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Acoustic Signal Processing for Telecommunication - download pdf or read online

By Steven L. Gay, Jacob Benesty

158 2. Wiener Filtering 159 three. Speech Enhancement via Short-Time Spectral amendment three. 1 Short-Time Fourier research and Synthesis 159 a hundred and sixty three. 2 Short-Time Wiener filter out 161 three. three strength Subtraction three. four significance Subtraction 162 three. five Parametric Wiener Filtering 163 164 three. 6 overview and dialogue Averaging concepts for Envelope Estimation 169 four. 169 four. 1 relocating ordinary one hundred seventy four. 2 Single-Pole Recursion one hundred seventy four. three Two-Sided Single-Pole Recursion four. four Nonlinear facts Processing 171 five. instance Implementation 172 five. 1 Subband clear out financial institution structure 172 173 five. 2 A-Posteriori-SNR Voice task Detector five. three instance one hundred seventy five 6. end a hundred seventy five half IV Microphone Arrays 10 Superdirectional Microphone Arrays 181 Gary W. Elko 1. advent 181 2. Differential Microphone Arrays 182 three. Array Directional achieve 192 four. optimum Arrays for Spherically Isotropic Fields 193 four. 1 greatest achieve for Omnidirectional Microphones 193 four. 2 greatest Directivity Index for Differential Microphones 195 four. three Maximimum Front-to-Back Ratio 197 four. four minimal top Directional reaction 2 hundred four. five Beamwidth 201 five. layout Examples 201 five. 1 First-Order Designs 202 five. 2 Second-Order Designs 207 five. three Third-Order Designs 216 five. four Higher-Order designs 221 6. optimum Arrays for Cylindrically Isotropic Fields 222 6. 1 greatest achieve for Omnidirectional Microphones 222 6. 2 optimum Weights for max Directional achieve 224 6. three resolution for optimum Weights for optimum Front-to-Back Ratio for Cylindrical Noise 225 7. Sensitivity to Microphone Mismatch and Noise 230 8.

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References [1] M. M. Sondhi and D. A. Berkley, "Silencing echoes on the telephone network," Proc. of the IEEE, vol. 68, pp. 948-963, Aug. 1980. [2] H. R. Huntly, ''Transmission design ofintertoll telephone trunks," Bell Syst. Tech. , vol. 32, pp. 1019-1036, Sep. 1953. [3] G. Williams and L. S. Moye, "Subjective evaluation of unsuppressed echo in simulated long-delay telephone communications," Proc Inst. Elec. , vol. 118, pp. 401-408,1971. [4] R. R. Riesz and E. T. Klemmer, "Subjective evaluation of delay and echo suppressors in telephone communications," Bell Syst.

11, pp. 195-200, 1961. An Introduction to Acoustic Echo and Noise Control 19 [13] B. Widrow and S. D. Stearns, Adaptive Signal Processing. , 1985. [14] S. J. Orfanidis, Optimum Signal Processing: An Introduction. , 1988. [15] S. Haykin, Adaptive Filter Theory. , 1996. [16] J. S. Lim and A. V. Oppenheim, "Enhancement and bandwidth compression of noisy speech," Proc. of the IEEE, vol. 67, pp. 1586-1604, Dec. 1979. [17] R. Martin, "Spectral subtraction based on minimum statistics," in Proc. EUSIPCO, 1994, pp.

XL, pp. 649-668, May 1961. [12] J. P. A. Lochner and 1. F. Burger, ''The intelligibility of speech under reverberant conditions," Acustica, vol. 11, pp. 195-200, 1961. An Introduction to Acoustic Echo and Noise Control 19 [13] B. Widrow and S. D. Stearns, Adaptive Signal Processing. , 1985. [14] S. J. Orfanidis, Optimum Signal Processing: An Introduction. , 1988. [15] S. Haykin, Adaptive Filter Theory. , 1996. [16] J. S. Lim and A. V. Oppenheim, "Enhancement and bandwidth compression of noisy speech," Proc.

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