[Speex-dev] Speex FLOP requirements

Jean-Marc Valin Jean-Marc.Valin at USherbrooke.ca
Wed Jun 8 13:34:23 PDT 2005

Hi Dave,

If you're concerned with power consumption, then I would definitely
recommend using a CPU/DSP with no FPU and use the Speex fixed-point
port. The exact requirement depend on what sampling rate and bit-rate
you want to use. If you tell me what mode of operation you're targeting,
then I can give you a better idea of what would do the job.

As for the FLOP/MIPS rating, I wouldn't take those too seriously as
there are so many ways to count and in practice, there are very few
applications that achieve the values in these benchmarks. 


Le mercredi 08 juin 2005 à 17:14 -0300, Dave Bardsley a écrit :
> Jean-Marc,
> I'm an embedded systems designer and am in the process of selecting a
> hardware
> platform to run a Linux-Speex VoIP application.  Being concerned with size
> and
> power consumption I must choose a processor with a minimal amount of
> computational power.  To that end I've narrowed my search to number of
> different products that reference the popular "SiSoft Sandra(TM)" wetstone
> bench-mark test for floating point performance.
> Given that hardware manufacturers shamelessly choose the most favorable
> test conditions to maximize their product's apparent performance, for
> example
> operands may be stored and fetched solely from cache, do the Speex FLOP
> requirements given in the table four of the manual correlate well to a
> stated hardware manufacturer's FLOP performance?  By comparison, would you
> share the wet/drystone performance figures for any of the test and
> development
> systems used during Speex development and test?
> Sincerely,
> Dave
> David Bardsley
> Electrical Engineer
> Product Development
> Pantel International Inc.
> Tel: 902 468 5998 x210
> Fax: 902 468 6577
> Web: www.InterTalk.ca
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Jean-Marc Valin <Jean-Marc.Valin at USherbrooke.ca>
Universite de Sherbrooke

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