Speech and Language Processing: An Introduction to Natural Language Processing, Computational Linguistics, and Speech RecognitionFor undergraduate or advanced undergraduate courses in Classical Natural Language Processing, Statistical Natural Language Processing, Speech Recognition, Computational Linguistics, and Human Language Processing.
An explosion of Web-based language techniques, merging of distinct fields, availability of phone-based dialogue systems, and much more make this an exciting time in speech and language processing. The first of its kind to thoroughly cover language technology - at all levels and with all modern technologies - this text takes an empirical approach to the subject, based on applying statistical and other machine-learning algorithms to large corporations. The authors cover areas that traditionally are taught in different courses, to describe a unified vision of speech and language processing. Emphasis is on practical applications and scientific evaluation. An accompanying Website contains teaching materials for instructors, with pointers to language processing resources on the Web. The Second Edition offers a significant amount of new and extended material.
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... Viterbi have to do only with how we fill each cell . Recall from Eq . 6.22 that the recursive step of the Viterbi equation computes the Viterbi value of time t for state j as N Vt ( j ) = max v1 - 1 ( i ) aijbj ( ot ) ; 1≤ j ≤N , 1 ...
... VITERBI ( observations of len T , state - graph of len N ) returns best - path create a path probability matrix viterbi [ N + 2 , T ] ; initialization step for each state s from 1 to N do viterbi [ s , 1 ] ← ao , s * bs ( 01 ) ...
... Viterbi training Forced alignment the system converges. During each iteration, as discussed in Chapter 6, we compute ... Viterbi algorithm. In Viterbi training, instead of accumulating counts by a sum over all paths that pass ...
Other editions - View all
Speech and Language Processing: An Introduction to Natural Language ... Daniel Jurafsky,James H. Martin No preview available - 2009 |