Kondoz Digital Speech

Coding for Low Bit Rate Communication Systems
2. Auflage 2005
ISBN: 978-0-470-87009-9
Verlag: John Wiley & Sons
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, 458 Seiten, E-Book

Building on the success of the first edition Digital Speechoffers extensive new, updated and revised material based upon thelatest research. This Second Edition continues to providethe fundamental technical background required for low bit ratespeech coding and the hottest developments in digital speech codingtechniques that are applicable to evolving communication systems.
* Features new chapters on Pitch Estimation and Voice-UnvoicedClassification of Speech, Harmonic Speech Coding andMultimode Speech Coding
* Presents a comprehensively revised chapter entitled Analysisby Synthesis LPC Coding including specific examples of popularspeech coders such as CELP (Code-Excited Linear Predictive)Coding
* Contains an updated chapter on Efficient LPC QuantizationMethods including MSVQ and anti-aliasing filtering
* Discusses Voice Activity Detection (VAD) methods
* Offers expanded coverage of speech enhancement techniques suchas echo cancellation and noise suppression
Written by a well-known, highly respected academic, thisauthoritative volume will be invaluable to practising engineers,network designers, computer scientists and advanced students incommunications, electrical and electronic engineering.

Autoren/Hrsg.

Kondoz, A. M.

Inhaltsverzeichnis

Preface.
Acknowledgements.
1 Introduction.
2 Coding Strategies and Standards.
2.1 Introduction.
2.2 Speech Coding Techniques.
2.3 Algorithm Objectives and Requirements.
2.4 Standard Speech Coders.
2.5 Summary.
Bibliography.
3 Sampling and Quantization.
3.1 Introduction.
3.2 Sampling.
3.3 Scalar Quantization.
3.4 Vector Quantization.
3.5 Summary.
Bibliography.
4 Speech Signal Analysis and Modelling.
4.1 Introduction.
4.2 Short-Time Spectral Analysis.
4.3 Linear Predictive Modelling of Speech Signals.
4.4 Pitch Prediction.
4.5 Summary.
Bibliography.
5 Efficient LPC QuantizationMethods.
5.1 Introduction.
5.2 Alternative Representation of LPC.
5.3 LPC to LSF Transformation.
5.4 LSF to LPC Transformation.
5.5 Properties of LSFs.
5.6 LSF Quantization.
5.7 Codebook Structures.
5.8 MSVQ Performance Analysis.
5.9 Inter-frame Correlation.
5.10 Improved LSF Estimation Through Anti-Aliasing Filtering.
5.11 Summary.
Bibliography.
6 Pitch Estimation and Voiced-Unvoiced Classification of Speech.
6.1 Introduction.
6.2 Pitch Estimation Methods.
6.3 Voiced-Unvoiced Classification.
6.4 Summary.
Bibliography.
7 Analysis by Synthesis LPC Coding.
7.1 Introduction.
7.2 Generalized AbS Coding.
7.3 Code-Excited Linear Predictive Coding.
7.4 Summary.
Bibliography.
8 Harmonic Speech Coding.
8.1 Introduction.
8.2 Sinusoidal Analysis and Synthesis.
8.3 Parameter Estimation.
8.4 Common Harmonic Coders.
8.5 Summary.
Bibliography.
9 Multimode Speech Coding.
9.1 Introduction.
9.2 Design Challenges of a Hybrid Coder.
9.3 Summary of Hybrid Coders.
9.4 Synchronized Waveform-Matched Phase Model.
9.5 Hybrid Encoder.
9.6 Speech Classification.
9.7 Hybrid Decoder.
9.8 Performance Evaluation.
9.9 Quantization Issues of Hybrid Coder Parameters.
9.10 Variable Bit Rate Coding.
9.11 Acoustic Noise and Channel Error Performance.
9.12 Summary.
Bibliography.
10 Voice Activity Detection.
10.1 Introduction.
10.2 Standard VAD Methods.
10.3 Likelihood-Ratio-Based VAD.
10.4 Summary.
Bibliography.
11 Speech Enhancement.
11.1 Introduction.
11.2 Review of STSA-based Speech Enhancement.
11.3 Noise Adaptation.
11.4 Echo Cancellation.
11.5 Summary.
Bibliography.
Index.