id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
681	Incorrect scaling list dc coeff derivation in case scalingListId == PredListId	wzeng		"In function HLSyntaxReader::decodeScalingList, DC pred coeff is derived as follows.

    if (isPredictor)
    {
      predCoef = (PredListId >= SCALING_LIST_1D_START_16x16) ? scalingList->getScalingListDC(PredListId) : srcPred[0];
    }

Here, scalingList->getScalingListDC(PredListId) is initialized to be 0, not 16.

When scalingListId==PredListId, according to spec text VVC D7 vB, DC pred coeff should be set to 16.

	Otherwise, when scaling_list_pred_id_delta[ id ] is equal to 0, all elements of ScalingMatrixPred are set equal to 16, and ScalingMatrixDCPred is set equal to 16.

An easy fix is to change that piece of code to the following as srcPred has considered (scalingListId==PredListId) case.

    if (isPredictor)
    {
      predCoef = srcPred[0];
    }
"	defect	closed	minor		VTM	VTM-7.0rc1	fixed		ksuehring XiangLi fbossen jvet@…