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Codec 2 is an open source (LGPL 2.1) low bit rate speech codec: http://rowetel.com/codec2.html written in C99 standard C.
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Author
2025-02-22
more search engine friendly \title
drowe67
2024-07-19
rebuilt to fix ?? refs, thanks psommerfeld
drowe67
2024-05-06
merge with main and fix conflict (I hope)
dr-codec2-doc
drowe67
2024-04-28
spelling error, thanks Tomas
David
2024-04-28
attempt at correcting (19), thanks Bruce Mackinnon
David
2023-12-18
Update codec2.pdf
Mooneer Salem
Regenerate codec2.pdf based on PR changes.
2023-12-11
ctest, README.md, first pass at github action
drowe67
2023-12-11
proof read, minor edits, update symbol glossary
drowe67
2023-12-10
first pass at Makefile to build doc
drowe67
2023-12-10
Added a list or source files; edited Further Work section
drowe67
2023-12-09
added LPC/LSP and LPC post figure figures, plus code to generate them
drowe67
2023-12-09
aligning 700C figures with maths
David Rowe
2023-12-07
mic EQ and VQ mean removal maths
David Rowe
2023-12-07
building up 700C section
drowe67
2023-12-03
decoder description, mode table
drowe67
2023-12-01
LPC/LSP enocder description, decoder block diagram
drowe67
2023-11-30
phase model edits and LPC/LSP encoder block diagram
drowe67
2023-11-29
phase synthesis edits
drowe67
2023-11-28
draft of phase synthesis section
drowe67
2023-11-28
make notation more consistent across sections
drowe67
2023-11-27
first draft of voicing estimation
drowe67
2023-11-26
rough draft of phase synthesis copied from source
drowe67
2023-11-26
sinusoidal synthesiser figure
drowe67
2023-11-25
first pass of synthesis section
drowe67
2023-11-25
building up synthesis section
drowe67
2023-11-25
drafted sinusoidal analysis section
drowe67
2023-11-24
sinusoidal encoder block diagram
drowe67
2023-11-24
first draft of NLP section, Glossary
drowe67
2023-11-23
moved some introductory info from DD to Intro
drowe67
2023-11-23
Mooneer's suggestions - thanks
drowe67
2023-11-23
inserted DC notch into NLP
David
2023-11-23
building up detailed design intro
drowe67
2023-11-20
encoder block diagram
drowe67
2023-11-20
building up encoder block diagram
drowe67
2023-11-20
parameter updates
drowe67
2023-11-19
sinusoidal figure OK
drowe67
2023-11-19
building up sinusoid figure
drowe67
2023-11-19
macro for sinusoid
drowe67
2023-11-19
drafted time-freq speech section, building up sinsuoidal model figure
drowe67
2023-11-19
building up plot support
drowe67
2023-11-18
kicking off Codec 2 documentation
drowe67