Re: Upconverting question


"ninphan" <sjburke73@xxxxxxxxxxx> wrote in message
news:1182948725.806424.121180@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Jun 27, 7:37 am, "Leonard Caillouet" <nos...@xxxxxxxxx> wrote:
"ninphan" <sjburk...@xxxxxxxxxxx> wrote in message

news:1182881394.943419.293170@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

No, you can send a 480p signal to a television that will display the
480p signal.
Not all televisions have built in scaling.
One's that don't that have resolutions stated represent the
resolutions the television set is CAPABLE of displaying.
All Sony XBR HDTV's for example have upscaling in them. My friend's
61" Teshiba DLP does not. You can change the output of the PS3 from
1080i to 480p and see the difference in the menu on the screen.
Again, televisions do not automatically upconvert inputs to whatever
they are capable of displaying, they list the resolutions to show you
what signals they can accept.

Your friends Toshiba DLP does indeed upconvert everything it gets. The
only
sets that do convert scan rates to their native resolution are multiscan
CRT
based sets that can do more than one scan rate. Fixed pixel displays
have a
native resolution and everything that they display has to be scaled to
that
resolution. Period. You might check your fact before stating them like
you
know what you are talking about.

Leonard

Actually no it doesn't. If you read the manual you'll know what I'm
talking about. There's a reason people buy televisions that have built
in scalers. Go to AVS and state your thesis and see how many people
come in and rebut your incorrect statement.
When you have a 480p signal coming in the uppermost right-hand pixel
goes to the uppermost right-hand corner, the lowermost left-hand pixel
goes to the lower-most left-hand corner. There is no 1:1 pixel
mapping, instead it is more like 6:1. That is not upscaling. Upscaling
processes the image and will smooth out the transition between one
pixel and the next and in effect try to create 1:1 pixel mapping. That
is what an upscaler does. Many sets do not do this, they merely
display the image depending on the input signal.
Merely filling the screen is not upconverting. This much is evident
when switching between a 480p source and a 1080p source.

You are simply WRONG.

If the native display of a DLP is 720, ALL signals that it accepts are
scaled to 720. If the set is a 1080 display, ALL signals that it accepts
are scaled to 1080. You can state otherwise as emphatically as you please,
but it does not change the way the sets work. I post on AVS all the time,
as well as here. People here and there know me and know that I have
extensive training and experience on these technologies and respect the fact
that when I say something, it is usually backed up by facts. Scaling is
present in virtually every HD set on the market. Some do it poorly, some do
it better. They chipsets have become pervasive and cheap, to the point that
very inexpensive DVD players have them. Scaling could more correctly be
called resampling, as that is what is actually done, along with some rather
sophisicated digital filtering.

Leonard


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