Using more fine-grained complexity settings for SILK
authorJean-Marc Valin <jmvalin@jmvalin.ca>
Mon, 18 Apr 2016 17:39:41 +0000 (13:39 -0400)
committerJean-Marc Valin <jmvalin@jmvalin.ca>
Sun, 17 Jul 2016 19:05:54 +0000 (15:05 -0400)
Only complexity 0-1 now uses the plain non-delayed-decision NSQ since its
quality is pretty bad. Previously 0-3 were using that plain NSQ.

silk/control_codec.c

index 071e066..7ebea25 100644 (file)
@@ -319,7 +319,7 @@ static opus_int silk_setup_complexity(
 
     /* Set encoding complexity */
     silk_assert( Complexity >= 0 && Complexity <= 10 );
-    if( Complexity < 2 ) {
+    if( Complexity < 1 ) {
         psEncC->pitchEstimationComplexity       = SILK_PE_MIN_COMPLEX;
         psEncC->pitchEstimationThreshold_Q16    = SILK_FIX_CONST( 0.8, 16 );
         psEncC->pitchEstimationLPCOrder         = 6;
@@ -330,7 +330,7 @@ static opus_int silk_setup_complexity(
         psEncC->LTPQuantLowComplexity           = 1;
         psEncC->NLSF_MSVQ_Survivors             = 2;
         psEncC->warping_Q16                     = 0;
-    } else if( Complexity < 4 ) {
+    } else if( Complexity < 2 ) {
         psEncC->pitchEstimationComplexity       = SILK_PE_MID_COMPLEX;
         psEncC->pitchEstimationThreshold_Q16    = SILK_FIX_CONST( 0.76, 16 );
         psEncC->pitchEstimationLPCOrder         = 8;
@@ -341,6 +341,28 @@ static opus_int silk_setup_complexity(
         psEncC->LTPQuantLowComplexity           = 0;
         psEncC->NLSF_MSVQ_Survivors             = 3;
         psEncC->warping_Q16                     = 0;
+    } else if( Complexity < 3 ) {
+        psEncC->pitchEstimationComplexity       = SILK_PE_MIN_COMPLEX;
+        psEncC->pitchEstimationThreshold_Q16    = SILK_FIX_CONST( 0.8, 16 );
+        psEncC->pitchEstimationLPCOrder         = 6;
+        psEncC->shapingLPCOrder                 = 8;
+        psEncC->la_shape                        = 3 * psEncC->fs_kHz;
+        psEncC->nStatesDelayedDecision          = 2;
+        psEncC->useInterpolatedNLSFs            = 0;
+        psEncC->LTPQuantLowComplexity           = 1;
+        psEncC->NLSF_MSVQ_Survivors             = 2;
+        psEncC->warping_Q16                     = 0;
+    } else if( Complexity < 4 ) {
+        psEncC->pitchEstimationComplexity       = SILK_PE_MID_COMPLEX;
+        psEncC->pitchEstimationThreshold_Q16    = SILK_FIX_CONST( 0.76, 16 );
+        psEncC->pitchEstimationLPCOrder         = 8;
+        psEncC->shapingLPCOrder                 = 10;
+        psEncC->la_shape                        = 5 * psEncC->fs_kHz;
+        psEncC->nStatesDelayedDecision          = 2;
+        psEncC->useInterpolatedNLSFs            = 0;
+        psEncC->LTPQuantLowComplexity           = 0;
+        psEncC->NLSF_MSVQ_Survivors             = 4;
+        psEncC->warping_Q16                     = 0;
     } else if( Complexity < 6 ) {
         psEncC->pitchEstimationComplexity       = SILK_PE_MID_COMPLEX;
         psEncC->pitchEstimationThreshold_Q16    = SILK_FIX_CONST( 0.74, 16 );