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Article #204Re: Y [Luminance] signal on FM carrier wave.
From: Roderick Stewart
Date: Fri, 02 Nov 2007 23:00
Date: Fri, 02 Nov 2007 23:00
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2759 bytes
In article <472b9a39$0$20584$4c368faf@roadrunner.com>, Green Xenon [Radium] wrote: > Anyways, again, the following is interesting but only� > theoretically-possible. Not gonna happen with today's technology: > > The original Y signal is converted to QAM. This QAM signal is then� > broadcasted on an FM radio carrier wave whose base frequency is 300 Hz.� > 300 Hz is the lowest ULF frequency and the lowest frequency used by� > telephones. Not gonna happen at all. If you try to modulate a 300Hz carrier with 5MHz video you'll end up with a mess. > Prior to converting the Y signal to QAM, the temporal and spatial� > frequencies [excluding DC -- 0 hertz] are downshifted in real time [sort� > of like the video-equivalent of the voice-changers used on the phone� > which can decrease the pitch of your voice in real time without� > decreasing the speed of your speech]. This frequency downshifting does� > not involve decreasing the "speeds" of the temporal or spatial� > components of the Y-signal. All temporal and spatial frequencies other� > than zero-hertz are shifted closer to zero. This decreases the bandwidth� > of the Y-signal. No low-pass filtering. No changing the speed of the� > temporal signal. No changing the size of the spatial signal. You still believe in magic, don't you? Rod.
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X-Google-Thread: f928c,ab81b61b65e80ebd X-Google-Thread: ffcae,ab81b61b65e80ebd X-Google-Thread: 107cee,ab81b61b65e80ebd X-Google-Thread: f7d8a,ab81b61b65e80ebd X-Google-Thread: fdad6,ab81b61b65e80ebd X-Google-Attributes: gidf928c,gidffcae,gid107cee,gidf7d8a,gidfdad6,public,usenet X-Google-Language: ENGLISH,ASCII X-FeedAbuse: http://nntpfeed.proxad.net/abuse.pl feeded by 88.191.71.11 Path: arc1-ca.pugleaf.net!g2news2.google.com!news2.google.com!news.glorb.com!news.cs.univ-paris8.fr!proxad.net!feeder1-2.proxad.net!nntpfeed.proxad.net!news.netfinity.fr!feeder.news-service.com!sn-xt-ams-06!sn-xt-ams-05!sn-ams!sn-feed-ams-02!sn-post-ams-02!sn-post-sjc-01!supernews.com!corp.supernews.com!not-for-mail From: Roderick Stewart <escapetime@removethisbit.beeb.net> Newsgroups: uk.tech.digital-tv,uk.tech.broadcast,sci.electronics.misc,ba.broadcast,alt.radio.broadcasting Subject: Re: Y [Luminance] signal on FM carrier wave. Date: Fri, 02 Nov 2007 23:00:06 -0000 Organization: Posted via Supernews, http://www.supernews.com Message-ID: <VA.000001a5.026b23b2@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: <472b9a39$0$20584$4c368faf@roadrunner.com> X-Complaints-To: abuse@supernews.com Lines: 28