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Tuning the speech/music probability model

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This commit is contained in:
Jean-Marc Valin 2012-10-09 02:12:02 -04:00
parent 9a16e7f944
commit 317ffc203e
1 changed files with 3 additions and 4 deletions
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7
src/analysis.c
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@ -409,10 +409,9 @@ void tonality_analysis(TonalityAnalysisState *tonal, AnalysisInfo *info, CELTEnc
#ifndef FIXED_POINT
mlp_process(&net, features, &frame_prob);
/* Adds a "probability dead zone", with a cap on certainty */
frame_prob = .90*frame_prob*frame_prob*frame_prob;
frame_prob = .5*(frame_prob+1);
/* Curve fitting between the MLP probability and the actual probability */
frame_prob = .01 + 1.21*frame_prob*frame_prob - .23*pow(frame_prob, 10);
/*printf("%f\n", frame_prob);*/
{
@ -422,7 +421,7 @@ void tonality_analysis(TonalityAnalysisState *tonal, AnalysisInfo *info, CELTEnc
/* One transition every 3 minutes */
tau = .00005;
beta = .1;
max_certainty = 1.f/(10+1*tonal->last_transition);
max_certainty = .01+1.f/(20+.5*tonal->last_transition);
p0 = (1-tonal->music_prob)*(1-tau) + tonal->music_prob *tau;
p1 = tonal->music_prob *(1-tau) + (1-tonal->music_prob)*tau;
p0 *= pow(1-frame_prob, beta);