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From: taras@utgpu.UUCP
Newsgroups: sci.electronics
Subject: Re: NTSC to PAL and back
Message-ID: <1987Oct25.011135.5097@gpu.utcs.toronto.edu>
Date: Sun, 25-Oct-87 01:11:35 EST
Article-I.D.: gpu.1987Oct25.011135.5097
Posted: Sun Oct 25 01:11:35 1987
Date-Received: Mon, 26-Oct-87 05:35:45 EST
References: <8631@shemp.UCLA.EDU> <4189@cit-vax.Caltech.Edu>
Reply-To: taras@gpu.utcs.UUCP (T. Pryjma)
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Organization: University of Toronto Computing Services
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Checksum: 33001


The method is fairly simple, but for the time being fairly expensive.
What is done, is the incoming signal is digitized and stored in high speed,
dual ported video ram, then on the output side the ram is read and 
converted into either the PAL or NTSC signal you require.  Just remember
easier said than done.

The problem also arises in that scan rates differ between NTSC and PAL,
and the number of scan lines also differ.
-- 

			 	Taras Pryjma 
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