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Started by Phil Lapsley
Sun, 11 Oct 1992 17:36
comp.dsp FAQ [1 of 2]
Author: Phil Lapsley
Date: Sun, 11 Oct 1992 17:36
Date: Sun, 11 Oct 1992 17:36
958 lines
41058 bytes
41058 bytes
Archive-name: dsp-faq/part1
Last-modified: Sun Oct 11 1992
Version: 0.5
Here is the sixth release of the comp.dsp FAQ. We are eagerly seeking
information on all topics, from the best layout (e.g., should chips and
prototype boards be another FAQ?) to a good annotated list of DSP
articles and reference books. Please email your suggestions to
comp-dsp-faq@ohm.Berkeley.EDU. Meta-comments are all in curly braces
{like this}. Acknowledgements to people responsible for articles
and/or bits of information are in square brackets, [like so].
You can ftp the very latest version of this FAQ from: evans.ee.adfa.oz.au
(131.236.30.24) in pub/dsp/dsp-faq.help, or from copernicus.Berkeley.EDU
in dsp-faq.help.
We are most grateful to the following contributors who helped out with version
0.5 of the FAQ:
John Fisher johnf@dsp.sps.mot.com
Ed Hall edhall@rand.org
Vince Herried vjh21@cas.org
Gints Klimanis gints@roadkill.esd.sgi.com
Ronnin Yee ronnin.yee@analog.com
and the following folks who helped out with previous versions:
Joe Campbell jpcampb@afterlife.ncsc.mil
Malachy Devlin madmal@spd.eee.strathclyde.ac.uk
Brian Evans evans@markov.eedsp.gatech.edu
Dan Frankowski dfrankow@cs.umn.edu
Maurice Givens maury@tellabs.com
Eric Jacobsen ericj@hwcae.honeywell.com
Pete Janzow pjanzow@prenhall.com
Richard Kim richard@math.mit.edu
Greg Koker greg.koker@analog.com
John Lazzaro lazzaro@boom.CS.Berkeley.EDU
Paul Russell paulr@syma.sussex.ac.uk
Bill Schottstaedt bil@ccrma.stanford.edu
Greg Smart rcogs@citri.edu.au
Andrew Ukrainec ukrainec@nimios.Eng.McMaster.CA
Get your name here - contribute something! (If you don't want your
email address listed in your contribution, please indicate so.)
Phil Lapsley phil@ohm.Berkeley.EDU (temporary FAQ maintainer)
Bradley Hards hards@ee.adfa.oz.au (original FAQ maintainer)
=============================================================================
0. What is comp.dsp?
1. General DSP.
1.1 Summary of DSP books and articles.
1.2 Where can I get free software for general DSP?
1.2.1 What is Gabriel? Where can I get it?
1.2.2 What is Ptolemy? Where can I get it?
1.2.3 What is Khoros? Where can I get it?
1.2.4 What are DSP Tutorials? Where can I get them?
1.2.5 What are some DSP extensions to MATLAB? Where can I get them?
1.2.6 What is the Signal Processing Package for Mathematica?
Where can I get it?
1.2.7 What is the Controls System Package for Mathematica?
Where can I get it?
1.2.8 What are some other DSP Notebooks for Mathematica?
1.2.9 What is the Linear Systems Toolbox for Maple? Where can I get it?
1.2.10 Where can I get text to speech conversion software?
2. Algorithms and standards.
2.1 Where can I get some algorithms for DSP?
2.2 What is CELP and LPC? Where can I get source for them?
2.3 How does pitch perception work, and how do I implement it?
2.4 What standards exist for digital audio? What is AES/EBU?
What is S/PDIF?
2.5 What is mu-law encoding? Where can I get source for it?
2.6 How can I do CD <-> DAT sample rate conversion?
3. Programmable DSP chips and their software.
3.1 What are some current, popular programmable DSP chips?
3.2 Software for Motorola DSPs.
3.2.1 Where can I get a free assembler for the Motorola DSP56000?
3.2.2 Where can I get a free C compiler for the Motorola DSP56000?
3.2.3 Where can I get algorithms or libraries for Motorola DSPs?
What is the number for the Motorola DSP BBS?
3.2.4 Where can I get NeXT-compatible Motorola DSP56001 code?
3.3 Software for Texas Instruments DSPs.
3.3.1 Where can I get algorithms or libraries for TI DSPs?
What is the number for the TI DSP BBS?
3.3.2 Where can I get a free C compiler for the TMS320C30?
4. Hardware.
4.1 DSP development boards.
4.1.1 IBM PC.
4.1.2 Mac Nubus.
4.1.3 SBus.
4.1.4 VMEbus.
4.1.5 Next bus.
4.1.6 SCSI bus.
4.1.7 Standalone.
4.2 Who makes AES/EBU chips?
5. List of manufacturers and addresses.
To search for a particular question within a text editor, look for the
pattern "Q#.##:", e.g., "Q1.2:".
=============================================================================
Q0: What is comp.dsp?
Comp.dsp is a worldwide UseNet news group that is used to discuss
various aspects of digital signal processing. It is unmoderated,
though we try to keep the signal to noise ratio up :-). If you need to
ask a question that isn't in the FAQ, and can't figure out how to post,
consult news.newusers.questions. Other relevant news groups are
comp.compression and sci.image.processing.
=============================================================================
1. General DSP.
This section deals with general DSP, that is, DSP books, algorithms,
and packages that are not related to a particular manufacturer's DSP chip.
=========================================================================
Q1.1: Summary of DSP books and significant research articles.
(1) Bibles of DSP:
A.V. Oppenheim and R.W. Schafer, "Digital Signal Processing",
Prentice-Hall, Inc., Englewood Cliffs, N.J., 1975.
A.V. Oppenheim and R.W. Schafer, "Discrete-Time Signal Processing"
Prentice Hall, Englewood Cliffs, New Jersey 07632, 1989. ISBN 0-13-216292-X
This is an updated version of the original, with some old material deleted
and lots of new material added.
L.R. Rabiner & R.W. Schafer, "Digital Processing of Speech Signals",
Prentice Hall, 1978, ISBN 0-13-213603-1.
R. E. Crochiere & L. R. Rabiner, "Multirate Digital Signal Processing",
Prentice-Hall, 1983, ISBN 0136051626.
This book is the only real reference for filter banks and multirate
systems, as opposed to being a tutorial.
Thomas Parsons, "Voice and Speech Processing", McGraw-Hill, 1987,
ISBN 0-07-048541-0.
Addresses the cocktail party effect, as well as other material.
[Maurice Givens, maury@tellabs.com]
--------------------------------------------------
(2) Adaptive signal processing:
S. Haykin, "Adaptive Filter Theory", 2nd Ed., Prentice Hall,
Englewood Cliffs, NJ, 1991.
B. Widrow and S.D. Stearns, "Adaptive Signal Processing",
Prentice-Hall, Inc., Englewood Cliffs, N.J., 1985.
--------------------------------------------------
(3) Array signal processing:
J.E. Hudson, "Adaptive Array Principles", IEE London and New York,
Peter Peregrinus Ltd. Stevenage, U.K., and New York, 1981.
R.A. Monzingo and T.W. Miller, "Introduction to Adaptive Arrays"
John Wiley and Sons, New York, 1980.
S. Haykin, J.H. Justice, N.L. Owsley, J.L. Yen, and A.C. Kak
"Array Signal Processing", Prentice-Hall, Inc., Englewood Cliffs, N.J., 1985.
R.T. Compton, Jr., "Adaptive Antennas, Concepts and Performance",
Prentice-Hall, 1988, ISBN 0-13-004151-3.
--------------------------------------------------
(4) Windowing articles.
F. J. Harris, "On the Use of Windows for Harmonic Analysis with the DFT",
IEEE Proceedings, January 1978, pp. 51-83.
Perhaps the classic overview paper for discrete-time windows. It discusses
some 15 different classes of windows including their spectral responses and
the reasons for their development. [Brian Evans, evans@eedsp.gatech.edu]
Nezih C. Geckinli & Davras Yavuz, "Some Novel Windows and a Concise Tutorial
Comparison of Window Families", IEEE Transactions on Acoustics, Speech,
and Signal Processing, Vol. ASSP-26, No. 6, December 1978.
[Bob Beauchaine, bobb@vice.ico.tek.com]
=========================================================================
Q1.2: Where can I get free software for general DSP?
The packages listed below are mostly for general purpose DSP, that is,
DSP that is not specific to a particular programmable DSP chip. See
the later sections in the FAQ for software relevant to a particular
programmable DSP chip.
According to Brian Evans: "There was an entire session on this subject
[free DSP software] at ICASSP '92, chaired by Dr. Sally Wood and
Dr. James McClellan. It appears in Volume 4 of the Proceedings, pages
73-112. There will be another such session at ICASSP '93." [Brian Evans,
evans@eedsp.gatech.edu] Much of the information below is from Brian's mail.
--------------------------------------------------
Q1.2.1: What is Gabriel? Where can I get it?
Package: Gabriel
Description:
Hierarchical block diagram environment for prototyping signal processing
systems on single or multiple processors. Algorithms expressed in block
diagram form can be simulated, and assembly code can also be generated for
the Motorola DSP56001 and DSP96002. Gabriel has almost been obsoleted by
Ptolemy, below.
Platforms: sun 3, sun 4, X windows. Written in Lisp (lisp compiler supplied).
Contact: Alan Kamas, aok@ohm.berkeley.edu.
To obtain:
Anonymous ftp to copernicus.berkeley.edu, and retrieve gabriel-license.shar.
This is a shar file of licenses that you must sign and mail back to us (the
old-fashioned way) before we can give you the source. Then we can tell you
the password for an account that will allow you to FTP Gabriel.
--------------------------------------------------
Q1.2.2: What is Ptolemy? Where can I get it?
Package: Ptolemy
Description:
Hierarchical, heterogeneous block diagram DSP design environment. Supports
simulation (dataflow and discrete event), code generation, and hardware
modeling. All the features of Gabriel, but much cleaner and better designed.
Platforms: sun 3, sun 4, DECstation, HP, VAX. X windows. Written in C++.
Contact: Alan Kamas, aok@ohm.berkeley.edu.
To obtain:
Anonymous ftp to forney.berkeley.edu, and retrieve ptolemy-license.shar.
This is a shar file of licenses that you must sign and mail back to us (the
old-fashioned way) before we can give you the source. Then we can tell you
the password for an account that will allow you to FTP Ptolemy.
--------------------------------------------------
Q1.2.3: What is Khoros? Where can I get it?
Package: Khoros
Description:
Block diagram simulator for image and video processing. 1-D signal processing
is also supported. See the UseNet group comp.soft-sys.khoros.
Platforms: sun 3, sun 4, others? X windows. Written in C.
To obtain:
Anonymous ftp to pprg.eece.unm.edu, cd /pub/khoros/release, get install.ftp.
--------------------------------------------------
Q1.2.4: What are DSP Tutorials? Where can I get them?
Package: DSP Tutorials
Description: Computer aided instruction.
Platforms: suns under SunView.
Contact: Dr. Sally Wood, Electrical Engineering Department, Santa Clara
University, Santa Clara, CA 95053.
--------------------------------------------------
Q1.2.5: What are some DSP extensions to MATLAB? Where can I get them?
Package: MATLAB user's group public domain extensions to MATLAB
Description:
The MATLAB Digest is issued at irregular intervals based on the number
of questions and software items contributed by users. To make
submissions to the digest, please send to hwilson@ua1vm.ua.edu with a
subject: "DIG" and description.
For the Pacific, try netlib@draci.cs.uow.edu.au located at the
University of Wollongong, NSW, Australia.
A plethora of toolboxes are available at FTP site: research.att.com
(use netlib for the username)
General index for the MATLAB User Group software library
----------------------------------------------------------
Currently there are the following subdirectories:
approximation approximation theory
archive old MATLAB user group digests
control control theory
dataanalysis data analysis and statistics
graphics graphics programs
integration numerical integration
linearalgebra linear algebra utilities
misc miscellaneous
ode ordinary differential equations
optimization as the name says
pde partial differential equations
rootfinding zero-finding routines
specialfunctions special functions
teaching for classroom use
tools miscellaneous tools
In order to get an index for a subdirectory (tools, say)
send the message
send index from MATLAB/tools
to netlib@ornl.gov.
In order to get some code, (unbundle in the `tools'
directory, say), send the message
send unbundle from MATLAB/tools
to netlib@ornl.gov.
FOR STUDENTS: Prentice Hall has published a student edition of matlab
which contains a book and set of disks for PCs and Macs. The software
is limited only in matrix size (32 x 32 matrix; 1024 elements) and in
its ability to import or call C or Fortran subroutines. On the plus
side, it is able to run without a coprocessor (it will use one if it is
present) and it includes a subset of the Signal Processing and Controls
Toolboxes, The Signals and Systems Toolbox, which provides for added
functionality. Book only (about US$30): ISBN = 0138560064; Book + disk:
(about US$50 ISBN=0-13-855974-0 for 3.5" or ISBN=0-13-855982-1 for 5.25
Macintosh version: ISBN=0-13-855990-2. There will be related books out
by mid to late 1993 : Computer Aided Signal Processing with MATLAB, by
Burrus, Oppenheim, McClellan, Parks, Schafer, and Schussler; and Signal
Processing : A Computer Approach, by Etter. More books in this MATLAB
Curriculum Series are planned. For general info: matlab@prenhall.com
[From the Matlab Users Group (Editor, hwilson@ua1vm.ua.edu)]
--------------------------------------------------
Q1.2.6: What are the Signal Processing Packages for Mathematica?
Where can I get them?
Package: Signal Processing Pacakages (SPP) and Notebooks.
Description:
Public domain extensions to Mathematica. Enables the symbolic
manipulation of signal processing expressions: 1-D discrete/continuous
convolutions and 1-D/m-D linear transforms (Laplace, Fourier, z, DTFT,
and DFT). For linear transforms, you can specify your own transform
pairs and see the intermediate computations. Great for showing students
how to take transforms, or for deriving input-output relationships in a
transform domain. Additional abilities include analog filter design,
solving DE's using transforms, converting signal processing expressions
to their equivalent TeX forms, and number theoretic operations (Bezout
numbers, Smith Form decompositions, and matrix factors). Accompanying
SPP are tutorial notebooks on analog filter design, Fourier analysis,
piecewise convolution, and the z-transform (includes a discussion of
fundamentals of digital filter design). These Notebooks illustrate
difficult concepts (such as the flip-and-slide view of convolution)
through animation. A Notebook reader is available in the public domain
for Macintosh computers (a BinHexed version is on the ftp site).
FOR STUDENTS: A student version of Mathematica is available for $175.
The price includes a copy of the reference manual. The only drawbacks
to the student version are that the floating point coprocessor is dis-
abled and that upgrades cannot be ordered.
Contact: Brian Evans, evans@eedsp.gatech.edu.
To obtain: anonymous ftp to gauss.eedsp.gatech.edu (130.207.226.24).
(available in UNIX, Mac, and MS-DOS archive formats).
--------------------------------------------------
Q1.2.7: What is the Control Systems Analysis Packages for Mathematica?
Where can I get them?
Package: Control Systems Analysis Package (COSYPAK) and Notebooks
Description: Public domain extension to Mathematica. Classical and
state-space control analysis and design methods. The Notebooks
supplement the material in the textbook "Modern Controls Theory" by
Ogata. Largely based on the Signal Processing Packages (SPP, see above).
Contact: Dr. Sreenath, sree@veda.esys.cwru.edu.
To obtain: anonymous ftp veda.esys.cwru.edu (129.22.40.9).
--------------------------------------------------
Q1.2.8: What are some other Mathematica DSP Notebooks?
The following Mathematica notebooks can be ftped from ccrma-ftp.stanford.edu:
pub/DSP/GenHamming.ma.Z Generalized Hamming windows
pub/DSP/Kaiser.ma.Z The Kaiser window
pub/DSP/WinFlt.ma.Z Digital filter design by the "window method"
(There are other DSP related items in pub/DSP on ccrma-ftp; see other
sections of this FAQ for details).
--------------------------------------------------
Q1.2.9: What is the Linear Systems Toolbox for Maple?
Where can I get it?
Package: Linear systems toolbox for Maple.
Description: Public domain extension to Maple.
Contact: Tony Richardson, amr@egr.duke.edu.
To obtain: anonymous ftp to cameron.egr.duke.edu, file pub/maple/linsys.tar.Z.
--------------------------------------------------
Q1.2.10: Where can I get text to speech conversion software?
Free (but not public domain) text to speech conversion software is
available via anonymous ftp from wilma.cs.brown.edu in the pub directory
as speak.tar.Z. It will compile and run on a SPARC's built-in audio
after modifying speak.c with the path of your libaudio.h (e.g.,
/usr/demo/SOUND/libaudio.h). It's a simple phoneme concatenation
system with commensurate synthesized speech quality (a directory of
phoneme audio files is included). [Joe Campbell, jpcampb@afterlife.ncsc.mil]
=============================================================================
2. Algorithms and standards.
This section deals with DSP algorithms and related standards.
=======================================================================
Q2.1: Where can I get some algorithms for general DSP?
The following archives contain things such as matrix operations, FFT's and
generally useful things like that, as opposed to complete applications:
(1) host ux1.cso.uiuc.edu - log in as anonymous, get the file math/README.
It summarises the contents of the archive.
(2) Netlib, which serves some of this software via email. Try mail to
netlib@ORNL.GOV with "send help" in the subject field.
For Europe:
Internet: netlib@nac.no
EARN/BITNET: netlib%nac.no@norunix.bitnet
X.400: s=netlib; o=nac; c=no;
EUNET/uucp: nac!netlib
For the Pacific, try
netlib@draci.cs.uow.edu.au
For background about netlib, see Jack J. Dongarra and Eric Grosse,
"Distribution of Mathematical Software Via Electronic Mail,"
Comm. ACM (1987) 30,403--407.
A similar collection of statistical software is available from
statlib@temper.stat.cmu.edu.
The symbolic algebra system REDUCE is supported by
reduce-netlib@rand.org.
(3) It may be possible to get an extensive set of fortran routines
produced by the Naval Surface Warfare Centre. { Any one got more data? }
If you don't know where to find what you're after, try archie.
=======================================================================
Q2.2: What are CELP and LPC? Where can I get the source for CELP and LPC?
CELP stands for "code excited linear prediction". LPC stands for
"linear predictive coding". They are compression algorithms used for
low bit rate (2400 and 4800 bps) speech coding.
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 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)
Example input and processed speech files, a technical information bulletin,
and the official standard "Federal Standard 1016, Telecommunications:
Analog to Digital Conversion of Radio Voice by 4,800 bit/second Code
Excited Linear Prediction (CELP)" are included at no charge.
The following article describes the Federal-Standard-1016 4.8-kbps CELP coder:
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.
The U.S. DoD's Federal-Standard-1015/NATO-STANAG-4198 based 2400 bps
linear prediction coder version 53 (LPC-10e v53) Fortran or C simulation
source codes are available on a limited basis upon written request to:
Tom Tremain
Department of Defense
Ft. Meade, MD 20755-6000
USA
The U.S. Federal Standard 1015 (NATO STANAG 4198) is described in:
Thomas E. Tremain, "The Government Standard Linear Predictive Coding
Algorithm: LPC-10," Speech Technology Magazine, April 1982, p. 40-49.
Copies of the official standards FS 1015 and FS 1016 are available for
US $2.50 each from:
GSA Rm 6654
7th & D St SW
Washington, D.C. 20407
1-202-708-9205
Realtime DSP code for FS-1015 and FS-1016 is sold by:
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 FS-1016 code can run on a DSP Research's Tiger 30
or on Intellibit's AE2000 TMS320C31 based 3" by 2.5" card. See section 4.1
for more on these cards.
[Most of the above from Joe Campbell, jpcampb@afterlife.ncsc.mil]
=======================================================================
Q2.3: How does pitch perception work, and how do I implement it on my DSP chip?
Pitch is officially defined as "That attribute of auditory sensation
in terms of which sounds may be ordered on a musical scale." Several
good examples illustrating the subtleties of pitch perception are
included in the "Auditory Demonstrations CD" which is available from
the Acoustical Society of America, Woodbury, NY 10797 for $20.
A good general reference about the psychology of pitch perception is
the book:
B.C.J. Moore, "An Introduction to the Psychology of Hearing",
Academic Press, London, 1989.
This book is available in paperback and makes a good desk reference.
An algorithm implementation that matches a large body of psychoacoustical
work, but which is computationally very intensive, is presented in the paper:
Malcolm Slaney and Richard Lyon, "A Perceptual Pitch Detector,"
Proceedings of the International Conference of Acoustics, Speech,
and Signal Processing, 1990, Albuquerque, New Mexico.
The definitive papers describing the use of such a perceptual pitch
detector as applied to the classical pitch literature is in:
Ray Meddis and M. J. Hewitt. "Virtual pitch and phase
sensitivity of a computer model of the auditory periphery. "
Journal of the Acoustical Society of America 89 (6 1991): 2866-2682.
and 2883-2894.
The current work that argues for a pure spectral method starts with the work
of Goldstein:
J. Goldstein, "An optimum processor theory for the
central formation of the pitch of complex tones," Journal
of the Acoustical Society of America 54, 1496-1516, 1973.
Two approaches are worth considering if something approximating pitch
is appropriate. The people at IRCAM have proposed a harmonic analysis
approach that can be implemented on a DSP
Boris Doval and Xavier Rodet, "Estimation of Fundamental Frequency
of Musical Sound Signals," Proceedings of the 1991 International
Conference on Acoustics, Speech, and Signal Processing, Toronto,
Volume 5, pp. 3657-3660.
The classic paper for time domain (peak picking) pitch algorithms is:
B. Gold and L. Rabiner, "Parallel processing techniques for estimating
pitch periods of speech in the time domain," Journal of the Acoustical
Society of America, 46, pp 441-448, 1969.
Finally, a word of caution: Pitch is not single-valued. We can hear a
sound and match it to several different pitches. Imagine the number
of instruments in an orchestra, each with its own pitch. Even a
single sound can have more than one pitch. See for example
Demonstration 27 from the ASA Auditory Demonstrations CD.
[The above from Malcolm Slaney, Apple Computer, and John Lazzaro,
U.C. Berkeley.]
=======================================================================
Q2.4: What standards are there for digital audio? What is AES/EBU?
What is S/P-DIF?
The "AES/EBU" (Audio Engineering Society / European Broadcast Union)
digital audio standard is probably the most popular digital audio
standard today. Most consumer and professional digital audio devices
(CD players, DAT decks, etc.) that feature digital audio I/O support
AES/EBU.
AES/EBU is a bit-serial communications protocol for transmitting
digital audio data through a single transmission line. It provides two
channels of audio data, a method for communication control and status
information ("channel status bits"), and some error detection
capabilities. Clocking information (i.e., sample rate) is derived
from the AES/EBU bit stream, and is thus controlled by the transmitter.
The standard mandates use of 32 kHz, 44.1 kHz, or 48 kHz sample rates,
but some interfaces can be made to work at other sample rates.
AES/EBU provides both "professional" and "consumer" modes. The big
difference is in the format of the channel status bits mentioned above.
The professional mode bits include alphanumeric channel origin and
destination data, time of day codes, sample number codes, word length,
and other goodies. The consumer mode bits have much less information,
but do include information on copy protection (naturally).
There physical connection media are commonly used with AES/EBU:
balanced (differential), using two wires and shield in three-wire microphone
cable with XLR connectors; unbalanced (single-ended), using audio coax cable
with RCA jacks; and optical (via fiber optics).
"S/P-DIF" (Sony/Philips Digital Interface Format) typically refers to
AES/EBU operated in consumer mode over unbalanced RCA cable. Note
that S/P-DIF and AES/EBU mean different things depending on how much
of a purist you are in the digital audio world; see the Finger article
below.
References:
Finger, Robert, "AES3-199X: The Revised Two Channel Digital Audio
Interface (DRAFT)", presented at the 91st Convention of the Audio
Engineering Society, October 4-8, 1991. Reprints: AES, 60 East 42nd
St., New York, NY, 10165.
[The above from Phil Lapsley, phil@ohm.Berkeley.EDU]
=============================================================================
Q2.5: What is mu-law encoding? Where can I get source for it?
Mu-law (also "u-law") encoding is a form of logarithmic quantization
or companding. It's based on the observation that many signals are
statistically more likely to be near a low signal level than a high
signal level. Therefore, it makes more sense to have more quantization
points near a low level than a high level. In a typical mu-law system,
linear samples of 14 to 16 bits are companded to 8 bits. Most telephone
quality codecs (including the Sparcstation's audio codec) use mu-law
encoded samples.
Desktop Sparc machines come with routines to convert between linear and
mu-law samples. On a desktop Sparc, see the man page for audio_ulaw2linear
in /usr/demo/SOUND/man.
Craig Reese posted the source of similar routines to comp.dsp in August '92.
References:
CCITT Recommendation G.711 (very difficult to follow).
Michael Villeret, et. al, "A New Digital Technique for Implementation
of Any Continuous PCM Companding Law,", IEEE Int. Conf. on Communications,
1973, vol. 1, pp. 11.12-11.17.
MIL-STD-188-113, "Interoperability and Performance Standards
for Analog-to-Digital Conversion Techniques," 17 February 1987.
"TI Digital Signal Processing Applications with the TMS320 Family",
pp. 169-198.
[From Joe Campbell; Craig Reese, cfreese@super.org; Sepehr Mehrabanzad,
sepehr@falstaff.dev.cdx.mot.com]
=============================================================================
Q2.6: How can I do CD <-> DAT sample rate conversion?
CD players use a 44.1 kHz sample rate, whereas DAT uses a 48 kHz sample rate.
This means that you must do sample rate conversion before you can get data
from a CD player directly into a DAT deck.
[From Ed Hall, edhall@rand.org:]
For a start, look at "Multirate Digital Signal Processing" by Crochiere
and Rabiner (see FAQ section 1.1).
Almost any technique for producing good digital low-pass filters will be
adaptable to sample-rate conversion. 44.1:48 and vice-versa is pretty
hairy, though, because the lowest whole-number ratio is 147:160. To do
all that in one go would require a FIR with thousands of coefficients,
of which only 1/147th or 1/160th are used for each sample--the real
problem is memory, not CPU for most DSP chips. You could chain several
interpolators and decimators, as suggested by factoring the ratio into
3*7*7:2*2*2*2*2*5. This adds complexity, but reduces the number of
coefficients required by a considerable amount.
In any case, your local DSP guru will probably be able to suggest a good
program for designing digital filters (this is a good general question
for the net, anyway). This is one case where going beyond the simpler
windowed-sinc-based approaches might pay off (and I'm afraid I can't
recommend any readily available programs myself).
=============================================================================
3. Programmable DSP chips and software.
This section deals with programmable DSP chips and their software.
Q3.1: What are the available DSP chips and chip architectures?
{ This is based on a woefully inadequate databook collection. Anyone want
to add to this list? Manufacturers want to submit anything? }
The "big four" programmable DSP chip manufacturers are Texas Instruments,
with the TMS320 series of chips; Motorola, with the DSP56000 and DSP96000
series; AT&T, with the DSP16 and DSP32 series; and Analog Devices, with
the ADSP2100 series. Here's a chip breakdown by manufacturer:
-------------------------------------
Texas Instuments:
TMS320C1x: family of low cost fixed-point DSP's; 16 bit data, 32 bit
registers; Various RAM&ROM configurations; 16 bit I/O bus, serial ports.
TMS320C25: 50MHz fixed-point DSP; 16 bit data, 32 bit registers;
12.5 MIPS @ 50MHz.
TMS320C30: 27/33/40 MHz floating point DSP; 32 bit floating point,
24 bit fixed point data, 40 bit registers; DMA controller; dual serial
ports; some support for multi-processor arrays.
TMS320C31: version of C30 minus peripheral bus, one serial port, and the 4Kx32
internal ROM. ~$20, 132 pin PQFP.
TMS320C40: 40/50 MHz floating point DSP; extensive parallel processing
support through 6 buffered byte-wide 20 Mb/s links and 6 channel DMA; cache.
TMS320C50: enhanced TMS320C25 (double throughput); low overhead looping;
10 Kwords SRAM on chip.
-------------------------------------
Motorola:
DSP56001: 20.5, 27, or 32 MHz fixed point DSP. 24 bit data bus, 16 bit
address bus, 56 bit accumulators (2), host interface port, serial ports (2),
general purpose I/O pins, timer. Harvard architecture. 512 words program
RAM, 512 words data RAM on chip.
DSP56000: Mask-programmed version of DSP56001.
DSP56002: DSP56001 with On-Chip Emulation (OnCE) debug port and clock PLL.
Also has a four cycle double precision multiply and support for block
floating point. Available up to 40 MHz.
DSP56156: 40, 50, or 60 MHz fixed point DSP; 16 bit data bus, 40 bit
accumulators (2), host interface port, serial ports (2), timer, OnCE
debug port, clock PLL, 14 bit sigma-delta voice band CODEC, 2K words
program RAM, 2K words data RAM on chip.
DSP96002: IEEE format floating point DSP; 32 bit data and address bus, two
complete external buses; Harvard architecture.
-------------------------------------
AT&T:
DSP32C: floating point DSP; 32 bit floating point, 16/24 bit fixed point data.
DSP3210: floating point DSP; 32 bit floating point, 16/32 bit fixed point data;
32 bit address and data bus, serial port.
[and others; we don't have a good list, unfortunately].
-------------------------------------
Analog Devices:
ADSP2100: 32 and 50Mhz fixed point DSP (8 MIPS, 12.5MIPS). 16 bit registers
except for multiplyer-accumulate register which is 40 bits. No on chip memory
except for a 16 word instruction cache.
ADSP2101: Derived from ADSP2100, 16 bit registers except for the multiplier
accumulator which is 40 bits. 2Kx24 instruction/data ram in program memory
space, 1Kx16 data ram in data memory space. Adds memory, timer, serial ports,
etc. to the 2100. Fastest speed grade in production is 16.6 MHz (16.6MIPS).
ADSP2102: Ram/rom version of 2101; user selects how much of the 2kx24 program
memory is mask rom.
ADSP2103: 3V version of the 2101.
ADSP2105: 10Mhz fixed point DSP with 1 serial port, timer and 1kx24
instruction/data ram in program memory space, and 512 word data ram
in data memory space. This processor sells for US $9.90 in any quantity.
ADSP2111: adds a 8/16bit host interface port [to 2101?].
ADSP21msp50: ADSP2111 with an on chip a/d and d/a interface and additional
low power modes.
ADSP2161: has 8Kx24 mask rom.
DSP21020: 20/25/33 MHz floating-point DSP; Supports 32-bit fixed point, IEEE
format 32-bit floating point, and 40-bit floating point; 40-bit registers plus two 80-bit fixed-point multiply-accumulators; Harvard arch. with 32 word
instruction cache allows two data accesses in a single cycle; IEEE 1149.1 JTAG boundry scan; 33.3 MIPS @ 33.3 MHz.
ADSP21010: Slower and cheaper version of '020 (16 MHz). Limited to 32-bit
fixed and floating point.
All of the processors (except the 2100) use a 1X instruction clock and use an
on chip PLL to generate an internal 4X clock. All processors have an extended
Harvard architecture which allows two data fetches and an instruction fetch
every cycle in parallel with an alu or mac operation. All instructions
including accessing external memory can complete in 1 cycle.
[Greg Koker, greg.koker@analog.com]
=======================================================================
Q3.2: Software for Motorola DSPs.
=======================================================================
Q3.2.1: Where can I get a free assembler for the Motorola DSP56000?
A free assembler for the Motorola DSP56000 exists, thanks to Quinn
Jensen, jensenq@qcj.icon.com. The current version is 1.1, and
it is posted to alt.sources, so look for it on mirrors of that
newsgroup (like wuarchive.wustl.edu).
=======================================================================
Q3.2.2: Where can I get a free C compiler for the Motorola DSP56000?
There are two separate compiler sources for the Motorola DSP56000. One
is the port of gcc 1.40 done by Andrew Sterian (asterian@eecs.umich.edu) and
the other is a port of gcc 1.37.1 done by Motorola and returned to the
FSF. Andrew's port has bowed to Motorola's version. Both may be
portable to gcc2.x.x with some effort required. Neither of these comes
with an assembler, but you can get a free DSP56000 assembler elsewhere
(see Q3.2.1 above).
The Motorola gcc source is available for FTP from:
nic.funet.fi ~pub/ham/dsp/dsp56k-tools/dsp56k-gcc.tar.Z
evans.ee.adfa.oz.au pub/micros/56k/g56k.tar.Z
From Andrew Sterian, asterian@eecs.umich.edu:
My DSP56156 port is still the only DSP56156 compiler around and I have
just released an updated version of it. Both this compiler and the
previous incarnation are archived on wuarchive.wustl.edu (in the
usenet/alt.sources directory) amongst other places.
=======================================================================
Q3.2.3: Where can I get algorithms and libraries for Motorola DSPs?
What is the number for the Motorola DSP BBS?
Motorola runs "Dr. Bub", a bulletin board for DSPs containing source code
for various libraries and algorithms. You can call it at (512) 891-3771
(9600, 4800, 2400, 1200 bps) or (512) 891-3773 (2400/1200/300 bps).
Format is 8 data bits, no parity, 1 stop bit). Log in as "guest" to
browse the system, or you can open an account by entering "new" at the
account name prompt. [John Fisher, johnf@dsp.sps.mot.com]
Alternatively, Dr. BuB is mirrored on the following sites:
calvin.stanford.edu (36.14.0.43) in /motorola
bode.ee.ualberta.ca (129.128.16.96) in /pub/dos/motorola
nic.funet.fi (128.214.6.100) in /pub/misc/motorola
doc.ic.ac.uk (146.169.3.7) in
/computing/systems/motorola/digital-signal-processing/dr.bub.sources
Also try nic.funet.fi in /pub/ham/dsp for a lot of good stuff on
communications uses, including some hardware.
ccrma-ftp.stanford.edu also has a variety of DSP code (much of it NeXT
specific, see below), including the following for the DSP56000:
pub/clm.tar.Z "CLM", a package aimed mainly at composers doing
computer music in Common Lisp, but includes a Lisp
56000 assembler, debugger, loader, large libraries of
DSP56000 routines useful in computer music, and
a compiler from a subset of Common Lisp to
DSP56000 code. [bil@ccrma.stanford.edu]
=======================================================================
Q3.2.4: Where can I get NeXT-compatible Motorola DSP56001 code?
Try the following from ccrma-ftp.Stanford.EDU:
DSP programs for the NeXT platform:
pub/DSP/resample.tar.Z Audio sampling-rate conversion and FIR
filter design.
pub/DSP/ResoLab2.1.tar.Z Interactive filter instrument; sources now
included, online help.
pub/DSP/Spectro.Z Spectrum analysis tool, with source code.
pub/DSP/WaveFormEditor.tar.Z Jean Laroche's real-time waveform editor,
with DAJ's additions.
DSP programming examples for the NeXT platform:
pub/DSP/dsp_dma_stream.tar.Z Fast DSP DMA programming example (two-way DMA).
pub/DSP/JeanLaroche.tar.Z Low-level sound and DSP programming examples
and docs.
[bil@ccrma.Stanford.EDU]
=======================================================================
Q3.3: Software for Texas Instruments DSPs.
=======================================================================
Q3.3.1: Where can I get algorithms or libraries for TI DSPs?
What is the number for the TI DSP BBS?
nic.funet.fi has some old, apparently public domain, assembler and
related tools from TI for the TMS320 family. [Antti-Pekka Virtanen,
antsu@utu.fu]
The TI DSP bulletin board is at (713) 274-2323 (300, 1200, 2400, or 9600 bps;
8 data, 1 stop, no parity).
evans.ee.adfa.oz.au has a mirror of the TI DSP bulletin board in
"mirrors/tibbs". See the "00README" file at the top of the
directory tree for info. Please restrict FTP session to outside of
8 am to 6 pm local time (10 pm to 8 am GMT). [Brad Hards,
hards4@ee.adfa.oz.au]
{ If anyone knows of any other sources for TI DSP software, please let
us know at comp-dsp-faq@ohm.Berkeley.EDU. Thanks! }
=======================================================================
Q3.3.2: Where can I get a free C compiler for the TI TMS320C30?
Sonitech (see vendors list) has a gcc based TMS320C30 C compiler
that was originally done Computer Motion. Sonitech sells it
for $995, but under the terms of the Gnu Public License, other
people can then give it away. While we haven't heard of any
ftp sites yet, there are bound to be some soon.
=============================================================================
Questions, comments, or submissions for this FAQ should be mailed to
comp-dsp-faq@ohm.Berkeley.EDU, ...!ucbvax!ohm!comp-dsp-faq. Thanks!
comp.dsp FAQ [2 of 2]
Author: Phil Lapsley
Date: Sun, 11 Oct 1992 17:36
Date: Sun, 11 Oct 1992 17:36
1079 lines
36050 bytes
36050 bytes
Archive-name: dsp-faq/part2
Last-modified: Sun Oct 11 1992
Version: 0.5
4. Hardware.
This section deals with DSP hardware, including boards, peripherals, and
some peripheral chips. Most of this information comes from:
Phil Lapsley (phil@rivetjoint.lapcon.com)
David Pepper (dpepper@thumper.bellcore.com)
Malachy Devlin (madmal@spd.eee.strathclyde.ac.uk)
Paul Russell (paulr@syma.sussex.ac.uk)
Steve Haehnichen (vigra!calvin!steve@UCSD.EDU)
Josh A. Kablotsky (joshua.kablotsky@analog.com)
Len May (len.may@cygnus.spd.analog.com)
Steve Sidman (sidman@sharpwa.com)
Q4.1: DSP development boards.
Note: This information was mainly supplied by some vendor catalogues I had.
This information is in no way definitive, and much of the information may
well be out of date or simply wrong.
Q4.1.1: IBM PC DSP development boards.
IBM PC boards, Analog Devices processors:
----------------------------------------------------------------------------
Board Name: ADSP-2101 LAB-DSP
Type of Board: ADSP-2101 or ADSP-2105 IBM PC/AT XT
Company: Computer Continuum
DSP processor: ADSP 2101 or ADSP 2105
Features: Shared memory between PC and DSP. Serial I/O. Daughter board.
Board Name: ADSP-2100 System board
Type of Board: ADSP-2100A IBM PC card
Company: Loughborough Sound Images
DSP Processor: ADSP-2100A 40 MHz 16K words RAM
Analog I/O: 12 bit 125 kHz A/D, D/A
Board Name: ADSP-2101 System board
Type of Board: ADSP-2101 IBM PC card
Company: Loughborough Sound Images
DSP Processor: ADSP-2101 12.5 MHz, 8K words RAM
Analog I/O: A/D -- D/A: dual 14 bit 19.2 kHz CODECs (TI TLC32044Cs)
Comments: 32Kx8 EPROM socket allows some standalone behavior
Board Name: ADSP-2101 DSPB 2101-4
Type of Board: Four processor ADSP-2101 IBM PC AT board
Company: CMS GmbH
DSP processor: 4x ADSP 2101
Analog I/O: 2 16 bit A/Ds per processor.
Board Name: Feature Finder ADSP-2105
Type of Board: ADSP-2105 frame grabber for IBM PC
Company: Current Technology, Inc.
DSP processor: ADSP 2101
Features: RS-170 video interface, 512x512 video memory, feature extraction s/w
Board Name: LAB2105 DSP Card
Type of Board: ADSP-2105 board for IBM PC
Company: EnterTec, Inc.
DSP Processor: ADSP-2105
Analog I/O: Codec with microphone input and headphone output.
Board Name: ADSP-2105 DSP Platform
Type of Board: Dual ADSP-2105 or ADSP-2101 IBM PC board
Company: Hollis Electronics
DSP Processor: 2x ADSP-2105 (or ADSP-2101s)
Analog I/O: 2 14 bit D/A, 2 12 bit A/D
Features: 2x RS-232 UARTs, real-time clock, 2x 16 bit timers, 4 char LED
Board Name: ADSP-2100 DX2100
Type of Board: ADSP 2100 (?) IBM PC board
Company: Logabex
DSP Processor: ADSP-2100 (?)
Board Name: GODSPEED (ADSP-2101)
Type of Board: ADSP-2101 IBM PC board
Company: Prime Ideal
DSP Processor: ADSP-2101, dual-port RAM to PC bus
Analog I/O: 48 kHz codec w/ speaker and mic connectors
Board Name: ADSP-2105 Espresso Board
Type of Board: ADSP-2105 IBM PC XT/AT board
Company: Saddle Point Systems
DSP Processor: ADSP-2105 or ADSP-2101, 28K words memory.
Analog I/O: on board codec
Board Name: ADSP-2101 SPB2
Type of Board: Dual ADSP-2101 IBM PC AT board
Company: Signal-Data
DSP Processor: 2x ADSP-2101s, 32Kw RAM/proc, 8Kw ROM/proc.
Analog I/O: 12 bit A/D, 12 bit D/A on one processor
Board Name: PC-1601A, DSPS-2601
Type of Board: ADSP-2101 IBM PC board (?)
Company: Wavetron Microsystems
Comments: DSPS-2601 is a multi-channel version. (?)
Board Name: ADSP-21020 System Board
Type of Board: ADSP-21020 IBM PC AT board
Company: Loughborough Sound Images
DSP Processor: ADSP-21020, 160 Kw program RAM, 160 Kw data RAM
Analog I/O: dual 16 bit analog I/O daughter card option.
Features: Interval timer.
Board Name: GAMMA 20/25
Type of Board: ADSP-21020 IBM PC AT board
Company: BittWare Research Systems, Inc.
DSP Processor: DSP-21020 25 MHz, 32K or 128K RAM
Analog I/O: duaghter card available
Features: DT-connect interface, mezzanine bus for daughter cards
IBM PC boards, AT&T processors:
----------------------------------------------------------------------------
Board Name: AT-DSP2200
Type of Board: AT&T DSP-32C IBM PC-AT card
Company: National Instruments (800) 433-3488
DSP Processor: DSP-32C
Analog I/O: 16 bit sigma-delta A/D, D/A
Features: 16 bit real-time system integration (RTSI) peripheral bus interface.
Board Name: DSP-32C
Type of Board: AT&T DSP-32C IBM PC-AT card
Company: Ariel Corp (908) 249-2900
DSP Processor: DSP-32C
Board Name: DSP32C System board
Type of Board: DSP32C IBM PC AT card
Company: Loughborough Sound Images
DSP Processor: DSP32C 50 MHz, 40K words RAM
Analog I/O: dual 16 bit 153 kHz A/D, D/A (Burr Brown PCM78 & PCM56)
Comments: "DSP32 Processor board" is as above, but without analog I/O.
Instead it has a wire wrap prototyping area.
Board Name: DSP32C Telephony Board
Type of Board: DSP32C IBM PC AT card
Company: Loughborough Sound Images
DSP Processor: DSP32C 50 MHz, 40K words RAM
Analog I/O: AT&T 7525 CODEC
Features: 4 line telephone interface with opto-isolated ring detector in
either US or UK configuration.
IBM PC boards, Motorola DSP56000 processors:
----------------------------------------------------------------------------
Board Name: DSP-56
Type of Board: DSP56001 IBM PC AT card
Company: Ariel Corp (908) 249-2900
DSP Processor: 27 (?) MHz DSP56001
Analog I/O: dual 16 bit 100 kHz A/D, D/A
Features: DSPnet parallel interface, SCSI interface, async serial interface
Board Name: PC-56
Type of Board: DSP56001 IBM PC AT card
Company: Ariel Corp (908) 249-2900
DSP Processor: 27 MHz 56k with 16K or 64K words RAM
Analog I/O: optional 14 bit single channel analog I/O.
Board Name: Cheetah mother board
Type of Board: DSP96002/dual DSP56001 IBM PC AT card
Company: Atlanta Signal Processors, Inc. (ASPI) (404) 892-7265
DSP Processor: DSP96002 33 MHz, 256k-2M bytes RAM, dual DSP56001s 20 MHz
Features: serial interfaces.
Board Name: DSP56001 Application Development System (ADS)
Type of Board: DSP56001 board for IBM PC
Company: Motorola Corp. (512) 891-2030
DSP Processor: DSP56001
Comments: Motorola produce DSP56000 assembler, linker, simulator, C compiler.
This is an external board that interfaces to a variety of hosts, including
the IBM PC, via host-specific adaptor cards.
Board Name: DSP56001 System board
Type of Board: DSP56001 IBM PC card
Company: Loughborough Sound Images
DSP Processor: DSP56001 20Mhz 192K words RAM
Analog I/O: two 16 bit 153 kHz A/D w/ 3rd order analog filters,
two 16 bit D/A w/ 3rd order analog filters, telephony codec
Comments: "DSP56001 Processor board" is same, but without analog I/O
Board Name: Dual DSP56001 Processor board
Type of Board: two processor DSP56001 IBM PC card
Company: Loughborough Sound Images
DSP Processor: 27 MHz 56k, 32K words RAM per CPU
Interface: Two ADS ports, each processor has RS422 or SLD ISDN
Comments: 2Kx16 bit dual port RAM between host and each processor,
2Kx24 bit dual port RAM between 56ks
IBM PC boards, Motorola DSP56116 processor:
----------------------------------------------------------------------------
Board Name: DSP56116 System board
Type of Board: DSP56116 IBM PC AT card
Company: Spectrum Signal Processing (604) 438-7266
DSP Processor: DSP56116 80? MHz, 30K words RAM,
Analog I/O: two CODECs attached to 56116 serial ports
IBM PC boards, Motorola DSP96000 processor:
----------------------------------------------------------------------------
Board Name: MM-96
Type of Board: Two processor DSP96002 IBM PC AT card
Company: Ariel Corp (908) 249-2900
DSP Processor: 2x DSP96002
Board Name: DSP96002 Application Development System (ADS)
Type of Board: DSP96002 board for IBM PC
Company: Motorola Corp. (512) 891-2030
DSP Processor: DSP96002
Comments: This is an external board that interfaces to a variety of hosts,
including the IBM PC, via host-specific adaptor cards.
Board Name: DSP96002 System board
Type of Board: DSP96002 IBM PC card
Company: Loughborough Sound Images
DSP Processor: DSP96002 33 MHz , 64Kword 0ws RAM + 256Kword 1ws RAM
Analog I/O: dual 16 bit 100 kHz A/D converters (Motorola 56ADC16s)
IBM PC boards, Texas Instruments TMS320 processors:
----------------------------------------------------------------------------
Board Name: DSP-16+
Type of Board: TMS320C25 IBM PC AT card
Company: Ariel Corp (908) 249-2900
DSP Processor: 40 MHz 320C25
Analog I/O: two channel 16 bit 50 kHz A/D, D/A.
Board Name: Model 250 DSP board
Type of Board: TMS320C25 board for IBM PC AT
Company: Dalanco Spry
DSP Processor: TMS320C25 40 MHz, 4K words program RAM(64K optional),
32K words data RAM (128K optional),
Analog I/O: 12 bit 300 kHz A/D, dual 12 bit 250 kHz D/A
Features: 16 bit expansion bus, serial port
Comments: Program RAM is zero-wait state, data RAM is one wait state.
Board Name: Tiger 30
Type of Board: TMS320C30 board for IBM PC
Company: DSP Research
DSP Processor: TMS320C30
Board Name: Banshee mother board
Type of Board: TMS320C30 IBM PC AT card
Company: Atlanta Signal Processors, Inc. (ASPI) (404) 892-7265
DSP Processor: TMS320C30 33 MHz, 256k-512k bytes RAM
Analog I/O: 16 bit 200 kHZ A/D, D/A available via optional boards.
Comments: Optional boards allow multiple Banshee boards to be connected,
provide extra memory, and provide analog I/O.
Board Name: Chimera system
Type of Board: TMS320C25 or TMS320C26 IBM PC AT card
Company: Atlanta Signal Processors, Inc. (ASPI) (404) 892-7265
DSP Processor: TMS320C25/TMS320C26, 40/50 MHz, 4K-64K words RAM
Analog I/O: optional 16 bit 200 kHz A/D, D/A is optional via daughter card.
Type of Board: PC board with TMS32010
Company: Natural Microsystems Corp. (800) 533-6120
DSP Processor: TMS32010
Board Name: TMS320C25 System board
Type of Board: TMS320C25 IBM PC card
Company: Loughborough Sound Images
DSP Processor: TMS320C25 40 or 50 MHz 16K words RAM
Analog I/O: 1 channel 16 bit 54 kHZ A/D, D/A (100 kHz 12 bit)
Comments: "TMS320C25 Processor board" is as above, but without analog I/O
Board Name: TMS320C25 Data Acquisition Processor
Type of Board: TMS320C25 IBM PC card
Company: Loughborough Sound Images
DSP Processor: TMS320C25 40 MHz, 64K words program RAM, 64K words data RAM,
256K words buffer RAM
Features: Has buffer management unit, handling circular buffer management,
multiple data channel support, data compare functions, sample counter.
Board Name: TMS320C30 System board
Type of Board: TMS320C30 IBM PC AT card
Company: Loughborough Sound Images
DSP Processor: TMS320C30 33 MHz, 64K words RAM
Analog I/O: 2x 16 bit A/D (Burr Brown PCM78), 2x 16 bit D/A (Burr Brown PCM56)
Comments: "TMS320C30 Processor board" is as above, but without analog I/O and
has instead a prototyping area.
Board Name: TMS320C50 System board
Type of Board: TMS320C50 IBM PC AT card
Company: Loughborough Sound Images
DSP Processor: TMS320C50 50 MHz 32K words RAM
Features: 65sq cm wire wrap area.
Board Name: TMS320C1x Development System
Type of Board: IBM PC card
Company: Loughborough Sound Images
DSP Processor: TMS320C14
Comments: Integrated emulation and programming system.
Board Name: TMS320C40 Parallel DSP System
Type of Board: IBM PC/AT card
Company: Loughborough Sound Images
DSP Processor: 2 TMS320C40 50 Mhz 64K words RAM
Analog I/O: Daughtercard expansion socketing.
Comments: Uses TIM-40 compatible modules
IBM PC boards, other processors:
----------------------------------------------------------------------------
Board Name: PDSP16488 Imaging/Graphics board
Type of Board: PDSP-16488 IBM PC card
Company: Spectrum Signal Processing (604) 438-7266
DSP Processor: PDSP-16488
Q4.1.2: Mac Nubus DSP development boards.
Mac Nubus boards, AT&T processors:
----------------------------------------------------------------------------
Board Name: MacDSP MB/A
Type of Board: DSP32C Apple Mac NuBus board
Company: Spectral Innovations (408) 727-1314
Price: $3495-$4995
DSP Processor: DSP32C 60 MHz DSP with up to 1 Mbyte SRAM
Comments: Optional 12 bit A/D card at 16 bit A/D, D/A with 1,2 or 8 channels
Mac Nubus boards, Motorola DSP56000 processor:
----------------------------------------------------------------------------
Board Name: MAC-56
Type of Board: Macintosh NuBus DSP56001 card
Company: Ariel Corp. (908) 249-2900
DSP Processor: 56001 with 48-192K words RAM
Comments: Comes with DSPworks software
Name of Board: DSP56001 Application Development System (ADS)
Type of Board: DSP56001 board for Mac II
Company: Motorola Corp. (512) 891-2030
DSP Processor: DSP56001
Comments: This is an external board that interfaces to a variety of hosts,
including the Mac, via host-specific adaptor cards.
Board Name: AudioMedia II
Type of Board: Macintosh NuBus DSP56001 card
Company: DigiDesign Inc. (415) 688-0600
DSP Processor: 56001 @ 33.87 MHz with 8/4/4 K words P/X/Y RAM
Analog I/O: stereo 16 bit 44.1/48 kHz A/D, D/A (?)
Features: SPDIF I/O. Supported by DSP Designer software from Zola
Technologies Inc.
Board Name: Sound Accelerator II
Type of Board: Macintosh NuBus DSP56001 card
Company: DigiDesign Inc. (415) 688-0600
DSP Processor: 56001 @ 33.87 MHz with 8/16/16 K words P/X/Y RAM
Features: Optional digital/analogue audio I/O unit available. Supported by
DSP Designer software from Zola Technologies Inc.
Board Name: Pro Tools
Type of Board: Macintosh NuBus 2 x DSP56001 card
Company: DigiDesign Inc. (415) 688-0600
DSP Processor: 2 x 56001 32 MHz, 8/16/16 K words P/X/Y RAM each
Features: Optional digital/analogue audio I/O unit available.
Supported by DSP Designer software from Zola Technologies Inc.
Mac Nubus boards, Motorola DSP96000 processor:
----------------------------------------------------------------------------
Board Name: DSP96002 Application Development System (ADS)
Type of Board: DSP96002 board for Mac II
Company: Motorola Corp. (512) 891-2030
DSP Processor: DSP96002
Comments: This is an external board that interfaces to a variety of hosts,
including the Mac, via host-specific adaptor cards.
Mac Nubus boards, Texas Instruments processors:
----------------------------------------------------------------------------
Board Name: NB-DSP2300, 2301, 2305
Type of Board: TMS320C30 board for Mac NuBus
Company: National Instruments (800) 433-3488
DSP Processor: TMS32C30 at 33 (2300), 27 (2301), or 40 (2305) MHz.,
64K or 320K of memory, TMS320C30 to IEEE 754 translator hardware.
Features: 16 bit "real time system integration" (RTSI) peripheral bus.
Q4.1.3: What are some SBus DSP development boards?
SBus boards, AT&T processors:
----------------------------------------------------------------------------
Board Name: S-32C
Type of Board: SBus Accelerator Board
Company: Ariel
Price: $2,995 ($5,795 with C compiler)
Availability: Orders being taken now.
DSP Processor: AT&T DSP-32C 50MHz, 256 Kbytes to 4 Mbytes SRAM
Analog I/O: Interfaces with Ariel's ProPort & Digital Microphone
(DM-N $595.00; ProPort = $1,295)
Comments: The ProPort is a dual channel 16-bit A/D, 20 bit D/A add on box
which has 7 crystal controlled sample rates from 8 to 96 kHz (including 48,
44.1, & 32). This device is in a separate box which attaches to the
"NeXT compatible port" on the board. Entropic is porting Waves+ to this board.
Board Name: MAXCOM Multimedia Processor
Type of Board: Dual DSP3210 Sbus card
Company: KINETICSYSTEMS
DSP Processor: Dual DSP3210
Analog I/O: multimedia audio codec and a telephone quality codec.
Comments: Complete ATT DSP board using real-time operating system (VCOS) and
ATT Multimedia Module Library to provide functions for V.29/V.32 data/fax
modems, speech recognition/synthesis, etc.
SBus boards, Motorola DSP56000 processor:
----------------------------------------------------------------------------
Board Name: S-56X
Type of Board: SBus Accelerator Board
Company: Ariel (board was designed by Berkeley Camera Engineering)
Price: $2,495 / $2,995
Availability: Now
DSP Processor: Motorola DSP56001 27 or 32 MHz, 32 Kw RAM
Analog I/O: Digital Microphone, ProPort (see above) or AES/EBU
Features: DMA controller, Xilinx 3042 gate array for special purpose I/O.
(1.2 Mby/sec transfer rate using the S-56X, w/ ~3ms latency at DMA page
boundaries).
Board Name: VS-30
Type of Board: SBus Dual Channel Telephone Signal Processor
Company: Vigra (619) 483-1197
Price: $1375
Availability: In beta test Sep/Nov 1992
DSP Processor: DSP56001 (27 MHz)
Analog I/O: 3 x 8KHz u-Law CODECs. (Line 1, Line 2, handset)
Features: Two RJ-11 telephone jacks, and local handset jack, DTMF transmit
& detect, hook switch control, ring detect, Call progress monitoring
SunOS drivers, programming library, demos. All source code included.
SBus boards, Texas Instruments TMS320 processors:
----------------------------------------------------------------------------
Board Name: SPIRIT-30
Type of Board: 33 MFLOP Application Accelerator -- SBus
Company: Sonitech International Inc. (617) 235-6824
Price: $8,995 ($9,795 for the 40 MFLOP board)
Availability: Now
DSP Processor: TMS320C30
Analog I/O: Optional serial port box (extra $1795), IC-100-1 16 bit single
channel @ 100kHz or, DSP/AIB-1: A/D 2 ch., D/A 1 ch., sampling
rate up to 20 kHz,anti-aliasing filters, telephone handset interface
($480). Stereo audio and telephone interface card (1-22) for $695
comes with SW library and demo programs.
Features: Other options for the A/D/A system are available. Filter modules
are extra. Board runs the SPOX operating system. All of their boards are
code compatible with each other (PC and SUNs and VME). Up to six SPIRIT-30
cards can be configured for a 240 MFlop parallel processing system.
Board Name: SDSP/C30D
Type of Board: TMS320C30 SBus Processor Card
Company: Loughborough Sound Images
DSP Processor: TMS320C30 33 MHz 128Kwords RAM
Board Name: SDSP/C30S
Type of Board: TMS320C30 SBus Processor Card
Company: Loughborough Sound Images
DSP Processor: TMS320C30 33 MHz 128Kwords RAM
Features: SCSI interface.
SBus boards, other processors:
----------------------------------------------------------------------------
Board Name: ADDA1418-166
Type of Board: S-Bus A/D and D/A (A/D and D/A are also available separately)
Company: Analyx Systems Inc. (510) 656-8017
Price: $2,495.00 (4-92) (A/D only $1,995, D/A only $1,895)
DSP Processor: None
Analog I/O: 166 kHz 16 channel, 14 bit isolated A/D, 4 Channel 18 bit D/A
Features: 32K Dual-Ported on-board RAM. Single S-Bus slot. All software
included.
Q4.1.4: VMEbus DSP boards.
VMEbus boards, Analog Devices processors:
----------------------------------------------------------------------------
Board Name: ADSP-21020 IXD7232
Type of Board: Dual ADSP-21020 VME bus board
Company: Ixthos, Inc.
DSP Processor: 2x ADSP-21020 512 Kbytes data/proc, 196 Kbytes prog/prc
Analog I/O: available via daughter card
Features: I/O mezzanine, RS-232 port, digital I/O option
VMEbus boards, AT&T processors:
----------------------------------------------------------------------------
Board Name: SURFboard
Type of Board: VMEbus DSP board
Company: AT&T (Louis Rosa 908-582-5667 or Jim Snyder surf@research.att.com)
Price: $10K
DSP Processor: 6 DSP-32C's organized as 2 sets of 3 processors
(input, output, central -- can be configured)
Analog I/O: None, but can use Ariel ProPort VME board.
Comments: Multiple boards can be chained together. Central DSP's both have
access to a 1Mbyte DRAM which is also the interface to the VMEbus. Input
and output DSP's only have 2Kx32 memory. Central DSP's also have 256Kbytes
of local SRAM.
VMEbus boards, Motorola processors:
----------------------------------------------------------------------------
Board Name: V-56 DSP56001 VME board
Type of Board: DSP56001 VME bus card
Company: Ariel Corp. (908) 249-2900
DSP Processor: 27 MHz Motorola DSP56001, 32Kw P RAM, 64Kw data RAM
Features: EPROM boot, 24 bit parallel I/O, serial drivers, 24 bit ADBus
peripheral expansion port.
Analog I/O: None.
Board Name: DSP56001 VME board
Type of Board: DSP56001 VME bus card
Company: Spectrum Signal Processing (604) 438-7266
DSP Processor: 2x Motorola DSP56200 10MHz 24K words RAM
Analog I/O: dual channel 16 bit 153 kHz A/D, D/A
Board Name: Versatile Array Signal Processor
Type of Board: VME-based three board (or more) set
Company: Spectrum Signal Processing (604) 438-7266
DSP Processor: 5x DSP96002
Comments: contains (1) general signal processing board (four processor
DSP96002 VME board), (2) I/O processor board (DSP96002 VME board),
(3) two-port memory board (4Mx64 bit dual port memory).
Board Name: MMI-105 Single Channel Audio/Signal Processor
Type of Board: VME board
Company: Vigra
DSP Processor: 20 MHz 56001 DSP (27 Mhz optional) 8K SRAM and 1 Meg ($1895)
or 8 Meg ($2995) DRAM
Analog I/O: 14 bit A/D and D/A; 8, 13.6, and 19 KHz sampling rates.
Features: Mic & line inputs, power amp & line outputs.
Board Name: MMI-210 Signal/Audio Processor
Type of Board: VME board
Company: Vigra
DSP Processor: 2x 27 MHz 56001 DSPs 8K SRAM (32K optional) and 1 Meg ($2995)
or 4 Meg ($3650) DRAM
Analog I/O: 16 bit A/D and D/A; 8, 16, 32, 44.1, 48, 96 Ksamples/sec
Features: Line and mic inputs, line and power amp outputs.
Board Name: MMI-420 Four Channel Signal Processor
Type of Board: VME board
Company: Vigra
Price: $3225
DSP Processor: 4 56001's 27 MHz - 96K SRAM and 16K EPROM per DSP
Features: 4 Megs multi-ported DRAM
Board Name: MMI-4210 Four Channel Signal/Audio Processor
Type of Board: VME board
Company: Vigra
Price: $5950
DSP Processor: 4x 56001's 27 MHz, 96K SRAM and 16K EPROM per DSP
Analog I/O: 4 16-bit A/D and 4 18-bit D/A converters, 1-50 kHz sample rate.
Features: Transformer or direct-coupled analog I/O. Programmable output mixing,
input and output gain levels. Digital mixing, speech energy detection, and
ADPCM on firmware.
VMEbus boards, Texas Instruments processors:
----------------------------------------------------------------------------
Board Name: SKY Challenger
Type of Board: VMEbus DSP board
Company: SKY Computers
DSP Processor: 2x TMS320C30
Board Name: Banshee\VME
Type of Board: VMEbus DSP accelerator card
Company: Atlanta Signal Processors, Inc.
Price: starts at $4,995
DSP Processor: TMS320C30
Analog I/O: available as a separate daughter board.
Features: Programming tools can be used through any PC-compatible computer
(separate debugging port).
Board Name: Triple TMS320C25 Processor Baseboard (4282)
Type of Board: VMSbus DSP board
Company: Pentek, (201) 767-7100
DSP Processor: 1x 20 MHz TMS320C25 master processor with 32Kx16 SRAM,
32Kx16 EPROM; 2x 40 MHz TMS320C25 slave processors with 8Kx16 SRAM
(accessible by master).
Features: 1Kx16 dual-port RAM between VMEbus and master processor.
Board Name: TMS320C30 Processor MIX Baseboard (4283)
Type of Board: VMEbus DSP board
Company: Pentek, (201) 767-7100
DSP Processor: TMS320C30, 32 MHz, 256 KB SRAM, 128 KB EPROM, 1, 4, or 8 MB
dual-port RAM.
Analog I/O: available as separate daughter board.
Features: MIX expansion bus, 17 pin I/O timer connector
Comments: the MIX expansion bus allows up to three additional MIX DSP boards
to be attached to the 320C30 baseboard. MIX boards available from Pentek
include: 1 processor TMS320C30; 2 processor TMS320C30; 3 processor AT&T DSP32C;
1 processor TMS320C40; 2 processor TMS320C40; and a variety of analog and
digital I/O interface boards.
Board Name: Dual TMS320C30 VME board
Type of Board: Dual processor TMS320C30 VME board
Company: Spectrum Signal Processing (604) 438-7266
DSP Processor: 2x TMS320C30 33 MHz, 64K words RAM per processor
Analog I/O: optional dual 18 bit 200 kHz A/D, D/A
Comments: 6U Eurocard format
Board Name: Ranger
Type of Board: VME board
Company: Image and Signal Processing
DSP Processor: up to 4 TMS320C30
Comments: Some libraries included.
VMEbus boards, other processors:
----------------------------------------------------------------------------
Board Name: CRV1M40
Type of Board: VME board (6U form factor)
Company: Catalina Research Inc., (719) 531-5767
DSP Processor: Sharp LH9124/9320 40 MHz
Analog I/O: None (?)
Features: 8K of VME address space, 16 pages of 32kx16 program space, mezzanine.
Q4.1.5: DSP development boards for the NeXT bus.
----------------------------------------------------------------------------
Board Name: QP-56
Type of Board: Five processor DSP56001 card for NeXT NextBus
Company: Ariel Corp. (908) 249-2900
DSP Processor: 5x DSP56001 26 MHz 8K/16K words RAM per processor
Features: Five NeXT compatible DB-15 ports.
Q4.1.6: DSP development boards for the SCSI bus.
----------------------------------------------------------------------------
Board Name: SKYstation
Type of Board: DSP vectorizing accelerator for sparc workstations
Company: SKY Computers (508) 256-1626
Price: $10K and up (depends on amount of memory required)
Availability: Now.
DSP Processor: I860/960
Analog I/O: None.
Comments: Vectorizing C and FORTRAN compilers available. Math library(hand
coded) also available. Company also makes VME cards with similar features.
Board Name: DAT-Link and DAT-Link+
Type of Board: Standalone SCSI unit
Company: Townshend Computer Tools (514) 289-9123
Price: US: $4,000-$4,500
Availability: 1 week delivery
DSP Processor: DSP-32C with 64k RAM, expandable to 2Mbytes.
Features: AES/EBU interface.
Comments: Full networked software with server, applications and libraries
including source. Real time playback/recording of stereo audio files.
Trainable IR transceiver - control any device with IR remote control.
Works with any UNIX work-station that has SCSI.
Board Name: DSP-32C
Type of Board: SCSI Interface DSP Board (actually a PC board which can be
accessed through an on board SCSI port).
Company: Ariel
Price: $3,495
Availability: Now
DSP Processor: AT&T DSP-32C
Analog I/O: 16 bit analog I/O
Comments: Includes the PDS-32C Program Development Software.
Board Name: DeskLab
Type of Board: SCSI data collection/analysis box
Company: Gradient (609) 387-8688
Price: $5,500
Availability: Now
DSP Processor: ?
Analog I/O: 14 bit A/D D/A, Telephone interface is available.
Comments: Complete package of data collection and analysis tools under UNIX.
It is not possible (supported) to directly access the DSP that is in the box
nor can user specified functions be run using their analysis package.
Q4.1.7: Standalone DSP development boards
----------------------------------------------------------------------------
Board Name: AE2000
Type of Board: TMS320C31 board
Company: Intellibit
DSP Processor: TMS320C31
Comments: Board is only 3"x2.5".
Board Name: ADSP-2105 DSP-11B, ADSP-2101 DSP-11S
Type of Board: ADSP-2105 and ADSP-2101 stand-alone DSP boards
Company: Innovative Devices
DSP Processor: ADSP-2105 or ADSP-2101
Analog I/O: 4x 14 bit A/D, 2x 14 bit D/A.
Comments: 3"x5" stand-alone DSP board.
Board name: ADSP-2101 based 4 kbps voice codec module
Type of Board: ADSP-2101 stand alone module?
Company: Specom Technologies
DSP Processor: ADSP-2101
Features: Voice coding based on CELP.
Comments: stand-alone module?
Board Name: ADSP-2105 Based digital voice playback system
Type of Board: ADSP-2105 stand alone module?
Company: Specom Technologies
DSP Processor: ADSP-2105
Comments: stores up to 2 hours of speech
Board Name: EZ-LAB kit
Type of Board: ADSP-2101 stand alone evaluation module
Company: Analog Devices
DSP Processor: ADSP-2101
Features: needs power supply, speaker, and microphone. Comes with PC
development software and some canned demos.
Board Name: MC68HC16EVB
Type of Board: Motorola 86HC16 standalone board
Company: Motorola
Processor: 68HC16
Analog I/O: 8 bit or 10 bit A/D, D/A requires obtional chip
Features: Includes asembler, simulator, demo C compiler that run on
an IBM compatable pee cee and communicate via printer port.
Comments: Motorola has been pushing the 68HC16 as a low-end DSP,
even though it's not what most DSP folks think of when they say "DSP".
==========================================================================
Q4.2: Who makes AES/EBU digital audio transceiver chips?
Several companies:
Sony Corp.: CX23033 transmitter, CX23053 receiver.
Comments: the Sony receiver chip is very difficult to work with due
to a bad PLL design.
Crystal Semiconductor Corp., (512) 445-7222
CS8411 and CS8412 receivers, CS8401 and CS8402 transmitters.
Comment: the 8411 and 8401 are designed for use with microprocessors/DSPs.
The 8412 and 8402 are intended for use in stand-alone applications.
Motorola Corp. (800) 521-6274 or (512) 891-2030 (DSP marketing)
DSP56401 transceiver.
Comment: designed for use with the DSP56000.
Yamaha: YM3613B transmitter, YM3623B receiver, YM3436 receiver,
YM3437 transmitter.
References:
Kahrs, Mark, "An AES/EBU Circuit Compendium or AES/EBU Circuits I Have
Known and Loved," presented at the 91st Convention of the Audio
Engineering Society, October 4-8, 1991. Reprints: AES, 60 East 42nd
St., New York, NY, 10165.
==========================================================================
5. Manufacturer's addresses and telephone numbers.
Analog Devices
1 Technology Way
P.O. Box 9106
Norwood, MA 02062-9106
Phone: (617) 329-4700
Phone: (617) 461-3672 (DSP applications assistance)
Phone: (617) 461-3881 (DSP marketing)
-----
Ariel Corp.
433 River Road
Highland Park, NJ 08904
Phone: (908) 249-2900
FAX: (908) 249-2123
BBS: (908) 249-2124
Email: ariel@ariel.com
-----
AT&T Microelectronics
Dept. AL-520404200
55 Union Blvd.
Allentown, PA 18103
Phone: (800) 372-2447
FAX: (215) 778=4106
-----
Atlanta Signal Processors, Inc. (ASPI)
770 Spring St.
Atlanta, GA 30308
Phone: (404) 892-7265
FAX: (404) 892-2512
----
Berkeley Camera Engineering
3616 Skyline Drive
Hayward, CA 94542
Phone: (510) 889-6960
FAX: (510) 889-7606
Email: mikep@nikon.ssl.berkeley.edu
-----
BittWare Research Systems, Inc.
Inner Harbor Center, 8th Floor
400 East Pratt Street
Baltimore, MD 21202
Phone: (800) 848-0435
FAX: (410) 783-7375
-----
Catalina Research Inc.
Colorado Springs
(719) 531-5767
-----
CMS GmbH
Postfach 100202
Einsteinstrabe 61-63
D-7505 Ettlingen
Germany
Phone: (07243) 31001
-----
Computer Continuum
75 Southgate Avenue
Daly City, CA 94015
(415) 755-1978
-----
Crystal Semiconductor Corp.
P.O. Box 17847
Austin, TX 78760
Phone: (512) 445-7222
FAX: (512) 445-7581
-----
Current Technology, Inc.
99 Madbury Road
Durham, N.H. 03824
Phone: (603) 868-2270
FAX: (603) 868-1352
-----
Dalanco Spry
89 Westland Ave.
Rochester, NY 14618
Phone: (716) 473-3610
-----
DigiDesign Inc
1360 Willow Road, Suite 101
Menlo Park CA 94025
Tel: 010 1 415 327 8811
FAX: 010 1 415 327 0777
-----
DSP Research
391 Balsam Ave. (OR Possibly: 1095 E. Duane Ave) {Someone clarify?}
Sunnyvale, CA 94086
Phone: (408) 773-1042
FAX: (408) 736-3451
-----
EnterTec, Inc.
P.O. Box 8858
Richmond, VA 23225
Phone: (804)353-7133
FAX: (804) 353-7134
-----
Hollis Electronics Co.
5 Northern Blvd., Unit 13
Amherst, NH 03031
Phone: (603) 598-4640
-----
Image & Signal Processing
120 Linden Avenue
Long Beach CA 90802
Phone: (213) 495-9533
FAX: (213) 495-1258
----
Innovative Devices, Inc.
1119 Damelart Way
Brentwood Bay, B.C. V0S 1A0
Canada
Phone: (604) 652-5240
-----
Intellibit
P.O. Box 9785
McLean, VA 22102-0785
Phone: (703) 442-4781
FAX: (703) 442-4784
-----
Ixthos, Inc.
12210 Plum Orchard Drive
Silver Spring, MD 20904
Phone: (301) 890-1000
-----
KINETICSYSTEMS
in USA:
William Ponton
Tel: 609-921-2088
FAX: 609-683-9633
in Europe:
Tel: 41-22-798-4445
FAX: 41-22-798-0525
-----
Logabex
ZI de Montaudran
3 Avenue Didier Daurat
31400 Toulouse
France
Phone: (33) 61-80-94-37
-----
Loughborough Sound Images Ltd
The Technology Centre
Epinal Way
Loughborough Leics LE11 OQE
England
Phone: +44 (0)509 231843
FAX: +44 (0)509 262433
N.B. U.S. distributor is Spectrum Signal Processing (see below)
-----
Motorola Corp.
DSP Operation
Mail Drop OE314
6501 William Cannon Drive, West
Austin, TX 78735-8598
Phone: (512) 891-2030 (marketing)
BBS: (512) 891-DSP1 (300/1200 bps)
BBS: (512) 891-DSP2 (1200 bps V.22)
BBS: (512) 891-DSP3 (2400 bps V.22bis)
-----
National Instruments
6504 Bridge Point Parkway
Austin, TX 78730-5039
Phone: (512) 794-0100
Phone: (800) 433-3488
FAX: (512) 794-8411
-----
Natural Microsystems Corp.
8 Erie Drive
Natick, MA 01760-1313
Phone: (800) 533-6120
-----
Pentek, Inc.
55 Walnut St.
Norwood, NJ 07648
Phone: (201) 767-7100
FAX: (201) 767-3994
-----
Prime Ideal
Joseph Virzi
2124 Parker Street #300
Berkeley, CA 94704
Phone: (415) 513-8062
-----
Saddle Point Systems
3960 Greenwood Ave.
Oakland, CA 94602
Phone: (510) 530-0971
-----
Sharp Microelectronics Technology, Inc.
5700 NW Pacific Rim Blvd
Camas, WA 98607
Phone: (206) 834-8711
FAX: (206) 834-8611
-----
Signal-Data
63 Vester Paradisvej
DK-2840 Holte
Denmark
Phone: (45) 30 42 6054
Phone: (301) 890-1000
-----
Sonitech International Inc.
(617) 235-6824
-----
Specom Technologies Corp.
3673 Enochs Street
Santa Clara, CA 95051
Phone: (408) 736-7832
FAX: (408) 736-7861
-----
Spectral Innovations
Santa Clara, CA
(408) 727-1314
-----
Spectrum Signal Processing
Westborough Office Park
1500 West Park Drive
Westborough MA 01581 USA
Phone: (508) 366-7355
FAX: (508) 89988 2772
----
Townshend Computer Tools
Phone: (514) 289-9123,
FAX: (514) 289-1831
E-Mail: datlink%tt@cam.org
----
Virga, Inc.
4901 Morena Blvd.
Bldg. 502
San Diego, CA 92117
(619) 483-1197
-----
Wavetron Microsystems
1135 Oddstad Drive
Redwood City, CA 94063
Phone: (415) 366-5371 or (415) 366-5375
Other information sources:
1. SBus Developer List maintained by Sun. Lists all known SBus devices
being developed. Contact Jeff Siegel (sieg@pistons.sun.com).
2. Signal Technology's N! Power (X-windows software for signal analysis)
is designed to work with "a variety of Data Acquisition Hardware devices."
Their system also has basic and advanced DSP modules.
3. Entropic Speech's Waves+ package (X-windows software for DSP type
processing -- includes a lot of speech tools) works with a number of
processor boards including some of those from Ariel.
=============================================================================
Questions, comments, or submissions for this FAQ should be mailed to
comp-dsp-faq@ohm.Berkeley.EDU, ...!ucbvax!ohm!comp-dsp-faq. Thanks!
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