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From: karsh@trifolium.esd.sgi.com (Bruce Karsh)
Newsgroups: comp.dsp
Subject: Re: Complementary filters
Message-ID: <77352@sgi.sgi.com>
Date: 7 Dec 90 05:03:52 GMT
References: <9441@pasteur.Berkeley.EDU>
Sender: guest@sgi.sgi.com
Reply-To: karsh@trifolium.sgi.com (Bruce Karsh)
Organization: Silicon Graphics, Inc., Mountain View, CA
Lines: 12

In article <9441@pasteur.Berkeley.EDU> maverick@fir.Berkeley.EDU (Vance Maverick) writes:

>Is there a recipe for generating the "complement" of a given filter?  Or
>for generating a pair of filters which are complementary in this sense? 
>I've seen the basic transformations between lowpass and highpass
>filters, and I don't think they qualify.

Generate one of the too signals, e.g. the low passed signal.  Subtract it
from the original signal to get the high passed signal.

			Bruce Karsh
			karsh@sgi.com