{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T12:42:49Z","timestamp":1740141769844,"version":"3.37.3"},"reference-count":27,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2014,4,1]],"date-time":"2014-04-01T00:00:00Z","timestamp":1396310400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/501100003725","name":"National Research Foundation of Korea","doi-asserted-by":"crossref","award":["2012-010636"],"award-info":[{"award-number":["2012-010636"]}],"id":[{"id":"10.13039\/501100003725","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["International Journal of Distributed Sensor Networks"],"published-print":{"date-parts":[[2014,4,1]]},"abstract":"<jats:p> An adaptive noise sensing method is proposed to improve the speech sensing performance of speech-based applications operated over wireless sensor networks. The proposed method is based on nonnegative matrix factorization (NMF), which consists of adaptive noise sensing and noise reduction. In other words, adaptive noise sensing is performed by adapting a priori noise basis matrix of the NMF, which is estimated from the noise signal, resulting in an adapted noise basis matrix. Subsequently, the adapted noise basis matrix is used for the NMF decomposition of noisy speech into clean speech and background noise. The estimated clean speech signal is then applied to a front-end of the speech-based applications. The performance of the proposed NMF-based noise sensing and reduction method is first evaluated by measuring the source to distortion ratio (SDR), the source to interferences ratio (SIR), and the source to artifacts ratio (SAR). In addition, the proposed method is applied to an automatic speech recognition (ASR) system, which is a typical speech-based application, and then the average word error rate (WER) of the ASR is compared with that employing either a Wiener filter, or a conventional NMF-based noise reduction method using only a priori noise basis matrix. <\/jats:p>","DOI":"10.1155\/2014\/640915","type":"journal-article","created":{"date-parts":[[2014,4,6]],"date-time":"2014-04-06T21:04:28Z","timestamp":1396818268000},"page":"640915","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":3,"title":["Nonnegative Matrix Factorization Based Adaptive Noise Sensing over Wireless Sensor Networks"],"prefix":"10.1177","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2810-3063","authenticated-orcid":false,"given":"Kwang Myung","family":"Jeon","sequence":"first","affiliation":[{"name":"School of Information and Communications, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 500-712, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0105-6693","authenticated-orcid":false,"given":"Hong Kook","family":"Kim","sequence":"additional","affiliation":[{"name":"School of Information and Communications, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 500-712, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sung Joo","family":"Lee","sequence":"additional","affiliation":[{"name":"Speech\/Language Information Research Center, Electronics and Telecommunications Research Institute (ETRI), 138 Gajeonggno, Yuseong-gu, Daejeon 305-700, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yun Keun","family":"Lee","sequence":"additional","affiliation":[{"name":"Speech\/Language Information Research Center, Electronics and Telecommunications Research Institute (ETRI), 138 Gajeonggno, Yuseong-gu, Daejeon 305-700, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2014,4,6]]},"reference":[{"first-page":"2273","volume-title":"Proceedings of the 12th Annual Conference of the International Speech Communication Association (INTERSPEECH \u203211)","author":"Lecouteux B.","key":"B1-2014-640915"},{"key":"B4-2014-640915","doi-asserted-by":"publisher","DOI":"10.1155\/2012\/854325"},{"issue":"2","key":"B2-2014-640915","first-page":"1","volume":"4","author":"Chandak M. 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