How does the leaky HMM coefficient interact with L2 regularization in Kaldi chain model training?
Goal Determine whether the leaky HMM coefficient and L2 regularization term in Kaldi's LF-MMI chain training should be jointly tuned or can be set independently based on a principled criterion. Constraints Kaldi's chain models use lattice-free MMI with a denominator graph constructed from training data. The leaky HMM coefficient adds smoothing probability to
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