shithub: opus

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noise tuning, flip sign of speech signal

--- a/dnn/dump_data.c

+++ b/dnn/dump_data.c

@@ -244,6 +244,7 @@

     if (training && ++gain_change_count > 2821) {

       float tmp, tmp2;

       speech_gain = pow(10., (-20+(rand()%40))/20.);

+      if (rand()&1) speech_gain = -speech_gain;

       if (rand()%20==0) speech_gain *= .01;

       if (rand()%100==0) speech_gain = 0;

       gain_change_count = 0;

@@ -250,7 +251,7 @@

       rand_resp(a_sig, b_sig);

       tmp = (float)rand()/RAND_MAX;

       tmp2 = (float)rand()/RAND_MAX;

-      noise_std = -log(tmp)-log(tmp2);

+      noise_std = ABS16(-1.5*log(1e-4+tmp)-.5*log(1e-4+tmp2));

     }

     biquad(x, mem_hp_x, x, b_hp, a_hp, FRAME_SIZE);

     biquad(x, mem_resp_x, x, b_sig, a_sig, FRAME_SIZE);

--- a/dnn/lpcnet_private.h

+++ b/dnn/lpcnet_private.h

@@ -1,6 +1,7 @@

 #ifndef LPCNET_PRIVATE_H

 #define LPCNET_PRIVATE_H

+#include <stdio.h>

 #include "common.h"

 #include "freq.h"

 #include "lpcnet.h"

@@ -73,5 +74,7 @@

 void compute_frame_features(LPCNetEncState *st, const float *in);

 void decode_packet(float features[4][NB_TOTAL_FEATURES], float *vq_mem, const unsigned char buf[8]);

+

+void process_single_frame(LPCNetEncState *st, FILE *ffeat);

 #endif

-- 

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