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Re: GB3IN screwed up by DSTAR Shite

On Thu, 24 Sep 2009, Brian Morrison wrote:

> Steve wrote:
> >
> > On Thu, 24 Sep 2009, Stuart wrote:
> >
> >> I see the GB3IN group are now messing around with DSTAR on the repeater.
> >> What a pity.  Another great repeater in the midlands bites the dust.
> >
> > Silly question. What do I need to access a dstar repeater? Is there some
> > homebrew, opensource type solution?
>
> Not as such, and you've always got to use the AMBE codec to be compatible.
>
> An open source codec development is just beginning, but even then it
> won't be interoperable as the AMBE codec patents prevent
> reimplementation even for non-commercial use and there is no published spec.

OK. Thanks for the info. I googled AMBE and came up with this -
http://codec2.org . So it looks like there is might be an alternative but
it's no good unless they completely reverse engineer the codec (which I
guess isn't allowed?) or existing users make changes to support a new
codec (unlikely?).

Sorry state of affairs really. It's a pity ICOM didn't make extra effort
in their codec choice, but then it has given them an edge in the market.

Steve.

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