RE: [Deinterlace-discuss] Is a non-linear stretch mode planned?

[Paul S. <psi...@in...>]

To add to the point :

I have a very similar HDTV model, the Philips 55PP9701, with the only
differences being the size and the lack of an integrated ATSC tuner.
So, I can expand a little bit on what Steve proposes.

The Philips models offer a few of the "standard" widescreen "stretch"
modes, and like many other manufacturer's sets, the only operate in the
interlaced mode.   Once a progressive or HDTV input is selected, you're
stuck in HDTV/progressive-squeeze mode.   No aspect ratio manipulation.
So, this isn't a problem unique to Philips, but to most HDTV sets.

1. Standard 4:3 mode : 4:3 frame with black bars on the sides of the image
2. 16x9 mode : do the anamorphic squeeze
3. Theater-1 : zoom in on a 4:3 image which contains a 1.85:1 letterbox
4. Theater-2 : zoom in MORE on a 4:3 image which contains a 2.35:1 letterbox
5. Panoramic : approximately the middle 1/2 of the 4:3 image is left
               intact, while the outer 1/4's of the image on either side
               are "streeeetched" to fill the rest of the raster and
               prevent the need for any bars.   The further towards the
               edge you go, the more stretch is introduced.

I view all 4:3 source material in the Panorama mode.  The stretching
on the sides isn't too objectionable, and you don't lose any of the
original source frame (as you do in the Theater-X modes).

(BTW, the Philips already incorporate an "orbit" feature.
Automatic Phosphor Aging Compensation – APAC.)


I think this would be a big win for all widescreen users of dTV.

However, given that there would have to be a field-by-field
manipulation in order to do some kind of stretch function on
the source data, how much additional CPU horsepower would this
require ?    Quite a bit, I might imagine.

Would be nice, though...


Paul Simoneau
Integral Access, Inc.
psi...@in...




> -----Original Message-----
> From: dei...@li...
> [mailto:dei...@li...]On Behalf Of
> Daniel Schmelzer
> Sent: Monday, January 08, 2001 10:34 PM
> To: dei...@li...
> Subject: [Deinterlace-discuss] Is a non-linear stretch mode planned?
>
>
> Hi All--
>
> Interesting requests from SteveT on AVS Forum at:
>
> http://www.avsforum.com/ubb/Forum12/HTML/006836.html
>
> "First, let me say thanks to all the dTV developers for making
> this awesome
> piece of software available. This work of art the rivals (and in
> many ways
> is better than) the Genesis de-interlacer in my Philips 64PH9905 HD
> RPTV--particularly with dss and video game sources.
>
> I have a question however, regarding the "stretch" mode. Since
> the majority
> of dss programming is in 4:3 AR, I have gotten quite used to using the
> 9905's "Panoramic" video mode. This mode stretches the edges of the image
> but leaves the center untouched. The result of this non-linear
> stretch is a
> good alternative to viewing 4:3 material on a 16:9 screen. And while not
> perfect, it is far less distracting than a linear stretch where
> the entire
> image is stretched horizontally. I believe the type of viewing mode is
> standard on most, if not all HD and HD Ready sets. IMHO, it would be a
> wonderful addition to dTV's feature set.
>
> On a similar topic, are there any plans to incorporate any form of image
> "orbiting" (a la yXy) to reduce image burn-in when watching
> letterboxed or
> side-paneled material?
>
> Thanks again for the wonderful work!
>
> Regards -- Steve"
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