Re: 1080i on a 1280x720 naitive resolution HDTV?
- From: "Leonard Caillouet" <no@xxxxxx>
- Date: Tue, 21 Mar 2006 20:30:31 -0500
"Adam" <adamcharney@xxxxxxxxxxx> wrote in message
news:1142979050.527669.299120@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I have been searching for a while and not found an answer or
explanation to this simple question. How can a TV with native 1280x720
resolution display a 1080i picture in it's entirety?
If a TV only has 720 horizontal lines, I can not see how it could
magically have 1080 lines all of the sudden. Yet the majority of
HDTV's out today that have a native resolution of 1280x720 say they can
display all these resolutions: 480i, 480p, 720p, 1080i. It seems to go
hand in hand.
If it is taking this 1080i signal and dumbing it down to 720 lines (p
or i), and calling that "1080i", then why wouldn't they also claim to
be capable of 1080p or higher for that matter? To display a 1080i
signal, wouldn't you HAVE to have 1080 vertical lines?
Am I not understanding something? Could someone please explain this?
Thanks,
Adam
The signal is resampled, or scaled. Being able to display a signal is a
different matter than having a particular value for native resolution. The
only way to avoid resampling in the vertical is to have a true multisync CRT
monitor or projector. All fixed pixel displays have to resample to their
native resolution. 720p is more than adequate (if the resampling is done
well) for most consumer video applications.
Leonard
.
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- 1080i on a 1280x720 naitive resolution HDTV?
- From: Adam
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