Predicting the performance of a speech recognition task.

Yau Pui Yuk.Thesis (M.Phil.)--Chinese University of Hong Kong, 2002.Includes bibliographical references (leaves 147-152).Abstracts in English and Chinese.Chapter 1 --- Introduction --- p.1Chapter 1.1 --- Overview --- p.1Chapter 1.2 --- Speech Recognition --- p.2Chapter 1.2.1 --- How Speech Recognition Works --- p.3Chapter 1.2.2 --- Types of Speech Recognition Tasks --- p.4Chapter 1.2.3 --- Variabilities in Speech 一 a Challenge for Speech Recog- nition --- p.6Chapter 1.3 --- Performance Prediction of Speech Recognition Task --- p.7Chapter 1.4 --- Thesis Goals --- p.9Chapter 1.5 --- Thesis Organization --- p.10Chapter 2 --- Background --- p.11Chapter 2.1 --- The Acoustic-phonetic Approach --- p.12Chapter 2.1.1 --- Prediction based on the Degree of Mismatch --- p.12Chapter 2.1.2 --- Prediction based on Acoustic Similarity --- p.13Chapter 2.1.3 --- Prediction based on Between-Word Distance --- p.14Chapter 2.2 --- The Lexical Approach --- p.16Chapter 2.2.1 --- Perplexity --- p.16Chapter 2.2.2 --- SMR-perplexity --- p.17Chapter 2.3 --- The Combined Acoustic-phonetic and Lexical Approach --- p.18Chapter 2.3.1 --- Speech Decoder Entropy (SDE) --- p.19Chapter 2.3.2 --- Ideal Speech Decoding Difficulty (ISDD) --- p.20Chapter 2.4 --- Chapter Summary --- p.23Chapter 3 --- Components for Predicting the Performance of Speech Recog- nition Task --- p.24Chapter 3.1 --- Components of Speech Recognizer --- p.25Chapter 3.2 --- Word Similarity Measure --- p.27Chapter 3.2.1 --- Universal Phoneme Symbol (UPS) --- p.30Chapter 3.2.2 --- Definition of Phonetic Distance --- p.31Chapter 3.2.3 --- Definition of Word Pair Phonetic Distance --- p.45Chapter 3.2.4 --- Definition of Word Similarity Measure --- p.47Chapter 3.3 --- Word Occurrence Measure --- p.62Chapter 3.4 --- Chapter Summary --- p.64Chapter 4 --- Formulation of Recognition Error Predictive Index (REPI) --- p.65Chapter 4.1 --- Formulation of Recognition Error Predictive Index (REPI) --- p.66Chapter 4.2 --- Characteristics of Recognition Error Predictive Index (REPI) --- p.74Chapter 4.2.1 --- Weakness of Ideal Speech Decoding Difficulty (ISDD) --- p.75Chapter 4.2.2 --- Advantages of Recognition Error Predictive Index (REPI) --- p.79Chapter 4.3 --- Chapter Summary --- p.82Chapter 5 --- Experimental Design and Setup --- p.83Chapter 5.1 --- Objectives --- p.83Chapter 5.2 --- Experiments Preparation --- p.84Chapter 5.2.1 --- Speech Corpus and Speech Recognizers --- p.85Chapter 5.2.2 --- Speech Recognition Tasks --- p.93Chapter 5.2.3 --- Evaluation Criterion --- p.98Chapter 5.3 --- Experiment Categories and their Setup --- p.99Chapter 5.3.1 --- Experiment Category 1 一 Investigating and comparing the overall prediction performance of the two predictive indices --- p.102Chapter 5.3.2 --- Experiment Category 2 一 Comparing the applicability of the word similarity measures of the two predictive indices on predicting the recognition performance --- p.104Chapter 5.3.3 --- Experiment Category 3 - Comparing the applicability of the formulation method of the two predictive indices on predicting the recognition performance --- p.107Chapter 5.3.4 --- Experiment Category 4 一 Comparing the performance of different phonetic distance definitions --- p.109Chapter 5.4 --- Chapter Summary --- p.111Chapter 6 --- Experimental Results and Analysis --- p.112Chapter 6.1 --- Experimental Results and Analysis --- p.113Chapter 6.1.1 --- Experiment Category 1 - Investigating and comparing the overall prediction performance of the two predictive indices --- p.113Chapter 6.1.2 --- Experiment Category 2- Comparing the applicability of the word similarity measures of the two predictive indices on predicting the recognition performance --- p.117Chapter 6.1.3 --- Experiment Category 3 一 Comparing the applicability of the formulation method of the two predictive indices on predicting the recognition performance --- p.124Chapter 6.1.4 --- Experiment Category 4 - Comparing the performance of different phonetic distance definitions --- p.131Chapter 6.2 --- Experimental Summary --- p.137Chapter 6.3 --- Chapter Summary --- p.141Chapter 7 --- Conclusions --- p.142Chapter 7.1 --- Contributions --- p.144Chapter 7.2 --- Future Directions --- p.145Bibliography --- p.147Chapter A --- Table of Universal Phoneme Symbol --- p.153Chapter B --- Vocabulary Lists --- p.157Chapter C --- Experimental Results of Two-words Speech Recognition Tasks --- p.171Chapter D --- Experimental Results of Three-words Speech Recognition Tasks --- p.180Chapter E --- Significance Testing --- p.190Chapter E.1 --- Procedures of Significance Testing --- p.190Chapter E.2 --- Results of the Significance Testing --- p.191Chapter E.2.1 --- Experiment Category 1 --- p.191Chapter E.2.2 --- Experiment Category 2 --- p.192Chapter E.2.3 --- Experiment Category 3 --- p.194Chapter E.2.4 --- Experiment Category 4 --- p.196Chapter F --- Linear Regression Models --- p.19