Lam Hiu Sing. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references. / Text in English; abstracts in English and Chinese. / Lam Hiu Sing. / Acknowledgement --- p.5 / Chapter I. --- Table of Content --- p.6 / Chapter II. --- Lists of Tables --- p.9 / Chapter III. --- Lists of Figures --- p.11 / Chapter Chapter 1 --- Introduction --- p.13 / Chapter 1.1 --- Intelligence gathering by surveillance --- p.13 / Chapter 1.2 --- Speech recognition and keyword spotting --- p.16 / Chapter 1.3 --- Audio indexing and searching --- p.18 / Chapter 1.3.1 --- Nature of audio sources --- p.18 / Chapter 1.3.2 --- Different searching objectives --- p.19 / Chapter 1.4 --- Objective of thesis --- p.22 / Chapter 1.5 --- Thesis outline --- p.23 / Chapter 1.6 --- References --- p.24 / Chapter Chapter 2 --- HMM-based Keyword Spotting System --- p.28 / Chapter 2.1 --- Statistical speech model --- p.28 / Chapter 2.1.1 --- Speech signal representations --- p.29 / Chapter 2.1.2 --- Acoustic modeling --- p.29 / Chapter 2.1.3 --- HMM message generation model --- p.32 / Chapter 2.2 --- Basics of keyword spotting --- p.34 / Chapter 2.2.1 --- Keyword and non-keyword modeling --- p.34 / Chapter 2.2.2 --- Language model --- p.37 / Chapter 2.2.3 --- Performance measure --- p.38 / Chapter 2.3 --- Keyword spotting applications --- p.39 / Chapter 2.3.1 --- Information query system --- p.40 / Chapter 2.3.2 --- Topic identification system --- p.41 / Chapter 2.3.3 --- Audio indexing and searching system --- p.42 / Chapter 2.3.4 --- Lexicon learning system --- p.42 / Chapter 2.4 --- Summary --- p.43 / Chapter 2.5 --- References --- p.44 / Chapter Chapter 3 --- Cantonese Characteristics --- p.49 / Chapter 3.1 --- Cantonese Dialect --- p.49 / Chapter 3.2 --- Phonological properties of Cantonese --- p.51 / Chapter 3.2.1 --- Initials and finals of Cantonese --- p.51 / Chapter 3.2.2 --- Tones of Cantonese --- p.54 / Chapter 3.3 --- Summary --- p.55 / Chapter 3.4 --- References --- p.55 / Chapter Chapter 4 --- System Configuration for Audio Search of Surveillance Data --- p.57 / Chapter 4.1 --- Audio Search of Surveillance Data --- p.57 / Chapter 4.2 --- Requirements and Specifications of the Proposed Audio Search System --- p.59 / Chapter 4.3 --- Proposed Audio Search System Architecture --- p.62 / Chapter 4.4 --- Summary --- p.65 / Chapter 4.5 --- References --- p.66 / Chapter Chapter 5 --- Development of a Keyword Spotting based Audio Indexing and Searching System --- p.67 / Chapter 5.1 --- Acoustic Models for Keywords and Fillers --- p.67 / Chapter 5.2 --- Adaptation mechanism --- p.76 / Chapter 5.2.1 --- Adaptation techniques --- p.76 / Chapter 5.2.2 --- Adaptation strategy for MLLR --- p.85 / Chapter 5.3 --- Language model --- p.86 / Chapter 5.4 --- Summary --- p.88 / Chapter 5.5 --- References --- p.88 / Chapter Chapter 6 --- System Evaluations --- p.93 / Chapter 6.1 --- Data for training and evaluation of the system --- p.94 / Chapter 6.1.1 --- Training Data --- p.94 / Chapter 6.1.2 --- Evaluation data --- p.95 / Chapter 6.1.3 --- Performance measure --- p.97 / Chapter 6.2 --- Cluster settings for MLLR adaptation --- p.98 / Chapter 6.3 --- Effects of word insertion penalty --- p.102 / Chapter 6.4 --- Acoustic modeling performance comparisons --- p.103 / Chapter 6.4.1 --- System robustness test --- p.104 / Chapter 6.4.2 --- The performance limit --- p.105 / Chapter 6.5 --- Overall System Performance --- p.107 / Chapter 6.6 --- Summary --- p.108 / Chapter 6.7 --- References --- p.108 / Chapter Chapter 7 --- Conclusions and Future Works --- p.109 / Chapter 7.1 --- Conclusions --- p.109 / Chapter 7.2 --- Future works --- p.110 / Chapter 7.2.1 --- Discriminative adaptation --- p.110 / Chapter 7.2.2 --- Pronunciation dictionary --- p.111 / Chapter 7.2.3 --- Channel effect --- p.111
| Identifer | oai:union.ndltd.org:cuhk.edu.hk/oai:cuhk-dr:cuhk_323391 |
| Date | January 2001 |
| Contributors | Lam, Hiu Sing., Chinese University of Hong Kong Graduate School. Division of Electronic Engineering. |
| Source Sets | The Chinese University of Hong Kong |
| Language | English, Chinese |
| Detected Language | English |
| Type | Text, bibliography |
| Format | print, 112 leaves : ill. ; 30 cm. |
| Rights | Use of this resource is governed by the terms and conditions of the Creative Commons “Attribution-NonCommercial-NoDerivatives 4.0 International” License (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
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