Re: scaling on a 4:3 tv
3. shumway Jan 30, 2:27 am wrote:
It is an inexpensive TV to meet the needs of TV now, which with a very
few
exceptions is really 4:3. At any rate I think you have stretching
confused
with scaling; I do not want to want to do any stretching. I was asking
about the scaling. Obviously when a 16x9 picture is rendered in
letterbox
it is scaled (but not stretched). When the same picture is clipped to
be
placed on a 4x3 screen no scaling is needed. My question is would it
be
down-scaled, then clipped, and then upped-scaled (causing a loss in
resolution, but no distortion) for some reason?
Reply
I'm afraid you are so confused by all these terms and techniques
that it may be impossible to answer your question. I will try
however. Letterbox is not an aspect ratio. It is simply a format
where they adjust by scaling the width of the picture to fill the
screen from rt. to lt. When I say properly display, that means, no
stretching, no clipping, no loss of picture content, no pan & scan,
no fooling around with the shape or content period. When ever a
picture is shown on a screen with the wrong aspect ratio there will be
a loss of resolution. A tv screen is only capable of a fixed amount of
resolution. So many pixles up and down and so many pixles lt & rt. It
the picture does not fill the screen then there is a loss of resolution
on that display device. Much of the problem can be laid at the foot of
the people trying to sell you something that's really no good. Full
screen vhs is really pan & scan and they are only selling you 60-70% of
the movie. Widescreen vhs is the total picture but because it doesn't
fit the aspect ratio of our tv screens we lose display resolution.
Almost all of the neat things that tv manuf. are providing in new sets
to fill out the display distroy the picture. Zoom and fill are key
words that indicate they are messing with the true picture.
I am currently watching tv on a 4 x 3 screen. I have a hd rec.
When I watch hd broadcast I have black lines on the top and bottom so I
am losing resolution on my display device. When they show a 4 x 3
picture in hd I have black lines on the top and bottom and lt and rt.
so I am losing even more resolution. Still my point is, 4 x 3 is now
obsolete. If you want a cheap tv buy one from somebody that just got
his new 60" DLP.
Just understand that with a 4 x 3 screen you will never get the full
benifits of HDTV .
.
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