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187 commits

Author SHA1 Message Date
Jean-Marc Valin
9b4ed5e290 Implementing intensity stereo. 
There's no explicit signaling for it yet.
 2010-11-24 18:01:20 -05:00
Jean-Marc Valin
3295b5d56b Folding code moved to quant_band() to prevent duplication. 2010-10-15 23:43:45 -04:00
Jean-Marc Valin
c4711e4e11 More VQ search simplifications 2010-10-15 23:31:06 -04:00
Jean-Marc Valin
bbc010c4f3 Removing yshift from the fixed-point VQ search 2010-10-15 22:55:35 -04:00
Jean-Marc Valin
3d25e71b40 More simplifications to the VQ search 2010-10-15 22:45:02 -04:00
Jean-Marc Valin
aca7a63040 VQ search no longer needs to put more than one pulse at a time 2010-10-15 22:06:36 -04:00
Jean-Marc Valin
ccd51fe947 No longer filling the stereo side with noise. 2010-10-13 11:48:17 -04:00
Jean-Marc Valin
009978ee6c Moves the bit-side gain application to the quantizer 2010-09-13 11:05:08 -04:00
Jean-Marc Valin
eea914cb88 Simplifies vector renormalisation (and using it less) 2010-09-12 20:11:32 -04:00
Jean-Marc Valin
736efd6909 Fixes some MSVC warnings 2010-08-31 11:52:45 -04:00
Jean-Marc Valin
d38d6b9aa1 Implemented variable spreading amount in the decoder 
Decision not yet implemented in the encoder
 2010-08-07 09:21:32 -04:00
Timothy B. Terriberry
828da91d66 Minor simplification to exp_rotation(). 2010-08-06 21:43:49 -04:00
Jean-Marc Valin
39ffbeec9a Comments 2010-08-06 07:40:11 -04:00
Jean-Marc Valin
6f1cbca519 More cleanup 2010-07-24 22:06:29 -04:00
Jean-Marc Valin
f276b23415 Using random noise in upper bands when signal is "normal" 2010-07-24 17:13:17 -04:00
Jean-Marc Valin
ea245c5ca9 Fixed C99-style declaration 2010-07-06 20:25:54 -04:00
Jean-Marc Valin
67217ee746 Splitting transients in time domain 2010-05-21 13:58:51 -04:00
Jean-Marc Valin
2123f358b1 Cleaning up the folding code. 
Folding now moved to alg_quant() and alg_unquant(). No more funny short block
alignment checks because bands now have to be aligned.
 2010-05-09 19:45:31 -04:00
Jean-Marc Valin
65ee67ac55 Making the band definition the same at all frame sizes. 2010-04-26 07:08:44 -04:00
Jean-Marc Valin
8271dc8a22 Tuning the amount of spreading based on Koen's feedback 2010-04-20 00:47:22 -04:00
Jean-Marc Valin
b8ba70c99b Disabling resynthesis when not needed (need to remove folding for this to work) 2010-04-18 22:10:24 -04:00
Jean-Marc Valin
b8a06ee00d Re-introducing the successive spreading rotations, but in a two-step 
scheme. Keeping Hadamard as an option (disabled for now) for transients.
 2010-04-18 09:57:42 -04:00
Jean-Marc Valin
65a487069d Corrected some non-sensical code 2010-04-17 17:29:03 -04:00
Jean-Marc Valin
628c025373 Converted a few double-precision constants to single precision 2010-04-16 20:57:56 -04:00
Jean-Marc Valin
137f3366bc Changed compute_allocation_table() so it handles ebands that start and end in the same allocation band. Also fixed a minor C89 issue. 2010-04-14 17:42:22 -04:00
Jean-Marc Valin
9a92d61ee8 A bit more tuning on the pseudo-frac-Hadamard. Also Trying to improve 
transient spreading.
 2010-04-06 20:33:12 -04:00
Jean-Marc Valin
354bf60b04 Doing the spreading with a "pseudo-fractional-Hadamard" transform 2010-04-03 09:23:29 -04:00
Jean-Marc Valin
c7b01bad50 fixed-point: slightly increasing the decoder accuracy again 2010-03-19 23:17:28 -04:00
Jean-Marc Valin
3a4a463f0a fixed-point: Further reduction in mismatch 2010-03-15 22:55:51 -04:00
Jean-Marc Valin
3a0bc3d95c Allowing CELT to skip the low frequencies 2010-02-25 22:46:55 -05:00
Timothy Terriberry
8c7bb4c9c7 Expose the normalized range for reciprocal square roots in fixed-point mode. This allows subsequnt calculations to use the full precision of the result. 2009-10-31 13:35:40 -04:00
Jean-Marc Valin
a3803a98af misc minor changes 2009-10-24 11:24:34 -04:00
Jean-Marc Valin
73bf6332ed Making the multiplication in normalise_residual() produce a 32-bit result just 
to be on the safe side (not that I observed any overflow, but I can't prove
it can't happen).
 2009-10-20 07:22:04 -04:00
Jean-Marc Valin
234969c903 Removed the _t from all the celt*_t types to avoid clashing with POSIX 2009-10-17 22:12:42 -04:00
Jean-Marc Valin
8b2ff0da5a Updated copyright notices 2009-10-17 21:40:10 -04:00
Jean-Marc Valin
f7a1e165aa Renamed mix_pitch_and_residual() to normalise_residual(), after minor 
simplification.
 2009-10-07 06:56:03 -04:00
Jean-Marc Valin
f6dc1eba26 Further simplifications to mix_pitch_and_residual() (which no longer does 
anything that its name implies)
 2009-10-06 20:08:49 -04:00
Jean-Marc Valin
1e3263a267 Fix for some test program compat and an assertion that didn't make sense anymore 2009-10-02 17:48:25 -04:00
Jean-Marc Valin
d5e5436e07 Fix for folding_decision() in stereo mode and more cleaning up of the code 
now that we no longer do normalized pitch
 2009-09-30 20:50:41 -04:00
Jean-Marc Valin
75732de1a7 Tuning the spreading rotations 2009-09-29 22:35:32 -04:00
Jean-Marc Valin
095c1782c5 Removed code that is no longer necessary with denorm pitch and spreading 2009-09-17 22:38:34 -04:00
Jean-Marc Valin
3aa3afe74f Only calling intra_fold() when there's no pulse allocated 2009-09-11 20:28:29 -04:00
Jean-Marc Valin
a7750b90cc Re-introducing the successive rotations as a way to control low-bitrate 
tonal artefacts. This replaces folding for all cases where we have at least
one pulse.
 2009-08-29 22:52:03 +01:00
Jean-Marc Valin
164a229644 Reducing the size of the pulses->bits cache by restricting the number of pulses 
possible
 2009-07-23 07:24:03 -04:00
Jean-Marc Valin
798ab38b27 Using normalised M/S stereo data for folding and use separate folding gains 
for M and S.
 2009-07-12 20:41:29 -04:00
Jean-Marc Valin
ece2cfa2d2 removed useless comments 2009-07-04 22:46:38 -04:00
Jean-Marc Valin
4e5b7bc522 Tuning the folding gain to be higher when there's only one pulse and lower 
when there are many pulses.
 2009-07-03 15:09:07 -04:00
Jean-Marc Valin
cd29b02773 fixed-point: fixing two overflows that didn't really affect quality 2009-07-01 09:59:21 -04:00
Jean-Marc Valin
da1156af1c fixing a floating point bug for very small signals 2009-07-01 01:27:48 -04:00
Jean-Marc Valin
6d454d8dad This fixes a potential assertion failure with some very weak signals 2009-06-30 10:31:00 -04:00