Results 241 to 250 of about 432,612 (272)

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

An Improved Method for Late-Reverberant Suppression Based on Statistical Model

Speech Communication, 2013
Model-based late reverberant spectral variance (LRSV) estimator is considered as an effective approach for speech dereverberation, which can construct a simple expression for the LRSV according to the past spectral variance of the reverberant signal. In this paper, we develop a new LRSV estimator based on the time-varying room impulse responses (RIRs ...
Xulei Bao, Jie Zhu 0006
openaire   +2 more sources

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
openaire   +1 more source

Space-time processing for suppression of bottom reverberation

Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers, 2002
The major problem for sonars operating in shallow water is the detection of low Doppler targets in the presence of severe bottom reverberation. For a modern sonar with an azimuthally omni-directional transmitter; the Doppler of bottom reverberation is proportional to /spl nu/cos /spl theta/ where /spl nu/ is the speed of the sonar platform and /spl ...
openaire   +1 more source

Modeling and Suppression of Reverberation Components

IEEE Seventh SP Workshop on Statistical Signal and Array Processing, 2005
G.S. Edelson, I.P. Kirsteins
openaire   +1 more source

Underwater reverberation suppression based on non-negative matrix factorisation

Journal of Sound and Vibration, 2021
Xiukun Li
exaly  

Reverberation suppression for detecting underwater moving target based on robust autoencoder

Applied Acoustics, 2023
Yu Zhang, Zhongchang Song, Wuyi Yang
exaly