Ryouichi NISHIMURA


Robust Watermarking Based on Time-spread Echo Method with Subband Decomposition
Byeong-Seob KO Ryouichi NISHIMURA Yoiti SUZUKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/06/01
Vol. E87-A  No. 6  pp. 1647-1650
Type of Manuscript:  LETTER
Category: Information Security
Keyword: 
digital audio watermarkingtime-spread echosubband decompositionsignal to mask ratio
 Summary | Full Text:PDF(383KB)

A Speech Enhancement Technique Using Kalman Filter with State Vector of Time-Frequency Patterns
Ryouichi NISHIMURA Futoshi ASANO Yoiti SUZUKI Toshio SONE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/04/01
Vol. E84-A  No. 4  pp. 1027-1033
Type of Manuscript:  Special Section PAPER (Special Section on Acoustic Signal Processing)
Category: 
Keyword: 
speech enhancementKalman filterwavelet transformtime-frequency pattern
 Summary | Full Text:PDF(402.6KB)

New Design Method of a Binaural Microphone Array Using Multiple Constraints
Yoiti SUZUKI Shinji TSUKUI Futoshi ASANO Ryouichi NISHIMURA Toshio SONE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/04/25
Vol. E82-A  No. 4  pp. 588-596
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Signal Processing Techniques for Analysis of Acoustical and Vibrational Signals)
Category: 
Keyword: 
adaptive beamformingbinauralconstraintmicrophone arraymultiple constraintsadaptive signal processing
 Summary | Full Text:PDF(494.1KB)