Hi Alan, HF would definitely be interesting, but right now I'm focused on VHF/UHF. My understanding of the GD77 family is that the modulation (DMR, two slots per channel) is in hardware, so the best we can do is drop in a different CODEC, but we could have to use the same data rate and RF modulation.
On Mon, 1 Feb 2021 at 20:40, Al Beard via Freetel-codec2 <freetel-codec2@lists.sourceforge.net> wrote: > > Hi Eric, > > If the radio GD77 and clones did HF, I'd be super interested!! > > "In my view" we have neglected the need for "semi-secure" voice > comms over HF. HF because there are many many areas where VHF/UHF > does not cover. > > Also "In my view" on VHF and UHF we have not, in "Digital Voice", > Codec2 in particular, realised the extended ranges made possible > with lower bit-rates. > > eg. The "M17project" went for the Codec2 3200 mode and in their > protocol, all but locked out rates lower than 1600. And in the > 1600 implementation, the intention was data to fill the available > bits/bytes leading up to the same 3200 radio data rate. > > My 2c. > > I do say to the developers, keep up the good work. > > Alan VK2ZIW > > On Mon, 1 Feb 2021 17:50:17 -0500, Eric Jacksch wrote > > Greetings, > > > > Has anyone looked at dropping Codec2 into OpenGD77? > > > > In case anyone is not aware, OpenGD77 is a (mostly) open source > > firmware replacement for several low cost handheld two-way radios, > > including the GD-77 (aka TYT MD-760). > > > > To work around intellectual property issues, the firmware currently > > links in the DMR CODEC from the original vendor's binary. > > > > While it would break compatibility with other DMR radios, I'm > > interested in seeing a fork of OpenGD77 that is fully open source and > > Codec 2 seems like an obvious candidate. A truly open-source amateur > > VHF/UHF digital mode. > > > > The IDE (MCUExpresso) and complete toolchain for OpenGD77 is free and > > relatively straightforward on Windows, and the firmware is written in > > C. What's needed is the Codec 2 expertise. > > > > Anyone interested? > > > > Cheers, > > Eric > > > > _______________________________________________ > > Freetel-codec2 mailing list > > Freetel-codec2@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > > --------------------------------------------------- > Alan VK2ZIW > Before the Big Bang, God, Sela. > OpenWebMail 2.53, nothing in the cloud. > > > > _______________________________________________ > Freetel-codec2 mailing list > Freetel-codec2@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 -- Eric Jacksch, CPP, CISM, CISSP e...@jacksch.com Twitter: @EricJacksch https://SecurityShelf.com _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
