author jmvalin Tue, 23 Apr 2002 08:12:24 +0000 (08:12 +0000) committer jmvalin Tue, 23 Apr 2002 08:12:24 +0000 (08:12 +0000)
periods shorter than subframe length. Slightly improved multi-pulse
search.

git-svn-id: http://svn.xiph.org/trunk/speex@3253 0101bb08-14d6-0310-b084-bc0e0c8e3800

16 files changed:
 libspeex/Makefile.am patch | blob | history libspeex/cb_search.c patch | blob | history libspeex/cb_search.h patch | blob | history libspeex/filters.c patch | blob | history libspeex/filters.h patch | blob | history libspeex/hexc_table.c [new file with mode: 0644] patch | blob libspeex/ltp.c patch | blob | history libspeex/ltp.h patch | blob | history libspeex/modes.c patch | blob | history libspeex/modes.h patch | blob | history libspeex/mpulse.c patch | blob | history libspeex/sb_celp.c patch | blob | history libspeex/sb_celp.h patch | blob | history libspeex/speex.c patch | blob | history libspeex/speex.h patch | blob | history libspeex/testenc_sb.c patch | blob | history

index 46ee572..326f28e 100644 (file)
@@ -1,6 +1,6 @@
## Process this file with automake to produce Makefile.in. -*-Makefile-*-

-# \$Id: Makefile.am,v 1.21 2002/04/10 07:42:17 jmvalin Exp \$
+# \$Id: Makefile.am,v 1.22 2002/04/23 08:12:23 jmvalin Exp \$

# Disable automatic dependency tracking if using other tools than gcc and gmake
#AUTOMAKE_OPTIONS = no-dependencies
@@ -32,7 +32,8 @@ libspeex_la_SOURCES = speex.c \
mpulse.c \
exc_sb_table.c \
high_lsp_tables.c \
-       vbr.c
+       vbr.c \
+       hexc_table.c

index 9e2f56c..23c4ae4 100644 (file)
#include "vq.h"
#include "matrix.h"

+#define min(a,b) ((a) < (b) ? (a) : (b))
+#define max(a,b) ((a) > (b) ? (a) : (b))
+
+
static float scal_gains4[16] = {
0.27713,
0.49282,
@@ -121,7 +125,7 @@ float *stack
d += target[i]*resp[i];
e += resp[i]*resp[i];
}
-    g = d/(e+.1);
+    g = d/(e+.0001);
score = g*d;
/*printf ("score: %f %f %f %f\n", target[0],d,e,score);*/
if (score >= bscore) {
@@ -315,6 +319,368 @@ float *stack
POP(stack);
}

+void split_cb_search_nogain(
+float target[],                        /* target vector */
+float ak[],                    /* LPCs for this subframe */
+float awk1[],                  /* Weighted LPCs for this subframe */
+float awk2[],                  /* Weighted LPCs for this subframe */
+void *par,                      /* Codebook/search parameters*/
+int   p,                        /* number of LPC coeffs */
+int   nsf,                      /* number of samples in subframe */
+float *exc,
+FrameBits *bits,
+float *stack
+)
+{
+   int i,j;
+   float *resp;
+   float *t, *r, *e;
+   int *ind;
+   float *shape_cb;
+   int shape_cb_size, subvect_size, nb_subvect;
+   split_cb_params *params;
+
+   params = (split_cb_params *) par;
+   subvect_size = params->subvect_size;
+   nb_subvect = params->nb_subvect;
+   shape_cb_size = 1<<params->shape_bits;
+   shape_cb = params->shape_cb;
+   resp = PUSH(stack, shape_cb_size*subvect_size);
+   t = PUSH(stack, nsf);
+   r = PUSH(stack, nsf);
+   e = PUSH(stack, nsf);
+   ind = (int*)PUSH(stack, nb_subvect);
+
+   for (i=0;i<nsf;i++)
+      t[i]=target[i];
+
+   e[0]=1;
+   for (i=1;i<nsf;i++)
+      e[i]=0;
+   residue_zero(e, awk1, r, nsf, p);
+   syn_filt_zero(r, ak, r, nsf, p);
+   syn_filt_zero(r, awk2, r, nsf,p);
+
+   /* Pre-compute codewords response and energy */
+   for (i=0;i<shape_cb_size;i++)
+   {
+      float *res = resp+i*subvect_size;
+
+      /* Compute codeword response */
+      int k;
+      for(j=0;j<subvect_size;j++)
+         res[j]=0;
+      for(j=0;j<subvect_size;j++)
+      {
+         for (k=j;k<subvect_size;k++)
+            res[k]+=shape_cb[i*subvect_size+j]*r[k-j];
+      }
+   }
+
+   for (i=0;i<nb_subvect;i++)
+   {
+      int best_index=0, k, m;
+      float g, dist, best_dist=-1;
+      float *a, *b;
+      /* Find best codeword for current sub-vector */
+      for (j=0;j<shape_cb_size;j++)
+      {
+         dist=0;
+         a=resp+j*subvect_size;
+         b=t+subvect_size*i;
+         for (k=0;k<subvect_size;k++)
+            dist += (a[k]-b[k])*(a[k]-b[k]);
+         if (dist<best_dist || j==0)
+         {
+            best_dist=dist;
+            best_index=j;
+         }
+      }
+      /*printf ("best index: %d/%d\n", best_index, shape_cb_size);*/
+      frame_bits_pack(bits,best_index,params->shape_bits);
+
+      ind[i]=best_index;
+      /* Update target for next subvector */
+      for (j=0;j<subvect_size;j++)
+      {
+         g=shape_cb[best_index*subvect_size+j];
+         for (k=subvect_size*i+j,m=0;k<nsf;k++,m++)
+            t[k] -= g*r[m];
+      }
+   }
+
+   /* Put everything back together */
+   for (i=0;i<nb_subvect;i++)
+      for (j=0;j<subvect_size;j++)
+         e[subvect_size*i+j]=shape_cb[ind[i]*subvect_size+j];
+
+   /* Update excitation */
+   for (j=0;j<nsf;j++)
+      exc[j]+=e[j];
+
+   /* Update target */
+   residue_zero(e, awk1, r, nsf, p);
+   syn_filt_zero(r, ak, r, nsf, p);
+   syn_filt_zero(r, awk2, r, nsf,p);
+   for (j=0;j<nsf;j++)
+      target[j]-=r[j];
+
+
+
+
+   POP(stack);
+   POP(stack);
+   POP(stack);
+   POP(stack);
+}
+
+
+
+
+void split_cb_search2(
+float target[],                        /* target vector */
+float ak[],                    /* LPCs for this subframe */
+float awk1[],                  /* Weighted LPCs for this subframe */
+float awk2[],                  /* Weighted LPCs for this subframe */
+void *par,                      /* Codebook/search parameters*/
+int   p,                        /* number of LPC coeffs */
+int   nsf,                      /* number of samples in subframe */
+float *exc,
+FrameBits *bits,
+float *stack
+)
+{
+   int i,j, id;
+   float *resp, *E, q;
+   float *t, *r, *e;
+   float *gains;
+   int *ind;
+   float *shape_cb;
+   int shape_cb_size, subvect_size, nb_subvect;
+   float exc_energy=0;
+   split_cb_params *params;
+
+   params = (split_cb_params *) par;
+   subvect_size = params->subvect_size;
+   nb_subvect = params->nb_subvect;
+   shape_cb_size = 1<<params->shape_bits;
+   shape_cb = params->shape_cb;
+   resp = PUSH(stack, shape_cb_size*subvect_size);
+   E = PUSH(stack, shape_cb_size);
+   t = PUSH(stack, nsf);
+   r = PUSH(stack, nsf);
+   e = PUSH(stack, nsf);
+   gains = PUSH(stack, nb_subvect);
+   ind = (int*)PUSH(stack, nb_subvect);
+
+   /* Compute energy of the "real excitation" */
+   syn_filt_zero(target, awk1, e, nsf, p);
+   residue_zero(e, ak, e, nsf, p);
+   residue_zero(e, awk2, e, nsf, p);
+   for (i=0;i<nsf;i++)
+      exc_energy += e[i]*e[i];
+   exc_energy=sqrt(exc_energy/nb_subvect);
+
+   /* Quantize global ("average") gain */
+   q=log(exc_energy+.1);
+   q=floor(.5+2*(q-2));
+   if (q<0)
+      q=0;
+   if (q>15)
+      q=15;
+   id = (int)q;
+   frame_bits_pack(bits, id, 4);
+   exc_energy=exp(.5*q+2);
+
+
+   for (i=0;i<nsf;i++)
+      t[i]=target[i];
+
+   e[0]=1;
+   for (i=1;i<nsf;i++)
+      e[i]=0;
+   residue_zero(e, awk1, r, nsf, p);
+   syn_filt_zero(r, ak, r, nsf, p);
+   syn_filt_zero(r, awk2, r, nsf,p);
+
+   /* Pre-compute codewords response and energy */
+   for (i=0;i<shape_cb_size;i++)
+   {
+      float *res = resp+i*subvect_size;
+
+      /* Compute codeword response */
+      int k;
+      for(j=0;j<subvect_size;j++)
+         res[j]=0;
+      for(j=0;j<subvect_size;j++)
+      {
+         for (k=j;k<subvect_size;k++)
+            res[k]+=shape_cb[i*subvect_size+j]*r[k-j];
+      }
+      /* Compute energy of codeword response */
+      E[i]=0;
+      for(j=0;j<subvect_size;j++)
+         E[i]+=res[j]*res[j];
+      E[i]=1/(.001+E[i]);
+   }
+
+   for (i=0;i<nb_subvect;i++)
+   {
+      int best_index[2]={0,0}, k, m;
+      float g, corr, best_gain[2]={0,0}, score, best_score[2]={-1,-1};
+      /* Find best codeword for current sub-vector */
+      for (j=0;j<shape_cb_size;j++)
+      {
+         corr=xcorr(resp+j*subvect_size,t+subvect_size*i,subvect_size);
+         score=corr*corr*E[j];
+         g = corr*E[j];
+         if (score>best_score[0])
+         {
+            best_index[1]=best_index[0];
+            best_score[1]=best_score[0];
+            best_gain[1]=best_gain[0];
+
+            best_index[0]=j;
+            best_score[0]=score;
+            best_gain[0]=g;
+         } else if (score>best_score[1]) {
+            best_index[1]=j;
+            best_score[1]=score;
+            best_gain[1]=g;
+         }
+      }
+
+      /* Quantize gain */
+      for (k=0;k<2;k++) {
+         int s=0, best_id;
+         best_gain[k] /= .01+exc_energy;
+         if (best_gain[k]<0)
+         {
+            best_gain[k]=-best_gain[k];
+            s=1;
+         }
+
+         /* Find gain index (it's a scalar but we use the VQ code anyway)*/
+         best_id = vq_index(&best_gain[k], scal_gains4, 1, 8);
+
+         best_gain[k]=scal_gains4[best_id];
+         /*printf ("gain_quant: %f %d %f\n", best_gain, best_id, scal_gains4[best_id]);*/
+         if (s)
+            best_gain[k]=-best_gain[k];
+         best_gain[k] *= exc_energy;
+      }
+
+
+
+      if (i<nb_subvect-1) {
+         int best_index2=0;
+         float best_score2=-1, best_gain2=0;
+         int nbest, best;
+         float err[2]={0,0};
+         float *tt=PUSH(stack,nsf);
+         for (nbest=0;nbest<2;nbest++)
+         {
+            for (j=0;j<nsf;j++)
+               tt[j]=t[j];
+            for (j=0;j<subvect_size;j++)
+            {
+               g=best_gain[nbest]*shape_cb[best_index[nbest]*subvect_size+j];
+               for (k=subvect_size*i+j,m=0;k<nsf;k++,m++)
+                  tt[k] -= g*r[m];
+            }
+
+
+            for (j=0;j<shape_cb_size;j++)
+            {
+               corr=xcorr(resp+j*subvect_size,tt+subvect_size*(i+1),subvect_size);
+               score=corr*corr*E[j];
+               g = corr*E[j];
+               if (score>best_score2)
+               {
+                  best_index2=j;
+                  best_score2=score;
+                  best_gain2=g;
+               }
+            }
+
+            {
+               int s=0, best_id;
+               best_gain2 /= .01+exc_energy;
+               if (best_gain2<0)
+               {
+                  best_gain2=-best_gain2;
+                  s=1;
+               }
+               best_id = vq_index(&best_gain2, scal_gains4, 1, 8);
+               best_gain2=scal_gains4[best_id];
+               if (s)
+                  best_gain2=-best_gain2;
+               best_gain2 *= exc_energy;
+            }
+
+            for (j=0;j<subvect_size;j++)
+            {
+               g=best_gain2*shape_cb[best_index2*subvect_size+j];
+               for (k=subvect_size*(i+1)+j,m=0;k<nsf;k++,m++)
+                  tt[k] -= g*r[m];
+            }
+            for (j=subvect_size*i;j<subvect_size*(i+2);j++)
+               err[nbest]-=tt[j]*tt[j];
+
+            best_score[nbest]=err[nbest];
+         }
+
+         if (best_score[1]>best_score[0])
+         {
+            best_index[0]=best_index[1];
+            best_score[0]=best_score[1];
+            best_gain[0]=best_gain[1];
+
+         }
+         POP(stack);
+      }
+
+
+
+
+      ind[i]=best_index[0];
+      gains[i]=best_gain[0];
+      /* Update target for next subvector */
+      for (j=0;j<subvect_size;j++)
+      {
+         g=best_gain[0]*shape_cb[best_index[0]*subvect_size+j];
+         for (k=subvect_size*i+j,m=0;k<nsf;k++,m++)
+            t[k] -= g*r[m];
+      }
+   }
+
+   /* Put everything back together */
+   for (i=0;i<nb_subvect;i++)
+      for (j=0;j<subvect_size;j++)
+         e[subvect_size*i+j]=gains[i]*shape_cb[ind[i]*subvect_size+j];
+
+   /* Update excitation */
+   for (j=0;j<nsf;j++)
+      exc[j]+=e[j];
+
+   /* Update target */
+   residue_zero(e, awk1, r, nsf, p);
+   syn_filt_zero(r, ak, r, nsf, p);
+   syn_filt_zero(r, awk2, r, nsf,p);
+   for (j=0;j<nsf;j++)
+      target[j]-=r[j];
+
+
+
+
+   POP(stack);
+   POP(stack);
+   POP(stack);
+   POP(stack);
+   POP(stack);
+   POP(stack);
+}
+

index a4658f3..244ff36 100644 (file)
@@ -56,7 +56,7 @@ FrameBits *bits,
float *stack
);

-void split_cb_search_wb(
+void split_cb_search_nogain(
float target[],                        /* target vector */
float ak[],                    /* LPCs for this subframe */
float awk1[],                  /* Weighted LPCs for this subframe */
@@ -69,6 +69,21 @@ FrameBits *bits,
float *stack
);

+
+void split_cb_search2(
+float target[],                        /* target vector */
+float ak[],                    /* LPCs for this subframe */
+float awk1[],                  /* Weighted LPCs for this subframe */
+float awk2[],                  /* Weighted LPCs for this subframe */
+void *par,                      /* Codebook/search parameters*/
+int   p,                        /* number of LPC coeffs */
+int   nsf,                      /* number of samples in subframe */
+float *exc,
+FrameBits *bits,
+float *stack
+);
+
+
void split_cb_unquant(
float *exc,
void  *par,                     /* Innovation parameters */
index 0bd77a6..41512e6 100644 (file)
*/

#include "filters.h"
+#include <stdio.h>

#define min(a,b) ((a) < (b) ? (a) : (b))

+void print_vec(float *vec, int len, char *name)
+{
+   int i;
+   printf ("%s ", name);
+   for (i=0;i<len;i++)
+      printf (" %f", vec[i]);
+   printf ("\n");
+}
+
void bw_lpc(float gamma, float *lpc_in, float *lpc_out, int order)
{
int i;
index b9d856d..6c7165c 100644 (file)
@@ -20,6 +20,8 @@
#ifndef FILTERS_H
#define FILTERS_H

+void print_vec(float *vec, int len, char *name);
+
/* Apply bandwidth expansion on LPC coef */
void bw_lpc(float gamma, float *lpc_in, float *lpc_out, int order);

diff --git a/libspeex/hexc_table.c b/libspeex/hexc_table.c
new file mode 100644 (file)
index 0000000..e4ae5df
--- /dev/null
@@ -0,0 +1,257 @@
+float hexc_table[256][8]={
+{0,0,0,0,0,0,0,0},
+{-0.124633,0.709134,-0.353292,-0.100011,-4.75254,-1.19492,1.91261,3.17703},
+{7.65722,-5.45083,2.63568,-6.4316,-1.89175,-0.466831,-2.62109,1.40504},
+{-0.196422,3.42049,0.110829,2.61755,0.400882,4.91734,-2.27958,-8.22836},
+{2.89899,0.0536774,-2.33267,-2.22652,0.0327518,0.658552,0.677934,-0.108797},
+{3.91754,0.0948733,3.8366,-3.0895,-0.897586,1.40209,-0.0906191,-2.04542},
+{-0.187855,1.00529,0.698786,1.23539,-0.590565,-0.109911,-2.77967,-1.71522},
+{16.4003,13.6469,12.0238,12.0247,8.99906,6.76874,4.56455,2.57654},
+{-0.677238,-1.43921,-1.51191,-2.87916,4.22053,1.78013,3.3326,-0.52691},
+{-1.23192,4.25223,-2.11896,-2.09635,4.56563,-1.64065,-4.1804,3.06229},
+{2.09639,-1.23159,0.996652,-0.291257,0.503392,-0.263715,0.441603,-0.601744},
+{1.61943,0.259319,3.38506,0.477903,0.211131,-4.09897,-6.17992,0.0711276},
+{0.56057,-7.74415,9.78828,-1.98022,2.16269,4.58076,-3.22997,-0.0438142},
+{-7.7953,2.75296,-1.60745,2.3559,3.03604,-2.70062,-1.08142,1.03708},
+{-0.327143,0.508118,-0.284136,0.436241,-0.362498,0.452651,-0.474024,0.0398583},
+{0.395506,0.0990582,0.0973287,-1.03393,-1.13884,3.93053,2.63491,-3.21285},
+{-0.130276,-1.72332,-8.74412,2.16437,-5.05812,4.47607,4.27328,0.105277},
+{-6.89905,-4.37346,-19.6116,-0.803085,-24.817,37.3571,-4.92721,165.926},
+{2.60235,-7.67724,-2.17454,-3.13947,-0.871546,1.46517,3.00854,0.750017},
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+{0.204318,-1.18495,1.69611,-5.87154,-1.09162,-3.17763,3.81016,5.46422},
+{32.3196,-26.4305,-15.3083,13.389,5.29654,1.3497,-4.56716,-3.0803},
+{1.75226,-2.95783,0.0391654,1.43998,4.32347,4.63445,12.0214,-24.3157},
+{5.73897,1.50275,-2.59347,-9.41519,-2.96615,6.11175,0.653714,-0.566137},
+{2.98372,-2.72632,0.749759,-1.00422,-1.43957,1.27977,-1.67646,0.877245},
+{0.548712,0.597705,0.0164013,1.39439,-1.68985,-0.39492,-0.406022,0.299087},
+{45.7234,23.3769,4.62083,7.01499,9.78483,13.3994,9.72012,5.72552},
+{-2.09919,1.06592,1.32802,-20.703,10.3256,3.93026,-2.9109,9.97675},
+{-0.865733,-0.363424,0.614046,0.788532,1.07512,2.0567,-3.31456,0.769445},
+{1.16772,0.29314,1.08944,-3.30867,0.437565,-1.73196,0.469983,-0.020718},
+{0.804264,8.93642,0.298777,1.65058,-0.278129,-6.2409,-4.30878,-2.51514},
+{1.45749,-5.4972,1.59904,2.36218,0.62901,-0.398502,-0.37127,-0.128095},
+{-1.15142,1.15667,0.533943,-0.638291,0.748438,-0.236054,-0.371887,0.0551342},
+{-0.0134577,0.917125,-0.692473,-1.38295,0.651743,1.16129,-0.16168,-0.353701},
+{3.09101,1.25459,3.52712,-4.66651,-8.30614,1.94741,3.66175,-2.53572},
+{-3.79474,-1.2712,1.5456,-5.77896,-2.15106,5.52802,5.16584,-0.824595},
+{-1.29917,-0.152905,-1.49112,-0.957469,-1.15177,5.20993,-1.30904,16.5467},
+{1.6654,-1.494,-1.42496,1.55172,0.307429,0.349257,-1.20406,0.389077},
+{0.429784,0.608935,0.751754,-0.0494915,0.731098,-1.55255,0.911601,-4.40677},
+{2.00906,1.05476,-0.327177,2.06333,-0.814492,2.24618,-6.00176,-1.77531},
+{4.66946,4.38809,5.58569,-7.918,-0.289225,-3.45762,-4.3845,3.00876},
+{-1.17988,1.13447,-1.68267,1.46021,-1.27858,1.60578,-1.19326,1.0592},
+{2.26378,1.9471,2.2834,2.20481,1.28164,1.31936,0.723912,0.264843},
+{2.59296,-1.12518,-7.86353,-3.44897,3.48369,4.15248,0.678701,3.28794},
+{1.02773,1.39452,1.05653,0.687331,0.512416,-1.20686,-0.451067,-0.726915},
+{-2.20508,-0.946671,-0.383217,-2.59423,-0.127601,0.181709,2.13321,1.07847},
+{5.11053,0.787867,-5.00871,9.78689,-0.698865,-2.33587,4.06018,-6.26019},
+{-3.08775,0.00788429,-1.37288,0.830455,1.50064,3.72122,0.519269,-0.174458},
+{-8.65087,0.420658,4.19734,-2.53148,2.00787,3.44438,0.479103,1.88357},
+{0.670846,0.175748,0.388663,-0.392712,1.34099,0.27084,-2.14573,-0.817875},
+{-3.82491,10.8946,-0.724208,-7.25032,-0.906455,-0.968595,3.10847,-0.953001},
+{-60.2306,-66.0493,-52.769,-28.5048,-18.995,-24.6236,-14.8306,-4.60763},
+{-1.28833,-3.36615,-1.12593,1.72623,2.03918,-3.13427,1.83378,3.2688},
+{-1.41746,-5.77968,2.05356,4.39273,-4.71032,0.525318,4.17257,0.33712},
+{0.489101,0.986629,2.88171,3.26994,4.87412,-7.68866,-0.255392,-5.86123},
+{-0.486568,3.64866,-1.18497,-2.56582,-1.86345,3.97503,-1.60875,-1.51483},
+{0.0224374,0.447103,2.57407,-1.17341,0.0103403,0.097923,-0.588402,-0.3276},
+{-1.50035,-0.588047,-2.79878,2.95604,1.49174,-0.281278,-0.104843,0.95529},
+{43.8765,68.9196,53.5544,18.5602,-7.28795,-6.17145,11.5068,11.8125},
+{1.93415,-0.764005,-3.39096,1.811,5.07884,-5.5778,-3.31742,4.42688},
+{-0.844518,-1.0928,-1.23793,-1.94435,-0.671152,3.08139,1.31817,6.51686},
+{-1.15335,-1.41424,2.53316,-0.165687,0.285124,-2.28472,2.47299,-0.78268},
+{2.00046,-3.08138,-3.03712,0.584362,4.23179,0.551653,-2.76306,-2.11327},
+{-2.29126,-4.45644,2.27253,-1.606,0.427992,2.66471,0.116678,1.07283},
+{-5.0359,6.43669,3.4784,-0.091146,-1.32296,0.266394,-1.44734,-0.928342},
+{0.0439666,-0.483358,-0.0579151,0.242941,-0.230237,0.116684,0.153393,0.37601},
+{0.507153,1.08043,0.560109,0.292706,-3.98339,2.15313,-1.38018,0.420253},
+{-0.13139,-0.382544,-2.22085,-1.24414,-0.845732,1.22189,11.8253,-3.55114},
+{-1.02419,2.41956,1.70631,-0.921757,-1.97945,-8.94564,-21.8953,7.22507},
+{0.959283,0.968234,-1.83562,0.419404,0.0721482,-0.314022,-0.0424927,-0.102174},
+{0.248888,-0.164755,-0.300158,-0.369368,0.229399,-0.207267,3.28298,-1.61728},
+{-1.24941,-0.21401,0.769815,-2.09711,4.46625,5.15347,-2.03265,-1.19599},
+{-3.15887,0.00237708,2.5495,4.70987,-2.47164,-3.74927,2.03071,4.01164},
+{0.525486,4.87947,-3.32576,-1.7101,-1.90991,-0.0993742,1.96111,-1.32008},
+{3.02228,5.57303,0.0510654,-0.70773,1.60367,-0.535712,-0.100697,-0.543199},
+{-0.627222,2.10949,-2.63038,-1.13644,1.7397,-2.35395,1.30674,0.715664},
+{0.657966,-0.930129,1.1111,0.196496,-0.821329,-2.62898,0.905887,2.76431},
+{0.158239,-2.62874,0.887907,-0.0719686,-2.34732,0.274504,1.60437,-0.333946},
+{-0.41052,-4.0426,4.87021,13.4334,-3.81333,-8.63686,-4.28218,-0.323974},
+{-9.14699,-2.17646,7.44449,7.06822,2.33518,1.29543,-4.89149,0.13786},
+{-11.7021,5.09057,1.69011,7.30886,1.32423,0.0720759,3.78273,-0.839777},
+{-3.29212,1.23263,-0.453421,0.690821,0.467484,-0.463127,1.26455,-0.327746},
+{1.33427,1.86117,0.160804,-1.15946,-1.11658,-0.125074,-0.0105876,-0.194273}};
index 44b2da6..c891505 100644 (file)
@@ -327,7 +327,7 @@ float *stack

/** Finds the best quantized 3-tap pitch predictor by analysis by synthesis */
-void pitch_search_3tap(
+int pitch_search_3tap(
float target[],                 /* Target vector */
float ak[],                     /* LPCs for this subframe */
float awk1[],                   /* Weighted LPCs #1 for this subframe */
@@ -339,12 +339,14 @@ int   end,                      /* Largest pitch value allowed */
int   p,                        /* Number of LPC coeffs */
int   nsf,                      /* Number of samples in subframe */
FrameBits *bits,
-float *stack
+float *stack,
+float *exc2
)
{
int i,j;
-   float *tmp;
+   float *tmp, *tmp2;
float *x[3];
+   float *e[3];
float corr[3];
float A[3][3];
float gain[3];
@@ -355,14 +357,20 @@ float *stack
gain_cdbk=params->gain_cdbk;
gain_cdbk_size=1<<params->gain_bits;
tmp = PUSH(stack, 3*nsf);
+   tmp2 = PUSH(stack, 3*nsf);

x[0]=tmp;
x[1]=tmp+nsf;
x[2]=tmp+2*nsf;

+   e[0]=tmp2;
+   e[1]=tmp2+nsf;
+   e[2]=tmp2+2*nsf;
+
/* Perform closed-loop 1-tap search*/
+   /* FIXME: Should better handle short (<nsf) pitch periods*/
overlap_cb_search(target, ak, awk1, awk2,
-                     &exc[-end], end-start+1, gain, &pitch, p,
+                     &exc2[-end], end-start+1, gain, &pitch, p,
nsf, stack);
/* Real pitch value */
pitch=end-pitch;
@@ -370,7 +378,15 @@ float *stack

for (i=0;i<3;i++)
{
-      residue_zero(&exc[-pitch-1+i],awk1,x[i],nsf,p);
+      int pp=pitch+1-i;
+      for (j=0;j<nsf;j++)
+      {
+         if (j-pp<0)
+            e[i][j]=exc2[j-pp];
+         else
+            e[i][j]=exc2[j-pp-pitch];
+      }
+      residue_zero(e[i],awk1,x[i],nsf,p);
syn_filt_zero(x[i],ak,x[i],nsf,p);
syn_filt_zero(x[i],awk2,x[i],nsf,p);
}
@@ -404,6 +420,11 @@ float *stack
ptr = gain_cdbk+12*i;
for (j=0;j<9;j++)
sum+=C[j]*ptr[j+3];
+         if (0) {
+            float tot=ptr[0]+ptr[1]+ptr[2];
+            if (tot < 1.1)
+               sum *= 1+.15*tot;
+         }
if (sum>best_sum || i==0)
{
best_sum=sum;
@@ -418,10 +439,8 @@ float *stack

}

-   /*FIXME: backward or forward? (ie recursive or not?)*/
-   /*for (i=0;i<nsf;i++)*/
-   for (i=nsf-1;i>=0;i--)
-      exc[i]=gain[0]*exc[i-pitch+1]+gain[1]*exc[i-pitch]+gain[2]*exc[i-pitch-1];
+   for (i=0;i<nsf;i++)
+      exc[i]=gain[0]*e[2][i]+gain[1]*e[1][i]+gain[2]*e[0][i];
#ifdef DEBUG
printf ("3-tap pitch = %d, gains = [%f %f %f]\n",pitch, gain[0], gain[1], gain[2]);
{
@@ -434,6 +453,7 @@ float *stack
printf ("prediction gain = %f\n",tmp1/(tmp2+1));
}
#endif
+   return pitch;
}

index 31bd1e2..4c74343 100644 (file)
@@ -50,7 +50,7 @@ float *stack

/** Finds the best quantized 3-tap pitch predictor by analysis by synthesis */
-void pitch_search_3tap(
+int pitch_search_3tap(
float target[],                 /* Target vector */
float ak[],                     /* LPCs for this subframe */
float awk1[],                   /* Weighted LPCs #1 for this subframe */
@@ -62,7 +62,8 @@ int   end,                      /* Largest pitch value allowed */
int   p,                        /* Number of LPC coeffs */
int   nsf,                      /* Number of samples in subframe */
FrameBits *bits,
-float *stack
+float *stack,
+float *exc2
);

/** Finds the best quantized 3-tap pitch predictor by analysis by synthesis */
index 081c799..ecc98cc 100644 (file)
@@ -67,17 +67,17 @@ split_cb_params split_cb_wb = {
};

mpulse_params mpulse_nb = {
-   12,     /*nb_pulse*/
-   4,      /*nb_tracks*/
-   2.2,    /*gain_coef*/
+   15,     /*nb_pulse*/
+   5,      /*nb_tracks*/
+   4,    /*gain_coef*/
10
};

mpulse_params mpulse_sb = {
-   50,     /*nb_pulse*/
-   10,      /*nb_tracks*/
-   2.5,    /*gain_coef*/
+   25,     /*nb_pulse*/
+   5,      /*nb_tracks*/
+   3.8,    /*gain_coef*/
10
};

@@ -205,10 +205,10 @@ SpeexMode mp_sb_mode = {
640,    /*bufSize*/
17,     /*pitchStart*/
144,    /*pitchEnd*/
-   0.9,    /*gamma1*/
+   .9,    /*gamma1*/
0.6,    /*gamma2*/
.002,   /*lag_factor*/
-   1.0001, /*lpc_floor*/
+   1.00005, /*lpc_floor*/
0.0,    /*preemph*/
/*LSP quantization*/
lsp_quant_nb,
@@ -219,7 +219,7 @@ SpeexMode mp_sb_mode = {
&ltp_params_nb,
/*Innovation quantization*/
#if 1
-   split_cb_search,
+   split_cb_search2,
split_cb_unquant,
&split_cb_sb
#else
index b3dd0e9..33396b9 100644 (file)
@@ -32,9 +32,9 @@ typedef void (*lsp_unquant_func)(float *, int, FrameBits *);

/*Long-term predictor quantization*/
-typedef void (*ltp_quant_func)(float *, float *, float *,
+typedef int (*ltp_quant_func)(float *, float *, float *,
float *, float *, void *, int, int,
-                                int, int, FrameBits*, float *);
+                                int, int, FrameBits*, float *, float *);

/*Long-term un-quantize*/
typedef void (*ltp_unquant_func)(float *, int, int, void *, int, FrameBits*, float*);
index 26e8f4c..986e24e 100644 (file)
@@ -292,7 +292,7 @@ float *stack
float dist;
float *base=t+j;
/*Fill any track until it's full*/
-         if (nb[j%nb_tracks]==pulses_per_track)
+         if (nb[j%nb_tracks]==pulses_per_track || nb[j%nb_tracks] > (i)/nb_tracks)
continue;
/*Constrain search in alternating tracks*/
/*FIXME: Should get rid of this, it's *really* slow*/
index 60dd073..0933001 100644 (file)
@@ -69,6 +69,7 @@ float quant_high_gain2[8] = {
2.25160,
};

+
#if 0
#define QMF_ORDER 32
static float h0[32] = {
@@ -191,6 +192,7 @@ void sb_encoder_init(SBEncState *st, SpeexMode *mode)
st->nbSubframes = st->st_low.nbSubframes;
st->windowSize = mode->windowSize;
st->lpcSize=8;
+   st->bufSize=st->st_low.bufSize;

st->lag_factor = .002;
st->lpc_floor = 1.0001;
@@ -213,8 +215,9 @@ void sb_encoder_init(SBEncState *st, SpeexMode *mode)
st->g1_mem=calloc(QMF_ORDER, sizeof(float));

st->buf=calloc(st->windowSize, sizeof(float));
-   st->excBuf=calloc(2*st->frame_size, sizeof(float));
-   st->exc=st->excBuf+st->frame_size;
+   st->excBuf=calloc(st->bufSize, sizeof(float));
+   st->exc = st->excBuf + st->bufSize - st->windowSize;
+   /*st->exc=st->excBuf+st->frame_size;*/

st->res=calloc(st->frame_size, sizeof(float));
st->sw=calloc(st->frame_size, sizeof(float));
@@ -291,6 +294,13 @@ void sb_encoder_destroy(SBEncState *st)

}

+extern float hexc_table[];
+split_cb_params split_cb_high = {
+   8,               /*subvect_size*/
+   5,               /*nb_subvect*/
+   hexc_table,       /*shape_cb*/
+   8,               /*shape_bits*/
+};

void sb_encode(SBEncState *st, float *in, FrameBits *bits)
{
@@ -310,11 +320,13 @@ void sb_encode(SBEncState *st, float *in, FrameBits *bits)
/* High-band buffering / sync with low band */
for (i=0;i<st->frame_size;i++)
{
-      st->excBuf[i]=st->exc[i];
+      /*st->excBuf[i]=st->exc[i];*/
st->high[i]=st->high[st->frame_size+i];
st->high[st->frame_size+i]=st->x1d[i];
}

+   memmove(st->excBuf, st->excBuf+st->frame_size, (st->bufSize-st->frame_size)*sizeof(float));
+
/* Start encoding the high-band */

for (i=0;i<st->windowSize;i++)
@@ -353,8 +365,8 @@ void sb_encode(SBEncState *st, float *in, FrameBits *bits)
printf (" %f", st->lsp[i]);
printf ("\n");
for (i=0;i<st->lpcSize;i++)
-   st->qlsp[i]=st->lsp[i];
-   */
+   st->qlsp[i]=st->lsp[i];*/
+

if (st->first)
{
@@ -412,6 +424,7 @@ void sb_encode(SBEncState *st, float *in, FrameBits *bits)
rh=1/(fabs(rh)+.001);
/* Compute ratio, will help predict the gain */
filter_ratio=fabs(.001+rh)/(.001+fabs(rl));
+

if (0) {/* 1 for spectral folding excitation, 0 for stochastic */
float el=0,eh=0,g;
@@ -420,13 +433,23 @@ void sb_encode(SBEncState *st, float *in, FrameBits *bits)
mem[i]=st->mem_sp[i];
/* Compute "real excitation" */
residue_mem(sp, st->interp_qlpc, exc, st->subframeSize, st->lpcSize, st->mem_sp);
-
+
+#if 0
/* Compute energy of low-band and high-band excitation */
for (i=0;i<st->subframeSize;i++)
eh+=sqr(exc[i]);
for (i=0;i<st->subframeSize;i++)
el+=sqr(st->st_low.exc[offset+i]);
-
+
+         for (i=0;i<st->subframeSize;i++)
+         {
+            float p=(.1+exc[i])*filter_ratio/(1+sqrt(el/st->subframeSize));
+            if (i%8==0)
+               printf ("\nhexc: ");
+            printf ("%f ", p);
+         }
+         printf ("\n");
+
/* Gain to use if we want to use the low-band excitation for high-band */
g=eh/(.01+el);
g=sqrt(g);
@@ -436,11 +459,10 @@ void sb_encode(SBEncState *st, float *in, FrameBits *bits)
exc[i]=g*st->st_low.exc[offset+i];

/* FIXME: Should encode the gain here */
-
+#endif
/* Update the input signal using the non-coded memory */
syn_filt_mem(exc, st->interp_qlpc, sp, st->subframeSize, st->lpcSize, mem);
-
-      } else {/* Stochastic split-VQ excitation */
+      } else if (0) {/* Stochastic split-VQ excitation */
int k,N=4;
float el=0,eh=0,eb=0,g;
int *index;
@@ -481,10 +503,14 @@ void sb_encode(SBEncState *st, float *in, FrameBits *bits)
/* Energy of "real excitation" */
for (i=0;i<st->subframeSize;i++)
eh+=sqr(exc[i]);
-
+
for (i=0;i<st->subframeSize;i++)
exc[i]=0;
-
+         /*
+st->st_low.ltp_quant(target, st->interp_qlpc, st->bw_lpc1, st->bw_lpc2,
+                    exc, st->st_low.ltp_params, st->st_low.min_pitch, st->st_low.max_pitch,
+                    st->lpcSize, st->subframeSize, bits, st->stack, exc);
+         */
/* For all sub-vectors, find best gain and codeword/shape */
for (k=0;k<N;k++)
{
@@ -556,11 +582,70 @@ void sb_encode(SBEncState *st, float *in, FrameBits *bits)
/* FIXME: Should we use the "adjusted excitation" in the encoder? */
for (i=0;i<st->subframeSize/N;i++)
exc[of+i]=gains[k]*stoc[index[k]+i];
+
}
POP(st->stack);
POP(st->stack);
+
+
+         /*Keep the previous memory*/
+         for (i=0;i<st->lpcSize;i++)
+            mem[i]=st->mem_sp[i];
+         /* Final signal synthesis from excitation */
+         syn_filt_mem(exc, st->interp_qlpc, sp, st->subframeSize, st->lpcSize, st->mem_sp);

+         /* Compute weighted signal again, from synthesized speech (not sure it's the right thing) */
+         residue_mem(sp, st->bw_lpc1, sw, st->subframeSize, st->lpcSize, mem);
+         syn_filt_mem(sw, st->bw_lpc2, sw, st->subframeSize, st->lpcSize, st->mem_sw);
+      } else {
+         float el=0;
+         float gc;
+
+         for (i=0;i<st->subframeSize;i++)
+            el+=sqr(st->st_low.exc[offset+i]);
+
+         gc = (.01+filter_ratio)/(1+sqrt(el/st->subframeSize));
+
+         /* Reset excitation */
+         for (i=0;i<st->subframeSize;i++)
+            exc[i]=0;

+         /* Compute zero response (ringing) of A(z/g1) / ( A(z/g2) * Aq(z) ) */
+         for (i=0;i<st->lpcSize;i++)
+            mem[i]=st->mem_sp[i];
+         syn_filt_mem(exc, st->interp_qlpc, exc, st->subframeSize, st->lpcSize, mem);
+         for (i=0;i<st->lpcSize;i++)
+            mem[i]=st->mem_sp[i];
+         residue_mem(exc, st->bw_lpc1, res, st->subframeSize, st->lpcSize, mem);
+         for (i=0;i<st->lpcSize;i++)
+            mem[i]=st->mem_sw[i];
+         syn_filt_mem(res, st->bw_lpc2, res, st->subframeSize, st->lpcSize, mem);
+
+         /* Compute weighted signal */
+         for (i=0;i<st->lpcSize;i++)
+            mem[i]=st->mem_sp[i];
+         residue_mem(sp, st->bw_lpc1, sw, st->subframeSize, st->lpcSize, mem);
+         for (i=0;i<st->lpcSize;i++)
+            mem[i]=st->mem_sw[i];
+         syn_filt_mem(sw, st->bw_lpc2, sw, st->subframeSize, st->lpcSize, mem);
+
+         /* Compute target signal */
+         for (i=0;i<st->subframeSize;i++)
+            target[i]=gc*(sw[i]-res[i]);
+
+         /* Reset excitation */
+         for (i=0;i<st->subframeSize;i++)
+            exc[i]=0;
+
+         print_vec(target, st->subframeSize, "\ntarget");
+         split_cb_search_nogain(target, st->interp_qlpc, st->bw_lpc1, st->bw_lpc2,
+                                &split_cb_high, st->lpcSize, st->subframeSize,
+                                exc, bits, st->stack);
+         print_vec(target, st->subframeSize, "after");
+
+         for (i=0;i<st->subframeSize;i++)
+            exc[i] *= 1/gc;
+#if 1
/*Keep the previous memory*/
for (i=0;i<st->lpcSize;i++)
mem[i]=st->mem_sp[i];
@@ -570,6 +655,7 @@ void sb_encode(SBEncState *st, float *in, FrameBits *bits)
/* Compute weighted signal again, from synthesized speech (not sure it's the right thing) */
residue_mem(sp, st->bw_lpc1, sw, st->subframeSize, st->lpcSize, mem);
syn_filt_mem(sw, st->bw_lpc2, sw, st->subframeSize, st->lpcSize, st->mem_sw);
+#endif
}

POP(st->stack);
@@ -33,6 +33,7 @@ typedef struct SBEncState {
int    nbSubframes;         /* Number of high-band sub-frames*/
int    windowSize;          /* Length of high-band LPC window*/
int    lpcSize;             /* Order of high-band LPC analysis */
+   int    bufSize;             /* Buffer size */
int    first;               /* First frame? */
float  lag_factor;          /* Lag-windowing control parameter */
float  lpc_floor;           /* Controls LPC analysis noise floor */
index 4258c36..156cbf3 100644 (file)
@@ -96,6 +96,9 @@ void encoder_init(EncState *st, SpeexMode *mode)
st->swBuf = calloc(st->bufSize,sizeof(float));
st->sw = st->swBuf + st->bufSize - st->windowSize;

+   st->exc2Buf = calloc(st->bufSize,sizeof(float));
+   st->exc2 = st->exc2Buf + st->bufSize - st->windowSize;
+
/* Hanning window */
st->window = malloc(st->windowSize*sizeof(float));
for (i=0;i<st->windowSize;i++)
@@ -141,6 +144,7 @@ void encoder_destroy(EncState *st)
free(st->excBuf);
free(st->swBuf);
free(st->os_filt);
+   free(st->exc2Buf);
free(st->stack);

free(st->window);
@@ -179,6 +183,7 @@ void encode(EncState *st, float *in, FrameBits *bits)
st->inBuf[st->bufSize-st->frameSize+i] = in[i] - st->preemph*in[i-1];
st->pre_mem = in[st->frameSize-1];

+   memmove(st->exc2Buf, st->exc2Buf+st->frameSize, (st->bufSize-st->frameSize)*sizeof(float));
memmove(st->excBuf, st->excBuf+st->frameSize, (st->bufSize-st->frameSize)*sizeof(float));
memmove(st->swBuf, st->swBuf+st->frameSize, (st->bufSize-st->frameSize)*sizeof(float));

@@ -237,8 +242,9 @@ void encode(EncState *st, float *in, FrameBits *bits)
{
float esig, enoise, snr, tmp;
int   offset;
-      float *sp, *sw, *res, *exc, *target, *mem;
-
+      float *sp, *sw, *res, *exc, *target, *mem, *exc2;
+      int pitch;
+
/* Offset relative to start of frame */
offset = st->subframeSize*sub;
/* Original signal */
@@ -247,6 +253,9 @@ void encode(EncState *st, float *in, FrameBits *bits)
exc=st->exc+offset;
/* Weighted signal */
sw=st->sw+offset;
+
+      exc2=st->exc2+offset;
+
/* Filter response */
res = PUSH(st->stack, st->subframeSize);
/* Target signal */
@@ -304,6 +313,8 @@ void encode(EncState *st, float *in, FrameBits *bits)
/* Reset excitation */
for (i=0;i<st->subframeSize;i++)
exc[i]=0;
+      for (i=0;i<st->subframeSize;i++)
+         exc2[i]=0;

/* Compute zero response of A(z/g1) / ( A(z/g2) * Aq(z) ) */
for (i=0;i<st->lpcSize;i++)
@@ -337,9 +348,9 @@ void encode(EncState *st, float *in, FrameBits *bits)

/* Long-term prediction */
#if 1
-      st->ltp_quant(target, st->interp_qlpc, st->bw_lpc1, st->bw_lpc2,
+      pitch = st->ltp_quant(target, st->interp_qlpc, st->bw_lpc1, st->bw_lpc2,
exc, st->ltp_params, st->min_pitch, st->max_pitch,
-                    st->lpcSize, st->subframeSize, bits, st->stack);
+                    st->lpcSize, st->subframeSize, bits, st->stack, exc2);
#else
{
float gain[3];
@@ -408,6 +419,25 @@ void encode(EncState *st, float *in, FrameBits *bits)
residue_mem(sp, st->bw_lpc1, sw, st->subframeSize, st->lpcSize, mem);
syn_filt_mem(sw, st->bw_lpc2, sw, st->subframeSize, st->lpcSize, st->mem_sw);

+#if 0
+      /*for (i=0;i<st->subframeSize;i++)
+        exc2[i]=.75*exc[i]+.2*exc[i-pitch]+.05*exc[i-2*pitch];*/
+      {
+         float max_exc=0;
+         for (i=0;i<st->subframeSize;i++)
+            if (fabs(exc[i])>max_exc)
+               max_exc=fabs(exc[i]);
+         max_exc=1/(max_exc+.01);
+         for (i=0;i<st->subframeSize;i++)
+         {
+            float xx=max_exc*exc[i];
+            exc2[i]=exc[i]*(1-exp(-100*xx*xx));
+         }
+      }
+#else
+      for (i=0;i<st->subframeSize;i++)
+         exc2[i]=exc[i];
+#endif
POP(st->stack);
POP(st->stack);
POP(st->stack);
index aa92284..50e66a9 100644 (file)
@@ -52,6 +52,8 @@ typedef struct EncState {
float *frame;          /* Start of original frame */
float *excBuf;         /* Excitation buffer */
float *exc;            /* Start of excitation frame */
+   float *exc2Buf;           /* "Pitch enhanced" excitation */
+   float *exc2;           /* "Pitch enhanced" excitation */
float *swBuf;          /* Weighted signal buffer */
float *sw;             /* Start of weighted signal frame */
float *window;         /* Temporary (Hanning) window */