Hello Bruce & List, Some ideas of what a significant improvement over incumbent (analog and 1st gen DV) modes might be:
+ 6-12dB improvement in SNR for equivalent voice quality + half or a quarter of the RF BW + available in a $100 open hw/open sw box that sits between the Mic/Spkr of any FM (VHF) or SSB (HF) radio (say Raspberry Pi based) + wideband audio (8000 Hz BW rather than 300-2600 Hz) + completely open source Cheers, David On Fri, 2012-05-11 at 10:57 -0700, Bruce Perens wrote: > On 05/11/2012 02:34 AM, Peter wrote: > > The documentation I'm working on (it stalled a bit lately, as I've > > had some busy days of work, and a fair few other things stealing my > > time away) works with the same GSMK modem as D-star (using ON1ARF's > > modem implementation as a reference). But with different sync > > markers and frame layout. A lot of the error correction/bit > > scrambling ideas are being lifted straight from D-star specs (again > > with adjustments to suit the 2500 codec bit rate). > Hm. Why 2500 rather than one of the lower rates? And is the 1:1 > FEC-to-data ratio of D-STAR really necessary? > > If we don't offer a significant improvement over D-STAR, it's not > going to get acceptance. What would those improvements be? They would > need to to be something like "half the bandwidth and double the > effective power", rather than more subtle changes. Just the fact that > it's free and open doesn't matter to users. > > Thanks > > Bruce > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ Freetel-codec2 mailing list > Freetel-codec2@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
