	Otherwise (mvd_sign_flag[ compIdx ] is equal to 1), the corresponding motion vector component difference has a negative value.

2. Colour component index as in 8.4.5.3 Decoding process for palette mode

for( i = 0; i < CurrentPaletteSize[ startComp ]; i++ )
	for( compIdx = startComp; compIdx < (startComp + numComps); compIdx++ )

It would be more clear if the "compIdx" in 8.4.5.3 is change to "cIdx", which is aligned with colour component index used at other places.

[bbross]

For palette I suggest the following:

In PredictorPaletteSize[ compIdx ], with compIdx = 0, 1, compIdx specifies luma or chroma not Y,Cb or Cr as for cIdx:
compIdx -> isChroma

In PredictorPaletteEntries[ compIdx ][ i ], compIdx can range from 0 to 3 as for cIdx:
compIdx -> cIdx

[bbross]

Thanks for reporting!

This has been fixed in JVET-Q2001-v5.