-=> Quoting Greg MacLellan to All on 10 Feb 98 11:09pm <=-
-=> Subj: Re: stereo from mono vcr? <=-
 GM> I know this sounds like a *REALLY* dumb question =) but does/can a mono 
 GM> vcr output a stereo signal over the coax output? I don't think there's 
 GM> anyway it could for tapes, since the stereo signals are stored totally 
 GM> independantly from the mono signal (so a mono vcr won't even touch 
 GM> them). 
Tapes will come out in mono, definitly.
 GM> But will the converter in VCRs (or other equiptment) output a stereo 
 GM> siganl, even though technically they're 'mono'? I'm not sure how the 
 GM> stereo signal is encoded into regular VHF transmissions - i assume it's 
 GM> independant of the mono signal, but perhaps not. It would also depend 
Tuners in most mono VCR's demodulate the signal, then re-send it out
over their outputs.  The converters also don't have the bandwidth to
pass the complete MTS stereo signal.  It will not decode anyway.  Now,
as to newer mono VCR's, I don't know.  That would need some
experimentation. :-)
 GM> on the converter i suppose - if it actually splits everything apart 
 GM> (which it might do, in order to generate separate signals for the 
 GM> regular audio/video line-outs (RCA plugs) that most VCRs have) and jams 
 GM> it back together again, or if it just filters out all the other 
 GM> channels execpt the one in question.. 
 GM> anyways, i dunno if i'm too clear here, but perhaps someone will 
 GM> understand me and know ;) thanks
The MTS encoding employs sub-carriers and dBX noise reduction on those
sub-carriers.  Those sub-carriers get filtered out on older Mono VCR's.
Hope that helps. :-)
Cameron Hall
cameron.hall@bluebeam.gryn.org | ad121@hwcn.org
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