diff options
| author | Jean-Marc Valin <jmvalin@amazon.com> | 2022-02-16 08:58:40 +0300 |
|---|---|---|
| committer | Jean-Marc Valin <jmvalin@amazon.com> | 2022-02-16 08:58:40 +0300 |
| commit | d1a14ac5d4343bce71640d1e05595df9ffafa103 (patch) | |
| tree | 0b557be6946b346f8e1ac4f6a409d7cfe8105314 /dnn/lpcnet.c | |
| parent | 2a8bcf4c0f816e76b0093bbedb15389531a35c23 (diff) | |
Making state update more robust to discontinuities
Diffstat (limited to 'dnn/lpcnet.c')
| -rw-r--r-- | dnn/lpcnet.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/dnn/lpcnet.c b/dnn/lpcnet.c index 48dca42d..5a39f924 100644 --- a/dnn/lpcnet.c +++ b/dnn/lpcnet.c @@ -192,8 +192,12 @@ void lpcnet_synthesize_tail_impl(LPCNetState *lpcnet, short *output, int N, int last_sig_ulaw = lin2ulaw(lpcnet->last_sig[0]); pred_ulaw = lin2ulaw(pred); exc = run_sample_network(&lpcnet->nnet, lpcnet->gru_a_condition, lpcnet->gru_b_condition, lpcnet->last_exc, last_sig_ulaw, pred_ulaw, lpcnet->sampling_logit_table, &lpcnet->rng); - if (i < preload) exc = lin2ulaw(output[i]-PREEMPH*lpcnet->deemph_mem - pred); - pcm = pred + ulaw2lin(exc); + if (i < preload) { + exc = lin2ulaw(output[i]-PREEMPH*lpcnet->deemph_mem - pred); + pcm = output[i]-PREEMPH*lpcnet->deemph_mem; + } else { + pcm = pred + ulaw2lin(exc); + } RNN_MOVE(&lpcnet->last_sig[1], &lpcnet->last_sig[0], LPC_ORDER-1); lpcnet->last_sig[0] = pcm; lpcnet->last_exc = exc; @@ -201,7 +205,7 @@ void lpcnet_synthesize_tail_impl(LPCNetState *lpcnet, short *output, int N, int lpcnet->deemph_mem = pcm; if (pcm<-32767) pcm = -32767; if (pcm>32767) pcm = 32767; - output[i] = (int)floor(.5 + pcm); + if (i >= preload) output[i] = (int)floor(.5 + pcm); } } |