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- From: rdippold@qualcom.qualcomm.com (Ron Dippold)
- Subject: Re: Looking for telephone quality audio compression
- Message-ID: <rdippold.716147581@qualcom>
- Sender: news@qualcomm.com
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- Organization: Qualcomm, Inc., San Diego, CA
- References: <BuBn7u.BFu@news.cso.uiuc.edu> <rdippold.716077895@qualcom> <rdippold.716084481@qualcom>
- Date: Thu, 10 Sep 1992 17:53:01 GMT
- Lines: 88
-
- 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!
-