There are voice encoding schemes that require much less. I've experimented with this codec (for example), and found it quite good even at 3k bits per second: http://www.hawksoft.com/hawkvoice/
It's not lossless mind you, but quite intelegible and almost natural sounding. Artie Lekstutis KC2MFS >What would it take to provide a similar connection on HF? Assume you'll need >*at least* a 30kb data channel. Most of the protocols I have seen today will >get you about 2bits/hz on HF. That means you'll need at least a 15khz wide >data channel. > > > Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/