Acoustic Signal Processing for Telecommunication

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 Impl...