Speech quality of VoIP: assessment and prediction
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Chichester [u.a.]
Wiley
2006
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| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis Beschreibung für Leser Inhaltsverzeichnis |
| Beschreibung: | Literaturverz. S. [285] - 301 |
| Beschreibung: | XXV, 309 S. graph. Darst. |
| ISBN: | 0470030607 |
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Datensatz im Suchindex
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| adam_text | SPEECH QUALITY OF VOIP ASSESSMENT AND PREDICTION ALEXANDER RAAKE
DEUTSCHE TELEKOM LABORATORIES, GERMANY JOHN WILEY & SONS, LTD CONTENTS
PREFACE XI LIST OF ABBREVIATIONS XIII INTRODUCTION XXI 1 SPEECH QUALITY
IN TELEPHONY 1 1.1 SPEECH 1 1.1.1 SPEECH ACOUSTICS 3 1.1.2 SPEECH
PERCEPTION 4 1.2 SPEECH QUALITY 13 1.2.1 DEFINITION OF QUALITY 15 1.2.2
SPEECH QUALITY ASSESSMENT 16 1.2.3 QUALITY ELEMENTS 18 1.2.4 SPEECH
QUALITY AND QUALITY OF SERVICE 19 2 SPEECH QUALITY MEASUREMENT METHODS
23 2.1 AUDITORY METHODS 24 2.1.1 UTILITARIAN METHODS 25 2.1.2 ANALYTICAL
METHODS 34 2.2 INSTRUMENTAL METHODS 39 2.2.1 SIGNAL-BASED MODELS 40
2.2.2 PARAMETER-BASED MODELS 42 2.2.3 MONITORING MODELS 46 2.3 SPEECH
QUALITY MEASUREMENT METHODS: SUMMARY 49 3 QUALITY ELEMENTS AND QUALITY
FEATURES OF VOIP 51 3.1 SPEECH TRANSMISSION USING INTERNET PROTOCOL 51
3.1.1 VOIP APPLICATIONS 54 3.1.2 VOIP QUALITY OF SERVICE 55 3.2 OVERVIEW
OF QUALITY ELEMENTS 56 3.3 QUALITY ELEMENTS AND RELATED FEATURES 58
3.3.1 VOICE ACTIVITY DETECTION (VAD) 58 3.3.2 CODECS 58 3.3.3 JITTER 61
3.3.4 DELAY 61 VLLL CONTENTS 3.3.5 PACKET LOSS 63 3.3.6 BIT ERRORS 78
3.3.7 TALKER ECHO 79 3.3.8 LISTENER ECHO 80 3.3.9 ECHO CANCELLERS 80
3.3.10 LOUDNESS 82 3.3.11 NOISE 83 3.3.12 NOISE SUPPRESSION 85 3.3.13
LINEAR DISTORTION AND WIDEBAND TRANSMISSION 85 3.3.14 USER INTERFACES 90
3.4 QUALITY DIMENSIONS 91 3.5 COMBINED ELEMENTS AND COMBINED FEATURES 98
3.6 LISTENING AND CONVERSATIONAL FEATURES 98 3.7 DESIRED NATURE 99 3.7.1
CONTEXT 101 3.7.2 COST 101 3.7.3 SERVICE OPTIONS 102 3.8 OPEN QUESTIONS
102 3.9 FROM ELEMENTS TO FEATURES: MODELING VOIP SPEECH QUALITY 103
3.9.1 SIGNAL-BASED MEASURES AND VOIP 104 3.9.2 PARAMETRIC MODELS AND
VOIP 105 3.10 QUALITY ELEMENTS AND QUALITY FEATURES OF VOIP: SUMMARY 108
4 TIME-VARYING DISTORTION: QUALITY FEATURES AND MODELING 111 4.1
MICROSCOPIC LOSS BEHAVIOR 113 4.1.1 RANDOM PACKET LOSS 113 4.1.2
DEPENDENT PACKET LOSS 123 4.2 MACROSCOPIC LOSS BEHAVIOR 129 4.2.1
MACROSCOPIC LOSS WITH SEGMENTS OF RANDOM LOSS 130 4.2.2 MACROSCOPIC LOSS
WITH SEGMENTS OF DEPENDENT LOSS 135 4.3 INTERACTIVITY 147 4.4 PACKET
LOSS AND COMBINED IMPAIRMENTS 151 4.4.1 ADDITIVITY AND MULTIDIMENSIONAL
FEATURE SPACE 152 4.4.2 MICROSCOPIC LOSS BEHAVIOR: RANDOM PACKET LOSS
154 4.4.3 MACROSCOPIC LOSS BEHAVIOR: 3-STATE MARKOV LOSS 162 4.4.4
MODEL: PACKET LOSS AND COMBINED IMPAIRMENTS 168 4.5 TIME-VARYING
DISTORTION: SUMMARY 172 5 WIDEBAND SPEECH, LINEAR AND NON LINEAR
DISTORTION: QUALITY FEATURES AND MODELING 175 5.1 WIDEBAND SPEECH:
IMPROVEMENT OVER NARROWBAND 176 5.1.1 SUMMARY 181 5.2 BANDPASS-FILTERED
SPEECH 181 5.2.1 LISTENING TEST 182 5.2.2 PARAMETRIC IMPAIRMENT MODEL
184 5.3 WIDEBAND CODECS 189 5.4 DESIRED NATURE 190 CONTENTS IX 5.4.1
USER INTERFACES 192 5.4.2 CONTENT 197 5.4.3 SUMMARY 203 6 FROM ELEMENTS
TO FEATURES: EXTENSIONS OF THE E-MODEL 205 6.1 E-MODEL: PACKET LOSS 205
6.2 E-MODEL: ADDITIVITY 206 6.3 E-MODEL: WIDEBAND, LINEAR AND NON-LINEAR
DISTORTION 208 7 SUMMARY AND CONCLUSIONS 211 8 OUTLOOK 215 A ASPECTS OF
A PARAMETNC DESCNPTION OF TIME-VARYING DISTORTION 217 A.L 4-STATE MARKOV
CHAIN: SOJOURN IN BAD AND GOOD STATE 217 A.2 IMPACT OF OTHER QUALITY
ELEMENTS ON PACKET LOSS 219 A.2.1 FORWARD ERROR CORRECTION 219 A.2.2
JITTER AND JITTER BUFFER 220 A.3 IMPAIRMENT UNDER GSM BIT ERRORS 223 B
SIMULATION OF QUALITY ELEMENTS 225 B.L PSTN/ISDN 226 B.L.L INSTRUMENTAL
VERIFICATION 228 B.2 MOBILE NETWORKS 228 B.3 VOIP 229 B.3.1 ANALOG TO
ISDN CONVERSION 229 B.3.2 VOIP GATEWAYS 230 B.3.3 IP NETWORK SIMULATION
231 B.3.4 INSTRUMENTAL VERIFICATION 233 B.4 WIDEBAND TRANSMISSION 234
B.5 USER INTERFACES 234 B.5.1 HANDSET TELEPHONES 235 B.5.2 HEADSETS 235
B.5.3 WIDEBAND HANDSET AND HI-FI PHONE 235 B.5.4 BANDPASS FILTERS 237
B.5.5 HANDS-FREE TERMINALS (HFTS) 238 B.6 TESTROOMS 241 B.7 SIMULATION
OF QUALITY ELEMENTS: SUMMARY 241 C FREQUENCY RESPONSES 245 C.L
TRANSMISSION BANDPASS 245 C.L.L NARROWBAND 245 C.1.2 WIDEBAND 246 C.2
USER INTERFACES 247 C.2.1 HEADSETS 247 C.2.2 WIDEBAND HANDSETS 248 X
CONTENTS D TEST DATA NORMALIZATION AND TRANSFORMATION 251 D.L
EQUIVALENT-Q METHOD 251 D.2 METHOD ACCORDING TO ITU-T REC. P.833 252 D.3
LINEAR TRANSFORMATION 252 D.4 NOTE ON MOS-TERMINOLOGY 253 E E-MODEL
ALGORITHM 255 F INTERACTIVE SHORT CONVERSATION TEST SCENARIOS (ISCTS)
261 F.L EXAMPLE 262 G AUDITORY TEST SETTINGS AND RESULTS 265 G.L GLOBAL
SYSTEM FOR MOBILE (GSM): SHORT CONVERSATION AND LISTENING ONLY TEST 265
G.2 2-STATE MARKOV LOSS: LISTENING ONLY TEST 267 G.3 RANDOM LOSS:
CONVERSATION TEST 268 G.3.1 TEST SETUP 268 G.3.2 TEST PROCEDURA 269
G.3.3 SUBJECTS 270 G.3.4 DETAILS ON SELECTED RESULTS 270 G.4 3-STATE
MARKOV LOSS: CONVERSATION TEST 271 G.4.1 TEST SETUP 271 G.4.2 TEST
PROCEDURE AND TEST SUBJECTS 272 G.4.3 DETAILS ON SELECTED RESULTS 273
G.5 SPEECH SOUND QUALITY AND CONTENT 274 H MODELING DETAILS 277 H.L
TIME-VARYING DISTORTIONS 277 H.1.1 MACROSCOPIC LOSS BEHAVIOR 277 I
GLOSSARY 281 BIBLIOGRAPHY 285 INDEX 303
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| discipline | Elektrotechnik / Elektronik / Nachrichtentechnik |
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| isbn | 0470030607 |
| language | English |
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| spellingShingle | Raake, Alexander Speech quality of VoIP assessment and prediction Internettelefonie (DE-588)4770362-3 gnd |
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| title | Speech quality of VoIP assessment and prediction |
| title_auth | Speech quality of VoIP assessment and prediction |
| title_exact_search | Speech quality of VoIP assessment and prediction |
| title_full | Speech quality of VoIP assessment and prediction Alexander Raake |
| title_fullStr | Speech quality of VoIP assessment and prediction Alexander Raake |
| title_full_unstemmed | Speech quality of VoIP assessment and prediction Alexander Raake |
| title_short | Speech quality of VoIP |
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