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Posted by WinField on 04/23/07 02:47
WinField wrote:
snip
>
> PDTV wrote:
>
>> No, my "silence" meant only that I don't visit the group often. Since
>> you were obviously looking for a fight, you felt it necessary to e-
>> mail me and reiterate your misinformation. Here is my response:
>>
>> Look, if you're so averse to "being talked down to", how about getting
>> your facts straight, or at the very least, provide evidence to support
>> the numbers you're posting.
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>>
>> DVD is 720x480 in NTSC and 720x576 in PAL... period. I don't see how
>> being an electrical engineer gives you the right to make up numbers
>> and post them as if you're writing an online reference manual. It may
>> give you the right to wire a hi-rise apartment building or a hotel,
>> but you obviously need to leave video to those of us who know video.
DVD is 720 x 480. PDTV is pissed off because folks seem to be trying to
convince him that 720 is equal to 540. As seperate unrelated numbers
there are not equal (of course).
But what if I wanted to look closer at 720, but only PART of it. Say
.... 3/4 (three-quarters) of 720. To get 3/4's of 720 -
720 x 0.750 = 540
Why would I go around confusing folks by referring to three-quarters of
720 - parroting 540 - when I still believe in the total quantity 720 ?
Answer: if I want to express 720 as "per picture height"
An American standard T.V. is wider than it is tall. 4 units wide and 3
units high [4:3]. 720 is the 4 units wide. What if I traveled 3/4's of
the way along this 4-units? How far did I get? 540.
So the number 540 can be directly compared to the VERTICAL resolution of
a standard 4:3 T.V. 540 equals 3-units (of 4-unit 720 width). And my
T.V. is 3-units high. I am comparing apples to apples.
Now you can go rewire that hotel, PDTV. =8~)
- Winfield
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