XCore-200 beamforming library

[shaileshwankhede]

Hello,

we have purchased xcore-200 based mic array and now intend to use it for beam-forming for our telepresence product. I can read that xCORE-VOICE Smart Microphone already has the implementation for beam-forming and other similar stuff. But this part I couldn't see available for purchase on digikey or other supplier. Can XMOS provide beam-forming library for xcore-200 processor or technical support to achieve the same.

Thanks,
Shailesh

[johned]

Hi Shailesh,

Have you checked out the app notes on the mic array board page :
https://www.xmos.com/support/boards?product=20258

Best regards,
John

[shaileshwankhede]

Hi John,

Thanks for suggestion. I have gone through application notes. AN00218: High Resolution Delay and Sum is of some interest. But fresh downloaded source is giving lot of compilation errors. I am using xTimecomposer Version: Community_14.2.3. For first time it imported some of the required libraries but was giving error about version of libAssert. I replaced existing libAssert(v2.1) with newer 3.0 version but now project is giving lot of errors.
I have attached errors text file.

Thanks,
Shailesh

[johned]

Please can you check that the tools have imported all of the required modules (libraries).
This should happen by default but it is worth checking.
John

[shaileshwankhede]

Update:

Checked older version 1.0.1 of application. It is compiling without errors.
All required modules should have been imported properly. But still I will check now for versions of modules imported and difference in Application new version 1.0.2 and version 1.0.1.

Thanks,
Shailesh

[johned]

Thanks Shailesh, I will look into it.
Best regards,
John

[shaileshwankhede]

Hi John,

Now compilation problem for newer app version 1.0.2 is fixed. To fix I replaced lib_mic_array_board_support and lib_mic_array with updated libraries fetched from
https://github.com/xmos/lib_mic_array_board_support &
https://github.com/xmos/lib_mic_array

Thanks,
Shailesh

[johned]

Hi Shailesh,
Thank you very much for letting me know.
It looks like a library synchronization problem in our releases.
I will inform Engineering.
All the best,
John

[shaileshwankhede]

Hi,

I looked into beamforming code and app note. It is built onto very basic conventional delay sum approach. It is not robust, I can here other voices though not in beam directions. Need to look for more robust algorithm. Let me know if you have any other beamforming implementations.

Thanks,
Shailesh

[shaileshwankhede]

One more question, does xCORE-VOICE Smart Microphone uses same delay and sum algorithm for beamforming or it is using more advanced one?

Thanks,
Shailesh