Voice and Speech Quality Perception: Assessment and Evaluation

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Springer Science & Business Media, Aug 2, 2005 - Computers - 208 pages
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Foundations of Voice and Speech Quality Perception starts out with the fundamental question of: "How do listeners perceive voice and speech quality and how can these processes be modeled?" Any quantitative answers require measurements. This is natural for physical quantities but harder to imagine for perceptual measurands. This book approaches the problem by actually identifying major perceptual dimensions of voice and speech quality perception, defining units wherever possible and offering paradigms to position these dimensions into a structural skeleton of perceptual speech and voice quality. The emphasis is placed on voice and speech quality assessment of systems in artificial scenarios. Many scientific fields are involved. This book bridges the gap between two quite diverse fields, engineering and humanities, and establishes the new research area of Voice and Speech Quality Perception.

 

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Contents

Introduction
1
Aims and Methods of Speech Quality Assessment
5
21 Summary
9
Aspects of Quality Laying the Foundations
11
32 Quality as the design goal
16
33 Designing the quality of innovative entities
18
34 Summary
20
Speech Technology and Speech Quality Perception
23
831 Intelligibility tests in speech technology and audiology
97
84 Summary
102
Towards the Structure of Speech Quality Measurements
105
92 Aspects specific to usage
107
93 Systemic view of speech quality measurements
109
Segmental Intelligibility A Dimension of Quality
113
An introduction
114
1012 The SAM Segmental Test
116

42 Speech synthesis and its different design aims
28
Emphases and aims
29
422 Experience of techniques and expectations of quality
33
43 Elements of quality of speech synthesizers
35
The text as an element of quality
37
45 Synthetic speech as a causal sign
41
46 Functional internal system entities as elements of quality
46
47 Speech synthesis and associated goals in research
47
48 Summary
49
From Speech Perception to Assessment of Quality
53
Form and adaptation
55
53 Interindividual perception
58
54 Speech quality assessment as a measuring process
59
55 Measuring and measurands
61
56 Measuring processes vs investigative processes
64
57 Measuring instruments and measuring organs
65
58 Summary
68
Quality Assessment in View of System Theory
71
Auditory Measuring Procedures
75
72 Measuring scales
80
722 The scale as a function of the measurand
82
73 Summary
86
Formal aspects of speech quality measurements
89
82 Toward the quality of speech quality measurements
92
83 Speech quality tests as measuring tools
96
1013 The Semantically Unpredictable Sentences SUS Test
117
1014 The CLID Test
118
1015 General information on the CLID methodology
119
1016 Test vocabulary as a measuring influence
124
102 On the comparability of study results
129
1027 On the influence of scaling
131
1022 On the influence of the stimulus context
133
1023 On the influence of syllable structure and frequency
134
1024 On the validity of the test results
139
103 Summary
141
The Cluster Similarity Study
143
111 On the background of the study
144
112 Details of the study
148
113 On rating and scaling
149
Similarity profile of prenuclear consonant clusters
153
115 Comparison of the similarity profile of natural and synthetic speech
158
116 Similarity profile for various vowel contexts
164
117 Summary
165
Conclusion
175
References
179
Definitions
199
Subject Index
201
Author Index
205
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