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cvsd: fix scaling factor to max of 1 instead of 1.2

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This commit is contained in:
Milanka Ringwald 2018-12-04 22:16:30 +01:00
parent 21045273fa
commit cf8890c436
2 changed files with 9 additions and 7 deletions
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11
src/classic/btstack_cvsd_plc.c
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@ -126,7 +126,7 @@ static float AmplitudeMatch(btstack_cvsd_plc_state_t *plc_state, SAMPLE_FORMAT *
sf = sumx/sumy;
// This is not in the paper, but limit the scaling factor to something reasonable to avoid creating artifacts
if (sf<0.75f) sf=0.75f;
if (sf>1.2f) sf=1.2f;
if (sf>1.0) sf=1.0f;
return sf;
}
@ -146,7 +146,7 @@ void btstack_cvsd_plc_bad_frame(btstack_cvsd_plc_state_t *plc_state, SAMPLE_FORM
int i = 0;
float sf = 1;
plc_state->nbf++;
// plc_state->cvsd_fs = CVSD_FS_MAX;
if (plc_state->nbf==1){
// Perform pattern matching to find where to replicate
plc_state->bestlag = PatternMatch(plc_state->hist);
@ -180,12 +180,13 @@ void btstack_cvsd_plc_bad_frame(btstack_cvsd_plc_state_t *plc_state, SAMPLE_FORM
plc_state->hist[CVSD_LHIST+i] = plc_state->hist[plc_state->bestlag+i];
}
}
for (i=0;i<plc_state->cvsd_fs;i++){
out[i] = plc_state->hist[CVSD_LHIST+i];
}
// shift the history buffer
for (i=0;i<CVSD_LHIST+CVSD_RT+CVSD_OLAL;i++){
// shift the history buffer
for (i=0;i<CVSD_LHIST+CVSD_RT+CVSD_OLAL;i++){
plc_state->hist[i] = plc_state->hist[i+plc_state->cvsd_fs];
}
}

5
src/classic/btstack_cvsd_plc.h
View File

@ -49,12 +49,13 @@
extern "C" {
#endif
#define CVSD_FS_MAX 60 /* CVSD Frame Size */
#define CVSD_N 128 /* 16ms - Window Length for pattern matching */
#define CVSD_N 256 /* Window Length for pattern matching */
#define CVSD_M 10 /* Template for matching */
#define CVSD_LHIST (CVSD_N+CVSD_FS_MAX-1) /* Length of history buffer required */
#define CVSD_RT 5 /* Reconvergence Time (samples) */
#define CVSD_OLAL 16 /* OverLap-Add Length (samples) */
#define CVSD_OLAL 16 /* OverLap-Add Length (samples) */
/* PLC State Information */
typedef struct cvsd_plc_state {