home *** CD-ROM | disk | FTP | other *** search
- Path: news.ultranet.com!usenet
- From: geneb@entropy.ultranet.com
- Newsgroups: comp.dcom.modems
- Subject: Re: Getting the most speed from a 14.4 modem
- Date: 6 Apr 1996 17:32:17 GMT
- Organization: UltraNet Communications, Inc.
- Message-ID: <4k69r1$rds@caesar.ultra.net>
- References: <4jssq7$2bg_002@aer01.mdc.net>
- Reply-To: geneb@ultranet.com
- NNTP-Posting-Host: entropy.ultranet.com
- X-Newsreader: IBM NewsReader/2 v1.2
-
- In <4jssq7$2bg_002@aer01.mdc.net>, aer01@netway.mdc.net (Reaperman) writes:
- >Please help. I am trying to get my modem to download files faster. Text files
- >download at a very satifactory rate. Is their any thing I can do to get this
- >thing to download graphic files faster. It's a Packard Bell 14.4 am/sp
- >fax/modem/soundcard also I am running WIN95 on a 486dx2 66mhz Packard Bell
- >Legend 204CD. Will changing the connect speed in control panel or dial up
- >networking make it download faster? Any help will be greatly appreciated. A
- >newbie desperately seeking knowledge from a modem guru.
-
- The reason that text files appear to download faster is because the modems
- are applying data compression, so that the character-per-second (cps)
- rate is very high. Graphic files (.GIF and .JPG) are already highly
- compressed, so that the modems are unable to compress them further.
- If you calculate how many "bytes" of information are actually in a .GIF
- file (multiply the width in pixels by the height in pixels by the color
- depth, where 256 colors=1 byte, 65K colors=2bytes, "truecolor"=3 bytes),
- then divide by the transfer time in seconds, you'll find that it is as
- efficient as text...
-
- --Gene
-
-
-
-