Speech and Audio Coding for Wireless and Network Applications

✍ Scribed by Bishnu S. Atal, Vladimir Cuperman, Allen Gersho (auth.), Bishnu S. Atal, Vladimir Cuperman, Allen Gersho (eds.)

• Publisher: Springer US
• Year: 1993
• Tongue: English
• Leaves: 266
• Series: The Springer International Series in Engineering and Computer Science 224
• Edition: 1
• Category: Library

✦ Synopsis

Speech and Audio Coding for Wireless and Network Applications contains 34 chapters, loosely grouped into six topical areas. The chapters in this volume reflect the progress and present the state of the art in low-bit-rate speech coding, primarily at bit rates from 2.4 kbit/s to 16 kbit/s. Together they represent important contributions from leading researchers in the speech coding community.
Speech and Audio Coding for Wireless and Network Applications contains contributions describing technologies that are under consideration as standards for such applications as digital cellular communications (the half-rate American and European coding standards). A brief Introduction is followed by a section dedicated to low-delay speech coding, a research direction which emerged as a result of the CCITT requirement for a universal low-delay 16 kbit/s speech coding technology and now continues with the objective of achieving toll quality with moderate delay at a rate of 8 kbit/s. A section on the important topic of speech quality evaluation is then presented. This is followed by a section on speech coding for wireless transmission, and a section on audio coding which covers not only 7 kHz bandwidth speech, but also wideband coding applicable to high fidelity music. The book concludes with a section on speech coding for noisy transmission channels, followed by a section addressing future research directions.
Speech and Audio Coding for Wireless and Network Applications presents a cross-section of the key contributions in speech and audio coding which have emerged recently. For this reason, the book is a valuable reference for all researchers and graduate students in the speech coding community.

✦ Table of Contents

Front Matter....Pages i-ix
Front Matter....Pages 1-2
Introduction....Pages 1-2
Front Matter....Pages 3-3
High Quality Low-Delay Speech Coding at 12 kb/s....Pages 5-9
Low Delay Speech Coder at 8 kbit/s with Conditional Pitch Prediction....Pages 11-18
Low Delay Coding of Speech and Audio Using Nonuniform Band Filter Banks....Pages 19-23
8 kb/s Low-Delay CELP Coding of Speech....Pages 25-31
Lattice Low Delay Vector Excitation for 8 kb/s Speech Coding....Pages 33-40
Front Matter....Pages 41-41
Subjective Assessment Methods for the Measurement of Digital Speech Coder Quality....Pages 43-53
Speech Quality Evaluation of the European, North-American and Japanese Speech Coding Standards for Digital Cellular Systems....Pages 55-58
A Comparison of Subjective Methods for Evaluating Speech Quality....Pages 59-65
Front Matter....Pages 67-67
Delayed Decision Coding of Pitch and Innovation Signals in Code-Excited Linear Prediction Coding of Speech....Pages 69-76
Variable Rate Speech Coding for Cellular Networks....Pages 77-84
QCELP: A Variable Rate Speech Coder for CDMA Digital Cellular....Pages 85-92
Performance and Optimization of a GSM Half Rate Candidate....Pages 93-99
Joint Design of Multi-Stage VQ Codebooks for LSP Quantization with Applications to 4 kbit/s Speech Coding....Pages 101-109
Waveform Interpolation in Speech Coding....Pages 111-118
Front Matter....Pages 119-119
A Wideband CELP Coder at 16 kbit/s for Real Time Applications....Pages 121-125
Multirate STC and Its Application to Multi-Speaker Conferencing....Pages 127-131
Low Delay Coding of Wideband Speech at 32 Kbps Using Tree Structures....Pages 133-139
A Two-Band CELP Audio Coder at 16 kbit/s and Its Evaluation....Pages 141-145
9.6 kbit/s ACELP Coding of Wideband Speech....Pages 147-152
Front Matter....Pages 119-119
High Fidelity Audio Coding with Generalized Product Code VQ....Pages 153-159
Front Matter....Pages 161-161
On Noisy Channel Quantizer Design for Unequal Error Protection....Pages 163-170
Channel Coding Schemes for the GSM Half-Rate System....Pages 171-179
Combined Source-Channel Coding of LSP Parameters Using Multi-Stage Vector Quantization....Pages 181-190
Vector Quantization of LPC Parameters in the Presence of Channel Errors....Pages 191-201
Error Control and Index Assignment for Speech Codecs....Pages 203-207
Front Matter....Pages 209-209
Efficient Techniques for Determining and Encoding the Long Term Predictor Lags for Analysis-by-Synthesis Speech Coders....Pages 211-216
Structured Stochastic Codebook and Codebook Adaptation for CELP....Pages 217-224
Efficient Multi-Tap Pitch Prediction for Stochastic Coding....Pages 225-229
QR Factorization in the CELP Coder....Pages 231-237
Efficient Frequency-Domain Representation of LPC Excitation....Pages 239-249
Product Code Vector Quantization of LPC Parameters....Pages 251-258
A Mixed Excitation LPC Vocoder with Frequency-Dependent Voicing Strength....Pages 259-264
Adaptive Predictive Coding with Transform Domain Quantization....Pages 265-269
Finite-State VQ Excitations for CELP Coders....Pages 271-276
Back Matter....Pages 277-283

✦ Subjects

Signal, Image and Speech Processing; Electrical Engineering