Title:
APPARATUS FOR ELECTRONIC WATERMARK EMBEDDING PROCESS, METHOD FOR EMBEDDING ELECTRONIC WATERMARK, AND PROGRAM
Document Type and Number:
Japanese Patent JP3861624
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To constitute an embedding process of an electronic watermark which is made difficult to recognize based on the motion information of motion images in electronic watermark embedding.
SOLUTION: Motion detection on an inputted timely continuous digital video signal is conducted by using a frame correlation. Based on the detected motion information, when an image is moving at such a speed that human eyes cannot recognize a still pattern, the electronic watermark is kept still, and when the image is moving at such a speed that human eyes can recognize a still pattern, the electronic watermark is also moved following the image. Thereby, the electronic watermark can be superimposed on the inputted digital video signal highly efficiently by adaptively reducing the calculation quantity.
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Inventors:
Yuki Matsumura
Osamu Nakamura
Shunichi Soma
Takashi Kobashi
Osamu Nakamura
Shunichi Soma
Takashi Kobashi
Application Number:
JP2001169110A
Publication Date:
December 20, 2006
Filing Date:
June 05, 2001
Export Citation:
Assignee:
ソニー株式会社
International Classes:
H04N7/08; G06T1/00; G09C5/00; G11B20/10; H04N7/081; (IPC1-7): H04N7/08; G09C5/00; G11B20/10; H04N7/081
Domestic Patent References:
| JP11355736A |
Other References:
Shan Suthaharan, Seong-Whan Kim, S. Sathananthan, Heung-Kyu Lee, K. R. Rao,Perceptually tuned robust watermarking scheme for digital video using motion entropy masking,International Conference on Consumer Electronics, 1999,1999年 6月22日,p.104-105
Attorney, Agent or Firm:
Eiji Yamada
Masaaki Miyata
Toshio Sawada
Masaaki Miyata
Toshio Sawada
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