Improving Amazon Alexa Voice Service: Stereo-AEC far-field linear dev kit

02 March 2018

From XMOS: stereo-AEC far-field linear development kit for improved Amazon Alexa Voice Service (AVS)
From XMOS: stereo-AEC far-field linear development kit for improved Amazon Alexa Voice Service (AVS)

From EchoXMOS this development kit presents the first linear mic array solution qualified by Amazon for far-field performance that supports stereo acoustic echo (not Echo!) cancellation.

It was in October 2017 that XMOS launched its mono VocalFusion 4-Mic Dev Kit, also qualified by Amazon for AVS. Both kits integrate Infineon's high signal-to-noise ratio (SNR) XENSIV= MEMS microphone IM69D130 – to ensure the highest performance and reliability.

Now, following this announcement, XMOS now has more far-field qualified Amazon AVS Dev Kits than any other vendor.

"Our strategic partnership with Infineon, and the use of their high-performance microphones helps us to deliver outstanding far-field performance," said Mark Lippett, president and CEO of XMOS. "The combination of the XENSIV MEMS microphones and the XVF3500 voice processor delivers a class-leading user experience."

Infineon's high performance digital XENSIV MEMS microphone IM69D130 provides premium audio raw data – perfect to combine with XMOS's advanced audio signal processing algorithms, enabling it to handle even the most demanding scenarios.

Using XENSIV MEMS microphones, far-field and whispered voice pick-up performance can be achieved with a signal-to-noise ratio of 69 dB, and exceptionally low distortion of less than 1% – up to 128 dB sound pressure level.

The VocalFusion stereo development kit features a VocalFusion XVF3500 voice processor, which supports full duplex stereo-AEC (Acoustic Echo Cancellation). It is designed for developers working on Alexa-enabled stereo electronics, including smart TVs, soundbars, set-top boxes, digital media adapters, audio and visual equipment.

For more information, visit this link from XMOS, and for more details about the Infineon XENSIV MEMS microphones, click

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