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Evaluate STM32 voice communication front end

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Wed, 10/07/2020
4:40am
psy16882001_6633
#1
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#1
Evaluate STM32 voice communication front end

Hello,

Currently, we are looking for voice communication front ends for our conference speaker. We select 4 microphones circular arrays geometry.

We survey ST part NO. STM32F427VG and STM32H750VB for our solution.  

The basic specifications are as below

STM32F427VG: ARM Cortex-M4, 180 MHz CPU, 1MB Flash, 256+4 KB RAM

STM32H750VB: ARM Cortex-M7, 480 MHz CPU, 128K Flash, 1MB RAM

Here I have some questions.

  1. Which one can implement 4 mics voice communication algorithm above ST component?
  2. Could you please recommend the others processor be able to satisfy 4 microphones voice communication algorithm?

Thank you!

Wed, 10/07/2020
7:20am
Chris Perry
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There is not a simple answer to your question, It depends on how much front end processing you need and the quality you expect. I can say that the STM32H750 with 128K of flash is too small. I would recommend the STM32H753 with 2MB of flash.

Wed, 10/07/2020
10:43am
psy16882001_6633
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(Reply to #2)

Hi Chris,

Thank you for your answer. 

The supplier recommends the STM32H750 platform code(for example DSP boot code, DSPC lib) put in external Flash because of cost considerations.

So what do you think of the microphone algorithm performance?

Thank you!