Large Vocabulary Continuous Speech Recognition - Berlin Chen
Large Vocabulary Continuous Speech Recognition - Berlin Chen
Large Vocabulary Continuous Speech Recognition - Berlin Chen
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WC: Implementation Issues (1/3)• Path hypotheses at each time frame are differentiatedbased on– The n-1 word history (for the n-gram LM)– The phone unit (or the tree arc)– The HMM state• Organization of active path hypotheses (states)– Hierarchical organizationActive HMM StatesActive ArcsNo. of States (NS)“A Data-driven Approach”Node( history, arc, state)Active Trees(LM Histories)No. of Trees (NT)No. of Arcs (NA)active HMM states(or path hypotheses)at frame t<strong>Speech</strong> – <strong>Berlin</strong> <strong>Chen</strong> 18
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