Commits · error-correction · Stefan Westerfeld / audiowmark · GitLab

30 Dec, 2018 5 commits
- Fix test range for soft error test. · d907e39a
  Stefan Westerfeld authored Dec 30, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  d907e39a
- TODO: list possible improvements · 7144d41e
  Stefan Westerfeld authored Dec 30, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  7144d41e
- Fix signedness related compiler warnings. · 72be66e6
  Stefan Westerfeld authored Dec 30, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  72be66e6
- Convolution code error test: use code size to determine test range. · add74bee
  Stefan Westerfeld authored Dec 30, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  add74bee
- Add script to format table with test results. · 2c1007bc
  Stefan Westerfeld authored Dec 30, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  2c1007bc
29 Dec, 2018 1 commit
- Support testing with randomized bit pattern. · d1ffd1c4
  Stefan Westerfeld authored Dec 29, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  d1ffd1c4
26 Dec, 2018 4 commits
- Force /bin/bash as shell for some scripts. · e841de3e
  Stefan Westerfeld authored Dec 26, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  e841de3e
- Use overlapping synthesis windows. · cf547cc2
  Stefan Westerfeld authored Dec 26, 2018
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This should make the watermark sound more smooth, which should make it less
noticable.
Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  cf547cc2
- Helper script for file error rate table. · 79729459
  Stefan Westerfeld authored Dec 26, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  79729459
- Improve error rate test script (multi process support; huge test set). · c7305383
  Stefan Westerfeld authored Dec 26, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  c7305383
24 Dec, 2018 2 commits
- Use float for state table: improved performance. · 33b81069
  Stefan Westerfeld authored Dec 24, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  33b81069
- Add perf test for conv decoder. · b88e6950
  Stefan Westerfeld authored Dec 24, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  b88e6950
23 Dec, 2018 5 commits
- Randomize bit order after convolution encoding to avoid error bursts. · 298fe637
  Stefan Westerfeld authored Dec 23, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  298fe637
- Switch to 2 frames per bit, and use a rate 1/6 convolutional code. · 0b1fe048
  Stefan Westerfeld authored Dec 23, 2018
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This increases reliability with the same amount of frames.
Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  0b1fe048
- Implemented watermark soft decoding. · 7cf88a76
  Stefan Westerfeld authored Dec 23, 2018
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 - soft decoding improves error correction
 - soft decoding is now the default (use --hard to get hard decoding)
Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  7cf88a76
- gitignore · e4f48884
  Stefan Westerfeld authored Dec 23, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  e4f48884
- Add script to measure file error rate. · 392a2deb
  Stefan Westerfeld authored Dec 23, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  392a2deb
21 Dec, 2018 7 commits
- Use 128-bit message size in ber-test.sh. · 1d0d2571
  Stefan Westerfeld authored Dec 21, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  1d0d2571
- Make audiowmark add|get use error correcting code. · dd5b737a
  Stefan Westerfeld authored Dec 21, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  dd5b737a
- Add conv code api to get the number of coded bits for a fixed message size. · 61e44fca
  Stefan Westerfeld authored Dec 21, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  61e44fca
- Add test for soft decoding. · ae67a40c
  Stefan Westerfeld authored Dec 21, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  ae67a40c
- Fix bug in soft conv code decoder. · dd32a347
  Stefan Westerfeld authored Dec 21, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  dd32a347
- Split decoding functions into soft and hard decoding. · 619d2fec
  Stefan Westerfeld authored Dec 21, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  619d2fec
- Move convolution code tests to extra binary. · 33852ca9
  Stefan Westerfeld authored Dec 21, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  33852ca9
19 Dec, 2018 10 commits
- Refactor conv decode backtracking loop. · f937bf69
  Stefan Westerfeld authored Dec 19, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  f937bf69
- Performance improved trellis data structure initialization. · 0cb4466e
  Stefan Westerfeld authored Dec 19, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  0cb4466e
- Reduce test_size for performance reasons. · e179ea3f
  Stefan Westerfeld authored Dec 19, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  e179ea3f
- Optimize decoding somewhat; use convolution order 14 by default now. · 988df294
  Stefan Westerfeld authored Dec 19, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  988df294
- Provide convolution generators for order=14 and order=18. · 1eac837d
  Stefan Westerfeld authored Dec 19, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  1eac837d
- Cleanup decoder backtracking. · 24ace2b6
  Stefan Westerfeld authored Dec 19, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  24ace2b6
- Implemented optimal decoding algorithm (Viterbi). · 6ce5610b
  Stefan Westerfeld authored Dec 19, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  6ce5610b
- Add randomized error test for convolution encode/decode. · 584d4a3f
  Stefan Westerfeld authored Dec 19, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  584d4a3f
- Started to implement convolutional code. · 4ece7494
  Stefan Westerfeld authored Dec 19, 2018
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 - encoding should be ok
 - decoding doesn't really correct errors yet
Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  4ece7494
- Report raw bit errors; bump test set size to fit 384 bits. · d24be164
  Stefan Westerfeld authored Dec 19, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  d24be164
15 Dec, 2018 2 commits
- Merge branch 'reorder-devel' · 4db5c9a1
  Stefan Westerfeld authored Dec 15, 2018
  
  4db5c9a1
- Move windowing code out of the inner compute_frame_ffts loop. · 91697333
  Stefan Westerfeld authored Dec 15, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  91697333
14 Dec, 2018 4 commits
- Refactor watermark synthesis code. · 9db6c5e6
  Stefan Westerfeld authored Dec 14, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  9db6c5e6
- Simplify linear watermark generation. · 2df880aa
  Stefan Westerfeld authored Dec 14, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  2df880aa
- Merge linear/mix synthesis code. · 356b2c06
  Stefan Westerfeld authored Dec 14, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  356b2c06
- Refactor linear watermark generation. · 022848a1
  Stefan Westerfeld authored Dec 14, 2018
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Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>
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  022848a1