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Published 20 hours ago • verified publisher icon szechyjs

NXDN metadata

Open TheRealMoeder opened this issue 10 years ago • 8 comments

Do you think it would be possible to include displaying NXDN metadata (especially User ID)?

TheRealMoeder avatar Sep 04 '14 12:09 TheRealMoeder

Would like this for DMR as well. Seeing more of it on the ham bands and would like to be able to do the talkgroup and source IDs as in P25.

nivex avatar Sep 18 '14 00:09 nivex

Does anyone have sample NXDN and DMR sample files they can contribute?

szechyjs avatar Sep 18 '14 03:09 szechyjs

http://www.nivex.net/images/tmp/gqrx-20140918-211010.flac DMR conversation on time slot 2, talkgroup 2, between IDs 3137159 and 3137136.

nivex avatar Sep 18 '14 21:09 nivex

Actually LinuxSheeple-E (Eric Cottrell) has made quite some progress in decoding DMR and NXDN data. It's not yet released in his DSD github sources, but a compiled Windows version has been (pre-)released for testing purposes. Maybe you should talk to him first, also about reuniting the source branches, before you put too much effort into it.

TheRealMoeder avatar Sep 19 '14 11:09 TheRealMoeder

I also came across this on RadioReference: https://github.com/IanWraith/DMRDecode Looks like he started with this codebase and went about decoding the other bits.

nivex avatar Sep 19 '14 20:09 nivex

Yea, I've taken a few notes from this. One unfortunate part about DMR is that the source and destination IDs are not contained in a single frame. This information is split up over about 3 frames. Some extra work will be required to show this information as its not readily available in the information we already have.

szechyjs avatar Sep 21 '14 21:09 szechyjs

Hi. I can contribute with some RF IQ recordings of NXDN and DMR radios. Any preference on the format?

EdFuentetaja avatar Sep 22 '14 09:09 EdFuentetaja

@EdFuentetaja Audio: flac, 48000 Hz, mono, s16

szechyjs avatar Sep 26 '14 01:09 szechyjs