Dave,
I think the value of a "reasonably portable" fixed-point implementation is
to avoid the need for a specialized DSP chip on reasonably fast hardware
sans floating point. Certainly a DSP (or FPGA) implementation makes a nice
daughter card / add-on for a general purpose processor board (like the
Raspberry Pi) but a fixed-point implementation has wider reach and in my
opinion should be prioritized.
------------------------------
John D. Hays
K7VE
PO Box 1223, Edmonds, WA 98020-1223
<http://k7ve.org/blog> <http://twitter.com/#!/john_hays>
<http://www.facebook.com/john.d.hays>
>
> On 12/14/2012 10:11 PM, David Witten wrote:
> > Scott, Kristoff, David,
> >
> > I certainly don't want to dissuade anyone from doing a fixed-point
> > implementation of the codec.
> >
> > But I feel that I should point out that floating point DSP's are a lot
> > commoner and cheaper than they once were. For example the TI OMAP
> > and perhaps Sitara lines provide programmable floating point DSP
> > cores. They also provide free (if not Open Source) but time-limited
> > tools for this purpose. This includes the chips on the BeagleBoard
> > and Panda board, among others. But not the Beaglebone. Other
> > companies have competitive offerings.
> >
> > Still, a reasonably portable fixed-point implementation would be much
> > more valuable in general.
> >
> > Dave Witten, KD0EAG
> >
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