Changeset 147 in SHVCSoftware for branches/SHM-2.0-dev

Timestamp:

3 May 2013, 01:14:49 (12 years ago)

Author:

qualcomm

Message:

M0259: lambda refinement for RA configurations

Location:

branches/SHM-2.0-dev/source/Lib

Files:

• TLibCommon/TypeDef.h (modified) (1 diff)
• TLibEncoder/TEncSlice.cpp (modified) (3 diffs)
• TLibEncoder/TEncSlice.h (modified) (1 diff)

branches/SHM-2.0-dev/source/Lib/TLibCommon/TypeDef.h

@@ -64 +64 @@
 #define SIMPLIFIED_MV_POS_SCALING        1      ///< M0133/M0449: inter-layer MV scaling and pixel mapping position calculation
 #define ILP_DECODED_PICTURE              1      ///< M0274: use decoded picture size for inter-layer prediction
+#define JCTVC_M0259_LAMBDAREFINEMENT     1      ///< JCTVC-M0259: lambda refinement (encoder only optimization)
+
 
 #define AVC_BASE                         0      ///< YUV BL reading for AVC base SVC

branches/SHM-2.0-dev/source/Lib/TLibEncoder/TEncSlice.cpp

@@ -337 +337 @@
   }
 
+#if JCTVC_M0259_LAMBDAREFINEMENT
+  if( rpcSlice->getLayerId() > 0 && depth >= 3 && m_pcCfg->getGOPSize() == ( 1 << depth ) )
+  {
+    Int nCurLayer = rpcSlice->getLayerId();
+    Double gamma = xCalEnhLambdaFactor( m_ppcTEncTop[nCurLayer-1]->getQP() - m_ppcTEncTop[nCurLayer]->getQP() ,
+      1.0 * m_ppcTEncTop[nCurLayer]->getSourceWidth() * m_ppcTEncTop[nCurLayer]->getSourceHeight() 
+      / m_ppcTEncTop[nCurLayer-1]->getSourceWidth() / m_ppcTEncTop[nCurLayer-1]->getSourceHeight() );
+    dLambda *= gamma;
+  }
+#endif
+
   // store lambda
   m_pcRdCost ->setLambda( dLambda );
@@ -354 +365 @@
   qpc = Clip3( 0, 57, iQP + chromaQPOffset);
   weight = pow( 2.0, (iQP-g_aucChromaScale[qpc])/3.0 );  // takes into account of the chroma qp mapping and chroma qp Offset
+#if JCTVC_M0259_LAMBDAREFINEMENT
+  if( rpcSlice->getLayerId() > 0 && m_pcCfg->getGOPSize() >= 8 && rpcSlice->isIntra() == false && depth == 0 )
+  {
+    dLambda *= 1.1;
+    weight *= 1.15;
+  }
+#endif
   m_pcRdCost->setCrDistortionWeight(weight);
 #endif
@@ -1852 +1870 @@
 }
 
+#if JCTVC_M0259_LAMBDAREFINEMENT
+Double TEncSlice::xCalEnhLambdaFactor( Double deltaQP , Double beta )
+{
+  double tmp = beta * pow( 2.0 , deltaQP / 6 );
+  double gamma = tmp / ( tmp + 1 );
+  return( gamma );
+}
+#endif
 //! \}

branches/SHM-2.0-dev/source/Lib/TLibEncoder/TEncSlice.h

@@ -141 +141 @@
 private:
   Double  xGetQPValueAccordingToLambda ( Double lambda );
+
+#if JCTVC_M0259_LAMBDAREFINEMENT
+private:
+  Double  xCalEnhLambdaFactor( Double deltaQP , Double beta );
+#endif
 };