[opendtv] Re: Mediaflo Technology
- From: Mark Schubin <tvmark@xxxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Sat, 11 Nov 2006 09:02:07 -0500
Craig Birkmaier wrote:
Looks like Tom caught you here Mark.
You can't compare apples with oranges. We are talking about Nyquist
limited images in both cases - i.e. video.
As I pointed out, the edges of the smallest elements of a display
violate Nyquist.
I refer you to the title of Dr. Alvy Ray Smith's Technical Memo "/A
Pixel is /Not/ a Little Square, a Pixel is /Not/ a Little Square, a
Pixel is /Not/ a Little Square! (and a Voxel is /Not/ a Little Cube)."/
http://alvyray.com/Memos/default.htm
The fact remains that in an analog system of ANY bandwidth, the peak (or
trough) of a sine wave is infinitely positionable (though the precision
and repeatability could be difficult). In a digital system of ANY
number of samples, the position of a white (or black) sample is limited
by the number of samples.
As a practical matter, low-bandwidth analog spread, high sample numbers,
and Nyquist violations make calculations difficult.
TTFN,
Mark
----------------------------------------------------------------------
You can UNSUBSCRIBE from the OpenDTV list in two ways:
- Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org
- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word
unsubscribe in the subject line.
Other related posts:
