Noise Cancelling Headset Using SigmaStudio (3.14)

peyschbas Question

Mar 12, 2017 00:00

Dear engineers,

I am in the planning phase of a noise cancelling headset that has one (1) speech mic (mouth level), one (1) ambient mic (ear level),

two (2) other left and right mics for noise cancellation, and two (2) left and right speakers. I am looking at chipsets that have a combined CODEC+DSP functionality such as the latest ADAU1777. My questions are:

1. SigmaStudio supports ADAU1772 but, not the latest ADAU1777; when is the support for ADAU1777 planned to happen in SigmaStudio?
2. I noticed that SigmaStudio has a lot more functionalities for ADAU1691, ADAU1701, and ADAU1702 but, a lot less for ADAU1772 (and probably ADAU1777 when supported); what is the recommended chipset that has the functionalities to support my application, i.e. noise cancelling headset with four (4) mics and two (2) speakers?
3. Given your recommended chipset in point 2. above, what noise cancelling functionalities should I use in SigmaStudio? I failed to find the basic ones such as:
a) ambient noise removal (spectral or other) given two (2) mic inputs, i.e. one (1) speech mic and one (1) ambient mic;
b) noise cancellation algorithm given two (2) or four (4) mic inputs.

Thanks much for your support.

Peman

Audio Signal Processors

adau1702

adau1772

noise cancelling

Integrated/Special Purpose A/D Converters

sigmastudio

SigmaDSP Audio Processors

headset

adau1777

Audio CODECs

adau1701

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ADIApproved Reply

Mar 14, 2017 00:00

Hi Peman,

The ADAU1772 and ADAU1777 are our parts that are optimized for noise cancelling headset applications, so you're on the right track. It sounds from your requirements like either part would easily satisfy your needs. To answer your questions:

SigmaStudio support for the ADAU1777 is in its final stages of testing, and will likely be included in the next release.

In order to reduce their latency to a level acceptable for noise cancellation, the ADAU1772/1777 were designed with a somewhat minimal DSP. It still contains all the necessary functions to do noise reduction, but not much beyond that. Our other audio DSPs do have a more full-featured core, but do not achieve a low enough latency.

As of now, there is no one-size-fits-all block containing a noise removal algorithm. However, most noise reduction applications use IIR filters as their building blocks, which is what the ADAU1772/1777 do. For a little more reading, check out this thread: ADAU1772 - Active Noise Reduction?

Best Regards,

Tyler

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peyschbas Reply

Mar 15, 2017 00:00

Thank you for your prompt response, Tyler. This is great!

Cheers,

Peman Montazemi

On Mar 14, 2017 1:03 PM, "TylerK" <analog@analog-vm.hosted.jivesoftware.com>

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