Jean-Marc Valin
278389defe
Automatic bandwidth decisions get more conservative as rate increases.
...
This should prevent errors in the bandwidth detection from affecting quality
when we have enough bits to be close to transparent.
2013-05-17 02:03:33 -04:00
Jean-Marc Valin
6862b44e7d
Slight simplification of the bandwidth detection code
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New code is especially easier to justify
2013-05-13 22:35:09 -04:00
Jean-Marc Valin
a8783a15b4
Converts the analysis to ALLOC()
2013-04-15 15:49:40 -04:00
Jean-Marc Valin
c37834b27e
Fixes a minor bug found by valgrind in the bandwidth detector
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The energy calculation from the packed FFTs ended up reading out-of-bound
memory for frequency zero. The bug was exposed by c5e04e4
2013-04-15 02:53:09 -04:00
Jean-Marc Valin
c5e04e4aa4
Makes bandwidth detection less aggressive.
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The original code was causing parts of a sine sweep to be completely dropped
due to the 300 Hz margin and the hysteresis. Also, fixes scaling for the
analysis downmix when the input is 16-bit PCM.
2013-03-12 11:24:53 -04:00
Robert Meakins
097fd4b111
Fixes C90 issues for obsolete compilers
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Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>
2013-03-11 13:39:17 -04:00
Jean-Marc Valin
73142b100a
Makes the speech/music probability estimation mode conservative
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This is done using an adaptive beta and an estimate of the speech
and music detection confidence
2013-02-28 15:30:51 -05:00
Jean-Marc Valin
742aac1056
Adds silence probability to speech/music detector
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Avoids biasing the decision when it's all silence/noise.
2013-02-22 16:44:56 -05:00
Jean-Marc Valin
51f4a32ec2
Adds support for delayed decision
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Variable duration option renamed to OPUS_SET_EXPERT_FRAME_DURATION,
with new API.
Also moves up the analysis to avoid having to do int->float conversion
on large buffers.
2013-02-20 04:08:34 -05:00
Jean-Marc Valin
48ac122141
Makes analysis usable for all frame sizes
2013-02-10 00:15:49 -05:00
Jean-Marc Valin
7ebacf430a
Moves analysis to the beginning of opus_encode()
2013-02-10 00:05:46 -05:00
Jean-Marc Valin
d683c76b88
Fixes MSVC warnings for double->float and float->int conversion
2012-12-21 16:17:38 -05:00
Jean-Marc Valin
7509fdb813
New bandwidth detection code
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Can now work up to full-band and uses lsb_depth to fix the noise issue.
2012-12-21 11:51:45 -05:00
Joshua Bowman
3b60e81d79
Fix the MSVC build.
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Updates the project files to include the new encoder source files.
Use OPUS_RESTRICT and include config.h to set the proper defines
for build under MSVC.
2012-10-23 12:20:32 -07:00
Jean-Marc Valin
b2e19ecd0c
copysignf() was C99-only
2012-10-09 19:13:04 -04:00
Jean-Marc Valin
0e490591b7
Gets rid of unused boost analysis code that never worked anyway.
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Also removes the -exp_analysis suffix from opus_get_version_string()
and fixes a "ISO C90 forbids mixed declarations and code" warning.
2012-10-09 13:51:44 -04:00
Jean-Marc Valin
317ffc203e
Tuning the speech/music probability model
2012-10-09 02:12:02 -04:00
Jean-Marc Valin
027ff070f0
Shrinks tansig table, makes data static const
2012-09-14 15:49:18 -04:00
Jean-Marc Valin
c5880fe48b
Builds the analysis files more cleanly than #including C files
2012-07-13 14:50:37 -04:00
Jean-Marc Valin
b15b30ce6d
Speeds up analysis by getting rid of calls to atan2() and cos()
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atan2() is replaced by Monty's approximation.
2012-07-13 14:50:36 -04:00
Jean-Marc Valin
0892c169c6
Tonality and pitch tuning
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Tuned the tonality estimator to trigger on signals where only part of the
spectrum is tonal. Also tuned the pitch detector not to be confused
by short-term correlation.
2012-07-13 14:50:36 -04:00
Jean-Marc Valin
2a9fdbc93d
Transient/VBR tuning, give more bits to frames where pitch changes
2012-07-13 14:50:35 -04:00
Jean-Marc Valin
971b055090
New transient code, weighted tonality
2012-07-13 14:50:35 -04:00
Jean-Marc Valin
70d90d115d
VBR tuning
2012-07-13 14:50:35 -04:00
Jean-Marc Valin
a20545781e
Adds automatic bandwidth detection
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Haven't tested it much and not sure not to use it without risk
for high-quality streams that may change bandwidth
2012-07-13 14:50:35 -04:00
Jean-Marc Valin
7609b67e6e
Adds low-energy feature, training with noise
2012-07-13 14:50:35 -04:00
Jean-Marc Valin
747c817d96
Adds MFCC standard deviation features
2012-07-13 14:50:35 -04:00
Jean-Marc Valin
cd213ea19c
Down to 17 features with same error rate
2012-07-13 14:50:34 -04:00
Jean-Marc Valin
ac3ac4a30c
Adds cepstral mean subtraction (CMS) to analysis
2012-07-13 14:50:34 -04:00
Jean-Marc Valin
9987a3b574
Speech/music discrimination (not used for anything yet)
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Also, reducing the VBR rate on panned mono
2012-07-13 14:50:34 -04:00
Jean-Marc Valin
73eb363e2c
Cleanup, slightly changed analysis band layout, MFCC-like features
2012-07-13 14:50:34 -04:00
Jean-Marc Valin
e9c353a09b
Cleans up the most ugly parts of the analysis code
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Should be mostly usable now.
2012-07-13 14:50:34 -04:00
Jean-Marc Valin
1a2e7650f9
Adds an analysis function to control VBR
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Conflicts:
src/opus_encoder.c
2012-07-13 14:50:34 -04:00
