On increasing structural complexity of finite state speech models
Saeed V. Vaseghi, P. N. Conner · 1992
Some methods of modeling speech spectral features and duration within the framework of finite-state models are discussed. On observation modeling, the use of cepstral-time matrices, instead of cepstral vectors, as the observation unit is investigated. On duration modeling, a new HMM is introduced in which state transition and duration probabilities are combined to form duration-dependent transition probabilities. The duration dependent transitions are derived from the cumulative density function (CDF) of state duration.>