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Add decay

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This commit is contained in:
Jean-Marc Valin 2022-02-02 03:54:05 -05:00
parent cd2e568bb6
commit d816477c58
2 changed files with 8 additions and 0 deletions
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7
dnn/lpcnet_plc.c
View file

@ -47,6 +47,7 @@ LPCNET_EXPORT void lpcnet_plc_init(LPCNetPLCState *st) {
st->pcm_fill = PLC_BUF_SIZE;
st->skip_analysis = 0;
st->blend = 0;
st->loss_count = 0;
}
LPCNET_EXPORT LPCNetPLCState *lpcnet_plc_create() {
@ -128,9 +129,11 @@ LPCNET_EXPORT int lpcnet_plc_update(LPCNetPLCState *st, short *pcm) {
RNN_MOVE(st->pcm, &st->pcm[FRAME_SIZE], PLC_BUF_SIZE);
}
RNN_COPY(st->features, st->enc.features[0], NB_TOTAL_FEATURES);
st->loss_count = 0;
return 0;
}
static const float att_table[10] = {0, 0, -.2, -.2, -.4, -.4, -.8, -.8, -1.6, -1.6};
LPCNET_EXPORT int lpcnet_plc_conceal(LPCNetPLCState *st, short *pcm) {
#if PLC_READ_FEATURES || PLC_DUMP_FEATURES
int i;
@ -163,6 +166,9 @@ LPCNET_EXPORT int lpcnet_plc_conceal(LPCNetPLCState *st, short *pcm) {
lpcnet_synthesize_tail_impl(&st->lpcnet, pcm, FRAME_SIZE-TRAINING_OFFSET, 0);
#if PLC_DNN_PRED
compute_plc_pred(&st->plc_net, st->features, zeros);
if (st->loss_count >= 10) st->features[0] = MAX16(-10, st->features[0]+att_table[9] - 2*(st->loss_count-9));
else st->features[0] = MAX16(-10, st->features[0]+att_table[st->loss_count]);
if (st->loss_count > 4) st->features[NB_FEATURES-1] = MAX16(-.5, st->features[NB_FEATURES-1]-.1*(st->loss_count-4));
#endif
#if PLC_READ_FEATURES
for (i=0;i<NB_FEATURES;i++) scanf("%f", &st->features[i]);
@ -181,6 +187,7 @@ LPCNET_EXPORT int lpcnet_plc_conceal(LPCNetPLCState *st, short *pcm) {
compute_frame_features(&st->enc, x);
process_single_frame(&st->enc, NULL);
}
st->loss_count++;
st->blend = 1;
return 0;
}

1
dnn/lpcnet_private.h
View file

@ -75,6 +75,7 @@ struct LPCNetPLCState {
int skip_analysis;
int blend;
float features[NB_TOTAL_FEATURES];
int loss_count;
PLCNetState plc_net;
};