A Frequency-Domain Adaptive Line Enhancer With Step-Size Control Based on Mutual Information for Harmonic Noise Reduction

作者：Taghia Jalal^*; Martin Rainer^*

来源：IEEE/ACM Transactions on Audio Speech and Language Processing, 2016, 24(6): 1140-1154.

DOI：10.1109/TASLP.2016.2545920

• Adaptive line enhancer
• step-size control
• mutual information
• correlation
• harmonic noise
• speech enhancement

We propose an adaptive line enhancer with a frequency-dependent step-size. The proposed frequency-domain adaptive line enhancer is used as a single-channel noise reduction system for removing harmonic noise from noisy speech. Our main contribution is to exploit the temporal dependence in the log-magnitude and phase spectra of the noisy speech using mutual information, and to derive a frequency-dependent step-size which detects the presence of harmonic noise in different frequency bins. Our proposed step-size control allows the suppression of harmonic noise and the preservation of speech components. The experiments are performed with different real-life acoustic noises which contain harmonic components. Using instrumental speech intelligibility and quality measures, we demonstrate that the proposed approach can outperform the conventional frequency-domain adaptive line enhancer with a fixed step-size for harmonic noise reduction.

• 出版日期2016-6