From: leo@zelator.in-berlin.de (Stefan Hartmann)
Newsgroups: comp.dsp,comp.compression.research
Subject: Re: Looking for telephone quality audio compression
Date: 13 Sep 92 17:29:18 GMT
Organization: Puplic-Access-Xenix-System

In <rdippold.716147581@qualcom> rdippold@qualcom.qualcomm.com (Ron Dippold) writes:

>Here's some excellent info on CELP in general:

>---------------------- start quote ------------------------

>Joe Campbell says:

>In case you'd like to experiment with CELP, you can obtain a software
>implementation of the 4800 bps Fed Std CELP coder for free:

>The U.S. DoD's Federal-Standard-1016 based 4800 bps code excited linear
>prediction voice coder version 3.2 (CELP 3.2) Fortran and C simulation source
>codes are now available for worldwide distribution at no charge (on DOS
>diskettes, but configured to compile on Sun SPARC stations) from:

>Bob Fenichel
>National Communications System
>Washington, D.C.  20305
>1-703-692-2124
>1-703-746-4960 (fax)

>In addition to the source codes, example input and processed speech files
>are included along with a technical information bulletin to assist in
>implementation of FS-1016 CELP.  (An anonymous ftp site is being considered
>for future releases.)

>Copies of the actual standard "Federal Standard 1016, Telecommunications:
>Analog to Digital Conversion of Radio Voice by 4,800 bit/second Code
>Excited Linear Prediction (CELP)" are available for $2.50 each from:

>GSA Rm 6654
>7th & D St SW
>Washington, D.C.  20407
>1-202-708-9205

>The following articles describe the Federal-Standard-1016 4.8-kbps CELP
>coder (it's unnecessary to read more than one):

>Campbell, Joseph P. Jr., Thomas E. Tremain and Vanoy C. Welch,
>"The Federal Standard 1016 4800 bps CELP Voice Coder," Digital Signal
>Processing, Academic Press, 1991, Vol. 1, No. 3, p. 145-155.

>Campbell, Joseph P. Jr., Thomas E. Tremain and Vanoy C. Welch,
>"The DoD 4.8 kbps Standard (Proposed Federal Standard 1016),"
>in Advances in Speech Coding, ed. Atal, Cuperman and Gersho,
>Kluwer Academic Publishers, 1991, Chapter 12, p. 121-133.

>Campbell, Joseph P. Jr., Thomas E. Tremain and Vanoy C. Welch, "The
>Proposed Federal Standard 1016 4800 bps Voice Coder:  CELP," Speech
>Technology Magazine, April/May 1990, p. 58-64.

>For U.S. FED-STD-1016 (4800 bps CELP) _realtime_ DSP code
>and information about products using this code, contact:

>John DellaMorte
>DSP Software Engineering
>165 Middlesex Tpk, Suite 206
>Bedford, MA  01730
>1-617-275-3733
>1-617-275-4323 (fax)
>dspse.bedford@channel1.com

>DSP Software Engineering's code can run on a DSP Research's Tiger 30 board
>(a PC board with a TMS320C3x and analog interface suited to development work)
>or on Intellibit's AE2000 TMS320C31 based 3" by 2.5" card.

>DSP Research                Intellibit
>1095 E. Duane Ave.          P.O. Box 9785
>Sunnyvale, CA  94086        McLean, VA  22102-0785
>(408)773-1042               (703)442-4781
>(408)736-3451 (fax)         (703)442-4784 (fax)
>-- 
>.............................................................................
>; Joe Campbell  N3JBC  jpcampb@afterlife.ncsc.mil  74040.305@compuserve.com ;
>; My opinions are mine!   Happiness = Reality - Expectations, Click & Clack ;
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

>Thanks, Joe!

>He also told me in email that if you wish it to also be available via
>anonymous ftp, tell Bob Fenichel.

>--
>Dan Frankowski                dfrankow@cs.umn.edu


>------------------- end quote ---------------------
>-- 
>Sauron is alive in Argentina!

Does this code also allow lossy music compression/decompression ?

I'm still looking for a lossy WAV compressor/decompressor !

Best regards Stefan Hartmann.
email to: leo@zelator.in-berlin.de


-- 
 
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