Method of noise estimation using incremental bayes learning

Details Method of noise estimation using incremental bayes learning Method of noise estimation using incremental bayes learning

G - Physics

10

L

G10L 21/02 (2006.01) H04B 15/00 (2006.01)

Patent

CA 2461083

A method and apparatus estimate additive noise in a noisy signal using incremental Bayes learning, where a time-varying noise prior distribution is assumed and hyperparameters (mean and variance) are updated recursively using an approximation for posterior computed at the preceding time step. The additive noise in time domain is represented in the log-spectrum or cepstrum domain before applying incremental Bayes learning. The results of both the mean and variance estimates for the noise for each of separate frames are used to perform speech feature enhancement in the same log- spectrum or cepstrum domain.

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