[Speex-dev] How many RAM Speex need??
B. Mitchell Loebel
multinode at earthlink.net
Thu Mar 27 20:10:52 PDT 2008
By way of comparison, I run an implementation of the G.729 decoder on
T.I.'s TMS320vc5402. It takes about 15K bytes of ram. That includes
code and tables.
At 11:44 AM 3/27/2008 -0400, Jim Crichton wrote:
>I use Speex on a C5509A DSP, which has 256k bytes of RAM for code and data.
>Speex fits very comfortably in less than half of this memory. However, I do
>not have room for the echo canceller code in my overall application. In
>your case, with the large Flash, the code space should not be a problem.
>However, I believe that you will need wait states to run from Flash, so
>performance could be an issue.
>You should be able to move a few critical routines into internal RAM and run
>everything else from Flash, and run all that you need on this platform. It
>will take some experimentation, though, to work out what needs to be moved
>to faster memory. Hopefully, you can sort that out in the TI simulator.
>----- Original Message -----
>From: "Alain M." <alainm at pobox.com>
>To: "Speex List" <speex-dev at xiph.org>
>Sent: Thursday, March 27, 2008 11:10 AM
>Subject: Re: [Speex-dev] How many RAM Speex need??
> > Jean-Marc Valin escreveu:
> >>> My name is Vasily.
> >>> I am a software developer from Ukrane, and i am going to use Speex on
> >>> TMS320F28335 DSP-controller wich has only 68KB of RAM.
> >> Assuming you've got ROM to hold the code/constants and that RAM is only
> >> used for variables, then 68 kB should probably be enough.
> > I am concerned if the TMS320F28335 as a whole can handle speex:
> > 16 bits, 150MHz, dual MAC, floating point
> > 512kbytes Flash, 68kbytes RAM, with DMA
> > Digikey $26/100 to $30/1, not available, Mouser same$, available
> > Or even the TMS320F28235:
> > almost the same, no floating point, $3 less
> > Tools $500, starter kit not available
> > It is a very interesting *all-in-one solution*...
> > thanks for any comment,
> > Alain
> > _______________________________________________
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> > Speex-dev at xiph.org
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B. Mitchell Loebel, CEO, VP Engineering 408
InstaFlash International Corporation
(formerly Minute-Tape International Corporation)
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