A novel associative memory approach to speech enhancement in a vehicular environment

Abdul Rahman, Abdul Wahab and Quek, Chai (2009) A novel associative memory approach to speech enhancement in a vehicular environment. Expert System with Application, 36 (10). pp. 12120-12130. ISSN 09574174

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Abstract

Numerous attempts have been undertaken to apply the spectral subtraction method to cancel noise perturbations but these efforts have yet to produce an algorithm that is able to adapt well to the environmental changes in the perturbations. In addition, the variants of the spectral subtraction method so far proposed in the literature would require a non-voice activity detector (NVAD), for a single microphone system, to store the perturbation. This is used as an estimate for the reference signal. Inaccuracy in the perturbation estimates causes the cleaned speech to be corrupted by musical artifacts, which is unacceptable. Post processing of signals corrupted by the musical artifacts is very costly. This paper provides an alternative approach that employs associative memory for speech enhancement. Extensive comparison is made using the soft computing approaches for noise cancellation based on associative memories. A set of stereo microphones captures the corrupted speech in a vehicle and is used to point to the closest associative memory location. The Wiener filter approach is used to cancel the noise. The paper discusses novel examples of the associative memories using the cerebellum model for noise modeling. Experimental results show the potential of these novel soft computing architectures in generating and adapting the required Weiner filters to cancel perturbation even at signal to noise ratio (SNR) of less than -13 dB.

Item Type:	Article (Journal)
Additional Information:	6145/9582
Uncontrolled Keywords:	Amplitude spectral subtraction; Cerebellar model articulation controller (CMAC); Neural association noise cancellation; Weiner filter
Subjects:	Q Science > QA Mathematics > QA75 Electronic computers. Computer science T Technology > T Technology (General) > T55.4 Industrial engineering.Management engineering. > T58.5 Information technology
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Information and Communication Technology > Department of Information System Kulliyyah of Information and Communication Technology > Department of Information System
Depositing User:	Prof Abdul Wahab Abdul Rahman
Date Deposited:	09 Feb 2012 10:20
Last Modified:	14 Sep 2013 22:42
URI:	http://irep.iium.edu.my/id/eprint/9582

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