phil@osiris.UUCP (Philip Kos) (02/23/85)
(Not really trying to followup, just couldn't seem to find a "vnews" command to just plain POST an article...) I am interested in a fairly complete description of the current NTSC broadcast video standard, including carrier/subcarrier frequencies, bandwidths, actual timing parameters (e.g. H/V retrace times, etc.) as well as calculations/estimates of best/avg./worst case resolution. If any of you netters know the numbers or can find 'em, or if you can tell me where to look, I'd consider myself a better person for having the information. I'd also like details (if possible) on the proposed high-definition standards I've heard so tantalizingly little about recently. TIA - Phil Kos Operational and Clinical Systems Div. The Johns Hopkins Hospital ...!seismo!umcp-cs!aplvax!osiris!phil
dsi@unccvax.UUCP (Dataspan Inc) (02/27/85)
I know that I'll get flames for this, but the arguably best definition
of NTSC is in part 73 of the FCC Rules and Regulations. Contained therein
are the complete timing and bandwidth requirements for both monochrome and
colour telecasts.
In terms of resolution capability, see:
Day, A.G. : "From studio to home: how good is the electronic highway?
J. SMPTE 94:2 @ 216 (Feb 85)
Wendland and Schroder : "Signal processing for new HQTV systems"
Ibid. @ 190
Carlson and Bergen : "Perceptual considerations for HDTV systems"
J. SMPTE 93:12 @ 1127
Fukinuki, Hirano et.al.: "Experiments on proposed EDTV with NTSC compatibility"
J. SMPTE 93:10 @ 923
Chouinard and Barry: "NTSC and MAC signals in noise and interference environments"
Ibid. @ 930
Mazda, et. al. "Reference data for radio engineers" (or something like that)
This is just the stuff within arms reach of my desk, and there is
almost always interesting stuff on the topic of NTSC every month in SMPTE
journal. THE JURY IS STILL OUT ON HOW WELL NTSC CAN SERVE US INTO THE
NINETIES AND BEYOND. It may turn out that oversampled - bandwidth limited -
reconstructed NTSC is entirely adequate.
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Keeping NTSC the best television system in the world
David Anthony
DataSpan, Inc.