id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
100	A SW bug in VTM for MPM generation when multiline is used for intra CU prediction	ezhizng		"It looks as if there is a potential bug in intra prediction from multi reference line, please double check.
 
The code below is used for multi reference line intra prediction MPM generation. To avoid insert duplicated modes in MPM, the red marked code:
{{{
if (aboveIntraDir > DC_IDX)
}}} 
should be changed to:
{{{
if (aboveIntraDir > DC_IDX && aboveIntraDir != leftIntraDir)
}}} 
 
Code snip below:
UtilTools.cpp
Line 333

{{{
int PU::getIntraMPMs()
{
#if JVET_L0283_MULTI_REF_LINE
    if (extendRefLine)
    {
      int modeIdx = 0;
      int angularMode[2] = { 0, 0 };
 
      if (leftIntraDir > DC_IDX)
      {
        angularMode[modeIdx++] = leftIntraDir;
      }
      if (aboveIntraDir > DC_IDX)
      {
        angularMode[modeIdx++] = aboveIntraDir;
      }
}
}}}"	defect	closed	major		VTM	VTM-2.2	fixed		zhi.a.zhang@… frank.bossen@… ksuehring XiangLi fbossen jvet@…