{"abstract":[{"text":"In this paper, the noise estimation for model-based speech feature enhancement in automatic speech recognition (ASR) is investigated. Beside a stationary noise prior, three linear state space models for the (cepstral) noise process are considered. We have derived novel EM algorithms for the estimation of the noise model parameters: A blockwise EM algorithm is applied on noise-only input data. It is supposed to be used during the offline training mode of the recognizer. Further a sequential online EM algorithm is employed to adapt the observation variance in recognition mode which works as well under the asumption of a stationary noise prior and a linear state model for the noise. Experiments on the AURORA4 database lead to improved recognition results with the new state model compared to the assumption of stationary noise.","lang":"eng"}],"user_id":"44006","type":"journal_article","author":[{"full_name":"Windmann, Stefan","last_name":"Windmann","first_name":"Stefan"},{"id":"242","first_name":"Reinhold","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach"}],"department":[{"_id":"54"}],"title":"A novel approach to noise estimation in model-based speech feature enhancement","date_created":"2019-07-12T05:31:12Z","publication":"2008 ITG Conference on Voice Communication (SprachKommunikation)","oa":"1","_id":"11940","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2008/WiHa08-2.pdf","open_access":"1"}],"status":"public","language":[{"iso":"eng"}],"year":"2008","citation":{"ama":"Windmann S, Haeb-Umbach R. A novel approach to noise estimation in model-based speech feature enhancement. <i>2008 ITG Conference on Voice Communication (SprachKommunikation)</i>. 2008:1-4.","apa":"Windmann, S., &#38; Haeb-Umbach, R. (2008). A novel approach to noise estimation in model-based speech feature enhancement. <i>2008 ITG Conference on Voice Communication (SprachKommunikation)</i>, 1–4.","ieee":"S. Windmann and R. Haeb-Umbach, “A novel approach to noise estimation in model-based speech feature enhancement,” <i>2008 ITG Conference on Voice Communication (SprachKommunikation)</i>, pp. 1–4, 2008.","bibtex":"@article{Windmann_Haeb-Umbach_2008, title={A novel approach to noise estimation in model-based speech feature enhancement}, journal={2008 ITG Conference on Voice Communication (SprachKommunikation)}, author={Windmann, Stefan and Haeb-Umbach, Reinhold}, year={2008}, pages={1–4} }","mla":"Windmann, Stefan, and Reinhold Haeb-Umbach. “A Novel Approach to Noise Estimation in Model-Based Speech Feature Enhancement.” <i>2008 ITG Conference on Voice Communication (SprachKommunikation)</i>, 2008, pp. 1–4.","chicago":"Windmann, Stefan, and Reinhold Haeb-Umbach. “A Novel Approach to Noise Estimation in Model-Based Speech Feature Enhancement.” <i>2008 ITG Conference on Voice Communication (SprachKommunikation)</i>, 2008, 1–4.","short":"S. Windmann, R. Haeb-Umbach, 2008 ITG Conference on Voice Communication (SprachKommunikation) (2008) 1–4."},"page":"1-4","date_updated":"2022-01-06T06:51:12Z"}