author jmvalin Thu, 16 May 2002 19:16:33 +0000 (19:16 +0000) committer jmvalin Thu, 16 May 2002 19:16:33 +0000 (19:16 +0000)
re-trained.

git-svn-id: http://svn.xiph.org/trunk/speex@3308 0101bb08-14d6-0310-b084-bc0e0c8e3800

 README patch | blob | history libspeex/hexc_table.c patch | blob | history libspeex/ltp.c patch | blob | history libspeex/nb_celp.c patch | blob | history libspeex/sb_celp.c patch | blob | history

index b7578b0..73b4f2c 100644 (file)
@@ -7,8 +7,26 @@ IP (VoIP). In some sense, it is meant to be complementary to the Ogg
Vorbis codec.

Although we aim at providing a patent-free codec, we strongly suggest you
-have a look at patent issues if you are thinking of using Speex
-commercially. The speech coding field is a real patent mine field and
+have a look at patent issues if you are thinking about using Speex
+commercially. The speech coding field is a real patent minefield and
the scope and enforceability of all these patents is sometimes unclear,
not to mention that each country has different laws.

+To use Speex:
+
+% speexenc [-n or -w] input_file.sw compressed_file.spx
+
+% speexdec compressed_file.spx output_file.sw
+
+where -n is for narrowband (8 kHz sampling) and -w is wideband (16 kHz
+sampling).
+
+All audio files are assumed to be raw (no header) 16-bit PCM files. To
+convert a .wav file into this format:
+% sox my_file.wav -t sw my_file.sw
+
+Note that if the original sampling frequency of the wav is not 8 kHz or 16 kHz,
+you will need to add "-r 8000" or "-r 16000" (without the quotes).
+
+To create a .wav file:
+% sox -t sw my_file.sw my_file.wav
index 8459eea..e405384 100644 (file)
-float hexc_table[256][8]={{0.00596334,0.961802,-1.17836,-3.01893,0.498393,-1.77481,0.933678,0.707556},
-{-1.09273,0.779159,3.35175,8.96719,9.20773,-5.48121,-10.3742,-6.00719},
-{-6.63724,-0.431913,1.22604,4.36403,0.315399,-1.74806,1.18705,1.3023},
-{-0.34432,-0.291574,-0.676932,-0.693059,-0.7169,-0.664636,-0.479618,-0.499353},
-{-0.289628,-0.69633,-0.420114,-0.550872,-0.194063,0.406592,0.129426,0.638474},
-{1.55285,5.18598,-4.07314,-0.57972,1.41307,-3.34088,-1.75373,0.836238},
-{9.64848,5.49757,2.71352,-0.774738,-5.77379,-11.3207,-6.64266,8.36487},
-{5.35712,2.3447,0.611676,-3.20016,-0.573763,-0.633532,-3.71085,-0.11144},
-{1.55562,-3.0477,-0.443413,-2.66988,1.62136,1.25092,-0.598591,1.3126},
-{0.107545,-0.229729,2.97792,-0.0144502,-0.467264,-1.0848,0.459428,-1.23135},
-{-1.31507,-1.83314,-1.68476,0.838043,1.36763,1.84906,1.59447,-0.581666},
-{-1.84137,-1.61001,0.212489,-1.57008,1.15597,-0.186575,0.104659,0.534858},
-{1.3404,-2.36834,0.652265,0.144586,1.38806,0.0279121,0.0943678,-1.38542},
-{1.80025,1.93867,2.00891,0.685305,0.462605,-9.82099,-1.43226,-1.02076},
-{1.06998,0.460049,1.99375,-3.45493,-2.93745,1.12063,0.883749,0.0620846},
-{-0.421529,1.10504,-7.0891,-0.115913,3.5515,0.749357,2.06642,0.302182},
-{-4.9891,-4.97802,3.03304,-0.545989,-5.1588,1.47589,4.97565,1.61485},
-{10.6517,6.05228,7.04337,5.2549,4.60269,4.3744,1.75997,0.923521},
-{-7.65203,5.27239,-4.24031,-1.84605,2.09177,0.721852,1.14006,2.23425},
-{-0.767754,0.334586,0.809721,0.580797,-0.480078,-0.629865,-0.0528265,0.211446},
-{-0.579945,-1.66864,5.09098,-0.45305,3.4849,2.62679,-3.21053,-2.14739},
-{0.240911,12.8432,-8.82027,-1.6974,-6.1177,-8.82078,3.68925,-0.0674868},
-{1.85091,-0.942606,0.473398,-0.591,-1.94523,1.96216,-2.48735,-0.454837},
-{5.09157,-9.95944,1.32533,7.88265,1.75663,-1.93783,-1.24923,-0.293239},
-{-1.22145,-5.98452,3.7634,-0.705553,3.38743,-0.413326,-1.65825,2.90272},
-{1.2211,-1.75124,3.31627,1.23058,-3.09041,1.4764,0.354087,-0.887407},
-{2.51455,-1.35068,-1.29518,2.8944,-2.37898,1.2081,1.24154,-3.28068},
-{-0.319508,-0.252012,-0.133097,-0.305965,-0.562591,-0.759897,2.05952,0.299892},
-{-0.800117,0.0891911,0.299706,2.16995,3.36063,-0.111935,-0.646773,-3.46147},
-{3.00977,1.33377,8.45317,-3.46033,4.25616,-6.27074,-6.8382,-0.565441},
-{-1.11805,-0.977105,0.09164,6.71365,1.30803,10.4462,-9.19217,-8.67702},
-{3.54213,6.58884,-3.49584,1.99994,-8.29993,0.640732,-2.04007,-1.86263},
-{0.994519,0.128403,-1.17005,1.30192,-5.75131,-5.0784,8.31152,-2.85104},
-{-1.60038,5.54056,1.85563,6.81351,-2.48191,0.468508,-1.57252,-2.08778},
-{-0.971087,-3.78474,-3.88213,-3.01418,-4.89943,-3.35667,-1.89404,-2.25134},
-{2.18713,0.162262,-0.794402,-0.894054,0.301279,-0.367108,-0.16506,-0.325218},
-{3.54902,-1.02119,-2.61702,-0.433606,4.35146,-0.148326,-3.46654,2.14477},
-{3.56186,4.39716,-12.5599,-4.90088,1.10731,3.61826,1.3884,2.58328},
-{1.7457,0.499283,-1.11856,-3.02534,-9.0291,1.82454,2.67053,4.79438},
-{6.33564,1.3493,-2.90245,4.9839,-2.07942,-2.99799,-1.37353,0.194392},
-{0.59306,-0.667111,-1.63125,-1.94958,-0.273168,1.86502,2.00237,0.635809},
-{0.162288,0.0477809,0.397164,-0.0260089,0.0535681,-0.783583,-1.75111,-1.94167},
-{0.911535,-4.70564,-2.89805,-2.72332,8.24786,5.59401,-1.56173,-1.95495},
-{0.517353,-0.525953,-3.41303,3.64218,-0.911369,1.06019,-1.16563,1.05369},
-{-0.161767,-0.0456504,0.418959,0.160653,0.480297,-0.206741,0.636733,-1.81423},
-{-0.11519,-0.0362332,-1.05077,0.102514,-0.021697,-6.09927,1.80389,5.41577},
-{0.0991684,-0.682428,0.259715,-0.134647,0.416149,1.29069,-0.370203,-0.775089},
-{-4.50775,-0.00100952,-4.76029,4.93879,3.12663,1.40609,-2.15292,1.06787},
-{-2.78658,-2.41158,-1.97123,0.482207,2.33509,-3.01037,8.20183,0.841873},
-{0.287164,1.86315,7.77262,11.2794,-12.9211,-7.09667,-1.35359,-6.19793},
-{-6.79787,-1.34923,6.98219,0.0379624,-1.31655,-0.496518,-0.84944,1.89517},
-{0.245815,-1.10537,0.826552,0.0871601,-0.368666,-0.238575,-0.318147,0.0367272},
-{-4.26892,-1.14217,-1.47639,-6.52443,6.09884,1.01617,-1.62314,7.8186},
-{1.54392,5.37571,0.977919,-0.847368,-2.70392,-1.01109,-0.922396,-1.28249},
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-{5.69122,-0.488377,-1.46671,0.681471,0.868299,1.68511,0.838676,-0.825714},
-{-2.31738,-2.1621,0.522756,0.900326,-0.470159,1.05873,-1.0559,-0.210936},
-{-0.459554,-1.06285,0.573956,1.98694,-0.65771,-1.34037,-0.0553681,1.62538},
-{-2.72696,-1.52834,-0.593637,5.75016,-3.12266,4.86092,0.413699,0.359828},
-{0.0808353,0.193152,0.0389671,0.175378,-0.211664,0.327569,-1.21192,0.0455147},
-{-0.882134,-1.33219,-1.5698,-0.629834,6.19642,0.60124,4.43049,-4.09649},
-{3.84539,-0.45681,1.76585,0.421058,0.929836,-1.3123,0.0920509,-0.565889},
-{0.204747,2.37451,-0.0402808,1.797,-2.46898,-1.09955,-5.20885,1.3839},
-{-0.189646,1.62857,-0.833329,-0.0364312,-2.83753,0.378956,0.39833,0.980087},
-{1.40852,1.19171,2.7495,-5.64983,1.96283,-3.27398,0.199364,1.38964},
-{-1.09869,1.3949,0.759887,0.687602,-1.42357,-2.77522,-3.61392,-4.87194},
-{-8.17908,-2.77667,-0.327769,-0.23556,4.90227,2.59569,-0.200477,-0.707252},
-{-1.7181,-1.89374,-1.89098,-2.34294,-1.41945,-1.285,-0.821974,0.250006},
-{0.57952,-2.18138,-1.63374,0.37941,0.450371,-0.115038,0.438043,0.546956},
-{0.0783844,2.43611,-1.9918,-0.547415,0.366085,-0.915101,0.498379,-0.843595},
-{-0.388358,1.27791,-1.16751,0.609873,-5.74965,2.55315,-10.591,14.4464},
-{6.1754,3.11497,1.50675,-5.21698,-0.804491,-1.65617,2.34825,-2.34182},
-{-1.98947,-2.5542,-0.827056,-2.67255,2.4294,1.31308,3.25936,1.28217},
-{2.0815,2.90298,1.029,-0.162884,1.25637,0.52683,0.122897,-0.25819},
-{-1.36184,-4.72108,-6.19039,0.875934,2.2871,3.55011,3.12527,1.12481},
-{-4.24993,1.57179,-0.643034,0.0488152,-0.855254,0.319326,-0.670514,1.94472},
-{0.392787,-0.572109,0.330958,-0.574133,0.489689,-0.233161,0.539798,-0.153841},
-{-0.151992,1.05461,1.59571,-1.14266,-0.775412,-4.78044,1.85783,-0.375044},
-{-1.37613,-1.17214,1.15579,-2.18811,0.0144438,3.36288,-0.559745,0.266116},
-{-1.90271,0.133615,-3.72728,5.39488,0.389955,-1.14554,2.92875,-1.07409},
-{-1.13268,-1.16504,-0.803357,-1.26185,-0.995426,2.98762,11.6034,-1.55409},
-{1.58461,3.43271,3.15758,3.61008,4.19841,2.95134,2.02262,1.21991},
-{-3.16395,1.76306,2.06703,1.88901,0.179146,1.37067,-1.19422,-0.984654},
-{0.0414621,-0.00391642,-0.0213088,-0.0476843,-0.0975031,0.017092,-0.014006,-0.00491766},
-{-1.2966,-3.69977,-0.196889,-1.74452,10.1355,-1.55321,1.81829,0.659723},
-{0.378435,13.6983,2.15336,-3.18556,-0.798485,0.863881,-0.15097,-0.732861},
-{-0.855569,0.24939,3.83951,-1.22131,-3.45346,0.658904,-3.41821,1.70097},
-{3.33813,-3.7548,-2.07261,-2.04664,0.0186421,-1.50429,1.8991,0.258947},
-{-1.4418,-3.00819,0.541237,4.31623,3.25692,1.92429,-0.401486,0.123254},
-{-2.61994,-3.4407,6.94121,2.97651,-0.864004,0.612121,1.20001,-3.97684},
-{-1.01072,-1.01778,-1.46718,0.962642,0.139496,6.4504,0.58795,-2.77344},
-{0.0683276,0.242321,-0.332268,-0.167348,0.0588223,-0.561949,0.0128769,0.692257},
-{-3.70373,3.53353,1.36103,-1.28587,4.6419,5.95083,0.463164,-4.46743},
-{4.73618,-2.4861,2.62966,-7.29803,-4.98566,-2.26953,-2.30375,3.06739},
-{-0.494718,0.718938,-0.304026,1.24893,-0.278192,4.10163,-6.95281,2.14885},
-{-0.472974,3.22649,-6.07153,1.07686,-3.75601,-1.10709,3.21006,0.312003},
-{0.170852,-0.556819,-5.61366,-10.0139,-5.71126,-2.51742,13.3491,11.8559},
-{-0.594016,1.23359,0.0658363,3.54037,-0.155034,-1.52533,0.0236745,-1.75594},
-{-15.9805,-7.17243,-13.2139,-10.7127,-7.74589,-7.88822,-2.35093,-1.36059},
-{-0.839397,-5.89704e-05,1.0169,-0.124808,-1.23702,1.07154,0.112274,-0.437035},
-{-0.498523,1.84575,-1.76887,-0.467115,2.6392,-0.207664,-1.27903,0.778147},
-{-0.894377,2.73574,-1.91608,-3.84077,0.645348,1.09503,0.102773,2.86183},
-{-1.16055,-3.20939,-3.60614,-8.21962,3.97539,12.4943,2.7547,10.0854},
-{15.0031,9.64887,-13.4129,3.18632,6.62155,0.941796,-8.23323,-8.32332},
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-{0.203788,1.75743,-0.0272479,0.617584,0.391623,0.884434,-2.73177,-1.05421},
-{1.26367,-12.8384,-1.06154,-1.10927,-0.234052,4.10143,3.1193,2.77169},
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-{-1.75066,3.07852,2.09557,-1.43375,1.54424,-0.999114,0.849652,-3.49942},
-{0.651646,-0.608241,0.548973,-0.48609,1.13023,-1.09611,-1.04516,1.27515},
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-{0.512416,-2.74434,0.546467,2.83784,-0.533482,-0.817829,1.83944,-0.731159},
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-{-1.14276,1.48479,2.45777,2.07843,-3.71661,-0.741793,2.22734,-1.37552},
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-{1.29544,-0.998222,1.64711,-2.71804,0.37388,-0.777328,0.648924,-0.758115},
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-{0.22472,0.14646,-1.11336,-0.331597,0.982495,0.27725,-0.0547889,-0.0909637},
-{-1.69001,5.3349,-0.366215,2.32444,0.676152,-1.63652,-0.496699,0.990876},
-{-1.01343,2.02632,3.75093,-1.48647,-5.80882,-8.40272,-2.27878,10.2562},
-{3.8378,2.05113,-2.59689,-2.39786,-2.69032,0.0530386,0.26899,0.972373},
-{0.49211,0.0821152,-1.2347,-2.92653,2.16986,1.5811,0.59131,-1.51669},
-{0.467823,0.150847,1.88578,1.80124,0.0210955,0.103743,-1.30309,-0.624813},
-{-3.24128,0.153595,0.394586,1.34867,2.18227,2.90401,2.97036,1.87611},
-{-1.85919,0.571944,-0.334621,-0.769427,0.31506,0.493431,0.441428,0.315109},
-{-0.271593,-0.470292,0.489023,-0.56287,2.15425,-0.313037,2.40481,-0.930909},
-{1.0053,1.67489,1.8417,5.49286,2.59641,-9.01027,1.00317,-7.85156},
-{0.192674,1.23763,-0.2898,-0.821004,-1.89117,1.01075,1.95767,-2.19794},
-{2.12767,-0.14419,-4.98615,-0.415483,-0.621716,-1.12736,1.07307,2.17722},
-{-10.0525,-1.37945,12.0511,-8.52086,-12.1122,4.01575,7.7583,4.85601},
-{17.7165,16.2218,15.2097,16.8817,18.1844,16.7123,12.2521,9.76576},
-{-6.85617,7.56277,-3.45185,6.8115,4.55666,-1.9991,1.78707,-1.73036},
-{-0.499327,-0.0698337,-0.0373869,0.200028,0.329592,-0.0486077,0.0663931,-0.219115},
-{-2.27881,-2.05002,2.67206,1.03504,1.92792,0.121717,0.562062,-0.835895},
-{0.99975,11.1524,1.06566,1.68586,-0.504727,-5.86336,-3.12448,-4.47146},
-{0.285341,0.755941,0.0583213,2.3038,-2.79715,0.933629,-1.48385,0.0677943},
-{7.66993,-10.4982,-9.97698,6.17148,0.167368,-2.61863,-2.28408,4.39419},
-{-8.53897,-13.7514,0.266647,4.65467,3.68827,-4.83792,5.20001,10.7581},
-{1.03452,-3.55737,2.1642,1.52748,-0.342402,2.28709,-1.64957,1.22567},
-{-1.0491,1.7385,1.34901,0.655908,-6.00214,5.13727,1.03022,-4.067},
-{1.47236,0.335302,-0.69815,1.23935,1.03984,0.212929,1.88324,1.36407},
-{1.59779,0.719427,-4.42698,2.39738,5.85166,1.55233,-1.7612,-6.04771},
-{-2.0815,3.45684,10.8921,-8.82219,4.29542,1.09212,-2.85653,0.495975},
-{-1.04604,3.60327,2.37328,2.24126,4.81999,5.53379,-13.2484,-1.413},
-{0.488281,2.15665,0.747949,1.81346,-7.05606,-1.65903,0.150788,2.36166},
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+{0.808921,0.354669,0.392377,0.671615,-0.803726,-1.28414,-0.556139,0.0837814},
+{0.835236,0.620821,0.717716,-0.0309147,-0.223465,0.124068,0.667246,1.04023},
+{-0.0521935,0.618173,0.241935,-2.14632,1.49656,-0.491607,0.372421,-0.678658},
+{-0.40883,0.823298,-1.92246,-0.388639,1.55592,0.392341,-1.13516,0.595127},
+{-0.958854,2.3407,1.30073,-0.280573,0.911012,-1.05048,-0.513848,-0.546581},
+{-0.17029,-0.09665,-0.684148,0.150044,-2.35408,1.49623,2.21859,-0.0558014},
+{-1.19796,-0.719742,-0.263796,-0.494669,-0.723702,-0.821728,-0.638013,-0.151613},
+{0.410444,-1.75187,0.966378,-0.396605,-0.975379,0.0302732,1.08905,0.168156},
+{0.195242,0.309484,1.07001,0.591054,-0.535163,-3.19281,0.13333,0.269121}};
@@ -519,6 +519,7 @@ float *exc2
}
}

+   /*printf ("pitch: %d %d\n", best_pitch, best_gain_index);*/
speex_bits_pack(bits, best_pitch-start, params->pitch_bits);
speex_bits_pack(bits, best_gain_index, params->gain_bits);
/*printf ("encode pitch: %d %d\n", best_pitch, best_gain_index);*/
index 2d7bc42..4f54e06 100644 (file)
@@ -429,7 +429,7 @@ void nb_encode(void *state, float *in, FrameBits *bits)
ener=sign/sqrt(.01+ener/st->subframeSize);
for (i=0;i<st->subframeSize;i++)
{
-            if (i%8==0)
+            if (i%4==0)
printf ("\nexc ");
printf ("%f ", ener*st->buf2[i]);
}
@@ -441,7 +441,7 @@ void nb_encode(void *state, float *in, FrameBits *bits)
#else
if (0)
{
-      /* Perform a split-codebook search */
+      /* Perform innovation search */
st->innovation_quant(target, st->interp_qlpc, st->bw_lpc1, st->bw_lpc2,
st->innovation_params, st->lpcSize,
st->subframeSize, exc, bits, st->stack);
@@ -468,7 +468,6 @@ void nb_encode(void *state, float *in, FrameBits *bits)
qe=63;
ener = exp(qe/7.0);
speex_bits_pack(bits, qe, 6);
-            /*printf ("quant_energy: %d %f\n", qe, ener);*/
}
ener_1 = 1/ener;

index ab9e3b9..d6fa747 100644 (file)
@@ -393,7 +393,7 @@ void sb_encode(void *state, float *in, FrameBits *bits)
{
float *exc, *sp, *mem, *res, *target, *sw, tmp, filter_ratio;
int offset;
-      float rl, rh;
+      float rl, rh, eh=0, el=0;
int fold;

offset = st->subframeSize*sub;
@@ -443,18 +443,19 @@ void sb_encode(void *state, float *in, FrameBits *bits)
/*printf ("filter_ratio %f\n", filter_ratio);*/
fold=0;

+      /* Compute "real excitation" */
+      residue_mem(sp, st->interp_qlpc, exc, st->subframeSize, st->lpcSize, st->mem_sp2);
+      /* 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(((EncState*)st->st_low)->exc[offset+i]);
+
if (fold) {/* 1 for spectral folding excitation, 0 for stochastic */
-         float el=0,eh=0,g;
+         float g;
/*speex_bits_pack(bits, 1, 1);*/
-         /* Compute "real excitation" */
-         residue_mem(sp, st->interp_qlpc, exc, st->subframeSize, st->lpcSize, st->mem_sp2);

#if 1
-         /* 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(((EncState*)st->st_low)->exc[offset+i]);
/* Gain to use if we want to use the low-band excitation for high-band */
g=eh/(.01+el);
g=sqrt(g);
@@ -484,17 +485,40 @@ void sb_encode(void *state, float *in, FrameBits *bits)
/* FIXME: Update perceptually weighted signal in case we switch to the
other mode */
} else {
-         float el=0;
-         float gc;
+         float gc, scale, scale_1;
float *innov;

/*speex_bits_pack(bits, 0, 1);*/
innov = PUSH(st->stack, st->subframeSize);

-         for (i=0;i<st->subframeSize;i++)
-            el+=sqr(((EncState*)st->st_low)->exc[offset+i]);

-         gc = (.01+filter_ratio)/(1+sqrt(el/st->subframeSize));
+         gc = sqrt(1+eh)*filter_ratio/sqrt((1+el)*st->subframeSize);
+
+         {
+            int qgc = (int)floor(.5+3.7*(log(gc)+2));
+            if (qgc<0)
+               qgc=0;
+            if (qgc>15)
+               qgc=15;
+            speex_bits_pack(bits, qgc, 4);
+            gc = exp((1/3.7)*qgc-2);
+         }
+
+         scale = gc*sqrt(1+el)/filter_ratio;
+         scale_1 = 1/scale;
+         if (0 && rand()%5==0)
+         {
+            float sc = 1/sqrt(.1+eh/st->subframeSize);
+            if (rand()&1)
+               sc=-sc;
+            for (i=0;i<st->subframeSize;i++)
+            {
+               float tmp=exc[i]*sc;
+               if (i%8==0)
+                  printf ("\nhexc");
+               printf (" %f", tmp);
+            }
+         }

/* Reset excitation */
for (i=0;i<st->subframeSize;i++)
@@ -528,7 +552,7 @@ void sb_encode(void *state, float *in, FrameBits *bits)

for (i=0;i<st->subframeSize;i++)
-            target[i]*=gc;
+            target[i]*=scale_1;

/* Reset excitation */
for (i=0;i<st->subframeSize;i++)
@@ -541,7 +565,7 @@ void sb_encode(void *state, float *in, FrameBits *bits)
/*print_vec(target, st->subframeSize, "after");*/

for (i=0;i<st->subframeSize;i++)
-            exc[i] += innov[i]/gc;
+            exc[i] += innov[i]*scale;

POP(st->stack);
}
@@ -763,10 +787,18 @@ void sb_decode(void *state, FrameBits *bits, float *out)
for (i=0;i<st->subframeSize;i++)
exc[i]=g*((DecState*)st->st_low)->exc[offset+i];
} else {
+         float gc, scale;
+         int qgc = speex_bits_unpack_unsigned(bits, 4);
+
+         gc = exp((1/3.7)*qgc-2);
+
+         scale = gc*sqrt(1+el)/filter_ratio;
+
+
st->innovation_unquant(exc, st->innovation_params, st->subframeSize,
bits, st->stack);
for (i=0;i<st->subframeSize;i++)
-            exc[i]*=gain;
+            exc[i]*=scale;
}
syn_filt_mem(exc, st->interp_qlpc, sp, st->subframeSize, st->lpcSize, st->mem_sp);