Results 211 to 220 of about 1,082 (250)

Lasso-based reverberation suppression in automatic speech Recognition

2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2015
Far-field automatic speech recognition (ASR) is challenging, mainly attributed to the high reverberation in the recordings. A novel linear sparse prediction model has been proposed to estimate and suppress reverberation. This model considers reverberation as a mixture of early and late reflections of the direct signal and estimates the late reflection ...
Xuewei Zhang, Yiye Lin, Dong Wang 0013
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Space-time ODN suppressing reverberation method

2008 9th International Conference on Signal Processing, 2008
Reverberation of active sonar that resemble clutter of airborne radar has space-time coupling characteristic. Based on which, a method of space-time ODN reverberation is presented in this paper. Project matrix method is utilized to design time and space ODN filters.
null Zhan Haoke, null Cai Zhiming, null Yuan Bingcheng   +2 more
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A Hydrophone Perturbation Method for Reverberation Suppression

Journal of Information and Computational Science, 2014
Under the shallow sea condition, bottom reverberation is the main background noise. Especially the bottom and the buried targets echo are weak and signal-to-reverberation ratio is very low. So it is an important problem that how to improve the signal-to-reverberation ratio. This paper presents a method which is Perturbation Iteration Method. The method
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The STAP Method for Moving Sonar Reverberation Suppression

Applied Mechanics and Materials, 2015
The theory of full dimension and reduced dimension STAP was introduced. Based on the physical mechanism of reverberation formation, the suppression of moving sonar reverberation and the possibility of improvement of detection performance were analyzed and discussed, and the solutions of several key steps were given.
S.D. Zhao, Kun Yan, T.Z. Zhou
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The reverberation suppression in wideband diver detection sonar

2014 Oceans - St. John's, 2014
The reverberation suppression is the foundation of target detection in diver detection sonar. The reverberation caused by the sea bottom is generally strong. Conventional methods with only amplitude cannot remove these reverberations completely because of the random temporal fluctuation of the signal amplitude, which causes false alarms especially in ...
Yang Juan, Xu Feng, Liu Jia, An Xudong, Ji Yongqiang   +4 more
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Reverberation characterization and suppression by means of principal components

IEEE Oceanic Engineering Society. OCEANS'98. Conference Proceedings (Cat. No.98CH36259), 2002
We apply the principal component inverse (PCI) method of rapidly adaptive interference suppression to the problem of separating the strong components of reverberation in an active reverberation experiment. A best low-rank estimate of a reverberation return is extracted by decomposing the returns into short duration subintervals over which the signal is
T.A. Palka, D.W. Tufts
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Online Estimation of Reverberation Parameters For Late Residual Echo Suppression

IEEE/ACM Transactions on Audio, Speech, and Language Processing, 2020
In hands-free telephony and other distant-talk applications, often a short AEC filter is used to achieve fast convergence at low computational cost. As a result, a significant amount of late residual echo (LRE) may remain, especially in highly reverberant environments.
Naveen Kumar Desiraju, Simon Doclo, Markus Buck, Tobias Wolff   +3 more
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Reverberation characterization and suppression by means of principal components

The Journal of the Acoustical Society of America, 1994
A method of reverberation suppression and characterization, called the principal components inverse (PCI) method, has been used to separate strong components of the reverberation from the observed data of an active sonar reverberation experiment. The number of principal reverberation components needed to represent these strong components seldom exceeds
Richard R. Slater, Donald W. Tufts
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Broadband DOA Estimation by Beamforming with Suppression of Reverberation

2008 Congress on Image and Signal Processing, 2008
Acoustic signal processing in shallow water environments is a challenging problem because of the presence of reverberation. Based on some models of reverberation, data from sensors array is pretreated to suppress reverberation. Considering reverberation as a sum of echoes of transmitted signal, the principal component inverse (PCI) algorithm is ...
Xuan Li, Xiaochuan Ma, Chaohuan Hou
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Single-Microphone Early and Late Reverberation Suppression in Noisy Speech

IEEE Transactions on Audio, Speech, and Language Processing, 2013
This paper presents a single-microphone approach to the enhancement of noisy reverberant speech via inverse filtering and spectral processing. An efficient algorithm is used to blindly estimate the inverse filter of the Room Impulse Response (RIR). This filter is used to attenuate the early reverberation.
Saeed Mosayyebpour, Morteza Esmaeili, T. Aaron Gulliver   +2 more
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