[Speex-dev] Porting Speex to embedded 32bit

[Jean-Marc Valin]

Hi Vitaliy,

Thanks very much for these performance measures. That'll be something I
can point people to when they ask about Speex on ARM.

Cheers,

	Jean-Marc

Vit Kanevsky a écrit :
>  
> 
>>Dear Speex developers
> 
>>I am going to port Speex on LPC2368
>>I tested Speex encoding and the mesurments shows ~40ms cpu time for one
>>frame
> 
>>Do you know who ported speex to NXP or other 32bit platform?
> 
>>Best Regards
>>Zohar fox
> 
> I have an own optimisation for Speex for different versions of ARM
> architecture.
> 
>  
> 
> Here is Measurements of performance for STM32 72 MHz.
> 
>  
> 
> 4000 kbit/sec
> 
> Encoder - 59%
> 
> Decoder - 3%
> 
>  
> 
> 6000 kbit/sec
> 
> Encoder - 43%
> 
> Decoder – 3.8%
> 
>  
> 
> *8000 kbit/sec*
> 
> *Encoder - 47% *
> 
> *Decoder - 4%*
> 
> **
> 
>  
> 
> 11200 kbit/sec
> 
> Encoder - 65%
> 
> Decoder – 4.1%
> 
>  
> 
> 15000 kbit/sec
> 
> Encoder - 53%
> 
> Decoder – 4.2%
> 
>  
> 
> Except 11200 mode it can work on 48 MHz STM32 USB Access Line. (11200
> probably can work in non full duplex application).
> 
>  
> 
> Version for ARM v5E (STR9) is faster for about of  25% for comparable
> processor’s frequencies, by using of DSP commands.
> 
>  
> 
> Version for ARM v4 (STR7, LPC21XX/23XX/28XX) can work even on 60 MHz.
> (but not all speex modes. Just 6,8,15).
> 
>  
> 
> Here is Measurements of performance for LPC2138 - 60 MHz.
> 
>  
> 
> 4000 kbit/sec    (quality = 1)
> 
> Encoder - 17.9 msec/frame  59%
> 
> Decoder - 0.97 msec/frame  3%
> 
>  
> 
> 6000 kbit/sec  (quality = 2)
> 
> Encoder - 13.5 msec/frame  43%
> 
> Decoder – 1.11 msec/frame 3.8%
> 
>  
> 
> 8000 kbit/sec  (quality = 3)
> 
> Encoder - 15.07 msec/frame 47%
> 
> Decoder - 1.14 msec/frame 4%
> 
>  
> 
> 11200 kbit/sec  (quality = 5)
> 
> Encoder -  21 msec/frame 65%
> 
> Decoder – 1.19 msec/frame 4.1%
> 
>  
> 
> 15000 kbit/sec (quality = 7)
> 
> Encoder - 16.71 msec/frame 53%
> 
> Decoder – 1.24 msec/frame 4.2%
> 
>  
> 
> on LPC2368 - 72 MHz NXP All modes work ( in case of using DMA for
> collect 160 input samples)
> 
>  
> 
> Best Regards
> Vitaliy Kanevsky
> 
> 
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