Compression Codecs

Jay_Feldis@logitech.com
27 Apr 95 09:44


[Text item: Compression Codecs]
OriginalPath:
I am also interested to know if CUseeMe will employ any kind of video
compression. I would think this would help reduce bandwidth and/or
increase frame rate.

I think that MPEG is not really suitable for real-time live video
however, becasue it works by looking at several frames at once and then
generating vectors to represent the changes to the image over a period of
time. As a result, you must store these frames long enough to do the
compression which would cause a significant delay in the transmitted
signal.

The emerging video conferencing standard for ISDN telephone connections
is ITU standard H.320. This is used by PictureTel and Vivo and many
others. I don't know if this can be used via PPP connection however.

There are a number of simpler compression algorithms that can give you
4:1 compression or so (executed in SW), this might not be too hard to
implement.

/Jay

Did ya guys read "Multimedia Today".... the article "MPGEG-2: New
World Standard for Digital Video"???????
WOW up to 200:1 compression!!!!!!!!!!!!!!!!!!!!
30:1 at TV quality....of course CD sound quality....
BACKWARD COMPATIBle with MPEG-!...
HEY YOU GOOD PEople at cuseeme DEvelopment, What do you think? can you
write something compatible with that codec?
For more information here's a number 180-IBM-0181, ext. 1502 or send an
email to JOHN G. Stamm at JSTAMM@vnet.ibm.com

CHILLS GOING UP MY SPINE!!! Exciting Stuff!
DisplaySubject: Compression Codecs