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Article #167Re: Using an FM-Carrier for the Y [Luminance] Signal -- how to relieve the bandwidth issue?
From: Brian Gregory [UK]
Date: Mon, 24 Sep 2007 07:23
Date: Mon, 24 Sep 2007 07:23
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2745 bytes
"Green Xenon [Radium]" <glucegen1@excite.com> wrote in message news:46f6f08e$0$16535$4c368faf@roadrunner.com... > Would using Quadrature Frequency Modulation be of any help? > > Quadrature Amplitude Modulation uses a combo of AM and Phase-Shift-Keying. > > So QFM would use a combination of FM and PSK. Would this decrease the > bandwidth required for broadcasting FM luminance video signals? Think about it. Obviously there is no way FM and PSK can be going on at the same time in any way that can convey separate information. Worse still if you separately FM modulate two signals that start in quadrature with each other they won't stay in quadrature. -- Brian Gregory. (In the UK) ng@bgdsv.co.uk To email me remove the letter vee.
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