Xref: utzoo comp.dcom.modems:8562 comp.mail.uucp:5965
Path: utzoo!mnetor!tmsoft!torsqnt!hybrid!scifi!bywater!uunet!shaman!jiro
From: jiro@shaman.com (Jiro Nakamura)
Newsgroups: comp.dcom.modems,comp.mail.uucp
Subject: News compression and T2500's
Message-ID: <1991Mar3.213145.6760@shaman.com>
Date: 3 Mar 91 21:31:45 GMT
Sender: jiro@shaman.com (Jiro Nakamura)
Organization: Shaman Consulting
Lines: 19

Folks -
   I was wondering about CNews compression formats and what was the most
efficient way to transport news. If my memory serves me correctly, Cnews
using compress (1) to compress the news batches, and compress uses a 
Lempel-Ziv compression format.
   Now..... I was wondering if it might be more efficient to *not* pre-compress
the news at the *system* level, but let the modem do the compressing itself.
I think PEP compression is LZW (right?) and therefore equivalent to 
compress, but isn't v.42 LAP-M compression more efficient that LZW? If so,
then wouldn't it be better to not compress batches and let the LAP-M do
the dirty work for us?
  Any one have any comments?

	- jiro nakamura
	jiro@shaman.com
-- 
Jiro Nakamura				jiro@shaman.com
Shaman Consulting			(607) 253-0687 VOICE
"Bring your dead, dying shamans here!"	(607) 253-7809 FAX/Modem