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| author | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2016-05-31 17:54:20 -0400 |
|---|---|---|
| committer | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2016-06-29 15:21:31 -0400 |
| commit | 50a79d6075b163d52ee93c0e37b595da8d8107a1 (patch) | |
| tree | 0776ace8257a752ea5f7ab42c25b3b5fe9889a17 | |
| parent | 07e5b764408a836f7a5a4efdd39ea0b3e4eae10c (diff) | |
| download | opus-50a79d6075b163d52ee93c0e37b595da8d8107a1.tar.gz | |
Boosting the high-band bitrate on transients for hybrid mode
| -rw-r--r-- | celt/celt_encoder.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/celt/celt_encoder.c b/celt/celt_encoder.c index 544b7bc3..7c949ccb 100644 --- a/celt/celt_encoder.c +++ b/celt/celt_encoder.c @@ -1939,10 +1939,13 @@ int celt_encode_with_ec(CELTEncoder * OPUS_RESTRICT st, const opus_val16 * pcm, /* Tonal frames (offset<100) need more bits than noisy (offset>100) ones. */ if (st->silk_info.offset < 100) target += 12 << BITRES >> (3-LM); if (st->silk_info.offset > 100) target -= 18 << BITRES >> (3-LM); + /* Boosting bitrate on transients and vowels with significant temporal + spikes. */ + target += MULT16_16_Q14(tf_estimate-QCONST16(.25f,14), (50<<BITRES)); /* If we have a strong transient, let's make sure it has enough bits to code the first two bands, so that it can use folding rather than noise. */ if (tf_estimate > QCONST16(.7f,14)) - target = IMAX(base_target, 50<<BITRES); + target = IMAX(target, 50<<BITRES); } /* The current offset is removed from the target and the space used so far is added*/ |