HDTenEightyP/NetNews huggingface dataset:
From: cpetterb@javelin.sim.es.com (Cary Petterborg)
Subject: Re: EMAIL: Alyn P. Rockwood ?
Organization: Evans & Sutherland Computer Corp.
Date: Wed, 22 Jul 1992 17:33:48 GMT

In article <1992Jul21.221437.5678@u.washington.edu> halldor@groebner.me.washington.edu (Halldor Magnusson) writes:

>   Does anyone in comp.graphics know of a valid E-mail address for 
>   Alyn P. Rockwood.  Last know location was SGI.  Thanks....

From last years' business card (he's at ASU now):

	rockwood@asuvax.eas.asu.edu

I haven't tried this, but it SHOULD work.

Cary
--
_______________
Cary Petterborg					   (801)582-5847 x6893
Evans & Sutherland Computer Corp.  Simulation Division   SLC, UT 84108
UUCP: ...!uunet!sim.es.com!cpetterb  *NET: cpetterb@javelin.sim.es.com
_______________
Not everything that counts can be counted.  Not everything that can be
counted counts.   - Charles Garfield
From: johns@mcs213c.cs.umr.edu (John Stone)
Newsgroups: comp.graphics
Subject: Re: PBMPLUS
Date: 26 Jul 92 22:35:53 GMT
Organization: University of Missouri - Rolla


   
    If anyone out there is using OS/2 2.0, I've got a fair portion of 
pbmplus ported now... I'm about halfway done... All that had to be done
to port each program is build a .lib file out of the libp?m*.c files,
and then to edit all of the file I/O stuff so that it uses binary
I/O instead of text (OS/2 and Dos both default to text mode on the
stdin and stdout)  
The hardest part about the OS/2 port is that IBM C Set/2 won't let you
use setmode() on a stream (which is how a friend of mine did a port of it
to dos...)  So I had to use fdopen(); to do it.
Using fdopen, means that I have to edit every call to a file I/O function
and make sure it calls my binary file handle, and not the regular stdout 
handle etc.

If anyone wants these binaries, just send me e-mail...
The ones that I have done have been tested and I know that they work.
Another guy has attempted to port them previously, but he didn't test
any of his binaries and none of the ones of his that I tried worked,
which is why I'm slowly doing mine, and testing as I go along...

Later,
         John Stone
         johns@cs.umr.edu
From: hewitt@usafa.af.mil (W. Joe Hewitt)
Newsgroups: comp.graphics
Subject: Circle algorithms needed
Keywords: circles algorithm
Date: 28 Jul 92 23:32:09 GMT
Distribution: comp
Organization: U.S. Air Force Academy, Colorado



     What is the best (a good) algorithm to determine if a point (x,y)
is contained within a circle of given center (x,y) and radius (r)?

     Also, what is the best (again, a good) algorithm to determine if
a circle (x,y,r) is contained completely and/or partially within
a bounding circle (x,y,r)?

     Finally, what is the easiest way to determine if circle A
intersects circle B at any point?

     Many thanks in advance to all the circle experts out there...

Cheers!

--Joe
-- 
 )       (         / \               )   )             _/__/_
 \   ^   /       _/__/___    _      /__ / _  _    _ o  /  /
  \_/ \_/   o   (_/   (__)__(/__   /   / (/__(_/\_)_(_(__(__  
W. Joe Hewitt, 1Lt, USAF                  hewitt@usafa.af.mil
From: worden@ut-emx.uucp (Sue J. Worden)
Newsgroups: comp.cog-eng
Subject: 3D-effect Buttons
Date: 22 Jul 92 13:36:24 GMT
Organization: The University of Texas at Austin, Austin, Texas

> Article: 2266 of comp.cog-eng
> From: mathew@mantis.co.uk (mathew)
> [ ... ]           People continue to buy products which are overloaded with
> unnecessary features, plastered with stupid 3D-effect bevelled edges and
> [ ... ]                   "Hey, hang on a minute, all these grey 3D-effect
> buttons are very pretty, but they're all confusingly different and don't
> really gain me anything useful anyway."                        [ ... ]

	I'm not a PC person and I'm not familiar with Windows.
	Perhaps Microsoft has managed to really screw up their
	user interface by poorly managing their screen space
	and feature selection dynamics.  I don't know about
	that.  But what I do know is that in other packages
	I've used, I've found the 3D-effect bevelling to be
	both visually and functionally pleasing.

	:Sue Worden (worden@emx.cc.utexas.edu)
Xref: sparky comp.research.japan:203 comp.ai:2878
From: kmasrani@nyx.cs.du.edu (Kamlesh Masrani)
Subject: Re: Need a general-purpose DSP card for PC/AT bus
Organization: University of Denver, Dept. of Math & Comp. Sci.
 
Date: Tue, 21 Jul 92 21:29:38 GMT

Loughborough Sound Images Ltd
The Technology Centre
Epinal Way
Loughborough
Leicestershire LE11 0QE
England

tel + 44 509 231843
fax +44 509 262433


They provide a range of DSP boards that fit inside the IBM expansion slot.
The one I use based on the TMS320c25 with 1 channel 16 bit ADC and DAC.
It is really old hat technology now.  The rest of the group use the AT&T
DSP32, with dual channel 16 bit ADC and DACs.  Both boards are supported
by hyperception's hypersignal software.

Note because of noise the ADC's are only rated at 12 bits and 14 bits d
dynamic range.

We program the boards in assembly language but I believe cross compliers
are available (for a price).

The catch is the boards are quite expensive, my TMS cost 1300 pounds, while
the DSP32 cost about 2000 pounds (without the Debugger).  Considering
a pound to dollar conversion rate of 1.90, plus your Value Added Tax
makes them very expensive.


note the boards have the usual external ram, interrupt timers, (and some-
times dma).

The guy next door has justed prototyped his own DSP32 development card
with dual channel sigma delta converters.  He claims a dynamic range
of 15.5 bits from his 16bit converters.  Also the sigma delta have an
internal aliasing filter at half the sampling rate.  His timer is also
a programable interger of 1 Hz (70 - 50k) I think. And uses zero wait
state (20ns) sram upto 256 k external.  He says its a better board and
is trying to get a supplier to stock it.



anyway the IEEE spectrum is full of advertisements for dsp boards.  ie the
Tiger boards ...


Kamlesh Masrani

direct email - kam@uk.ac.hull.ee.comms.

Newsgroups: comp.dsp
From: tchamov@sunran1.cern.ch (Nikolay Tchamov)
Subject: DSP C-source-code-book
Keywords: DSP, DSP-programs, C-source-codes
Organization: CERN European Lab for Particle Physics
Date: Wed, 22 Jul 1992 07:51:03 GMT


Hi,

Does anyone knows about DSP-book with C-source-codes of subroutines ? 
I think, somewhere was printed an article (1990 or 1991) about such book. 
Have you seen it, what is the author-name, book-title exactly, 
editoral-company and what are the estimations about it ?

Thanks in advance,

Nick

--------------------------------------------- 
 Nikolay Tchamov
 E-mail:             tchamovn@cernvm.cern.ch
---------------------------------------------                  
                   
              





Newsgroups: comp.dsp
From: mcdowell@exlog.com (Steve McDowell)
Subject: Re: DSP C-source-code-book
Keywords: DSP, DSP-programs, C-source-codes
Organization: EXLOG, Inc.
Date: Wed, 22 Jul 92 23:24:45 GMT

In message <1992Jul22.075103.16462@dxcern.cern.ch>tchamov@sunran1.cern.ch (Nikolay Tchamov) asks:
>
> Does anyone knows about DSP-book with C-source-codes of subroutines ? 
> Have you seen it, what is the author-name, book-title exactly, 
> editoral-company and what are the estimations about it ?


There's a book called "C LANGUAGE ALGORITHMS FOR DIGITAL SIGNAL PROCESSING"
by Paul M. Embree and Bruce Kimble. It's from Prentice-Hall (1991). 

It's pretty decent. It's starts out with a "refresher" about DSP and then jumps 
right in with implementation details. We're talking 456 pages with a disk full
or source code. I think we paid about $50US for the book. 
-- 
Steve McDowell             . . . . o o o o o 		Opinions are 
Exlog, Inc.	                  _____      o     	mine, not my 
mcdowell@exlog.com      _____====  ]OO|_n_n__][.    	employers..
		       [_________]_|__|________)<
From: herman@nosc.mil (John W. Herman)
Newsgroups: comp.dsp
Subject: Re: Adress of memory beyond 1M on PC
Date: 27 Jul 92 19:56:31 GMT
Organization: Naval Ocean Systems Center, San Diego, CA


Zhang Ya Xin writes:

>    We have a TANG IBM/PC 386 which has 4M of memory. Normally the adress
>of memory in the PC consists of a segment plus an offset, say, ****:****.
>1M is the limitation. My question is how can I access the memory beyond 1M?
>In other words, is there an adress of the memory beyond 1M in the PC?

There is at least one library available from wsmr-simtel20.army.mil that
will interface to Turbo C or Microsoft C for this purpose.
Xref: sparky comp.dsp:1804 comp.music:3791
From: dce@smsc.sony.com (David Elliott)
Newsgroups: comp.dsp,comp.music
Subject: Re: Common Sound API?
Date: 21 Jul 92 21:34:29 GMT
Organization: Sony Microsystems, San Jose, CA


In article <ni4r8rs@fido.asd.sgi.com>, cpirazzi@bonk.esd.sgi.com (Chris Pirazzi) writes:
|> In article <1992Jul20.224353.935@smsc.sony.com> dce@smsc.sony.com (David Elliott) writes:
|> >Are there any common sound APIs on Unix that are fairly broad (that is,
|> >handle a large set of sound systems) and also popular enough that
|> >software uses it?

|> I heard some other vendors were interested in licensing our API,
|> so it's possible that this API will come into more widespread use.

Hmm.  I think I should have added one thing: The API should also be
freely available.

While I have no reason to believe that SGI's API is anything less
than great, I don't think I would be able to convince Sony that
we should replace our existing API if we have to license it from
another company.

Now, if SGI were to consider making their API specification freely
available...

-- 
...David Elliott
...dce@smsc.sony.com | ...!{uunet,mips}!sonyusa!dce
...(408)944-4073
..."I take my arms and I wrap them around my art." - F
From: lordSnooty@cup.portal.com (Andrew - Palfreyman)
Newsgroups: comp.dsp
Subject: 45 Billion MACs / second
Date: Thu, 30 Jul 92 21:50:05 PDT
Organization: The Portal System (TM)
Distribution: world

...is the title of an article in Electronic Design this month.
The device is a GaAs convolver: 128 taps at 358MHz produces the
quoted and phenomenal throughput. I/O is, sadly, analog.

Question..how does convolution map into arithmetic multiplication?
My books here are unable to inform. Feel free to toss ideas about!
 --------------------------------------------------------------------------
| lord snooty @the giant | Would You Like Fries With That?                 |
| poisoned electric head |              andrew_-_palfreyman@cup.portal.com |
 --------------------------------------------------------------------------
Newsgroups: comp.dsp
From: Victor Lam
Subject: BNR local dsp users group
Keywords: dsp users
Organization: Bell-Northern Research
Date: Tue, 21 Jul 1992 21:00:59 GMT

I am solociting support from all BNR employees on my intention to
create a local dsp users group. 

For those who are working directly/indirectly in dsp, there are occasions
where we need to communicate with other "dsp users" about information,
problems/solutions, experiences in using certain sw/hw products, new
algorithms, warning to others etc. Often we just need to pose a question to a
group of BNR dsp users who might potentially have the answers.

What a better way to do any of these things via a local dsp users group.
I realize that we have this global dsp group; but I believe there's 
still a need to have a local one of our own, where the problems/issues we share
are more "common" than with others outside BNR.

To create such new users group, I need to have some "vocal" support from
you who believe in the need for this dsp group. I have spoken with
several BNR employees including some managers here at Carling lab, and
they all felt it was a great ideas. If you support the idea, please reply to
this open letter and voice your opinion. I was told that only when there
is sufficient demand before a new group can be justifiably created. 

Thank you in advance for your support!
Newsgroups: comp.dsp,comp.compression
From: tayfun@cbnewsm.cb.att.com (tayfun.cataltepe)
Subject: Vocoder software
Organization: AT&T
Date: Thu, 30 Jul 1992 15:18:14 GMT
Keywords: vocoder, LPC-10, TI, software

A friend of mine who does not have a usenet access wants to 
acquire LPC-10 vocoder software for Texas Instruments TMS
digital signal processor.

Does anyone know any companies which sell the source code ?


Newsgroups: comp.dsp
From: bdbryan@eng.clemson.edu (Ben Bryant)
Subject: Re: Need a general-purpose DSP card for PC/AT/386/486 
Reply-To: bdbryan@eng.clemson.edu
Organization: College of Engineering, Clemson Univ.
Date: Thu, 23 Jul 1992 02:05:44 GMT

Have you checked Ariel Corporation in New Jersey? -They do the Digital Microphone
for the NeXT, and I think I read in one of NeXT's catalogs that they produce
a board for the PC that accepts the digital input from the digital mic. -Sorry,
don't know their address right off the top of my head, but I'm sure you could
contact them through a NeXT rep. The DM probably gives around a 15.5 bit dynamic
range because of the fact that the digital electronics are not seperated from
the transducer by a long analog cable, i.e. the cable transmits digitally encoded
info.
From: cpirazzi@bonk.esd.sgi.com (Chris Pirazzi)
Newsgroups: comp.dsp
Subject: Re: Common Sound API?
Date: 21 Jul 92 23:20:06 GMT
Organization: Silicon Graphics, Inc., Mountain View, CA

In article <1992Jul21.213429.18469@smsc.sony.com> dce@smsc.sony.com (David Elliott) writes:
>
>|> I heard some other vendors were interested in licensing our API,
>|> so it's possible that this API will come into more widespread use.
>
>Hmm.  I think I should have added one thing: The API should also be
>freely available.
>
>While I have no reason to believe that SGI's API is anything less
>than great, I don't think I would be able to convince Sony that
>we should replace our existing API if we have to license it from
>another company.
>
>Now, if SGI were to consider making their API specification freely
>available...
>

hmm, well I just said 'licensing' because I heard someone was
interested in that, but that was a while ago and I'm not sure what the
current status is.

So, you might want to call Dave Larson at SGI (415 960 1980) to
find out what the current possibilities are ...

	- Chris Pirazzi
Newsgroups: comp.dsp
From: eddins@bert.eecs.uic.edu (Dr. Steven L. Eddins)
Subject: Re: Numerical Recipes FFT routine bugs ???
Organization: EECS Dept., University of Illinois at Chicago
Date: Fri, 24 Jul 1992 20:37:17 GMT

croteau@ccwf.cc.utexas.edu (Ed Croteau) writes:

>Does anyone have any information on the "FOUR1.C" routine in the
>Numerical Recipes in C book? I believe that the routine as printed
>(and on a source disk) does not properly compute the FFT (try a 
>simple real SIN wave and examine the imaginary).  Please let me know
>if I am wrong about this but it seems like the imaginary part is
>frequency reversed or something similar.

Perhaps your difficulty is in their definition of the DFT (Discrete
Fourier Transform).  See equations (12.1.7) and (12.1.9), and note
that the signs in the complex exponential terms are reversed from the
engineering norm.  Or maybe I shouldn't say "norm"---it's reversed
from the definition *I* use.  ;-)

-- 
Steve Eddins	
eddins@holst.eecs.uic.edu 	(312) 996-5771 		FAX: (312) 413-0024
University of Illinois at Chicago, EECS Dept., M/C 154, 1120 SEO Bldg,
Box 4348, Chicago, IL  60680
From: greg@gmp.lonestar.org (G.R. Basile)
Newsgroups: comp.dsp
Subject: Re: Energy within a Digitized Pulse
Keywords: Attenuation, Energy
Date: 28 Jul 92 14:57:40 GMT
Organization: GMP Research Co., Dallas TX

liuc@madrone.eecs.ucdavis.edu (Chia-Liang Liu) writes:

> In article <uJVgoB1w164w@gmp.lonestar.org> greg@gmp.lonestar.org (G.R. Basile
> >
> >Isn't this only an approximation? For a countinuous signal the power is
> 
> Yes and No! If you try to evaluate the energy of the original
> continuous signal, you either use Simpson's rule or over-sample
> the signal to increase the accuracy. However if you are talking about
> the energy of a sampled_and_hold signal, sum and multiply by Ts is
> what you want.
> 
> -- 
> Ka-Leung Lau ( Chia-Liang Liu )

I agree. What has piqued my curiousity is how to derive an exact solution
of the power of the continuous time signal from the sampled data. What about
taking an fft of the samples and than summing the square of the magnitudes ? 
What errors are introduced?

Greg Basile
greg@gmp.lonestar.org
From: stefank@elixir.lne.kth.se (Stefan Karlsson)
Newsgroups: comp.dsp
Subject: Synchronizing TMS 320C30 inputs with SPOX?
Keywords: SPOX
Date: 27 Jul 92 11:04:32 GMT
Organization: School of EE, Royal Institute of Technology, Sweden

Hello! 

If I issue two calls to the SS_get() function, one or more samples may arrive in
between (at least with 20kHz sample rate). This results in the two input streams
not being synchronized.
What I can do is to stop the sampling before the first SS_get() call and start
sampling again after the last SS_get call, but I don't like that solution.
Do I have to write own interrupt service routines (and can they be used with
SPOX?) or does anybody a better way to synchronize the inputs?

Stefan Karlsson
Newsgroups: comp.dsp
From: jjsmith@nyx.cs.du.edu (Jonathan J. Smith)
Subject: ADSP-21020, information on
Organization: Nyx, Public Access Unix @ U. of Denver Math/CS dept.
Date: Fri, 24 Jul 92 16:29:16 GMT


A couple of things here:

  1) anyone Know of any existing, public domain software fo this DSP
     chip?  If so could you please point me in the right direction.

  2) Does Analog devices mantain some sort of ftpable achive and information
     site similiar to motorolas?  Pointers to such a thing if it exists
     Would be appreciated.


Thanks much for any help.

Jonathan Smith
From: miket@beav.EBay.Sun.COM (Mike Taylor)
Newsgroups: comp.dsp
Subject: 56K vs. c50 vs. dsp1610
Date: 29 Jul 1992 20:10:54 GMT
Organization: Sun Microsystems, Inc.
Distribution: world
Reply-To: miket@beav.EBay.Sun.COM
NNTP-Posting-Host: beav.ebay.sun.com

I'm looking at three chips.

	56156    @ 33ns/instruction
	320c50   @ 35ns/instruction
	dsp1610  @ 25ns/instruction

Has anyone done a comparative analysis of these three chips?  It's pretty tough
to determine which of these would be best.  For instance, just yesterday I 
noticed that an external write on a c50 takes two cycles and if a read precedes the
write, the write takes 3 cycles.  This is a pretty serious hit if you need to do
a lot of memory accesses.  This jucy peice of information is not listed in the data
book at all until you get to the wayyyyyyy back where the timing diagrams are and you
look at the smalllllllll print.  This penalty doesn't exist in the C25 becuase this part uses a two-phase clocking scheme and an entire read or write cycle can be performed within the boundaries of a single clock cycle.  The c50 operates at the
boundaries.

It looks like the 1610 does not suffer from this problem, but I have not gotten very
far along in my analysis of this part.  I haven't seriously looked at the 56156, yet.

Thanks for any insight.
-mike



Newsgroups: comp.dsp
From: dave@imax.imax.com (Dave Martindale)
Subject: Re: DSP C-source-code-book
Keywords: DSP, DSP-programs, C-source-codes
Organization: Imax Corporation, Mississauga Canada
Date: Fri, 24 Jul 1992 05:15:08 GMT

Another possibility:

	Signal Processing in C
	Christopher E. Reid and Thomas B. Passin
	John Wiley & Sons, 1992
	ISBN 0-471-52713-0

Also available with a PC disk included, or sold separately.
Newsgroups: comp.dsp
From: zhang@zeus (Zhang Ya Xin)
Subject: Adress of memory beyond 1M on PC
Organization: The University of Western Australia
X-Newsreader: Tin 1.1 PL4
Date: Wed, 22 Jul 92 06:46:16 GMT

    We have a TANG IBM/PC 386 which has 4M of memory. Normally the adress
of memory in the PC consists of a segment plus an offset, say, ****:****.
1M is the limitation. My question is how can I access the memory beyond 1M?
In other words, is there an adress of the memory beyond 1M in the PC?
    Many thanks to the help.
From: greg@gmp.lonestar.org (G.R. Basile)
Newsgroups: comp.dsp
Subject: Re: Energy within a Digitized Pulse
Keywords: Attenuation, Energy
Date: 25 Jul 92 12:07:53 GMT
Organization: GMP Research Co., Dallas TX

liuc@madrone.eecs.ucdavis.edu (Chia-Liang Liu) writes:

> >1.  The energy of a continuous time signal is just the integral of
> >the square of the signal.  For a digitized signal, is it true that
> >the energy contained is just the sum of the squares of each point?
> 
> Yes, if you assume that the sampling interval, Ts, is 1.0; otherwise
> you need to multiply it by Ts to get the energy.
> 

Isn't this only an approximation? For a countinuous signal the power is
evaluated as the Integral of the function over a given period divided by
the period. Isn't the above algorithm akin to evaulating the integration
with Riemann sums. Simpson's rule could be used to increase the accuracy.
I would think that the error gets significant as the the frequency of
the function approaches half the sampling frequency.
What would be an exact solution ?

Greg Basile
greg@gmp.lonestar.org
Newsgroups: comp.dsp
From: thole@cs.rulimburg.nl (Johan Thole)
Subject: FFT for short-time signals (speech processing)
Organization: University of Limburg
Date: Thu, 30 Jul 92 09:25:28 GMT

I am going to be involved in a project in which I have to analyze 
speech signals. These speech signals are delivered as MU-LAW PCM 
data, sampled at 8000 Hz. After transforming the data to linear PCM, 
I want to perform a fourier transform, using approx. 10 ms data a time.

Does anyone know of a good FFT algorithm for short-term sequences? I
already experimented with the algorithms mentioned in "Numerical Recipes in
C" but I had several problems with them. 

A second question; Are there any good books on digital signal processing
with regard to speech processing?

I will summarize to the net; this will take some time because I'm not here
during the next week.


Thanks in advance for any information,

Johan Thole.
-- 
--------------------------------------------------------------------------------
Johan Thole (thole@cs.rulimburg.nl) | The wrong side of a door is
University of Limburg               | where the dog is.
Dept. of computer science           | #include <std/disclaimer.h>
From: noziska@qiclab.scn.rain.com (Pat Noziska)
Newsgroups: comp.dsp
Subject: Need a general-purpose DSP card for PC/AT bus
Summary: Need a general-purpose DSP card for PC/AT bus
Keywords: DSP , gneral purpose, PC bus
Date: 21 Jul 92 05:57:57 GMT
Organization: SCN Research/Qic Laboratories of Tigard, Oregon.

Does ANYONE out there sell a general-purpose DSP card for the PC/AT bus?
By general-purpose, I mean: 

	1. Has an Open architecture (i.e. one which will allow me to 
		write ANY kind of DSP code I want and make it work on the board)
	2. Not originally designed for a specific purpose (such as voice or fax)
	3. Has an RJ-xx interface (which sorta violates my second criterion,
	but it's what I would prefer). Telephony interface is a plus.
	

I'm hoping I can find a prefab, plug-and-program board, but if no such board
exists, I will entertain comments on the merits of, and recommendations of,
the available  DSP board prototyping and development kits out there for the
AT bus.

Thanks in advance for your help.


-- 
Pat Noziska
From: iay@threel.co.uk (Ian "A." Young)
Newsgroups: comp.dsp
Subject: Texas Instruments C40 pDSP...
Date: 24 Jul 92 11:39:31 GMT


Because our name has come up here in connection with the version of our
Parallel C product now available for the TI C40 processor, I thought it
might be worth posting the fact that we have an E-mail address you can
use to contact us:

      ThreeL@ThreeL.co.uk

Alan Culloch, the author of the paper which was posted here a couple of
days ago, can also be contacted at the following address:

      adc@ThreeL.co.uk

I'll stop now before this turns into an advertisment :-)

   -- Ian Young,              postmaster@ThreeL.co.uk
Newsgroups: comp.dsp