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

From: Rick Parrish
Subject: Re: [Discuss-gnuradio] DV Dongle - AMBE USB Device
Date: Thu, 20 Mar 2008 01:16:48 -0500
User-agent: Thunderbird (Windows/20060909)

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.

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