[opendtv] Re: news: In Move to Digital TV, Confusion Is in the Air
- From: Tom Barry <trbarry@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 22 Dec 2008 18:42:47 -0500
That article once again explains the all-or-nothing digital cliff effect.
"Those who have their converter boxes have discovered the “cliff
effect.” If the over-the-air signal is not strong, the viewer does not
receive a fuzzy picture as he might get with a weak analog signal; the
viewer gets no picture at all because digital reception is all or nothing."
Everybody keeps telling me this but every place I've used HDTV in the
last 8 years or so there was not really a static digital cliff on iffy
channels. Instead as the reception got worse there would be increasing
frequency of video and audio break-up and drop-outs. This could
eventually get to a point where the channel was no longer worth
watching, even if it didn't go away entirely.
And I don't think I've ever had a channel with ZERO break-ups, at any
address with any antenna or receiver. So it somewhat annoys me we keep
pretending the signal is either there or not, with nothing in between.
That may be mostly true for any given moment but not over the course of
an entire show. The error correction span is just not long enough for
that to be true (and of course cannot be).
- Tom
Craig Birkmaier wrote:
In Move to Digital TV, Confusion Is in the Air
http://www.nytimes.com/2008/12/22/technology/22digital.html?_r=1&th&emc=th
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