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The Importance of National Identity in Social Studies Classes in Puerto Rico: An Examination of Teacher and Student Perceptions of "Lo Nacional"
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Sobre el origen de algunos adjetivos considerados parasintéticos
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Pena, Jesús. - : Universidade da Coruña, Servizo de Publicacións, 2014
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The synergy between bounded-distance HMM and spectral subtraction for robust speech recognition
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Abstract:
Additive noise generates important losses in automatic speech recognition systems. In this paper, we show that one of the causes contributing to these losses is the fact that conventional recognisers take into consideration feature values that are outliers. The method that we call bounded-distance HMM is a suitable method to avoid that outliers contribute to the recogniser decision. However, this method just deals with outliers, leaving the remaining features unaltered. In contrast, spectral subtraction is able to correct all the features at the expense of introducing some artifacts that, as shown in the paper, cause a larger number of outliers. As a result, we find that bounded-distance HMM and spectral subtraction complement each other well. A comprehensive experimental evaluation was conducted, considering several well-known ASR tasks (of different complexities) and numerous noise types and SNRs. The achieved results show that the suggested combination generally outperforms both the bounded-distance HMM and spectral subtraction individually. Furthermore, the obtained improvements, especially for low and medium SNRs, are larger than the sum of the improvements individually obtained by bounded-distance HMM and spectral subtraction. ; Publicado
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Keyword:
Acoustic backing-off; Bounded-distance HMM; Missing features; Outliers; Robust speech recognition; Spectral subtraction; Telecomunicaciones
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URL: https://doi.org/10.1016/j.specom.2009.09.002 http://hdl.handle.net/10016/9045
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The Synergy between Bounded-Distance HMM and Spectral Subtraction for Robust Speech Recognition
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In: ISSN: 0167-6393 ; EISSN: 1872-7182 ; Speech Communication ; https://hal.archives-ouvertes.fr/hal-00592583 ; Speech Communication, Elsevier : North-Holland, 2009, 52 (2), pp.123. ⟨10.1016/j.specom.2009.09.002⟩ (2009)
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MORPHOLOGICAL CHANGE WITHIN DERIVATIONAL SERIES ; EL CAMBIO MORFOLÓGICO EN EL INTERIOR DE LAS SERIES DE DERIVACIÓN
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In: Journal of Linguistic Research; Vol. 11 (2008): Lexicografía y Léxico Históricos; 233-248 ; Revista de Investigación Lingüística; Vol. 11 (2008): Lexicografía y Léxico Históricos; 233-248 ; 1989-4554 ; 1139-1146 (2008)
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El cambio morfológico en el interior de las series de derivación
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Pena, Jesús. - : Murcia, Universidad de Murcia, Servicio de Publicaciones, 2008
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Band-pass filtering of the time sequences of spectral parameters for robust wireless speech recognition
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