Patent Document ID: 20160133272
Application ID: 14938816
Patent Status: 0

Claim One:
1. A method for transforming an audio signal comprising: obtaining a primary channel of an audio signal with a primary microphone of an audio device; obtaining a reference channel of the audio signal with a reference microphone of the audio device; estimating a spectral magnitude of the primary channel of the audio signal for a plurality of frequency bins; estimating a spectral magnitude of the reference channel of the audio signal for a plurality of frequency bins; transforming one or more of the spectral magnitudes for one or more frequency bins by applying at least one of a fractional linear transformation and a higher order rational functional transformation; and transforming one or more of the spectral magnitudes for one or more frequency bins by one or more of: renormalizing one or more of the spectral magnitudes; exponentiating one or more of the spectral magnitudes; temporal smoothing of one or more of the spectral magnitudes; frequency smoothing of one or more of the spectral magnitudes; VAD-based smoothing of one or more of the spectral magnitudes; psychoacoustic smoothing of one or more of the spectral magnitudes; combining an estimate of a phase difference with one or more of the transformed spectral magnitudes; and combining a VAD-estimate with one or more of the transformed spectral magnitudes.