摘要: A flexible vocabulary speech recognition system is provided for recognizing transmitted via the public switched telephone network. The (FVR) a phoneme based system. phonemes are modelled as hidden Markov models. represented concatenated models trained using Viterbi training enhanced by: substituting covariance matrix of given by others, applying energy level thresholds and voiced, unvoiced, silence labelling constraints during training. Specific members, such digits, allophone A* searching lexical network facilitated providing reduced which provides estimate scores used to evaluate path through Joint rejection out-of-vocabulary words both cepstrum LSP parameter vectors.
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