Timeline for DMR / DSTAR / P25 Software Encode / Decode
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Apr 9, 2019 at 17:53 | comment | added | Skyler 440 | MD380EMU and OP25, both available on GITHUB now accomplish this task or encode & decode ! | |
| Sep 20, 2016 at 12:12 | comment | added | Phil Frost - W8II | I'm pretty sure the link above describes a GMSK modem sending Codec 2 encoded voice, though he does say running it through an FM radio didn't perform very well. The D-STAR modem isn't patented and has open-source implementations, and also a data-only mode. You could theoretically run Codec 2 over D-STAR, though I'd guess D-STAR's data rate is well in excess of what's required by Codec 2. | |
| Sep 19, 2016 at 22:49 | history | edited | Skyler 440 | CC BY-SA 3.0 |
added 288 characters in body
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| Sep 19, 2016 at 22:46 | comment | added | Skyler 440 | Codec2 uses FSK. This MAY work over VHF, but the problem is you have to modulate over SSB or it will underperform FM if you try to send it over FM modulation. GMSK modems, however, tend to perform well over FM modulation, and DSTAR users can build a node with a DVboard and an FM transceiver discriminator/flat audio. I would really love to see something like codec2 which uses GMSK. | |
| Sep 19, 2016 at 20:51 | comment | added | Phil Frost - W8II | Some experiments have been done with codec2 on VHF. I've never tried it personally though, nor have I heard of anyone who has. The amateur radio hobby seems to be divided between people who get on the air a lot with whatever equipment the manufacturers give them, and experimenters that build new radios and technology but rarely get on the air. So I'm not sure anything will ever come of it :-) | |
| Sep 19, 2016 at 12:38 | answer | added | Jon Kåre Hellan LA4RT | timeline score: 7 | |
| Sep 19, 2016 at 2:56 | history | asked | Skyler 440 | CC BY-SA 3.0 |