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Posted by Rick Merrill on 02/01/07 19:57
SFTVratings_troy@yahoo.com wrote:
> David wrote:
>> "Andrew Rossmann" <andysnewsreply@no_junk.comcast.net> wrote in message
>> news:MPG.202aceb5f9bbf0eb989892@newsgroups.comcast.net...
>>> In article <D_6wh.832427$5R2.679581@pd7urf3no>, stuart_miller@shaw.ca
>>> says...
>>>> <SFTVratings_troy@yahoo.com> wrote in message
>>>> news:1170274597.382084.36170@k78g2000cwa.googlegroups.com...
>>>>> For comparison other standards are:
>>>>> 240 - VHS (ditto Betamax)
>>>>> 330 - NTSC broadcast
>>>>> 425 - laserdisc (ditto S-VHS)
>>>>> 540 - DVD
>> Please note that the horizontal resolutions for all of these are not
>> expressed in pixels, but expressed in "lines of resolution per picture
>> height". ...
>
> "pixels per picture height" would also be a valid expression.
>
>> This is the standard method for defining analog resolutions in the
>> 4:3 format. To get to pixels (approximately), these numbers have
>> to be multiplied by 1.333.
>
>
>
>>From edge-to-edge of screen:
> 321 - VHS (ditto Betamax)
> 440 - NTSC broadcast
> 565 - laserdisc (ditto S-VHS)
> 720 - DVD
>
Hang on, 'resolution' is the number of tiny dots while 'pixel' is the
smallest unit of, well, picture. On many displays the number of
phosphor dots is several times the number of pixels. Now on a 1080i
screen with HD TV they are about equal. Anyone have had data to clarify
this?
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