Title:
電子透かし埋込装置、電子透かし検出装置、デジタル情報配布装置及び記憶媒体
Document Type and Number:
Japanese Patent JP3607521
Kind Code:
B2
Abstract:
A digital watermark embedding device by which digital data is assumed to be an embedding target and the digital watermark is embedded, has spread spectrum section to set the embedding target to be a unit spreading block which performs the spread spectrum of the spreading block in which the embedding target includes more than two adjacent basic unit of each bases which constructs the plurality of basic units, multiplies the same pseudo-random number signal is multiplied to the embedding target more than two the basic units in the unit spreading block, and perform the spread spectrum of the embedding target, and watermark embedding section to embed the digital watermark in the embedding target to which the spread spectrum is performed by the spread spectrum section.
Inventors:
Hirofumi Muratani
Application Number:
JP8026899A
Publication Date:
January 05, 2005
Filing Date:
March 24, 1999
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H04N1/387; G06K9/00; G06T1/00; G09C5/00; H04N7/08; H04N7/081; (IPC1-7): H04N1/387; G06T1/00; G09C5/00
Domestic Patent References:
| JP11032200A | ||||
| JP8044845A | ||||
| JP8079496A |
Foreign References:
| WO1999001980A1 |
Attorney, Agent or Firm:
Takehiko Suzue
Sadao Muramatsu
Atsushi Tsuboi
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Shoji Kawai
Sadao Muramatsu
Atsushi Tsuboi
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Shoji Kawai