Efficient convex optimization for real-time robust beamforming with microphone arrays

摘要

Disclosed herein, among other things, are methods and apparatus for improving speech intelligibility for speech-in-noise in audio processing and hearing assistance devices. The present subject matter includes a method for improving speech intelligibility for speech-in-noise for audio processing and hearing assistance devices. The method includes receiving an audio signal using a microphone array and processing the received signal to improve speech intelligibility in noise. A barrier-type beamforming process is used to improve signal-to-noise ratio at the output of the microphone array. The beamforming process includes convex optimization using a logarithmic barrier function, according to various embodiments.

主权项

1. A method, comprising:
receiving an audio signal using a microphone array in a hearing assistance device; and processing the received signal to improve speech intelligibility in noise, including using a barrier-type beamforming process to improve signal-to-noise ratio at the output of the microphone array function and using a level of steering vector mismatch to adapt computational complexity, wherein the beamforming process includes convex optimization using a logarithmic barrier, and wherein the beamforming process is adapted to execute on a processor of the hearing assistance device by eliminating a linear constraint, truncating a conjugate gradient method, or eliminating a Cholesky factorization.