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by A. M. Kondoz
Digital Speech: Coding for Low Bit Rate Communication Systems, 2nd Edition
Cover Page
Title Page
Copyright
Dedication
Contents
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 Quantization Methods
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
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