Just to make sure we carry some Elecraft content you might like to look at the following URL's
http://www.rowetel.com/blog/?p=4584 http://www.areg.org.au/?p=1719 And the code for both the Codec2 and FreeDV is freely available here; https://github.com/freedv 73 Matthew VK5ZM On 18 September 2015 at 14:23, Walter Underwood <[email protected]> wrote: > FreeDV is open source. You can use the FreeDV API ( > http://www.rowetel.com/blog/?p=3469 <http://www.rowetel.com/blog/?p=3469>) > or get a box that will implement it and can be updated with new protocols ( > http://www.rowetel.com/blog/?page_id=3902 < > http://www.rowetel.com/blog/?page_id=3902>). Or you can download the > FreeDV app. Or download the source, either one from here: > http://freedv.org/tiki-index.php <http://freedv.org/tiki-index.php> > > Dave Rowe (VK5DGR) is actively improving both the HF and VHF variants of > FreeDV, with very interesting articles on his blog. He’s working on a low > bitrate version for nasty HF signal paths (FreeDV 700), and is working on a > VHF digital voice mode with two levels of fidelity always transmitted. When > you get more signal, you get more fidelity ( > http://www.rowetel.com/blog/?p=3931 <http://www.rowetel.com/blog/?p=3931 > >). > > Here are some samples of the current 700 bitrate codec: > http://www.rowetel.com/blog/?p=4291 <http://www.rowetel.com/blog/?p=4291> > > And some A/B comparison QSOs with SSB and FreeDV: > http://www.rowetel.com/blog/?p=4527 <http://www.rowetel.com/blog/?p=4527> > > Dave is doing some very exciting stuff, I’m impressed. And it’s all free. > > wunder > K6WRU > CM87wj > http://observer.wunderwood.org/ (my blog) > > > On Sep 17, 2015, at 8:41 PM, Don Wilhelm <[email protected]> wrote: > > > > There are advantages to digital voice, but for Amateur Band use, I don't > think we are "there yet". When we see an 'open source' digital voice mode > that is published and can be implemented by any amateur, then I may change > my position, but that is not the situation today. I do not believe that > proprietary modes of any sort should be permitted on the ham bands. > > > > One characteristic of digital streaming 'anything' is that if the signal > 'loses sync', things go to pot, and you have to wait until it syncs up > again. With fading on an analog signal, you can usually fill in the gaps, > but with digital, it is all or nothing. When it is "all", it is great, but > the gaps are annoying - plus the quality is determined by the bit rate in > the encoding/decoding algorithms. > > > > 73, > > Don W3FPR > > > > On 9/17/2015 11:16 PM, Sandy wrote: > >> I could not agree more Don! There isn't much advantage for amateur > radio to digital voice operations. Just another "kink in the wire"! > >> No advantage at all. All the digital voice stuff I have heard sounds > terrible at times. Motorola's system (proprietary no doubt!) can sound > >> absolutely awful when signal conditions are bad. > >> > > > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[email protected] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to [email protected] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
