Computer Speech Technology

ISBN-10: 0890062978

ISBN-13: 9780890062975

Edition: 1999

Authors: Robert D. Rodman
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Book details

List price: $35.00
Copyright year: 1999
Publisher: Artech House, Incorporated
Binding: Hardcover
Pages: 344
Size: 6.50" wide x 9.50" long x 1.00" tall
Weight: 1.342
Language: English

Robert D. Rodman is an Associate Professor of Computer Science at North Carolina State University. He holds a Ph.D. in linguistics from UCLA. Dr. Rodman is the author or co-author of three books, including Voice Recognition (Artech House, 1997, 0-89006-927-1).

Preface
About Speech
Introduction
How Speech Is Produced
The Vocal Tract
Articulatory Phonetics
Phonetic Alphabets
Prosody and Suprasegmentals
Syllables
Dialects
Languages (Other Than English)
Acoustic Phonetics
Phonemics
Articulatory Processes
References
Representing Speech in the Computer
Introduction
Microphones
Sampling
Sampling Rate
Quantization
Speech Digitization
Wave Form Coders
Voice Coders (Vocoders)
The Frequency Domain
The Game of Jumble: Spectrum-Cepstrum, Frequency-Quefrency, Filtering-Liftering
Spectrograms: A Hybrid Representation of Speech
References
Speech Recognition
Introduction
Speech Recognition: What It Is; What It Isn't
Why Is Speech Recognition Easy for Us and Difficult for Our Computers?
A Brief History of Speech Recognition
The Era of ARPA
After ARPA
Three Dimensions of Speech Recognition
Continuous Versus Noncontinuous
Speaker-Independent Versus Speaker-Dependent
Vocabulary Size
Tradeoffs and Interactions
Units of Speech Recognition
Words and Phrases
Syllables
Phonemes
Diphones and Triphones
Representing the Units
Acoustic Features
Comparing the Units
Dynamic Time Warping (DTW)
Hidden Markov Models (HMMs)
Future Challenges I
Artificial Neural Networks (ANNs)
Errors
Types of Errors
Error Tolerances
Performance Evaluation of Speech Recognizers
Error Rates
Other Factors
Error Reduction
Environmental Effects
Human Factors
Subsetting
Vocabulary Selection
Error Detection and Correction
Feedback Systems
Higher Levels of Linguistic Knowledge
Automatic Error Correction
Future Challenges II
References
Speech Synthesis
Introduction and History
Parametric Coding (Electronic Synthesis)
Parameters of Parametric Speech Synthesis
Input Units of Parametric Speech Synthesis
Concatenative Synthesis
Allophone Concatenation
Diphone Concatenation
Demisyllable Concatenation
Waveform of Concatenative Units
Text-to-Speech Processing
Rules and Exceptions
Morphological Analysis
Articulation Effects
Prosody
Special Problems
Concept-to-Speech
Languages of the World
Dialects
Performance Evaluation
Intelligibility
Comprehensibility
Pleasantness/Naturalness
Future Challenges
References
Speaker Recognition, Language Identification, and Lip Synchronization
Speaker Recognition
Speaker Recognition Versus Speech Recognition
Types of Speaker Recognition
Text-Dependent, Text-Independent, and Text-Prompted Speaker Recognition
"Voiceprints"
Methods of Speaker Recognition
Noise
Performance Evaluation of Speaker Recognition Systems
Co-channel Speaker Separation
Language Identification
Four Computational Approaches to Language Identification
Performance Evaluation of Language Identification Systems
Lip Synchronization
Visemes
Mapping Directly From the Speech Signal to Mouth Shapes
Future Challenges
References
Applications in Speech Recognition
Criteria for a Viable Speech Recognition Application
Hands Busy, Eyes Busy
Remoteness
Miniaturization
2001 Won't Be 2001
The Role of Human Factors in Speech Recognition Applications
Application Areas
Assistive Technology
Telecommunications
Command and Control
Data Entry and Retrieval
Education
References
Applications in Speech Synthesis
"At the Tone, the Time Will Be..."
When To Use Text-to-Speech; When To Use Digitally Recorded Speech
Interactive Voice Response Systems (IVRs)
Human Factors Revisited
Application Areas
Aid for Persons With Disabilities
Education
Emergency Scenarios
En Masse Advisories
Information Retrieval
Information Reporting
Electronic Mail and Fax Readers
In the Dark
Toys and Games
Transportation
Government Services
Disguise
References
Applications in Speaker Recognition, Language Identification, and Lip Synchronization
Applications in Speaker Recognition
Access
Authentication
Monitoring
Fraud Prevention
Forensics
Personal Services
Applications in Language Identification
Telecommunications
Communications Monitoring
Public Information Systems
Applications in Automatic Lip Synching
Animation
References
Glossary
About the Author
Index
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