Hi, I'm also working on some TDMA code (SDR based). There are a few issues. Codec2 frames are 40 ms which are a bit too long to fit into the slots (with guard times involved). Because code schedules radio bursts in the future and updates the scheduler clock every X frames, long delays are to be avoided. Any chance we could get 10 ms frames from Codec2? The GSM codec does 10 ms frames which is what I'm currently using.
Cheers, Adrian On 11/3/17, David Rowe <da...@rowetel.com> wrote: > Yes it's a good idea and quite possible. Brady O Brien KC9TPA has > recently been prototyping some code for a TDMA mode. > > - David > > On 03/11/17 02:13, Paul Sperbeck wrote: >> I was watching Bruce Perens on the DDC youtube from HRN. >> >> see: >> >> https://www.youtube.com/watch?v=giZi4Y7FlwM >> >> He mentioned a 'fusion' (not the yaesu kind) of digital voice and TDMA >> that could be used to create single frequency repeaters. Having built a >> set of cans years ago this looks like quite an advancement. >> >> I don't know how much overhead TDMA requires, but is this something >> that could be melded with codec2? I would hate to see the 'big three' >> get their chops in first... I don't think the ham community needs >> another Dstar-Fusion-DMA street fight. >> >> I don't have any coding skills, I'm mostly a gear head and hardware >> guy, so I'm asking here if this is feasible or compatible with codec2? >> or even if it's a good idea? >> >> >> -- >> 73 >> de >> paul >> WB9HCO >> >> "You see, wireless telegraph is a kind of a very, very long >> cat. You pull his tail in New York and his head is >> meowing in Los Angeles. Do you understand this? >> And radio operates exactly the same way: you send >> signals here, they receive them there. The only >> difference is that there is no cat." Albert Einstein >> >> Resistance Is Not Futile! >> It's voltage divided by current. >> >> No trees were killed in the generation of this message, >> but a tremendous number of electrons were terribly >> inconvenienced >> >> "To err is human...to really mess things up requires the >> root password." >> >> >> >> ------------------------------------------------------------------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> >> >> >> _______________________________________________ >> Freetel-codec2 mailing list >> Freetel-codec2@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >> > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Freetel-codec2 mailing list > Freetel-codec2@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
