[aprssig] OT: Yaesu to release digital amateur radio gear
Tom Azlin N4ZPT
tom at n4zpt.org
Fri Jan 6 17:29:37 CST 2012
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 each.
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
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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