A variational EM algorithm for learning eigenvoice parameters in mixed signals
Ron J. Weiss; Daniel P. W. Ellis
- A variational EM algorithm for learning eigenvoice parameters in mixed signals
Weiss, Ron J.
Ellis, Daniel P. W.
- Electrical Engineering
- Permanent URL:
- Book/Journal Title:
- 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing: Proceedings: April 19-24, 2009, Taipei International Convention Center, Taipei, Taiwan
- Publisher Location:
- Piscataway, N.J.
- We derive an efficient learning algorithm for model-based source separation for use on single channel speech mixtures where the precise source characteristics are not known a priori. The sources are modeled using factor-analyzed hidden Markov models (HMM) where source specific characteristics are captured by an "eigenvoice" speaker subspace model. The proposed algorithm is able to learn adaptation parameters for two speech sources when only a mixture of signals is observed. We evaluate the algorithm on the 2006 speech separation challenge data set and show that it is significantly faster than our earlier system at a small cost in terms of performance.
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