| 8406311 |
System and method for embedding additional information in video data |
Koichi Kamijo, Shuichi Shimizu |
2013-03-26 |
| 8055505 |
Audio content digital watermark detection |
Ryuki Tachibana |
2011-11-08 |
| 7748051 |
Contents server, contents receiving apparatus and network system for adding information to digital contents |
Kohichi Kamijoh, Seiji Kobayashi, Masato Kurokawa |
2010-06-29 |
| 7469422 |
Contents server, contents receiving method for adding information to digital contents |
Kohichi Kamijoh, Seiji Kobayashi, Masato Kurokawa |
2008-12-23 |
| 7295615 |
System for embedding additional information in video data, and embedding method |
Koichi Kamijo, Shuichi Shimizu |
2007-11-13 |
| 7093299 |
System for authenticating digital data |
Koichi Kamijo, Akio Koide, Tohru Sakakura |
2006-08-15 |
| 6963655 |
Alteration detection apparatus and method thereof |
Satoko Tonegawa, Kohichi Kamijoh |
2005-11-08 |
| 6829367 |
Content data judging apparatus |
Kazuhara Toyokawa, Satoko Tonegawa |
2004-12-07 |
| 6782509 |
Method and system for embedding information in document |
Yuki HIRAYAMA, Tomio Amano, Shuichi Shimizu |
2004-08-24 |
| 6526385 |
System for embedding additional information in audio data |
Seiji Kobayashi, Dean Chen, Yoshiaki Ohshima, Shuichi Shimizu |
2003-02-25 |
| 6512835 |
Data hiding and extraction methods |
Masayuki Numao, Shuichi Shimizu, Mei Kobayashi |
2003-01-28 |
| 6351439 |
Method and system for managing access to data through data transformation |
Kunihiko Miwa, Hiroya Kobayashi |
2002-02-26 |
| 6286100 |
Method for hiding message data into media data and a method for extracting that hidden data |
Shu Tezuka, Syoiti Ninomiya |
2001-09-04 |
| 6249870 |
Data hiding method and data extraction method using statistical examination |
Seiji Kobayashi, Akio Koide, Shuichi Shimizu |
2001-06-19 |
| 6230268 |
Data control system |
Kunihiko Miwa, Shuichi Shimizu |
2001-05-08 |
| 6201879 |
Method and apparatus for logo hiding in images |
Walter Bender, Daniel Gruhl |
2001-03-13 |
| 6055321 |
System and method for hiding and extracting message data in multimedia data |
Masayuki Numao, Shuichi Shimizu, Mei Kobayashi |
2000-04-25 |
| 6034931 |
Method of recording media data on a storage medium and method and system for accessing the media data recorded on the storage medium |
Kunihiko Miwa, Hiroya Kobayashi |
2000-03-07 |
| 6005643 |
Data hiding and extraction methods |
Junji Maeda |
1999-12-21 |
| 6005936 |
System for embedding authentication information into an image and an image alteration detecting system |
Shuichi Shimizu, Masayuki Numao |
1999-12-21 |
| 5893067 |
Method and apparatus for echo data hiding in audio signals |
Walter Bender, Daniel Gruhl |
1999-04-06 |
| 5870499 |
Method and apparatus for data hiding in images |
Walter Bender, Daniel Gruhl |
1999-02-09 |
| 5689587 |
Method and apparatus for data hiding in images |
Walter Bender, Daniel Gruhl |
1997-11-18 |
| 5132891 |
Power supply apparatus |
Masaki Kobayashi, Masaki Mori |
1992-07-21 |
