NDLI: Filter-bank optimization for Frequency Domain Linear Prediction

Content Provider	IEEE Xplore Digital Library
Author	Peddinti, V. Hermansky, H.
Copyright Year	2013
Description	Author affiliation: Center for Language & Speech Process., Johns Hopkins Univ., Baltimore, MD, USA (Peddinti, V.; Hermansky, H.)
Abstract	The sub-band Frequency Domain Linear Prediction (FDLP) technique estimates autoregressive models of Hilbert envelopes of subband signals, from segments of discrete cosine transform (DCT) of a speech signal, using windows. Shapes of the windows and their positions on the cosine transform of the signal determine implied filtering of the signal. Thus, the choices of shape, position and number of these windows can be critical for the performance of the FDLP technique. So far, we have used Gaussian or rectangular windows. In this paper asymmetric cochlear-like filters are being studied. Further, a frequency differentiation operation, that introduces an additional set of parameters describing local spectral slope in each frequency sub-band, is introduced to increase the robustness of sub-band envelopes in noise. The performance gains achieved by these changes are reported in a variety of additive noise conditions, with an average relative improvement of 8.04% in phoneme recognition accuracy.
Starting Page	7102
Ending Page	7106
File Size	459760
Page Count	5
File Format	PDF
ISBN	9781479903566
ISSN	15206149
DOI	10.1109/ICASSP.2013.6639040
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-05-26
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Speech Noise Discrete cosine transforms Speech recognition Accuracy Speech processing Robustness robust speech recognition cochlear filters spectral differentiation
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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