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Message
From: Joachim Strombergson<Joachim.Strombergson@I...>
Date: Mon Feb 9 15:42:30 CET 2004
Subject: [oc] MP3 in uP and maybe not FPGA directly
Aloha!Quoting Richard Sloan <rsloan2003@h...>:
> I guess also the way to get MP3 out of a FPGA would be to implement a uP in
> the part and write decode software for the uP... anyone seen this done, neat
> idea....
Yes, several times. Altera used to demo this setup on their Nios-boards. The
Nios CPU handles the deframing and the LCD-display and control. Added to the
system is the needed iDCT-coprocessor that does the DSP-processing.
It's actually a good example of HW/SW-partitioning. Several solutions exists and
there is not one single solution that is best. You can do lots of area, power,
cost, flexibility trade-offs.
A counter solution for example is the dual StrongARM-solution (i.e. two MCUs
that together process the MP3 data and runs the GUI) that used to be found in
the iPod. Dunno if they have changed that in later iPods. To me that sounds like
an expensive and above all too power consuming solution. (Yes, I know StrongARM
have great MIPS/W-ratio, but using one too many of them would still result in
too much power).
--
Med vänlig hälsning, Yours
Joachim Strömbergson - Alltid i harmonisk svängning.
VP, Research & Development
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