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[aprssig] Re: D-STAR video on YouTube

Scott Miller scott at opentrac.org
Tue Sep 25 04:19:55 UTC 2007

Are you saying D-Star is going to be APCO 25 compatible?  I haven't 
heard that.  It'd take a lot more than using the same codec to let them 


Mark Fellhauer wrote:
> At 07:41 PM 9/24/2007, Patrick Green wrote:
>> I wonder if D-Star would die if someone came up with a completely open 
>> version of digital radio.  I see all this interest in SDR and D-Star's 
>> licensing would make it inconvenient to make a software based radio.  
>> Will this be the ultimate downfall?  Who here wants to buy a packet 
>> TNC when your soundcard can basically do the same thing?  Just a thought.
>> 73 de Pat --- KA9SCF.
> Probably not.   As pointed out D-Star uses DVSI's AMBE codec.  AMBE is 
> slated to replace the IMBE codec in Phase 2 of APCO 25.  That is not a 
> coincidence or accident on the part of the JARL or Icom.  I'm sure they 
> looked at open source.
> One, it puts us as ham radio operators into state-of-the-art in 
> communications for the first time in about 10 years.   It's so nice to 
> say that.   Are we Icom's lab rat for their rollout of commercial P-25 
> Phase-2 products?  Yup.
> Two, it gives us a common platform with professional public safety 
> personnal.  When they catch up.  Actually I think AMBE is backwards 
> compatible capable with IMBE.
> But yes, it would be great if someone came up with a open source codec 
> that supplants AMBE.  Which is, btw, starting to show its age.
> Mark
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