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Posted by M.I.5 on 01/09/07 07:50
"chrisv" <chrisv@nospam.invalid> wrote in message
news:llq4q2hjcqa8chf989snjq8ubbd8ihcbrd@4ax.com...
> M.I.5 wrote:
>
>>"chrisv" <chrisv@nospam.invalid> wrote in message
>>news:5umsp2pk6asreh740v0el95lr06024eotj@4ax.com...
>>> M.I.5 wrote:
>>>
>>>>> There are most certainly common display devices in the HD display
>>>>> realm that are fully capable of surpassing the best abilities of the
>>>>> standard DVD. Full 4:2:2 from DVD is still lower res than many of
>>>>> today's displays.
>>>>
>>>>I know of no 1440x1152 pixel display available in the domestic market.
>>>>The
>>>>resolution that is required to best display the 720x576 pixel
>>>>information
>>>>off the DVD (which as what 4:2:2 gives - though the colour is 360x576).
>>>
>>> ??? Are you claiming that a 1440x1152 display is required to fully
>>> display the information from a DVD? If so, why?
>>>
>>
>>Because it is fact. If you record a signal containing 720 dots across the
>>width of the DVD, a 720 pixel wide diplay will not resolve it, displaying
>>only a continuous line.
>
> "720 dots" IS a continuous line. Hopefully you really mean 360 dots,
> each seperated by one pixel.
>
>>It requires a 1440 pixel wide display to resolve
>>the information as dots. Although this may not seem to square with most
>>peoples intuitive take on the issue, it is a matter of proven fact that a
>>digital picture will appear sharper when viewed on a display that has
>>twice
>>the number of pixels in each plane.
>
> I think you're on drugs, and that you pulled the 2X multiplier out of
> your rear-end.
>
> I do concede that that many consumer-quality displays will smear the
> image more than what their specs may indicate (the 360 dots in my
> example not being as well-defined as one would hope). However, your
> claim that you need a 1440x1152 display to resolve DVD is just wrong.
>
Please yourself. If you search through Wikipedia (I can't be arsed), there
is actually a good article on the subject, but it's not particualrly easy to
find.
>>Anyone who knows anything about digital
>>representation will know that the highest resolution in the digital domain
>>is half the number of digital samples (the Nyquist frequency) in this case
>>represented by the display samples.
>
> Bullshit.
One of the fundamental principles of digital techniques.
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