Ayuko TAKAGI


Scrambling of MPEG Video by Exchanging Motion Vectors
Ayuko TAKAGI Hitoshi KIYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/08/01
Vol. E87-A  No. 8  pp. 2054-2057
Type of Manuscript:  Special Section LETTER (Special Section on Digital Signal Processing)
Category: Image/Visual Signal Processing
Keyword: 
MPEG videoimage scramblingmotion vector
 Summary | Full Text:PDF(271.6KB)

Lossless Video Coding Using Interleaved Multiple Frames
Ayuko TAKAGI Hitoshi KIYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/06/01
Vol. E86-A  No. 6  pp. 1504-1508
Type of Manuscript:  Special Section LETTER (Special Section on Papers Selected from 2002 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2002))
Category: 
Keyword: 
JPEG2000Motion JPEG 2000lossless video codinginterleaved multiple frames
 Summary | Full Text:PDF(312.6KB)

QCIF Video Coding Based on JPEG2000 Using Symmetry of Images
Ayuko TAKAGI Hitoshi KIYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/08/01
Vol. E85-A  No. 8  pp. 1898-1901
Type of Manuscript:  Special Section LETTER (Special Section on Digital Signal Processing)
Category: Image/Visual Signal Processing
Keyword: 
JPEG2000MotionJPEG2000symmetric extensionQCIFvideo encoding
 Summary | Full Text:PDF(500.7KB)

Motion Estimation Using Edge Enhanced Low-Bit Images for Lowpower MPEG Encoder
Ayuko TAKAGI Kiyoshi NISHIKAWA Hitoshi KIYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/08/01
Vol. E84-A  No. 8  pp. 1900-1908
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: Image/Visual Signal Processing
Keyword: 
low powermotion estimationMPEGlow-bit imageedge enhancement
 Summary | Full Text:PDF(629.6KB)

Motion Estimation with Power Scalability and Its VHDL Model
Ayuko TAKAGI Shogo MURAMATSU Hitoshi KIYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/08/25
Vol. E83-A  No. 8  pp. 1608-1613
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: Implementations of Signal Processing Systems
Keyword: 
low powermotion estimationMPEGless gray level image
 Summary | Full Text:PDF(826.9KB)

A Method of Inserting Binary Data into MPEG Video in the Compressed Domain
Hitoshi KIYA Yoshihiro NOGUCHI Ayuko TAKAGI Hiroyuki KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/08/25
Vol. E82-A  No. 8  pp. 1485-1492
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
inserting binary dataMPEGdigital librarywatermarking
 Summary | Full Text:PDF(939.8KB)