Digital Speech: Coding for Low Bit Rate Communication Systems, 2/e (IE-Paperback)

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Digital Speech: Coding for Low Bit Rate Communication Systems, 2/e (IE-Paperback)

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內容描述

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Description:

Building on the success of the first
edition Digital Speech offers extensive new, updated and revised
material based upon the latest research. This Second Edition continues
to provide the fundamental technical background required for low bit rate
speech coding and the hottest developments in digital speech coding techniques
that are applicable to evolving communication systems.

Features new chapters on Pitch Estimation
and Voice-Unvoiced Classification of Speech, Harmonic Speech Coding and
Multimode Speech Coding
Presents a comprehensively revised chapter
entitled Analysis by Synthesis LPC Coding including specific examples
of popular speech coders such as CELP (Code-Excited Linear Predictive)
Coding
Contains an updated chapter on Efficient LPC
Quantization Methods including MSVQ and anti-aliasing filtering
Discusses Voice Activity Detection (VAD)
methods
Offers expanded coverage of speech enhancement
techniques such as echo cancellation and noise suppression
Written by a well-known, highly respected
academic, this authoritative volume will be invaluable to practising
engineers, network designers, computer scientists and advanced students in
communications, electrical and electronic engineering.

 
 
Table of
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 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.

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