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What does it mean when a HDTV...?



 
 
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  #1  
Old October 20th 07, 02:38 PM posted to uk.rec.video.digital
Arny Krueger
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Posts: 17
Default What does it mean when a HDTV...?

What does it mean when a HDTV claims to support 1080i, but can only display
768 vertical lines?

My own thinking says some interpolation is going on and the 1080i spec may
be dubious.


  #2  
Old October 21st 07, 06:25 PM posted to uk.rec.video.digital
Neil Smith [MVP Digital Media]
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Posts: 158
Default What does it mean when a HDTV...?

On Sat, 20 Oct 2007 10:38:27 -0400, "Arny Krueger"
wrote:

What does it mean when a HDTV claims to support 1080i, but can only display
768 vertical lines?



1080i is effectively 540 lines repeated as odd, then even fields. The
I stands for Interlaced. You want a 1080p set (P standing for
Progressive) which gives you a complete frame each time the display
refreshes.

My own thinking says some interpolation is going on and the 1080i spec may
be dubious.



Most of the claims on current "HDTV" sets are. I'm waiting until I can
afford a 1080p set with good colour rendition and actually half decent
reception too ;-)

Cheers - Neil
------------------------------------------------
Digital Media MVP : 2004-2007
http://mvp.support.microsoft.com/mvpfaqs
  #3  
Old October 22nd 07, 08:59 AM posted to uk.rec.video.digital
Dr Hfuhruhurr
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Posts: 29
Default What does it mean when a HDTV...?

On 20 Oct, 15:38, "Arny Krueger" wrote:
What does it mean when a HDTV claims to support 1080i, but can only display
768 vertical lines?

My own thinking says some interpolation is going on and the 1080i spec may
be dubious.


It will accept (support) the 1080i input but will downscale to 768.
IMO it's a cheat

Doc

 




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