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[aprssig] OT: Yaesu to release digital amateur radio gear

Derek Love DLove at app-tech.co.uk
Mon Jan 9 08:51:25 UTC 2012

I bought 5 AMBE-3000 chips at the end of last year at $30 a piece. The 2020
doesn't handle the DMR format.

Royalties are paid if you use their code in your radio, not if you buy their
chip (that would be like paying twice!), but $30 is expensive enough!

Derek, G7ORK

-----Original Message-----
From: Tom Azlin N4ZPT [mailto:tom at n4zpt.org] 
Sent: 06 January 2012 23:30
To: aprssig at tapr.org
Subject: Re: [aprssig] OT: Yaesu to release digital amateur radio gear

Make that IMBE for first generation P25. Still a DVSI product.

Royalties - seems like a bunch of urban myths here. The DVSI site says no
royalties or licensing fees for buying their vocoders chips and putting them
in radios. see http://www.dvsinc.com/products/a2020.htm for an example.  I
did not have to pay any royalty to buy the AMBE vocoder chips. something
like $8 for surface mount and $18 for DIP in volume. I got mine for $23

Might be royalties to build to APCO Project 25, DMR, etc. standards. But no
royalties to build to the JARL standard or use an AMBE vocoder seems to me.

73, tom n4zpt

On 1/6/2012 2:05 PM, Stephen H. Smith wrote:
> However, the "secret sauce" AMBE (Advanced Multi-Band Excitation) 
> codec used for voice coding/decoding (that compresses analog voice to 
> a 4.8 or
> 2.4 kilobits/sec data stream in P25 systems) is NOT! It is the 
> proprietary intellectual property of DVSI (Digital Voice Systems Inc) 
> who collects a royalty of anywhere from $20 to $100 PER RADIO.

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