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Article #228Re: Using an FM-Carrier for the Y [Luminance] Signal -- how to relieve the bandwidth issue?
From: Roderick Stewart
Date: Mon, 24 Sep 2007 20:00
Date: Mon, 24 Sep 2007 20:00
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In article <TdqdneyV4vffnWXbnZ2dneKdnZygnZ2d@pipex.net>, Brian Gregory [UK] wrote: > I'm not an really an expert either. > > Actually, come to think of it, thinking of QAM as a combination of AM and� > PSK isn't at all helpful. > > I think QAM should be thought of as two carriers in quadrature with each� > other each being AM modulated, that is multiplied by numbers (which can be� > both positive and negative). There's something awfully familiar about that description. I'm sure I've read about it in a book somewhere. Oh yes, that Mullard book about PAL television I read at school 40 years ago. Rod.
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X-Google-Thread: f928c,7e05cb8426dfb96 X-Google-Thread: 1133a5,7e05cb8426dfb96 X-Google-Thread: 115947,7e05cb8426dfb96 X-Google-Thread: ffcae,7e05cb8426dfb96 X-Google-Thread: f7d8a,7e05cb8426dfb96 X-Google-Attributes: gidf928c,gid1133a5,gid115947,gidffcae,gidf7d8a,public,usenet X-Google-Language: ENGLISH,ASCII Path: arc1-ca.pugleaf.net!g2news2.google.com!news1.google.com!newsfeed.stanford.edu!sn-xt-sjc-03!sn-xt-sjc-08!sn-xt-sjc-01!sn-post-sjc-01!supernews.com!corp.supernews.com!not-for-mail From: Roderick Stewart <escapetime@removethisbit.beeb.net> Newsgroups: uk.tech.digital-tv,rec.video.production,uk.media.tv.misc,uk.tech.broadcast,ba.broadcast Subject: Re: Using an FM-Carrier for the Y [Luminance] Signal -- how to relieve the bandwidth issue? Date: Mon, 24 Sep 2007 21:00:26 +0100 Organization: Posted via Supernews, http://www.supernews.com Message-ID: <VA.00000104.028263ce@removethisbit.beeb.net> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: Virtual Access Open Source http://www.virtual-access.org/ Reply-To: escapetime@removethisbit.beeb.net References: <46f6f08e$0$16535$4c368faf@roadrunner.com> <-oGdncjk2dKX-2rbnZ2dnUVZ8tWnnZ2d@pipex.net> <1190625855.747424.69010@d55g2000hsg.googlegroups.com> <TdqdneyV4vffnWXbnZ2dneKdnZygnZ2d@pipex.net> X-Complaints-To: abuse@supernews.com Lines: 18