Results 91 to 100 of about 123,247 (141)

Detection and Separation of Speech Event Using Audio and Video Information Fusion and Its Application to Robust Speech Interface

EURASIP Journal on Advances in Signal Processing, 2004
A method of detecting speech events in a multiple-sound-source condition using audio and video information is proposed. For detecting speech events, sound localization using a microphone array and human tracking by stereo vision is combined by a Bayesian
Futoshi Asano, Kiyoshi Yamamoto, Isao Hara, Jun Ogata, Takashi Yoshimura, Yoichi Motomura, Naoyuki Ichimura, Hideki Asoh   +7 more
doaj   +1 more source

Hearing Aid Speech Enhancement Using Phase Difference-Controlled Dual-Microphone Generalized Sidelobe Canceller

IEEE Access, 2019
This paper proposes a new technique for improving a generalized sidelobe canceller (GSC) for dual-microphone speech enhancement to be applied in an auditory device such as a hearing aid.
Seon Man Kim
doaj   +1 more source

Adaptive and Compressive Beamforming Using Deep Learning for Medical Ultrasound [PDF]

arXiv, 2019
In ultrasound (US) imaging, various types of adaptive beamforming techniques have been investigated to improve the resolution and contrast-to-noise ratio of the delay and sum (DAS) beamformers. Unfortunately, the performance of these adaptive beamforming approaches degrade when the underlying model is not sufficiently accurate and the number of ...
arxiv  

Switchable deep beamformer for high-quality and real-time passive acoustic mapping [PDF]

arXiv
Passive acoustic mapping (PAM) is a promising tool for monitoring acoustic cavitation activities in the applications of ultrasound therapy. Data-adaptive beamformers for PAM have better image quality compared to the time exposure acoustics (TEA) algorithms. However, the computational cost of data-adaptive beamformers is considerably expensive.
arxiv  

Online Adaptive Real-Time Beamforming Design for Dynamic Environments in Cell-Free Systems [PDF]

arXiv
In this paper, we consider real-time beamforming design for dynamic wireless environments with varying channels and different numbers of access points (APs) and users in cell-free systems. Specifically, a sum-rate maximization optimization problem is formulated for the beamforming design in dynamic wireless environments of cell-free systems.
arxiv  

Fast and robust adaptive beamforming method based on complex-valued RBF neural network

The Journal of Engineering, 2019
The adaptive beamforming is one of the key techniques for array signal processing. However, the matrix inversion operation in the existing methods will cost a large amount of computational complexity, which results in poor real-time processing ability ...
Yuqing Li, Xiaopeng Yang, Feifeng Liu
doaj   +1 more source

Robust beamforming based on the worst-case performance optimization with positive semi-definite constraints

Tongxin xuebao, 2013
For the robust adaptive beamforming problem of the gen l signal models, a robust beamforming algorithm based on the worst-case performance optimization with positive semi-definite constraints was proposed.
Ding-jie XU, Rui HE, Feng SHEN
doaj   +2 more sources

Robust Rank Reduction Algorithm with Iterative Parameter Optimization and Vector Perturbation

Algorithms, 2015
In dynamic propagation environments, beamforming algorithms may suffer from strong interference, steering vector mismatches, a low convergence speed and a high computational complexity.
Peng Li, Jiao Feng, Rodrigo C. de Lamare
doaj   +1 more source

Co-channel Interference Cancellation for Space-Time Coded OFDM Systems Using Adaptive Beamforming and Null Deepening [PDF]

Raungrong Suleesathira, "Co-channel Interference Cancellation for Space-Time Coded OFDM Systems Using Adaptive Beamforming and Null Deepening", Journal of Telecommunications, Volume 1, Issue 1, pp6-13, February 2010, 2010
Combined with space-time coding, the orthogonal frequency division multiplexing (OFDM) system explores space diversity. It is a potential scheme to offer spectral efficiency and robust high data rate transmissions over frequency-selective fading channel.
arxiv  

Tri-timescale Beamforming Design for Tri-hybrid Architectures with Reconfigurable Antennas [PDF]

arXiv
Reconfigurable antennas possess the capability to dynamically adjust their fundamental operating characteristics, thereby enhancing system adaptability and performance. To fully exploit this flexibility in modern wireless communication systems, this paper considers a novel tri-hybrid beamforming architecture, which seamlessly integrates pattern ...
arxiv