Hi Gullik,
On 24-05-12 05:19, Gullik Webjörn wrote: >> Question: >> Does anybody see a reason to support bitrates other then the four >> available in option 2? >> > Since this is a spec, why not? I think the basic idea of a sampling rate > of 48000 is good, but why not allow 96000 and 192000 as well, allowing > extension of the spec? After al, hw is available. 48000 should of course > be the "basic standard", since that is supported by all hw. I'm a bit hesitant about that. The problem is that specification create expectations. Quite some people read specification with only half an eye. They see "19200 baud" and "C4FM", so next thing is them will start to make assumptions that VHF codec2 modem will be able to carry 38400 bps. For me, a specification is a technical document and should describe what actually exists, or what can reasonably be expected will exist. A specification is not a "wish-list" or a marketing document (as yeasu seams to think :-) ). I like to differenciate the (very interesting) discussion we have here in this list, and the formal specification-document. The serve a very different purpose. >> Does anybody see a reason to add C4FM in this version of the specs? >> (appart from "I want everthing"). >> > I think so, we are mostly discussing software implementations of the > codec2, fdmdv protocols, initially on a "PC" but soon on a MCU. > Being careful and anticipate evolution, will allow this to become > "a family of digital modes" rather than a "dstar competitor". True, but if somebody would come up with something that is not yet in the specification, we can always write an addendum. :-) > >> One final remark: > Understood, 4800 is fine! > > One comment to the polarity discussion: > > Would it not be a good idea to SPEC that bit encoding is differential, > i.e. no change = 0, change = 1 (ore somesuch) , which will eliminate all > polarity issues? Was that not part of the bit encoding of AX25, for > exact that reason? > > My 2 cents worth... > > SM6FBD > > > ------------------------------------------------------------------------------ > 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
