Cross Entropy Approximation of Structured Covariance Matrices
Cheng-Yuan LiouBruce R. MusicusPublished in: CoRR (2006)
Keyphrases
- covariance matrices
- cross entropy
- maximum likelihood
- covariance matrix
- log likelihood
- gaussian distribution
- parameter estimation
- gaussian mixture model
- vector space
- em algorithm
- distance measure
- hyperparameters
- language modeling
- closed form
- error function
- evaluation metrics
- expectation maximization
- ranking functions
- linear classifiers
- neural network
- document retrieval
- feature vectors