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LCD HD TV question (768 vs. 1080i vs. 1080p)?

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Old Apr 18, 2007 | 12:51 PM
  #21  
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Originally Posted by steven975,Apr 18 2007, 12:54 PM
Bottom line is until they start using H.264 or VC-1 compression, 1080p won't be a standard. Since the HDTV standard calls for MPEG-2 that is unlikely. No broadcaster will switch to any of those standards when most of the TVs out there can't tune it.
For what it's worth, AT&T's U-Verse service uses H.264 compression to deliver a 1080i signal using 6mbps of bandwidth. My understanding is that DirecTV's new HD offering uses H.264 as well. I'm not sure about Dish or FIOS, however. I don't believe that HD is tied to any particular compression format - or are you talking strictly about OTA signals? In which case, I have aboslutely zero idea what sort of compression they're using.

Anyway, setting asside technicalities, when I went shopping for a television last year, based on side-by-side comparisons I found that the 1080p sets were noticeably better looking that 720p sets when the same 1080i signal was displayed. So I got a 1080p DLP. YMMV.
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Old Apr 18, 2007 | 01:09 PM
  #22  
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Originally Posted by steven975,Apr 17 2007, 07:45 PM
um, no. they're either 720/768p or 1080p. They accept 1080i but scale it down to the native resolution.

That's why 1080p is a big benefit...no scaling. It's a big deal because it seems most HDTVs have the cheapest scaling chip the manufacturer could get their paws on! This is especially true with LCDs. As if their dodgy color wasn't enough

BTW, I have a CRT HDTV and love it but wish it were bigger. My next TV will probably be a Sony SXRD or JVC HD-ILA projection set.
1080 resolution.... note the compatability, 1080i:

http://www.polaroid.com/global/detail.jsp?...&bmLocale=en_US

Same TV on sale at Circuit City 4th one down, says 1080i:

http://www.circuitcity.com/ssm/Flat-panel-...categorylist.do


Other 42" Polaroid that IS 1080p:

http://www.polaroid.com/global/detail.jsp?...&bmLocale=en_US


Soooooo, um, yeah. There is such thing as a 1080i flat panel unless of course both these sites are wrong. Stranger things have happened...
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Old Apr 18, 2007 | 01:52 PM
  #23  
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That's funny. Both TVs are listed as 1920x1080 resolution, but only one accepts a 1080p signal? I've never heard of such a thing.
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Old Apr 18, 2007 | 07:48 PM
  #24  
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the very first 1080p sets could not accept 1080p. That's F'd up, I know.

they accept 1080i, but display it at 1080p. All LCDs display progressively. Thus there are no 1080i sets. CRTs might get a mention, but they lack the resoloution to display a full 1080 distinct lines.
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Old Apr 18, 2007 | 07:54 PM
  #25  
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Originally Posted by Elistan,Apr 18 2007, 12:51 PM
For what it's worth, AT&T's U-Verse service uses H.264 compression to deliver a 1080i signal using 6mbps of bandwidth. My understanding is that DirecTV's new HD offering uses H.264 as well. I'm not sure about Dish or FIOS, however. I don't believe that HD is tied to any particular compression format - or are you talking strictly about OTA signals? In which case, I have aboslutely zero idea what sort of compression they're using.

Anyway, setting asside technicalities, when I went shopping for a television last year, based on side-by-side comparisons I found that the 1080p sets were noticeably better looking that 720p sets when the same 1080i signal was displayed. So I got a 1080p DLP. YMMV.
cable and sat companies are free to choose their compression technique on their private networks. The smart ones are no longer using MPEG2. Still, the HDTV spec calls for MPEG2 compression. You won't see a 1080p OTA broadcast anytime soon. If you do see one, cable is probably the only place but even that is slim. Satellite companies won't waste spectrum on 1080p because no one (relatively) will ever even demand it.

1080i is basically the same as 1080p anyway, especially for movies. For games it is different.
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