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Help: I'm confused; Horizontal vs Vertical and Pixels vs Lines

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Old 08-02-2006, 02:09 PM   #1
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Default Help: I'm confused; Horizontal vs Vertical and Pixels vs Lines

Accroding to the HDTV Glossary link on this forum:

--- BEGIN glossary quote ---
1080i:
1080i means that the resolution of the picture is 1920 vertical pixels by 1080 horizontal pixels and i stands for interlaced scanning. Interlaced scanning is based on the principle that the screen shows every odd line at one scan of the screen and then all the even lines in a second scan.

1080p:
1080p means that the resolution of the picture is 1,920 vertical pixels by 1,080 horizontal pixels and p stands for progressive scanning. This format works on the same principle as 720p; the only difference is that in this type there are more pixels and the resolution is better.
--- END glossary quote ---

When the glossary quotes 1080i as 1920 vertical pixels by 1080 horizonatl pixels.. does it mean the following:

1080i = 1080 horizontal pixels = 1080 lines (counted from from top to bottom of screen) with 1920 pixels ACCROSS the screen from LEFT to RIGHT? (BTW: I understand the difference between interlaced and progressive)

Does the HDTV spec use the same "industry standard" terms of quoting screen resolution the same as the Computer display standards

For example.

My PC is hooked up to a 24" (diagonal) DELL LCD display that has a native resolution of 1920x1200; (WxH)
1920 Horizontal Pixels ACCROSS the screen (left to right), and
1200 Vertical Pixels (aka Lines) DOWN the screen (top to bottom)

Does the HDTV industry reverse the order of Horizontal and Verticle specifications.. the PC industry uses (Width x Height).. does the HDTV industry use (Height X Width) instead?

This is where this confusion applies to reading the specs on HDTV native resolutions.

Check out the native resolution specs on these Panasonic Plasma Display specs: http://panasonic.ca/english/audiovid...specs_px60.asp

Why do they claim they are an HDTV spec Plasma when the native resolutions DO NOT EVEN meet the spec of 1080 lines?

Or is the "Native Resolution" only applicable when hooking up a PC to the display.. and has nothing to do with the HDTV 1080i tv signals?

Thanks any clarification you can offer.
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Old 08-02-2006, 02:49 PM   #2
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Quote:
Originally Posted by hholtmann
...Does the HDTV industry reverse the order of Horizontal and Verticle specifications.. the PC industry uses (Width x Height).. does the HDTV industry use (Height X Width) instead?
This is where this confusion applies to reading the specs on HDTV native resolutions...Why do they claim they are an HDTV spec Plasma when the native resolutions DO NOT EVEN meet the spec of 1080 lines?...Thanks any clarification you can offer.
Read no further --your answers are here ATSC Picture Display Formats: http://www.highdefinitionblog.com/?page_id=4
or here
DTV Formats and How That Relates to HDTV DTV Formats and How That Relates to HDTV

Last edited by maicaw; 08-02-2006 at 02:52 PM.
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Old 08-02-2006, 03:11 PM   #3
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Thanks man.. the ATSC clears my mind now..

Good thing i asked.. looks like those panasonics I referenced are not TRUE HD displays...

I guess i want to ensure I buy at minimum a 1280x720 HDTV unit.

Any brand/make/model recommendations for true 1280x720 or 1290x1080 HDTV units.
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Old 08-02-2006, 05:07 PM   #4
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Quote:
Originally Posted by hholtmann
...Any brand/make/model recommendations for true 1280x720 or 1920x1080 HDTV units.
I wouldn't touch that with a light saber - but I'm sure you will get many answers. -
ok - my next HDTV will be a 55-60" SXRD unless they make a bigger one I can afford by then.

Last edited by maicaw; 08-02-2006 at 05:10 PM.
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Old 08-04-2006, 08:59 AM   #5
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I see 1280 x 720, 1366 x 768, and 1920 x 1080 sets. Never saw a 1290 x 1080 set. The 1920 x 1080 sets seem to be universally marketed as "1080p" sets.

If I was you, I'd start by settling on what size set you may want, then reading up on the various technologies for screen display, LCD, plasma, CRT for direct view, various others for RPTV. What sets to look at are very different if you're looking for >30" vs. 50" and greater, some of those myriad of technologies are stronger or weaker at certain scree sizes.
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Old 08-04-2006, 01:57 PM   #6
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Quote:
Originally Posted by paulc
I see 1280 x 720, 1366 x 768, and 1920 x 1080 sets. Never saw a 1290 x 1080 set.
It was probably a simple transposition of the 2 and 9. In other words a typo. Not all of us type prefectly, er, perfectly.
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