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I am supposed to get HDTV programming this weekend, and one thing that's been nagging me since yesterday when I re-read the manual for my HDTV monitor, is that it says the component inputs only accept either 480i,480p, or 1080i. There is no mention of 720p.


So I'm wondering now, what happens with channels like ABC 7 which are only broadcasting shows in 720p?

If they get downconverted to 480p that would kinda suck! ?? I'd lose a lot of the picture resolution if it does that.
 

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HD receivers normally will convert 720p to 1080i.
 

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I have the same issue with my 4 year old Mitsubishi 55" Widescreen. From what I can tell, the new Samsung 160 I received from D* does a good job of converting 720p to 1080i.


2Curious
 

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They don't downconvert to 480p.


I would _guess_ that they take every two fields, de-interlace and smooth them, and show it twice for effective 720/30p.


Or, they also might take every 540-line field, up it to 720, and then have effective 720/60p. Maybe the latter is more likely, although you wouldn't get quite the picture resolution, the temorals would be better.
 

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Quote:
Originally posted by peter0302
They don't downconvert to 480p.


I would _guess_ that they take every two fields, de-interlace and smooth them, and show it twice for effective 720/30p.


Or, they also might take every 540-line field, up it to 720, and then have effective 720/60p. Maybe the latter is more likely, although you wouldn't get quite the picture resolution, the temorals would be better.
If you don't know, why guess and add to the confusion? In this case, you've managed to cross-convert 720p to, well, what sounds like 720p. Virtually all STB's resample the received 720p (60 fps) to 1080i (30 fps). The losses are, for all practical purposes, negligible and the process is far more complicated than you imagine.
 

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Here's the deal. If you have 720P coming in and your display likes 720P as most plasmas then you're in business, a great picture. However, if you have to downconvert to 540P and then upconvert to 1080P and then de-interlace to 1080I which is the process then you lose a great deal of info as 180 lines of resolution have been thrown away and then guessed at to get you to 1080P and then de-interlaced. That's why there have been many threads in this forum discussing which is best 720P or 1080I. It depends on what conversion processes it has to go thru. True 720P shot in 720P and delivered to a display device in 720P that can display it is better than 720P delivered to a display device that has to convert it to 1080i by guessing at info or data that's missing in order to display it. There's always something lost in a conversion process.
 

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Quote:
Originally posted by plasmamaniac
Here's the deal. If you have 720P coming in and your display likes 720P as most plasmas then you're in business...
The original poster has a 1080i display.
 

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I know and I explained that adequately but for all of the 720P naysayers I thought I would explain also the benefits of displaying 720P with 720P coming in. Alot of people don't understand that 720P converted to 1080I doesn't look that good and that's why I recommend to my friends to buy a display device that supports both 720P and 1080I. I explained I think exactly what happens when the conversion process happens but alot of people I know come to my for advice when they find they buy a Mits and can't display 720P without it being converted to 1080I by their STB and even if it did you would have an inferior picture quality.
 
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