Audio beamforming

Delivering an optimal voice recognition solution for satisfactory user experience

Infineon Technologies AG and XMOS partner to deliver a new building block for voice recognition. It features a combination of radar and silicon microphone sensors from Infineon and audio processor from XMOS. The devices provide far field voice capture by audio beamforming combined with radar target presence detection. Together, they guarantee for optimal sound recognition and flawless execution for digital voice assistance across a broad range of voice-controlled devices. Target applications are especially smart home/voice assistants as well as  smart TV and set top box, secure keyless entry systems, and other voice-operated consumer devices.

The 70dB SNR microphones are based on the dual backplate MEMS technology from Infineon and are well suited for far field voice capturing and beamforming. In addition, improving the SNR of the microphone will further enhance the performance.

The XMOS audio processor processes the signal data from an array of Infineon PDM microphones, adjusting the angular and distance data from each microphone to produce a beam at an angle identified by the radar data. A lit LED indicates presence detection and where sound is taken from.

The combination of Infineon radar and XMOS beamformer allows the microphone to target a specific target source precisely, even as the target moves around a room of people talking and inanimate sounds. The microphone delivers a superior user experience to existing voice-controlled systems, with clear understanding of commands and flawless execution that prevents unwanted activations of devices.

Infineon and XMOS products for audio beaming

  • Infineon's BGT60TR24B - 60GHz 2Tx/4Rx radar IC with accompanying antenna
  • 70dB SNR microphones based on Infineon’s unique dual backplate MEMS technology
  • XMOS’ audio processor