TV Screen Sizes (slightly OT) 2004-02-16 - By Dave Angelini
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Jason,
Thanks for the information. BTW: I did not mean that I did not understand
those terms, rather the process of dealing with them all and assimilating
the information gave me a headache. Nevertheless, you provided a very good
summary for those who have yet to venture into these waters.
...and you thought picking a good 3D application and renderer was difficult
and open to debate!!! Hah!! At least there you only have around 10 packages
to choose from!!!
Where is the aspirin....my headache has returned.
Dave Angelini
-- -- Original Message -- --
From: "Jason Lechak" <frootee@(protected)>
To: <truespace@(protected)>
Sent: Monday, February 16, 2004 10:01 AM
Subject: Re: [TSML] TV Screen Sizes (slightly OT)
> Hi Dave. Couple of bits of info:
>
> HDTV is High Density Television. This is supposed to be the next standard.
> Currently there are not too many stations that support this, but you do
get
> a sharper image, and I think you have to pay for the stations at this
time.
>
> DVI stands for Digital Video Input. Most flat panel LCD computer monitors
> come equipped with this type of input.
>
> 720P means, 720 columns of resolution, P means, progressive scan. 1080I
> means, 1080 columns of horizontal resolution, and I means, interlaced.
> Progressive scan gives you a clearer picture, because both the odd and
even
> horizontal screen lines are redrawn with each screen refresh. Interlaced
> means, in one screen refresh, all the odd lines are refreshed, then in the
> next refresh, the even lines are refreshed. This is the old way of
> refreshing TV video, because back in the olden days TV systems were not
> fast enough to refresh the entire screen each time. This is quite similar
> to PC monitor refresh rates and terminology.
>
> Component video means, the Red, Green, and Blue video components are kept
> separate; you have 3 separate cables. This offers enhanced color
> resolution. The lowest quality video is called composite video, where all
3
> color streams are combined into one cable. S-Video is in between composite
> and component video, in terms of quality.
>
> NTSC is the U.S. standard for television refresh rates. The other method,
> mostly used in Europe, is PAL. NTSC refresh rates are at 29.97 frames per
> second, whereas PAL rates are 24, I think. So NTSC just means, you can use
> the TV in the US.
>
> widescreen is typically 16:9 aspect ratio, which is close to movie theater
> aspect ratios. In other words, the widescreen TV looks like a mini theater
> screen.
>
> In comparing widescreen (16:9) and 4:3 ratio TV's, 16:9 just looks like a
> movie theater.
>
> So, in going to a 16:9 TV, you get a more realistic movie-going
experience.
> Progressive scan offers a clearer picture over interlaced, since all
> horizontal lines are refreshed each video frame. Also look for digital
comb
> filters (3 line are good). I am not sure if these are required or even
> included in these newer tv's, but the filter acts as a smoother between
> horizontal lines. Component video is a great feature if you have a dvd
> player and/or VHS player with component video outputs. You get a great
> picture from your dvd player, especially. The prices for widescreen tv's
> are getting lower each season. I think you can still get quite a bit of
> mileage out of a standard 4:3 TV, with digital comb filter, if applicable,
> with component video inputs. I got one for $250 a couple years ago. Oh,
> BTW... standard, 4:3 ratio TVs have a lower screen resolution than the 720
> and 1080 ones.
>
> HTH,
>
> Jason
>
>
>
> At 09:47 AM 2/16/2004 -0800, you wrote:
> >I recently decided to venture into the world of shopping for a new TV.
In
> >short, it gave me a headache. But along the way, as I was drowned in a
> >bunch of new acronyms (HDTV, DVI, 720P, 1080i, XBR, Wega, Component
video,
> >aspect ration, widescreen, NTSC), I decided to boil it all down to a few
> >simple questions:
> >
> >1) How big is the screen?
> >2) How sharp is the picture?
> >3) How much am I paying?
> >4) What am I getting over my current 27 inch, 12 year old TV?
> >
> >What I found interesting is that there was really no comparisons done on
> >screen sizes between Widescreen (16:9 aspect ratio) and NTSC or normal
> >screens (4:3 aspect ratios) for any given diagonal measurement. Given
that
> >TV manufacturers only quote screen sizes in terms of their diagonal
> >measurement, this was rather frustrating. Exactly what am I paying $1000
of
> >dollars for in the big tube TV's and how much bigger will it be over what
I
> >have now?
> >
> >And this is where tS came in rather handy. Thus I made the following
render
> >for my own purposes, but I thought it might be handy to others:
> >
> >http://home.comcast.net/~dianeangelini/Stills/TV_Screen_Sizes.jpg
> >
> >Some other simple tips for the interested consumer can be found here:
> >
> >http://home.comcast.net/~dianeangelini/tv_tips.doc
> >
> >A good source of information is also here:
> >
> >http://www.hdtvinfoport.com/hdtv-buyers-guide.html
> >
> >So what did I decide? Well, after my headache cleared, I got so
disgusted
> >with the whole experience I decided to wait one more year.
> >
> >I hope this is of help to others.
> >
> >Thanks,
> >Dave Angelini
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