Tuesday, February 22, 2011

[HMM] The GCONST in HTK's HMM definition file

The GCONST value is a precomputed constant for the log likelihood of the Gaussian, i.e. the log of the denominator of the Gaussian formula:

The stored GCONST is:

where for the diagonal covariance matrix, the determinant is just the product of the diagonal elements.

Posted via email from Troy's posterous

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