Robust vocabulary recognition clustering model using an average estimator least mean square filter in noisy environments
- Authors
- Ahn, Chan-Shik; Oh, Sang-Yeob
- Issue Date
- Aug-2014
- Publisher
- SPRINGER LONDON LTD
- Keywords
- AELMS filter; Clustering model; Noise estimation; Gaussian state model
- Citation
- PERSONAL AND UBIQUITOUS COMPUTING, v.18, no.6, pp.1295 - 1301
- Journal Title
- PERSONAL AND UBIQUITOUS COMPUTING
- Volume
- 18
- Number
- 6
- Start Page
- 1295
- End Page
- 1301
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/12435
- DOI
- 10.1007/s00779-013-0732-5
- ISSN
- 1617-4909
- Abstract
- Noise estimation and detection algorithms must adapt to a changing environment quickly, so they use a least mean square (LMS) filter. However, there is a downside. An LMS filter is very low, and it consequently lowers speech recognition rates. In order to overcome such a weak point, we propose a method to establish a robust speech recognition clustering model for noisy environments. Since this proposed method allows the cancelation of noise with an average estimator least mean square (AELMS) filter in a noisy environment, a robust speech recognition clustering model can be established. With the AELMS filter, which can preserve source features of speech and decrease the degradation of speech information, noise in a contaminated speech signal gets canceled, and a Gaussian state model is clustered as a method to make noise more robust. By composing a Gaussian clustering model, which is a robust speech recognition clustering model, in a noisy environment, recognition performance was evaluated. The study shows that the signal-to-noise ratio of speech, which was improved by canceling environment noise that kept changing, was enhanced by 2.8 dB on average, and recognition rate improved by 4.1 %.
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Collections - IT융합대학 > 컴퓨터공학과 > 1. Journal Articles
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