Thanks Jeroen, I'll take a look as advised. I had something similar in mind.
Adrian On 7 December 2017 14:51:23 EET, Jeroen Vreeken <jer...@vreeken.net> wrote: >Hi Adrian, > >On 12/07/2017 11:27 AM, Adrian Musceac wrote: >> On 12/7/17, Sebastien F4GRX <f4...@f4grx.net> wrote: >>> -replacement of DSTAR/DMR using codec2 and HAM CALLS as identifiers, >using a >>> decentralized user database that prevents ANY SINGLE INDIVIDUAL from >>> controlling/restricting user access >>> >> >> Hi Sebastien, >> >> I understand your concern about callsigns. Here is the commit which >> enables digipeating callsigns along with the Codec2 voice: >> >https://github.com/kantooon/qradiolink/commit/b72d0c97e26673bf4afd84d532b0190e4eca1f0d >> Note that at the moment, due to the very basic code structure, random >> noise frames will also get retranslated. Must implement some sort of >> flip-flop filter to prevent momentary noise burst decodes from being >> passed along. There is *much* work to be done yet. >You could also have a look at the data mode available for >2400A/2400B/800XA. >If no data is available a frame gets filled with just the address >(encoded callsign) is send including CRC. >The CRC is only 16bit so once in a while some noise will still be >decoded, but that can be filtered out much more easily. >For example: > - If it is a real transmission there will be more than one frame > - If we detect not just a dataframe, but also voice frames it is >also more likely to be true > - High SNR will also make it more likely to be valid. > >These can be combined relativly easy. Is it a lonely frame, with bad >SNR? Then it is probably just noise. > >Regards, >Jeroen > > >------------------------------------------------------------------------------ >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 -- Sent from my Android device with K-9 Mail. Please excuse my brevity. ------------------------------------------------------------------------------ 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
