A tree search strategy for large-vocabulary continuous speech recognition
Ponani S. Gopalakrishnan, L.R. Bahl, R. L. Mercer · 2002
We describe a tree search strategy, called the Envelope Search, which is a time-asynchronous search scheme that combines aspects of the A* heuristic search algorithm with those of the time-synchronous Viterbi search algorithm. This search technique is used in the large-vocabulary continuous speech recognition system developed at the IBM Research Center.