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| author | Koen Vos <koen.vos@skype.net> | 2011-12-13 14:47:31 -0500 |
|---|---|---|
| committer | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2011-12-13 14:47:31 -0500 |
| commit | bf75c8ec4d0dded188bc7793de6da56c7ff0be1c (patch) | |
| tree | c21bb05faf0a203b73e8f8aae90fc63dac27625d /silk/define.h | |
| parent | 6619a736376221f2782cecff55d051c3ecfc2ff7 (diff) | |
| download | libopus-bf75c8ec4d0dded188bc7793de6da56c7ff0be1c.tar.gz | |
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
Diffstat (limited to 'silk/define.h')
| -rw-r--r-- | silk/define.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/silk/define.h b/silk/define.h index dcfdee93..fe2a659a 100644 --- a/silk/define.h +++ b/silk/define.h @@ -91,9 +91,6 @@ extern "C" #define MAX_FRAME_LENGTH_MS ( SUB_FRAME_LENGTH_MS * MAX_NB_SUBFR ) #define MAX_FRAME_LENGTH ( MAX_FRAME_LENGTH_MS * MAX_FS_KHZ ) -#define MAX_ENCODER_DELAY 18 -#define MAX_DECODER_DELAY 8 - /* Milliseconds of lookahead for pitch analysis */ #define LA_PITCH_MS 2 #define LA_PITCH_MAX ( LA_PITCH_MS * MAX_FS_KHZ ) @@ -133,7 +130,9 @@ extern "C" #define QUANT_LEVEL_ADJUST_Q10 80 /* Maximum numbers of iterations used to stabilize a LPC vector */ -#define MAX_LPC_STABILIZE_ITERATIONS 20 +#define MAX_LPC_STABILIZE_ITERATIONS 30 +#define MAX_PREDICTION_POWER_GAIN 1e4f +#define MAX_PREDICTION_POWER_GAIN_AFTER_RESET 1e2f #define MAX_LPC_ORDER 16 #define MIN_LPC_ORDER 10 |