ADAU1761 noise removal algorithm

Mack Question

Oct 8, 2012 00:00

Hello,

I has applied nosie reduction which is ADI's own algorithm on ADAU1761 for my application. From experiments, I verified that that algorithm is effetive in reduction of noise under 100Hz. However I want to extend cut off frequency to 1kHz. I wonder there is any way to reduce noise under 1kHz using noise reduction alogorithm block. Or any other way?

Best Regards,

Mack.

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ADIApproved Reply

Oct 8, 2012 00:00

Hi Mack,

Which algorithm are you referring to specifically? Could you provide a screenshot or a more specific description of where this algorithm is located in the toolbox?

Thanks,

Brett

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Mack Reply

Oct 9, 2012 00:00

Below is the screen shot.

I used SigmaStuido Ver. 3.7 Build 7.

Best Regards,

Mack.

81bb289260f75b81edd3a65e6a64f5c8.png-450x276.png

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ADIApproved Reply

Oct 9, 2012 00:00

Hi Mack,

You can find the documentation here:

http://wiki.analog.com/resources/tools-software/sigmastudio/toolbox/adialgorithms/noisereduction

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rmsnyder Reply

Nov 13, 2012 00:00

Brett,

I also have an application where I am strictly concerned about low quality voice (we are happy with 2.5 to 3kHz bandwidth). Currently I have my system running at 48kHz, but would like to back down to 16kHz so I can play with the noise removal algorithm as mentioned above. When I select 16kHz (ADAU1761) everything seems to fall apart. I do have some DC blocks in my system (driving a VCO) and I have adjusted them to 16kHz with no luck. I have also played with some of the hardware configuration stuff, but I don't want to head too far down that road until I know what I'm doing.

I did 'set system sampling rate' to 16kHz as well, but I've not had any luck. Also I adjusted my DC block to compensate for the change in sampling rate.

Best regards,

Bob

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