Acoustic Signal Processing for Telecommunication

1. Front Matter

   Pages i-xxii

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2. An Introduction to Acoustic Echo and Noise Control

   1. An Introduction to Acoustic Echo and Noise Control

      • Steven L. Gay, Jacob Benesty

      Pages 1-19

3. Mono-Channel Acoustic Echo Cancellation

   1. Front Matter

      Pages 21-21

      PDF

   2. The Fast Affine Projection Algorithm

      • Steven L. Gay

      Pages 23-45

   3. Subband Acoustic Echo Cancellation Using the FAP-RLS Algorithm: Fixedpoint Implementation Issues

      • Mohamed Ghanassi, Benoit Champagne

      Pages 47-65

   4. Real-Time Implementation of the Exact Block NLMS Algorithm for Acoustic Echo Control in Hands-Free Telephone Systems

      • Bernhard H. Nitsch

      Pages 67-80

   5. Double-Talk Detection Schemes for Acoustic Echo Cancellation

      • Tomas Gänsler, Jacob Benesty, Steven L. Gay

      Pages 81-97

4. Multi-Channel Acoustic Echo Cancellation

   1. Front Matter

      Pages 99-99

      PDF

   2. Multi-Channel Sound, Acoustic Echo Cancellation, and Multi-Channel Time-Domain Adaptive Filtering

      • Jacob Benesty, Tomas Gänsler, Peter Eneroth

      Pages 101-120

   3. Multi-Channel Frequency-Domain Adaptive Filtering

      • Jacob Benesty, Dennis R. Morgan

      Pages 121-133

   4. A Real-Time Stereophonic Acoustic Subband Echo Canceler

      • Peter Eneroth, Steven L. Gay, Tomas Gänsler, Jacob Benesty

      Pages 135-152

5. Noise Reduction Techniques With a Single Microphone

   1. Front Matter

      Pages 153-153

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   2. Subband Noise Reduction Methods for Speech Enhancement

      • Eric J. Diethorn

      Pages 155-178

6. Microphone Arrays

   1. Front Matter

      Pages 179-179

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   2. Superdirectional Microphone Arrays

      • Gary W. Elko

      Pages 181-237

   3. Microphone Arrays for Video Camera Steering

      • Yiteng Huang, Jacob Benesty, Gary W. Elko

      Pages 239-259

   4. Nonlinear, Model-Based Microphone Array Speech Enhancement

      • Michael S. Brandstein, Scott M. Griebel

      Pages 261-279

7. Virtual Sound

   1. Front Matter

      Pages 281-281

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   2. 3D Audio and Virtual Acoustical Environment Synthesis

      • Jiashu Chen

      Pages 283-301

   3. Virtual Sound Using Loudspeakers: Robust Acoustic Crosstalk Cancellation

      • Darren B. Ward, Gary W. Elko

      Pages 303-317

158 2. Wiener Filtering 159 3. Speech Enhancement by Short-Time Spectral Modification 3. 1 Short-Time Fourier Analysis and Synthesis 159 160 3. 2 Short-Time Wiener Filter 161 3. 3 Power Subtraction 3. 4 Magnitude Subtraction 162 3. 5 Parametric Wiener Filtering 163 164 3. 6 Review and Discussion Averaging Techniques for Envelope Estimation 169 4. 169 4. 1 Moving Average 170 4. 2 Single-Pole Recursion 170 4. 3 Two-Sided Single-Pole Recursion 4. 4 Nonlinear Data Processing 171 5. Example Implementation 172 5. 1 Subband Filter Bank Architecture 172 173 5. 2 A-Posteriori-SNR Voice Activity Detector 5. 3 Example 175 6. Conclusion 175 Part IV Microphone Arrays 10 Superdirectional Microphone Arrays 181 Gary W. Elko 1. Introduction 181 2. Differential Microphone Arrays 182 3. Array Directional Gain 192 4. Optimal Arrays for Spherically Isotropic Fields 193 4. 1 Maximum Gain for Omnidirectional Microphones 193 4. 2 Maximum Directivity Index for Differential Microphones 195 4. 3 Maximimum Front-to-Back Ratio 197 4. 4 Minimum Peak Directional Response 200 4. 5 Beamwidth 201 5. Design Examples 201 5. 1 First-Order Designs 202 5. 2 Second-Order Designs 207 5. 3 Third-Order Designs 216 5. 4 Higher-Order designs 221 6. Optimal Arrays for Cylindrically Isotropic Fields 222 6. 1 Maximum Gain for Omnidirectional Microphones 222 6. 2 Optimal Weights for Maximum Directional Gain 224 6. 3 Solution for Optimal Weights for Maximum Front-to-Back Ratio for Cylindrical Noise 225 7. Sensitivity to Microphone Mismatch and Noise 230 8.

• Adaptive Filter
• Duplex
• Signal
• acoustics
• blind source separation
• communication
• detection
• digital signal processing
• filtering
• filters
• network
• signal processing
• tables
• telecommunications

• Bell Laboratories, Lucent Technologies, USA

  Steven L. Gay, Jacob Benesty

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