... further development is always wise and neccessary. But we need no
KISS or LITE approaches. FreeDV competes primarily with SSB. Due to
today' s excellent natural sound of RADE, especially also of RADE V2,
more and more hams stream into the freeDV camp. 5 - 6 dB SNR gain
compared with SSB is another strong argument for DXer. Three of these
powerful freeDV channels inside the bandwidth of one SSB channel is real
innovation and performance. Don't reduce these benfits.
73, Helmut, DC6NY
Am 20.09.2026 um 22:45 schrieb Bruce Perens via Freetel-codec2:
Some recent ham radio digital voice CODEC development which I have
guided the AI through:
AMBE for all ham radio modes except System Fusion: D*STAR, DMR, NXDN,
etc., with the AMBE-2+ modes compiled out by default until some
patents expire in another 3 years. 0.97 or better compliance validated
against an AMBE 3030 chip (1.0 is best) when in chip-compatible mode,
non-chip-compatible is the default and handles bad packets without
squeaking and doesn't emulate chip bugs. Also IMBE for Project 25
phase 1. Both floating and fixed-point implementations in Rust:
https://github.com/BrucePerens/hams_open/tree/main/daemons/ham_digital_modes/src/ambe
Codec2 In fixed-point Rust, 0.9999 compliance with the float C version:
https://github.com/BrucePerens/hams_open/tree/main/daemons/ham_digital_modes/src/codec2_3200
1600:
https://github.com/BrucePerens/hams_open/tree/main/daemons/ham_digital_modes/src/codec2_1600
C API for 3200 Rust, we can extend this for 1600:
https://github.com/BrucePerens/hams_open/tree/main/daemons/codec2_3200_capi
What's next? An attempt at RADE without machine learning. Might not
sound as natural, but could work well enough to be compatible.
--
Bruce Perens K6BP
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