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The following archive was created by hippie-mail 7.98617-22 on Sat Apr 10 1999 - 01:18:27
Alex Alten (Alten@Home.Com)
Tue, 16 Feb 1999 22:57:33 -0800
At 06:12 PM 2/16/99 -0500, Lewis McCarthy wrote:
>Alex Alten writes:
>>>> I wouldn't call these lightening fast. For example compressed video over
>>>> a LAN requires a minimum enciphering speed of 20 MB/s, these barely cut
>>>> the mustard at 400 Mhz.
>
>Perry Metzger writes:
>> 1) Compressed video doesn't go that fast in typical applications.
>
>A colleague of mine who works on network video transmission says:
> "Assuming we are talking about streaming, acceptable broadcast quality
> full motion compressed video requires an average bit rate of about
> 4-6 Mbps (for MPEG-2). Below that the quality gets bad. A higher bit
> rate of course gives better quality."
>
Hmm...the trouble with quoting rates is the context. Basically my
understanding from a colleague of mine who is working on LAN video
transmission (between win95 boxes) is that decent frame rates requires
crypto that can encipher at 20 MB/s or better. I'm fairly sure it was
compressed. Probably the overhead of win95 reduces the amount of CPU
time available to do the encipherment thus requiring the cipher to be
efficient.
- Alex
--Alex Alten
Alten@Home.Com Alten@TriStrata.Com
P.O. Box 11406 Pleasanton, CA 94588 USA (925) 417-0159
The following archive was created by hippie-mail 7.98617-22 on Sat Apr 10 1999 - 01:18:27