ARLA/CLUSTER: HamRadioNow: Comunicações em Voz Digital aumentam exponencialmente nas banda de amador

[João Costa > CT1FBF]

HamRadioNow: Digital Voice is Exploding

'This will be the year' for digital voice to explode in Amateur 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 Rowe VK5DGR and Gary Pearce KN4AQ 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.

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


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