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E-raamat: Handbook of Standards and Resources for Spoken Language Systems, v. 2, Spoken Language Characterization [De Gruyter e-raamatud]

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User's guide
1(28)
Background
1(3)
Eagles objectives
1(1)
Eagles organisational structure
2(1)
Eagles workplan
3(1)
Spoken Language systems, standards and resources
4(5)
Spoken Language systems
4(1)
Standards and resources for Spoken Language systems
5(4)
The Eagles Spoken Language Working Group (WG5)
9(5)
Subgroups of the Eagles Spoken Language Working Group
11(1)
Relationships with the other Eagles Working Groups
11(1)
Workshops
11(2)
Production of the handbook
13(1)
Consultation with the R&D Community
13(1)
Overview of the handbook
14(11)
Intended readership
14(1)
Scope
15(6)
The main chapters of the handbook
21(4)
The current state of play
25(1)
Possible future actions
25(2)
Revision and completion of existing documentation
25(1)
Extended survey of existing practice
25(1)
Extension of language base
26(1)
Terminology
26(1)
Move to prescriptive recommendations
26(1)
Publication and dissemination
26(1)
Coordination with other bodies
26(1)
Contact points
27(1)
Acknowledgements
28(1)
Part II: Spoken language characterisation 29(168)
Spoken language lexica
30(61)
Introduction
30(8)
Lexica for spoken language systems
30(1)
Lexical information as properties of words
31(6)
Recommendations on resources
37(1)
What is a spoken language lexicon?
38(8)
Basic features of a spoken language lexicon
38(1)
Lexical databases and system lexica for spoken language
39(2)
Spoken language and written language lexica
41(2)
Basic lexicographic coverage criteria
43(1)
The lexicon in spoken language recognition systems
44(1)
Recommendations on defining spoken language lexica
45(1)
Types of lexical information in spoken language lexica
46(11)
Lexicon models and lexical representation
46(1)
A simple sign model for lexical properties
47(2)
Lexical units
49(5)
Lexical properties and lexical relations in spoken language
54(2)
Recommendations on types of lexical information
56(1)
Lexical surface information
57(9)
Orthographic information
57(1)
Pronunciation information
58(5)
Prosodic information
63(2)
Recommendations on lexical surface information
65(1)
Morphological information
66(4)
Types of morphological information
66(1)
Applications of morphology
67(3)
Recommendations on morphology
70(1)
Grammatical information
70(3)
Statistical language models
70(1)
Sentence syntax information
71(1)
Recommendations on grammatical information
72(1)
Lexical content information
73(2)
Lexical semantic information
73(1)
Pragmatic information
73(1)
Idiomatic information
74(1)
Recommendations on semantic information
75(1)
Lexicon structure
75(10)
Spoken language lexicon formalisms
75(2)
Lexicon architecture and lexical database structure
77(2)
Lexicon architecture and the structure of lexical databases
79(6)
Recommendations on lexicon structure
85(1)
Lexical knowledge acquisition for spoken language
85(4)
Stages in lexical knowledge acquisition
85(1)
Types of knowledge source
86(2)
Recommendations on lexicon construction
88(1)
Outlook
89(2)
Language models
91(51)
Introduction
91(1)
Goals of the chapter
91(1)
Advice to the reader
92(1)
System architecture for speech recognition
92(7)
Bayes decision rule
92(2)
Stochastic language modelling
94(3)
Types of language models
97(1)
Why does the trigram language model work?
98(1)
Perplexity definition
99(3)
Formal definition
99(1)
Implications of the perplexity definition
100(1)
Extensions of the perplexity definition
101(1)
Recommendations
101(1)
Language model smoothing: modelling unseen events
102(5)
Problem formulation
102(1)
Linear discounting and backing-off
103(3)
Linear interpolation
106(1)
Absolute discounting and backing-off
106(1)
Conclusion
107(1)
Multilevel smoothing for trigram models
107(9)
Problem formulation
107(1)
The full trigram model
108(1)
Practical issues
109(1)
Cache
110(1)
Experimental results
111(4)
Recommendations: m-gram language models
115(1)
Refined language models
116(8)
Equivalence histories and word classes
116(4)
Grammar based language models
120(4)
Recommendations: Refined language models
124(1)
Language models and search
124(11)
Sources of recognition errors
124(1)
Search: Finding the single best sentence
125(4)
Search: Word graphs
129(6)
Recommendations: Language models and search
135(1)
Final note: the mathematics of smoothing
135(7)
Linear discounting and backing-off
135(3)
Linear interpolation
138(2)
Absolute discounting and backing-off
140(2)
Physical characterisation and description
142(55)
Introduction
142(3)
The communication chain
143(1)
Specifications for speech corpora production and speech assessment environments
144(1)
Recommendations on recording strategies
145(1)
Basic notations and terminology
145(4)
Periodic and aperiodic motion
145(1)
The dB scale
146(1)
Phones and sones
147(1)
Analog and digital speech signal representation
147(2)
Talker/listener descriptors
149(6)
General (demographic) descriptors
149(1)
Task specific descriptors
150(5)
Transducer characteristics
155(20)
Microphones and speech recordings
156(15)
Parallel recordings
171(4)
Environment characteristics
175(10)
Artificial vs. natural environment
175(1)
Auditory environment
176(8)
Visual environment
184(1)
Miscellaneous environmental factors
185(1)
Recording chain characteristics
185(5)
Signals and systems
186(1)
Linear distortions
187(2)
Non-linear distortions
189(1)
Recommendations on recording chain characteristics
189(1)
Reproducibility assurance procedures
190(3)
Description of recording conditions
190(1)
References and standards
191(1)
Recommendations on reproducibility
192(1)
Analysis and conditioning tools for speech signals
193(4)
Signal analysis and measurement
193(1)
Signal conditioning
194(1)
Recommendations on analysis and conditioning tools for speech signals
195(2)
Bibliographical references 197(16)
Glossary 213(14)
List of abbreviations 227(6)
Index 233