84 lines
2.3 KiB
Plaintext
84 lines
2.3 KiB
Plaintext
Codec 2 README
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--------------
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Codec 2 is an open source (LGPL licensed) speech codec for 2400 bit/s
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and below. For more information please see:
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http://rowetel.com/codec2.html
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Also included is a FDMDV modem, see README_fdmdv.txt
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Quickstart
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----------
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1/ Listen to Codec 2:
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$ ./configure && make
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$ cd src
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$ ./c2demo ../raw/hts1a.raw hts1a_c2.raw
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$ ../script/menu.sh ../raw/hts1a.raw hts1a_c2.raw
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NOTE: For playback testing, menu.sh requires either the 'play',
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'aplay' or 'ossplay' programs to be installed (see
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http://sox.sourceforge.net/, http://www.alsa-project.org/, or
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http://www.opensound.com/ respectively).
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2/ Compress and Decompress a file:
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$ ./c2enc 2400 ../raw/hts1a.raw hts1a_c2.bit
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$ ./c2dec 2400 hts1a_c2.bit hts1a_c2.raw
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3/ Same thing with pipes:
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$ ./c2enc 1400 ../raw/hts1a.raw - | ./c2dec 1400 - - | play -t raw -r 8000 -s -2 -
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Programs
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--------
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1/ c2demo encodes a file of speech samples, then decodes them and
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saves the result.
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2/ c2enc encodes a file of speech samples to a compressed file of
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encoded bits.
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3/ c2dec decodes a compressed file of bits to a file of speech
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samples.
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4/ c2sim is a simulation/development version of Codec 2. It allows
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selective use of the various Codec 2 algorithms. For example
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switching phase modelling or LSP quantisation on and off.
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Debugging
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---------
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1/ For dump file support:
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$ cd codec2
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$ CFLAGS=-DDUMP ./configure
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$ make clean && make
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2/ To use gdb:
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$ libtool --mode=execute gdb c2sim
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Directories
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-----------
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fltk - FLTK GUI programs(s)
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octave - Octave scripts used for visualising internal signals
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during development
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portaudio - Portaudio test programs
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script - shell scripts for playing and converting raw files
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src - C source code
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raw - speech files in raw format (16 bits signed linear 8 kHz)
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unittest - unit test source code
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voicing - hand-estimated voicing files, used for development
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wav - speech files in wave file format
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win32 - Support for building Windows DLL version of Codec 2 and FDMDV libraries
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TODO
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----
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[ ] Get win32/Makefile integrated into Automake system, such that if
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i586-mingw32msvc exists the Win32 code gets automatically built.
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[ ] Same for fltk & portaudio, build these conditionally if libs exist |