Archived from groups: alt.tv.tech.hdtv (More info?)
"Frank Provasek" <frank@frankcoins.com> wrote in message
news:A%JBd.15113$RH4.12164@newsread1.news.pas.earthlink.net...
> The confusion is that computer people don't understand exactly how video
> engineers and film people define resolution.
>
> Resolution is measured per unit of picture height, so it's INDEPENDENT of
> the aspect ratio. The PIXEL COUNT (used by computer people) DEPENDS on
> the aspect ratio. A 1024x768 PIXEL standard computer monitor (4:3) and
> a 1366x768 PIXEL widescreen computer monitor have the SAME RESOLUTION
> 768x768
>
> Since 720p and 1080i are considered visually equivalent, RESOLUTIONS of
> at least 700 vertical and
> at least 700 horizontal (equivalent to 720 x 1280 PIXELS) are true HDTV.
> Some people freak to see that a high
> end CRT display is rated at "only" 800 lines horizontal. But multiply
> that 800 by the aspect ratio and you get 1422.
>
> So the 1024 x 1024 RESOLUTION display is 1024*(16/9) x 1024 PIXELS or
> 1820x1024 PIXELS
This is good information and is true when talking about broadcast signals or
traditional TVs, but is not necessarily true if you're talking about an LCD
or plasma display with a fixed resolution (ie, an actual fixed pixel array).
In most of these cases, 1024 IS the actual maximum number of pixels across
the entire width of the display.
"Frank Provasek" <frank@frankcoins.com> wrote in message
news:A%JBd.15113$RH4.12164@newsread1.news.pas.earthlink.net...
> The confusion is that computer people don't understand exactly how video
> engineers and film people define resolution.
>
> Resolution is measured per unit of picture height, so it's INDEPENDENT of
> the aspect ratio. The PIXEL COUNT (used by computer people) DEPENDS on
> the aspect ratio. A 1024x768 PIXEL standard computer monitor (4:3) and
> a 1366x768 PIXEL widescreen computer monitor have the SAME RESOLUTION
> 768x768
>
> Since 720p and 1080i are considered visually equivalent, RESOLUTIONS of
> at least 700 vertical and
> at least 700 horizontal (equivalent to 720 x 1280 PIXELS) are true HDTV.
> Some people freak to see that a high
> end CRT display is rated at "only" 800 lines horizontal. But multiply
> that 800 by the aspect ratio and you get 1422.
>
> So the 1024 x 1024 RESOLUTION display is 1024*(16/9) x 1024 PIXELS or
> 1820x1024 PIXELS
This is good information and is true when talking about broadcast signals or
traditional TVs, but is not necessarily true if you're talking about an LCD
or plasma display with a fixed resolution (ie, an actual fixed pixel array).
In most of these cases, 1024 IS the actual maximum number of pixels across
the entire width of the display.
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