GSM AMR optimization

Hi,

I am optimizing GSM AMR reference code. The optimization needs not to
be bit-exact, in fact, some quality degradation is permitted. I have
done all the obvious things like primitives inlining, autocorrelation
approximation, etc. Are there any other mathematical shortcuts to make
the codec faster?

Right now, the codec is 25% slower that I need it to be.

TIA,
~Yaroslav

do you still work with GSM AMR
I have some experience about AMR optimizing
>Hi,
>
>I am optimizing GSM AMR reference code. The optimization needs not to
>be bit-exact, in fact, some quality degradation is permitted. I have
>done all the obvious things like primitives inlining, autocorrelation
>approximation, etc. Are there any other mathematical shortcuts to make
>the codec faster?
>
>Right now, the codec is 25% slower that I need it to be.
>
>TIA,
>~Yaroslav
>


		
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Hi,
what is your current speed ?, how powerful your DSP platform is (does it
support saturation, round, Q15,..., MAC instruction,...) how many
instruction can be grouped to be executed in one CPU Cycle ? I will have a
better solution for you based on that information.
Thinh Hoang.

>Hi,
>
>I am optimizing GSM AMR reference code. The optimization needs not to
>be bit-exact, in fact, some quality degradation is permitted. I have
>done all the obvious things like primitives inlining, autocorrelation
>approximation, etc. Are there any other mathematical shortcuts to make
>the codec faster?
>
>Right now, the codec is 25% slower that I need it to be.
>
>TIA,
>~Yaroslav
>


		
This message was sent using the Comp.DSP web interface on
www.DSPRelated.com