Re: [Discuss-gnuradio] DV Dongle - AMBE USB Device

[Rick Parrish]

David I. Emery wrote:
> Is this a DVSI licensed and publically available closed source module 
> or something "unofficial" or not generally available to the world at 
> large ? It has obviously long been possible to recode some reverse 
> engineered DSP chip based IMBE implemenation into C++ source code for 
> Wintel/Unix/BSD use, but this would not be free of license and patent 
> issues... and could not be made part of an open sourced project or 
> product without a DVSI deal (and it appears they don't see this as in 
> their interest).
Reverse engineering - at least for two common IMBE variants (P25 and 
MA/COM's ProVoice) - isn't necessary. Both algorithms are published by 
DVSI through the TIA.

One of WinRadio's more recent offerings includes a software codec option 
for P25. It's a $99 download - probably DRM'd to your radio's serial number.