{"title":"A Non-Iterative Kalman Filter for Single Channel Speech Enhancement in Non-Stationary Noise Condition","authors":"S. Roy, K. Paliwal","doi":"10.1109/ICSPCS.2018.8631732","DOIUrl":null,"url":null,"abstract":"This paper presents a non-iterative Kalman filter (NIT-KF) for single channel speech enhancement in nonstationary noise condition (NNC). To adopt NIT-KF with NNC, we address the adjustment of biased Kalman gain through efficient parameter estimation. We introduce an effective noise spectrum tracking method based on decision directed approach (DDA) controlled through a posteriori SNR and speech activity detector (SAD). With the estimated noise spectrum, the spectral over subtraction (SOS) algorithm is employed to the noisy speech; this gives a pre-filtered speech (PFS). The noise variance and LPCs are computed from the estimated noise and PFS, respectively. These are applied to NIT-KF to produce the enhanced speech. It is shown that the adjusted Kalman gain in NIT-KF is effective in minimizing the additive noise effect to an acceptable level. Extensive simulation results reveal that the proposed method outperforms other benchmark methods.","PeriodicalId":179948,"journal":{"name":"2018 12th International Conference on Signal Processing and Communication Systems (ICSPCS)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2018 12th International Conference on Signal Processing and Communication Systems (ICSPCS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICSPCS.2018.8631732","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
This paper presents a non-iterative Kalman filter (NIT-KF) for single channel speech enhancement in nonstationary noise condition (NNC). To adopt NIT-KF with NNC, we address the adjustment of biased Kalman gain through efficient parameter estimation. We introduce an effective noise spectrum tracking method based on decision directed approach (DDA) controlled through a posteriori SNR and speech activity detector (SAD). With the estimated noise spectrum, the spectral over subtraction (SOS) algorithm is employed to the noisy speech; this gives a pre-filtered speech (PFS). The noise variance and LPCs are computed from the estimated noise and PFS, respectively. These are applied to NIT-KF to produce the enhanced speech. It is shown that the adjusted Kalman gain in NIT-KF is effective in minimizing the additive noise effect to an acceptable level. Extensive simulation results reveal that the proposed method outperforms other benchmark methods.