[Radium[_4_]]

Hi:

I started a new thread because the previous one started to go into
tangent of digital vs. analog but was filled with emotions and
personal vendettas rather than science and logic. So I changed the
thread.

Anyways, Adobe Audition and voice-changers allow the frequencies of an
audio signal to be shifted w/out low-pass filtering or changing the
tempo. There are two video-equivalents of this because, while audio
has only one frequency component [temporal], video has two [temporal
and spatial].

The temporal video-equivalent would be changing the rate of back/
forth, up-down or other repetitive/cyclical movement [such as wing-
flapping or flickering of lights] of the video signal without high/low-
pass-filtering, separating any portion of the video signal, or
changing the speed at which the video-signal -- just as voice-changers
can lower the frequency of audio without changing the speed of the
audio. Using a voice-changer to decrease the pitch your voice will not
cause your speech to slow down.

The spatial video-equivalent would be changing the "sharpness" of a
still image without high/low-pass-filtering or changing the size of
the image.

Below is an example of low-pass-filtering in the spatial domain:

Here is an original pictu

http://www-dse.doc.ic.ac.uk/~nd/surp...ormalimage.jpg

Here is the picture after low-pass filtering:

http://www-dse.doc.ic.ac.uk/~nd/surp...ort.lopass.jpg

I obviously do not want this at all. Low-pass filtering involves
removing high-frequency components while preserving the low-frequency
components. Once again, this is not what I want. If a device cannot
handle high-frequencies, then I would like all the frequencies of the
signal to be down-shifted until the highest frequency is low-enough to
be acceptable to the device. This down-shifting should be done w/out
slowing the speed of the signal -- or in the case of spatial
frequency, w/out increasing the size of the image.


Thanks for your assistance, cooperation, and understanding,

Radium