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Content Provider | IET Digital Library |
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Author | Trawicki, Marek B. Johnson, Michael T. |
Abstract | In this study, the authors propose multichannel weighted Euclidean (WE) and weighted cosh (WCOSH) cost function estimators for speech enhancement in the distributed microphone scenario. The goal of the work is to illustrate the advantages of utilising additional microphones and modified cost functions for improving signal-to-noise ratio (SNR) and segmental SNR (SSNR) along with log-likelihood ratio (LLR) and perceptual evaluation of speech quality (PESQ) objective metrics over the corresponding single-channel baseline estimators. As with their single-channel counterparts, the perceptually-motivated multichannel WE and WCOSH estimators are functions of a weighting law parameter, which influences attention of the noisy spectral amplitude through a spectral gain function, emphasises spectral peak (formant) information, and accounts for auditory masking effects. Based on the simulation results, the multichannel WE and WCOSH cost function estimators produced gains in SSNR improvement, LLR output and PESQ output over the single-channel baseline results and unweighted cost functions with the best improvements occurring with negative values of the weighting law parameter across all input SNR levels and noise types. |
Starting Page | 337 |
Ending Page | 344 |
Page Count | 8 |
ISSN | 17519675 |
Volume Number | 7 |
e-ISSN | 17519683 |
Issue Number | Issue 4, Jun (2013) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-spr/7/4 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2012.0167 |
Journal | IET Signal Processing |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Bayes Method Channel Estimation Communication Channel Equalisation And Identification Distributed Microphone Scenario Distributed Multichannel Speech Enhancement LLR Log-likelihood Ratio Multichannel Weighted Euclidean Cost Function Estimators Perceptual Evaluation of Speech Quality Objective Metrics Perceptually-motivated Bayesian Estimators Perceptually-motivated Multichannel WE Estimators Segmental SNR Signal to Noise Ratio Single-channel Baseline Estimators Spectral Amplitude Spectral Gain Function Speech And Audio Signal Processing Speech Enhancement Speech Processing Technique SSNR Statistics WCOSH Cost Function Estimators Weighted Cosh Cost Function Estimators |
Content Type | Text |
Resource Type | Article |
Subject | Signal Processing Electrical and Electronic Engineering |
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