interlaced video

C. R. Coberley (carter@beta.inc.net)
Tue, 29 Jan 1991 14:14:17 -0500


I am new to this list so forgive me if this has been mentioned before.

I am not sure if this suggestion is even feasible, given the way the
CU-SEEME updates the images (based on what part of the image is moving).
However, my quesstion is this:

What about including an option that would allow users to send / receive
interlaced video (i.e. send / receive every other line of video)? Is this
possible?

I don't know how difficult this would be to implement, as I am not a
programmer. However, I have seen this approach used to speed up video in
several graphics applications / games.

As I have been using CU-SEEME successfully over a 28.8 Kbps PPP connection,
and I am sure there are other users who have connections with limited
bandwidth, this might make the video faster. By effectively reducing the
amount of video data to 1/2, I assume this would speed up tranmission rates
(please correct me if I am wrong, as I said, I am not a programmer).

This could also then allow greater bandwidth for audio, which is often very
choppy over a 28.8 Kbps connection. Of course, I realize that this approach
would compromise the video quality a little bit. However, I think many
users would be willing to sacrifice a bit of clarity for more fluid motion
/ faster screen updates.

As I said, this could be included as an option, so that users with higher
bandwidth could still send and receive non-interlaced video (except of
course, they would receive interlaced video from those users transmitting
it). Perhaps it would then be possible to implement something into the
reflector software that would detect those users requesting only interlaced
video data, and then transmit only overy other screen line to them.

I realize that CU-SEEME only tranmits those portions of the screen that are
moving, but would it be possible to implement this "interlacing" feature on
the individual screen segments that CU-SEEME works with?

Once again, thanks for listening and I apologize if this idea has been
mentioned before. I don't have a lot of technical knowledge about
computers, so please excuse any faulty assumptions or misconceptions on my
behalf.

_______________________________________________________
C. R. Coberley carter@beta.inc.net
7900 Harwood Avenue, #110 (414)771-8453 phone
Wauwatosa, WI 53213 (414)771-8453 fax
_______________________________________________________