[opendtv] Re: 2.35:1 on 16:9 screen (was: Mobile TV coming of age)
- From: "Barry Wilkins" <Barry.Wilkins@xxxxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 15 Jul 2004 09:32:53 +1200
Jeroen,
Please excuse a degree of naivety and ignorance on my part. I am not
familiar with picture encoding for DVD. Therefore what follows is
presumption.
Regarding the availability of 16:9 content, I mean pan and scan, ie.
16:9 non letterboxed. We do not get a lot of this format here,(New
Zealand). So, my understanding is, the DVDs are encoded with a
widescreen image to preserve the theatrical aspect. This I presume,
means that data bits are used only where there is picture information.
To then expand this 2.35:1 aspect information to fill a 16:9 screen
proportionally will I imagine reduce the resolution dramatically because
for the screens dimensions there is a large loss of mainly horizontal
pixel information.
Cheers
Barry
-----Original Message-----
From: jeroen.stessen@xxxxxxxxxxx [mailto:jeroen.stessen@xxxxxxxxxxx]=20
Sent: Wednesday, 14 July 2004 11:10 p.m.
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: 2.35:1 on 16:9 screen (was: Mobile TV coming of
age)
Hello,
Barry Wilkins asked:
> I have a question about the latest Philips 42PF9966 42" plasma TVs.
Not to be mistaken with the Philips 42PF9986 42" LCD TVs !!
> It concerns the ability or otherwise of being able to expand a
> 2.35:1 aspect image to fill the screen vertically while retaining
> the correct proportionality of images, i.e. simply eliminating
> some of the width to result in 16:9 aspect.
There is no such thing as "simply eliminating some of the width" !
Only when there are empty side pillars, or when the picture content
is protected by pan-scan vectors, could one safely cut off some of
the side information. We have chosen not to do this in our TVs.
> I find the present models will not allow this.
Have you ever seen a consumer TV/monitor/display that does this,
other than by setting up the geometry through some expert menu ?
> They either fill the screen but distort the images horizontally,
Yes, in the "automatic aspect ratio adaptation mode" it will do
vertical zoom up to an aspect ratio of 18:9. The width remains
constant. The source sends out a 16:9 signal, so the aspect ratio
will then be distorted by a maximum factor of 18/16 =3D 1.125.
> or you have the black bars top and bottom.
As it was written on the DVD... The source is the boss !
> I know that many people may prefer to see the whole width but
> I would be perfectly content with a larger image that made full
> use of the screens proportions.
I don't know that. I only remember fierce discussions in this list
about the harm of having a few percent of overscan. This is not a
subject that I would like to burn my fingers on again. ;-)
> So, does this new model allow proportional expansion in both planes?
No, unless maybe in the service menu. But not as you would like it.
> Do you know if there will be a larger content of source material
> in 16:9 aspect? I find that documentaries/drama on DVDs from the
> UK/Europe have a larger proportion of 16:9 content. Also, the
> quality is generally perfecto!
From where are you calling ? 90% of my DVD collection is in 16:9
"anamorphic" format, and a good part of that still has some black
bars on the top and bottom. The prices are according to the quality.
I want to buy Season 7 of "Buffy", a 6-disc DVD set, uncensored (!),
16:9 and all, but the price of 90 Euro (approx. 110 dollar) is still
holding me back. Here you get what you pay for.
(Craig, is Santa subscribed to OpenDTV too ? Santa, do you read me ?)
> I am very interested in one of these new screens but it is a large
> investment for an item that for the majority of the time may not be
> utilized efficiently in terms of picture height.
You want to wait for screens that are wider than 16:9 ?
That should draw Craig into an interesting discussion... ;-)
It shouldn't be too difficult to write software for controlling
the scalers to do what you want, but I doubt that our product
management would see that as a wise move. I could suggest it.
> The resolution of the 42PF9966 is I think 1366 X 768. This must be an
> NEC type display rather than the Fujitsu 1024 X 1024 type used in
> earlier models. Is this prefered because the Alis screen was
interlaced
> and the new one progressive?
No, you are confusing it with the 42PF9986, which is a 42" WXGA LCD.
The 42PF9966 has the 1kx1k ALiS. There is a 50PF9966 50" WXGA plasma
with a NEC display. There is no ALiS available in that size.
Greetings,
-- Jeroen.
|-----------------------------+---------------------------------------|
| From: Jeroen H. Stessen | E-mail: Jeroen.Stessen@xxxxxxxxxxx |
|-----------------------------+---------------------------------------|
| Building: SFJ-5.22 Eindhoven| Philips Digital Systems Laboratories |
|-----------------------------+---------------------------------------|
| Phone: ++31.40.27.32739 | Visiting & mail address: Glaslaan 2 |
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