Speex dev - Aug 2006 - speex optimisation for ARM 5TE architecture

Hello everyone,
   
  Can any body please tell me the compiler options to optimise the speex code
for ARM TE architecture. Fixed point is enabled. It currently takes about 700ms
to encode 5 sec worth of voice. I need to get it down to under 10ms.
   
  Is the option --enable-arm5te-asm supported? I am using speex 1.1.12 version.
The configure.ac file does not seem to support --enable-arm5te-asm option. I
tried --enable-arm5e-asm but the result is'nt much different. Real time is
not possible at that rate. Processor is Xscale 533MHz.
   
  TIA
   
  nav

 		
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> Can any body please tell me the compiler options to optimise the
> speex code for ARM TE architecture. Fixed point is enabled. It
> currently takes about 700ms to encode 5 sec worth of voice. I need to
> get it down to under 10ms.
The ARM port has suffered a bit from the fact that I haven't been able
to keep the assembly up-to-date. Don't know what bit-rate/options you're
using so it's hard to say much about the absolute numbers. The only
thing I can say is that 10ms for 5 seconds of speech would mean using
only 0.2% of your 533 MHz chip, or about 1 MIPS. That's simply not
possible using any modern speech codec, so you'll have to either change
that requirement or deal with uncompressed (or very lightly compressed)
audio.
> Is the option --enable-arm5te-asm supported? I am using speex 1.1.12
> version. The configure.ac file does not seem to support
> --enable-arm5te-asm option. I tried --enable-arm5e-asm but the result
> is'nt much different. Real time is not possible at that rate.
> Processor is Xscale 533MHz.
--enable-arm5e-asm should be fine, but yes it needs improvements.
Basically, the only thing interesting (from the POV of Speex) in the
ARM5E arch is the DSP-like instructions that can do 16x16 multiplies in
a single cycle.

Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> wrote:  > Can any body
please tell me the compiler options to optimise the
> speex code for ARM TE architecture. Fixed point is enabled. It
> currently takes about 700ms to encode 5 sec worth of voice. I need to
> get it down to under 10ms.
The ARM port has suffered a bit from the fact that I haven't been able
to keep the assembly up-to-date. Don't know what bit-rate/options you're
using so it's hard to say much about the absolute numbers. The only
thing I can say is that 10ms for 5 seconds of speech would mean using
only 0.2% of your 533 MHz chip, or about 1 MIPS. That's simply not
possible using any modern speech codec, so you'll have to either change
that requirement or deal with uncompressed (or very lightly compressed)
audio.
> Is the option --enable-arm5te-asm supported? I am using speex 1.1.12
> version. The configure.ac file does not seem to support
> --enable-arm5te-asm option. I tried --enable-arm5e-asm but the result
> is'nt much different. Real time is not possible at that rate.
> Processor is Xscale 533MHz.
--enable-arm5e-asm should be fine, but yes it needs improvements.
Basically, the only thing interesting (from the POV of Speex) in the
ARM5E arch is the DSP-like instructions that can do 16x16 multiplies in
a single cycle.


 		
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