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Re: [Discuss-gnuradio] Over the Air Signal Capture

From: mgray
Subject: Re: [Discuss-gnuradio] Over the Air Signal Capture
Date: Sat, 15 Jan 2005 11:04:10 -0700 (MST)

I will take a look at that.  I agree, I wish they would look at more open 
standards.  But the old school hardware guys want to sell hardware and 
don't care about open source or the open spirt of ham radio.  In the 
early days of radio, ham radio was very leading edge.  I think it still 
is, but to a lesser extent.

The other reason I asked about an open source version of IMBE was to 
receive public service APCO 25 radio.  APCO 25 is an open standard, but 
I'm not sure about the IMBE CODEC.  It would be nice to receive the 
digital radio that is going into every city now.

On Sat, 15 Jan 2005, Ramakrishnan Muthukrishnan wrote:

> On Fri, 14 Jan 2005 16:23:34 -0700 (MST), address@hidden
> <address@hidden> wrote:
> > What are the thoughts on an IMBE CODEC?  Isn't that covered by a patent?
> Use speex, if you want to encode speech with a patent unencumbered
> algorithm. Speex (AFAIK) use algorithms for which patents have expired
> or are old enough. I have listened to speex encoded speeches, they are
> excellent. IMHO, ham community should not embrace AMBE (as has been
> done in some of the digital voice projects).

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