At Dayton last spring, we talked to Bruce Perens K6BP (HamRadioNow Episode 81) about FreeDV, CODEC2 and "The HT of the Future" -- all part of a fiendish plot to introduce open-source digital voice and more to Amateur Radio on both HF and VHF/UHF. At the 2013 DCC, he continued that theme, going deeper into the technology, though this isn't a highly technical talk. And yes, he takes on Yaesu's new VHF/UHF digital system, as well as D-STAR, MotoTRBO and all the systems with any proprietary components. Enjoy the ride!
See also: Mel Whitten and Dave Whiten's talk on FreeDV at the 2012 DCC (Episode 47), Chris Testa's talk on Handheld SDR (the HT of the Future, Episode 44), and David Rowe VK5DGR's talk on CODEC2 at the 2011 DCC at this long URL: