Yoshinobu Kajikawa

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APSIPA Transactions on Signal and Information Processing / Volume 1 / December 2012 / e3 DOI: 10.1017/ATSIP.2012.4, Published online: 28 August 2012 Link to this article: http://journals.cambridge.org/abstract_S2048770312000042 How to cite this article: Yoshinobu Kajikawa, Woon-Seng Gan and Sen M. Kuo (2012). Recent advances on active noise control: open(More)
In this paper, we propose a frequency domain active noise control (ANC) system without a secondary path model. The proposed system is based on the frequency domain simultaneous perturbation (FDSP) method with variable perturbation. In this system, the coefficients of the adaptive filter are updated only by error signals. The conventional ANC system using(More)
Recently, magnetic resonance imaging (MRI) devices are used in many medical institutions on the grounds of safety and convenience. An open-configuration MR system is introduced at Shiga University of Medical Science in order to conduct microwave coagulation therapy by using near-real-time MR images. However, this system has a fatal defect. When MRI device(More)
Acoustic noise problems become more and more serious with increasing use of industrial and medical equipment, appliances, and consumer electronics. Active noise control (ANC) has been studied to solve such acoustic noise problems. ANC is a technique based on the principle of superposition, i.e., an antinoise with the same amplitude and opposite phase is(More)
In this paper, we propose a low complexity realization for linearization of loudspeaker systems. Linearization of loudspeaker system is generally realized by a Volterra filter. However, Volterra filter has a problem of requiring a huge computational complexity. The Simplified Volterra Filter (SVF), which removes the lines along the main diagonal of the(More)
In this paper, we propose a frequency domain active noise control (ANC) system without a secondary path model. The proposed system is based on the frequency domain simultaneous perturbation (FDSP) method we have proposed. In this system, the coefficients of the adaptive filter are updated only by error signals. The conventional ANC system using the(More)
In this paper, we propose an acoustic echo cancellation (AEC) using a sub-adaptive filter. In the AEC, the step-size parameter of the adaptive filter must be varied according to the situations where a double talk and an echo path change occur. The proposed AEC can appropriately control the step-size parameter even if the double talk and the echo path change(More)