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Speaker-dependent Multipitch Tracking Using Deep Neural Networks

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Technical Report

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Ohio State University Columbus United States

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Multipitch tracking is important for speech and signal processing. However, it is challenging to design an algorithm that achieves accurate pitch estimation and correct speaker assignment at the same time. In this paper, we use deep neural networks DNNs to model the probabilistic pitch states of two simultaneous speakers. To capture speaker-dependent information, we propose two types of DNN with different training strategies. Thefirst is trained for each speaker enrolled in the system speaker-dependent DNN, and the second is trained for each speaker pair speaker-pair-dependent DNN. Several extensions, including gender-pair-dependent DNNs, speaker adaptation of gender-pair-dependent DNNs and multi-ratio training, are introduced later to relax constraints. A factorial hidden Markov model FHMM then integrates pitch probabilities and generates the most likely pitch tracks with a junction tree algorithm. Experiments show that the proposed methods substantially outperform other speaker-independent and speaker-dependent multipitch trackers on two-speaker mixtures. With multi-ratio training, our methods achieve consistent performance at various energies ratios of the two speakers in a mixture.

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