Jean-Marc Valin
ac1da4f42b
Codec state simplification
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Making the preemphasis memory an array of two, removing unused fields
2010-07-24 12:32:37 -04:00
Jean-Marc Valin
802f6eab9b
Making a bunch of things static
2010-07-23 17:02:23 -04:00
Jean-Marc Valin
617af25e5c
Cleaning up intra_decision()
2010-07-23 16:54:45 -04:00
Jean-Marc Valin
ca6533cd88
Energy quantization tuning.
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Prediction coefficient now depends on the frame size. Also, the pdfs and means
have been adjusted and better quantized. This breaks compatibility of course.
2010-07-23 16:10:36 -04:00
Jean-Marc Valin
6bf3b0a7a1
The coarse energy budget is no longer part of the bit-stream.
...
It is now the encoder's responsability to take care of it to avoid
busting the budget.
2010-07-19 14:32:40 -04:00
Jean-Marc Valin
b1e017f58d
Error checking on the decoder side
2010-07-18 21:20:35 -04:00
Jean-Marc Valin
9d785afb67
Encoder now has a way to check whether an error has occurred
2010-07-18 09:42:05 -04:00
Jean-Marc Valin
8952c45ea5
The encoder and decoder can now process audio encoded at a higher rate
...
than what they're running at.
2010-07-16 21:48:44 -04:00
Jean-Marc Valin
85f41b20df
Some work towards being able to encode a 48 kHz stream from 32 kHz audio (incomplete)
2010-07-16 18:12:45 -04:00
Jean-Marc Valin
3b0df0dc2a
All modes based on 2.5 ms short blocks now use the same definition
2010-07-16 15:55:30 -04:00
Jean-Marc Valin
69921c4cde
Considering the end band in more places in the code
2010-07-16 15:25:30 -04:00
Jean-Marc Valin
0be05b0335
Encoding transient_time independently of the sampling rate
2010-07-16 14:23:03 -04:00
Jean-Marc Valin
223b69db02
Better support for non-48 kHz sampling rates
2010-07-16 11:47:50 -04:00
Jean-Marc Valin
af1fce93b1
Pre-emphasis coefficients now part of the mode and has a numerator as well
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as a denominator
2010-07-16 11:05:06 -04:00
Jean-Marc Valin
e34c85a0cc
Using short blocks a bit more often now that we have variable tf resolution
2010-07-15 17:57:50 -04:00
Jean-Marc Valin
2ed5e67a2e
Handling the start band and end band in tf encoding
2010-07-13 18:18:23 -04:00
Jean-Marc Valin
525d7cfdc4
Support for adjusting the end band
2010-07-13 18:18:23 -04:00
Jean-Marc Valin
72513f3cc7
Sharing twiddle factors across all MDCTs
2010-07-07 21:26:38 -04:00
Jean-Marc Valin
4424b5a803
Updating DISABLE_FLOAT_API use
2010-07-06 19:37:23 -04:00
Jean-Marc Valin
b6a5f9d38f
fixed point bug fix in tf_analysis()
2010-07-06 17:57:14 -04:00
Jean-Marc Valin
c7bcf389da
Another coarse budget fix for _ec() calls
2010-07-05 14:33:49 -04:00
Jean-Marc Valin
bdcaaf73c6
Fixed a few more issues with the _ec() calls.
2010-07-05 13:52:41 -04:00
Jean-Marc Valin
71ae6d4714
Some C90-ication
2010-06-27 21:55:08 -04:00
Jean-Marc Valin
a57e924f2e
Removing some warnings
2010-06-27 00:53:51 -04:00
Jean-Marc Valin
a01106587c
Improved quality of small frame sizes at low bitrate.
...
Adding a temporal energy floor to prevent extremely small values when there's
only one bin in the band.
2010-06-23 15:22:54 -04:00
Jean-Marc Valin
6b95d8fdb8
Improved code for reusing ec structures
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Using the number of unallocated bytes for coarse quantization and VBR
instead the total number of bytes.
2010-06-21 21:39:44 -04:00
Jean-Marc Valin
30d5125bff
No need to memset() the byte buffer
2010-06-21 17:55:28 -04:00
Jean-Marc Valin
6c3788cb53
Removing old PCL, added plc.h
2010-06-20 23:01:33 -04:00
Jean-Marc Valin
feca095e96
fixed-point: New PLC now enabled by default
2010-06-17 20:25:51 -04:00
Jean-Marc Valin
7b7f07120e
fixed-point: More work on the PLC
2010-06-17 20:10:02 -04:00
Jean-Marc Valin
456eab2e4f
More work on fixed-point Levinson-Durbin
2010-06-16 22:38:57 -04:00
Jean-Marc Valin
890a9c05e0
Implementing two choices for the tf resolution
2010-06-13 08:06:28 -04:00
Jean-Marc Valin
e2d5b33780
Completely disabling the tf code at low bitrate
2010-06-06 23:16:40 -04:00
Jean-Marc Valin
0a571ef92a
Encoding the tf parameters after coarse energy
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Also a minor cleanup to the recombining/division
2010-06-05 23:12:19 -04:00
Jean-Marc Valin
6202c746cf
Fix for PLC crash when using large frames
2010-06-01 00:30:37 -04:00
Jean-Marc Valin
32589cd33e
Trying not to crash on bit errors
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When the pitch flag gets corrupted, make sure that pitch is actually
allowed instead of generating a bogus pitch index and crashing.
2010-05-31 21:56:12 -04:00
Jean-Marc Valin
816f893569
removed stupid code in transient_analysis()
2010-05-31 21:36:46 -04:00
Timothy B. Terriberry
43e9406201
Change ec_{enc|dec}_bit_prob to take probabilities in units of 1/65536 instead of 1/256. This allows them to use a single 16x16->32 multiply instead of a 24x8->32 multiply. Also change the time-frequency resolution flag coding to ensure that "0" is always the most-probable symbol (i.e., that prob("1")<50%), as that's where all the rounding error accumulates.
2010-05-29 23:45:28 -04:00
Jean-Marc Valin
8cc945c53a
Cleaning up VBR to be frame-size independent
2010-05-29 08:07:18 -04:00
Jean-Marc Valin
7331977c29
RD optimisation now takes bitrate into account
2010-05-28 21:12:39 -04:00
Jean-Marc Valin
bdb5871bc4
Simplification to the transient detection code
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Discarding the amplitude of the overlap for "frame_max"
2010-05-28 18:58:42 -04:00
Jean-Marc Valin
8823261738
More simplifications to the Viterbi code
2010-05-28 18:01:02 -04:00
Jean-Marc Valin
0ef39c9cc4
Simplifications to the tf_res RD code
2010-05-28 17:50:34 -04:00
Jean-Marc Valin
9d420c58e9
Viterbi-based RD optimization of the tf_res decisions
2010-05-28 17:26:27 -04:00
Jean-Marc Valin
581fdba936
changing probability of first tf resolution symbol
2010-05-28 06:56:23 -04:00
Jean-Marc Valin
163b76e8c4
Adaptive time-frequency resolution
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Encoding the optimal tf-tradeoff for each band and then
applying it during quantization.
2010-05-27 23:56:53 -04:00
Jean-Marc Valin
9f89cab6ec
Improving the transient detection
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When a transient occurs in the overlap between two frames, we
now make sure that both these frames are coded as transients
2010-05-21 14:18:38 -04:00
Jean-Marc Valin
cae30df09a
Getting rid of PVQ-level split
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Adding one more level of band splitting so that splitting at the
PVQ encoding level is no longer necessary.
2010-05-21 00:26:03 -04:00
Jean-Marc Valin
5f96146a85
Implemented CELT_SET_START_BAND
2010-05-19 13:38:36 -04:00
Jean-Marc Valin
f5e2e32d15
Support for passing your own ec state to the decoder
2010-05-19 12:05:02 -04:00
