HRN 193: Digital Voice is Exploding (maybe) on HamRadioNow

• published: 04 Mar 2015
• views: 235

"This will be the year" for digital voice to explode in Ham Radio. That's the prediction from David Rowe VK5DGR. David created CODEC2, the first open-source, really low bit-rate voice codec for amateur radio and more. He's got several projects cooking to make digital voice work better and for more uses, on HF and VHF/UHF. This program covers three related topics: - The SM-1000 "speaker-mic" for FreeDV on HF. - Improvements in CODEC2 and FreeDV aimed at making it work as well or better than SSB in weak-signal and noisy HF conditions - A new VHF system using TDMA for one-frequency repeaters that won't need in "input" frequency, and won't need a duplexer. David and Gary weave these topics into a conversation aimed at hams who don't use DV now, but are curious about what it might bring in the future. Links: David's Blog (details on FreeDV/CODEC2 development: http://www.rowetel.com/blog/ Interview with David on "Linux in the Ham Shack" http://lhspodcast.info/2015/01/lhs-episode-138-being-david-rowe/ David's 2011 talk on CODEC2 at the ARRL/TAPR DCC: http://youtu.be/bLb7stxOqmI The 2011 DCC's banquet talk - "The Village Telco" - David's project to provide extremely low cost telephone service in East Timore, Africa. http://youtu.be/1H1OVH1FwTQ