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U.S. Department of Defense
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LPC-10 2400 bps Voice Coder
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(Note that this release 1.5 is not from any "official" source. It is
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from Andy Fingerhut. Contact information below.)
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This package is available from:
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http://www.arl.wustl.edu/~jaf/lpc/lpc10-1.5.tar.gz
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Just some minor fixes to sample applications "nuke" and "unnuke" that
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caused them not to work correctly on compilers with 16 bit int's.
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This was only a bug in the sample application code, not in the LPC-10
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You can now compress (or decompress) multiple audio streams
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"simultaneously", by alternating the compression (or decompression) of
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frames for each audio stream. Only the C version supports this
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feature, but who really cared whether the Fortran version supported
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README-1.0 - The original README file from Release 1.0
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FAQ - Frequently Asked Questions items for LPC and CELP
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lpc55 - modified Fortran code for LPC-10 Version 55
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README - summary of modifications made
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README.f2c - hints on installing f2c on some machines,
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and notes on the f2c invocation options used
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README.jaf - hints on using the LPC-10 coder from a C application
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RCS - Revision Control System directory containing
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master files for all sources, showing the steps
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of changes that I made to the original 1.0 sources.
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lpc55-C - Hand-modified C version of code, most of
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which was created by running f2c on the
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Fortran code in directory lpc55 above. I'm
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fairly certain that the C code from the 1.0
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release was out of date with respect to the
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Fortran code, so it was not included in this
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data - Sample speech files, containing:
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dam9.spd - Sample input speech file
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dam9-out.spd - Speech processed by modified Fortran code.
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This is identical to dam9_lpc55.spd from
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release 1.0, except for 180 0 samples at the
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beginning, and many samples here and there
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that are off by 1, probably due to different
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abtool_1.2 - Sun GUI tool for playing listening comparisons
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between speech files (this is a beta version)
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bin - Several useful shell scripts for audio on Sun machines
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README - Description of audio file formats
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fortran-locals - Some files I made when determining whether local
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variables in Fortran subroutines and functions
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were like C "static" local variables or not.
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gcc-2.6.0-bug - A program that demonstrates a bug in GCC 2.6.0
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on the Solaris 2.4 machine siesta.cs.wustl.edu.
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I don't know how widespread this problem is,
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but it does have an unpleasant side effect if
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GCC 2.6.0 is used to compile f2c.
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See also the file README-1.0 for some other useful details.
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Applied Research Laboratory <-- this line is optional if
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Washington University, Campus Box 1045/Bryan 509 you have limited space
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Saint Louis, MO 63130-4899
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http://www.arl.wustl.edu/~jaf/