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Putting Language Into Language Modeling
 In Proc. of Eurospeech99
, 1999
"... In this paper we describe the statistical Structured Language Model (SLM) that uses grammatical analysis of the hypothesized sentence segment (prefix) to predict the next word. We first describe the operation of a basic, completely lexicalized SLM that builds up partial parses as it proceeds left to ..."
Abstract

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In this paper we describe the statistical Structured Language Model (SLM) that uses grammatical analysis of the hypothesized sentence segment (prefix) to predict the next word. We first describe the operation of a basic, completely lexicalized SLM that builds up partial parses as it proceeds left to right. We then develop a chart parsing algorithm and with its help a method to compute the prediction probabilities P (w i+1 jW i ): We suggest useful computational shortcuts followed by a method of training SLM parameters from text data. Finally, we introduce more detailed parametrization that involves nonterminal labeling and considerably improves smoothing of SLM statistical parameters. We conclude by presenting certain recognition and perplexity results achieved on standard corpora. 1. INTRODUCTION In the accepted statistical formulation of the speech recognition problem [1] the recognizer seeks to find the word string c W : = arg max W P (AjW)P (W) where A denotes the observab...