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Ticket Resolution Summary Owner Reporter
#33 fixed typo in DV derivation process tech lizhang
Description

In subcluase H.8.5.4,the following equation: MvDisp[ x ][ y ] = ivpMvFlagLX (H-236)

shall be replaced by: MvDisp[ x ][ y ] = mvDisp (H-236)

#41 fixed problem in cross-references tech lizhang
Description

The sub-clause H.8.5.2.2.5 (i.e., Illumination compensated sample prediction process) is never invoked.

#112 fixed output_layer_flag conformance restriction in MV-HEVC encoding tech Tomohiro Ikai
Description

In Multiview Main profile, there is the following conformance restiction. "– When NumLayersInIdList[ OlsIdxToLsIdx[ olsIdx ] ] is equal to 2, output_layer_flag[ olsIdx ][ j ] derived according to any active VPS shall be equal to 1 for j in the range of 0 to 1, inclusive, for subBitstream."

In HTM encoding with the current cfg files, the restriction fails:

Solving this issue, we should remove the following two lines in cfg/MV-HEVC/baseCfg_2view.cfg OutputLayerSetIdx : 1 # Indices of layer sets used to derive additional output layer sets LayerIdsInAddOutputLayerSet_0 : 1 # Indices in VPS of output layers in additional output layer set 0

And we should replace the following lines in cfg/MV-HEVC/baseCfg_3view.cfg OutputLayerSetIdx : 1 2 # Indices of layer sets used to derive additional output layer sets LayerIdsInAddOutputLayerSet_0 : 1 # Indices in VPS of output layers in additional output layer set 0 LayerIdsInAddOutputLayerSet_1 : 2 # Indices in VPS of output layers in additional output layer set 1 with OutputLayerSetIdx : 2 # Indices of layer sets used to derive additional output layer sets LayerIdsInAddOutputLayerSet_1 : 2 # Indices in VPS of output layers in additional output layer set 1

Note: For 2 view case, I've conducted simulation with cfg change and confirmed the result but for 3 view case, I haven't conducted the simulation.

In addition, we may have the checks in decoder/encoder.

Decoder sides's check code may be as follows:

Void TDecCavlc::parseVPSExtension( TComVPS* pcVPS ) {

... for( Int i = 1; i < pcVPS->getNumOutputLayerSets( ); i++ ) {

if( pcVPS->getNumLayerSets() > 2 && i >= pcVPS->getNumLayerSets( ) ) {

READ_CODE( pcVPS->getLayerSetIdxForOlsMinus1Len( i ), uiCode, "layer_set_idx_for_ols_minus1[i]" ); pcVPS->setLayerSetIdxForOlsMinus1( i, uiCode );

} ... if( pcVPS->getNumOutputLayersInOutputLayerSet( i ) == 1 && pcVPS->getNumDirectRefLayers( pcVPS->getOlsHighestOutputLayerId( i ) ) > 0 ) {

READ_FLAG( uiCode, "alt_output_layer_flag[ i ]" ); pcVPS->setAltOutputLayerFlag( i, uiCode == 1 );

}

#if NH_MV_FIX_TICKET_XXX

if (pcVPS->getNumLayersInIdList( pcVPS->olsIdxToLsIdx( i ) ) == 2 && pcVPS->getPTL(pcVPS->getProfileTierLevelIdx(i, 1))->getGeneralPTL()->getProfileIdc() == Profile::MULTIVIEWMAIN) {

for( Int j = 0; j < pcVPS->getNumLayersInIdList( pcVPS->olsIdxToLsIdx( i ) ); j++ ) {

if (pcVPS->getOutputLayerFlag(i, j) == 0) {

printf("!!Warning!!, output_layer_flag[] shall be always 1 when two layer is used in OLS in MV-HEVC Main profile\n");

}

assert(pcVPS->getOutputLayerFlag(i, j));

}

}

#endif

}

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