Here's a modest proposal: compress most of the QSO the way the moonbounce modes do, by knowing what is expected at that point and expressing it in a few bits. For PSK, we could just standardize on macro names for a few things and the two modems can negotiate about whether to expand them on TX or RX.
Instead of sending "Your RST is 599" when the macro is RST the TX could just send "^RST" and the RX modem can expand this into "Your RST is 599." And if you send "^STATION ^BRAG" the RX program can just print "OM sent you a big list of his computer equipment." This might also eliminate a lot of the uppercase text as well... Leigh/WA5ZNU On Fri, 12 Jan 2007 1:02 pm, Rein Couperus wrote: > >> -----Ursprüngliche Nachricht----- >> Von: digitalradio@yahoogroups.com >> Gesendet: 12.01.07 17:09:44 >> An: digitalradio@yahoogroups.com >> Betreff: RE: [digitalradio] Re: Pactor versus Olivia > > >> By the way, I have often wondered why the B2F binary compression >> system >> used with the Winlink 2000 system has never been used for nearly a 2:1 >> compression for improved throughput. This could be applied to any >> system, including keyboarding. >> >> 73, >> >> Rick, KV9U >> >> > > Unfortunately this won't work. BZ2 compression is based on 'redundancy' > in a message. There is hardly any redundancy in short messages as used > in k-to-k. > > The only way you can do that is by using context-based compression, > like the 'context based huffman' compression in pskmail, which reaches > compression factors of 1 ... 50 : 1. > > Rein PA0R > > (by the way, it is open source). > > -- > http://pa0r.blogspirit.com > > > > Announce your digital presence via our DX Cluster > telnet://cluster.dynalias.org > > Our other groups: > > http://groups.yahoo.com/group/dxlist/ > http://groups.yahoo.com/group/themixwgroup > http://groups.yahoo.com/group/contesting > http://groups.yahoo.com/group/wnyar > http://groups.yahoo.com/group/Omnibus97 > > > Yahoo! Groups Links > > > > http://docs.yahoo.com/info/terms/
