Commit graph

16 commits

Author SHA1 Message Date
Jean-Marc Valin
386883179a
Fixing some opus_int vs opus_int32 mismatches
Reported by Mark Warner.
2016-10-05 00:09:00 -04:00
Koen Vos
0a698d6522 merge back in the LTP gain safety limiter 2016-07-19 16:11:41 -04:00
Koen Vos
f06774c640 more conservative scaling of LTP corrs; remove assert that checks for negative residual energy; discard CB entries leading to such negative energies 2016-07-19 16:11:09 -04:00
Koen Vos
90f8c5ef4d Clean up: replace tabs by spaces 2016-07-17 15:05:55 -04:00
Koen Vos
8c9d41867e simplified computation of LTP coefs 2016-07-17 15:05:55 -04:00
Timothy B. Terriberry
554b349cdb There are no tabs in source code.
There is also no trailing whitespace.
2014-10-03 21:49:57 -07:00
xiangmingzhu
c95c9a048f Cisco optimization for x86 & fixed point
1. Only for fixed point on x86 platform (32bit and 64bit, uses SIMD
   intrinsics up to SSE4.2)
2. Use "configure --enable-fixed-point --enable-intrinsics" to enable
   optimization, default is disabled.
3. Official test cases are verified and passed.

Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>
2014-10-03 21:16:00 -04:00
Jean-Marc Valin
9864c51592 Makes pitch gain control less aggressive 2013-11-20 17:14:01 -05:00
Jean-Marc Valin
854e9bd499 Using the maximum frequency response of pitch taps instead of maxabs 2013-11-20 13:39:23 -05:00
Koen Vos
c63fb978be Constrains accumulated pitch gain to avoid potential instability.
Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>
2013-11-20 08:32:32 -05:00
Ralph Giles
f2446c25c6 Remove trailing whitespace from the license headers. 2013-09-16 14:40:04 -07:00
Timothy B. Terriberry
80ad38370c Convert quotes in license headers to ASCII.
Since the last patch originally had them mangled (presumably by
 mailer, http server, or something else), let's just get rid of
 them.
2013-05-19 19:16:11 -07:00
Jean-Marc Valin
ae00e60d35 License update using the IETF Trust flavour of the BSD on the Silk code 2012-04-20 16:31:04 -04:00
Koen Vos
bf75c8ec4d SILK fixes following last codec WG meeting
decoder:
- fixed incorrect scaling of filter states for the smallest quantization
  step sizes
- NLSF2A now limits the prediction gain of LPC filters

encoder:
- increased damping of LTP coefficients in LTP analysis
- increased white noise fraction in noise shaping LPC analysis
- introduced maximum total prediction gain.  Used by Burg's method to
  exit early if prediction gain is exceeded.  This improves packet
  loss robustness and numerical robustness in Burg's method
- Prefiltered signal is now in int32 Q10 domain, from int16 Q0
- Increased max number of iterations in CBR gain control loop from 5 to 6
- Removed useless code from LTP scaling control
- Optimization: smarter LPC loop unrolling
- Switched default win32 compile mode to be floating-point

resampler:
- made resampler have constant delay of 0.75 ms; removed delay
  compensation from silk code.
- removed obsolete table entries (~850 Bytes)
- increased downsampling filter order from 16 to 18/24/36 (depending on
  frequency ratio)
- reoptimized filter coefficients
2011-12-13 14:47:31 -05:00
Koen Vos
acc7a6c78b Reformatting changes with an update to the MSVC project files 2011-10-28 19:44:26 -04:00
Jean-Marc Valin
1c2f5633d1 Removed all the silk_ prefixes in source file names (not symbols) 2011-09-16 01:16:53 -07:00
Renamed from silk/silk_quant_LTP_gains.c (Browse further)