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From: mcmahan@netcom.COM (Dave Mc Mahan)
Newsgroups: comp.dsp,sci.math
Subject: Re: resampling problem
Message-ID: <24737@netcom.COM>
Date: 20 Feb 91 03:34:41 GMT
References: <11145@pasteur.Berkeley.EDU> <1991Feb16.160801.7117@nuchat.sccsi.com> <2341@njitgw.njit.edu>
Organization: Dave McMahan @ NetCom Services
Lines: 33


 In a previous article, jfa0522@hertz.njit.edu (john f andrews ece) writes:
>In article <1991Feb16.160801.7117@nuchat.sccsi.com> steve@nuchat.sccsi.com (Steve Nuchia) writes:
>>Part 2 of my problem is to compute the samples directly, rather than
>>go through an intermediate.  Particularly not an analog intermediate.
>
>Just for clarity I would like to point out that resampling does not require 
>an analog intermediate but simply resampling of the resulting digital 
>output...
>
>BTW, can anyone recall the discussion on applying similar interpolation 
>to a sampled EKG some time ago? I believe someone wanted to reconstruct a
>complete EKG waveform from sampled data, and was actually testing these 
>digital techniques and reporting results here?  Perhaps I am incorrect but
>I beleive many of these ideas were tossed about then ...

I believe you were talking about me.  I did manage to get some FINE looking
waveforms from my re-constituted data.  I haven't been closely following this
thread.  I'll back track a bit and catch up, then I'll give you my 2 cents.
The algorithm runs quite quickly and works strictly in the time domain.  I
can process one data point every 1.5 milliseconds on a 68000 running at 10 MHz
and can generate 4 points (including the original point) to feed to the next
stage of my process.  With a bit of tweaking, I think I can get the CPU time
down to about 1 millisecond per input data point.

>john f andrews                SYSOP           The Biomedical Engineering BBS
>INTERNET jfa0522@hertz.njit.edu    LabRat@faraday.njit.edu    CIS 73710,2600

   -dave

-- 
Dave McMahan                            mcmahan@netcom.com
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