公开(公告)号：PL332701A1

公开(公告)日：1999-09-27

申请号：PL33270197

申请日：1997-02-13

Applicant: IBM

Inventor： MORIMOTO NORISHIGE ,  MAEDA JUNJI

IPC: H04N7/08 ,  G06T1/00 ,  H04N7/00 ,  H04N7/081 ,  H04N7/16

Abstract: An objective of the present invention is to provide a method for embedding additional information into a video movie without substantially having an influence on the compression efficiency of the video movie and also without substantially causing degradation of the picture quality. ÄCONSTITUTIONÜ Specify at least one embedding region in the frame of the video movie for embedding information, and determine a type of interframe prediction of the embedding region in correspondence with information to be embedded by referring to an embedding rule where a content of data to be embedded is caused to correspond to the type of interframe prediction of the embedding region. It is desirable that the frame in which the embedding region exists is a bidirectionally predictive-coded frame.

公开(公告)号：CZ9901289A3

公开(公告)日：1999-08-11

申请号：CZ128999

申请日：1997-02-13

Applicant: IBM

Inventor： MORIMOTO NORISHIGE ,  MAEDA JUNJI

IPC: H04N7/08 ,  G06T1/00 ,  H04N7/00 ,  H04N7/081 ,  H04N7/16

CPC classification number: G06T1/0085 ,  H04N19/00 ,  H04N19/467 ,  H04N21/23892 ,  H04N21/8358

公开(公告)号：CA2264625A1

公开(公告)日：1998-04-23

申请号：CA2264625

申请日：1997-02-13

Applicant: IBM

Inventor： MORIMOTO NORISHIGE ,  MAEDA JUNJI

IPC: H04N7/08 ,  G06T1/00 ,  H04N7/00 ,  H04N7/081 ,  H04N7/16 ,  H04N5/76 ,  G11B23/00

Abstract: A method of hiding message information in media information in a frequency space. A high resistance to removal and alteration of hidden message is given. Even when signal processing is executed by using a frequency filter, the hidden message information is continuously maintained effectively. The frequency spectra (f1 and f2) of the medium information (M) and message information (m) are found by frequency-converting the information (m) and the information (M) in order to hide the message information (m) in media information (M). Then an area containing a characteristic frequency component indicating the feature of the message information (m) in a real space is extracted from the frequency spectrum (f2) of the message information (m) as a basic area (B). Then a frequency spectrum (f3) is generated as intermediate information by making n copies of the basic area (B), dispersedly arranging the copies in the frequency space and making the other frequency components zero. Lastly, the message information (m) is hidden in the medium information (M) by executing operation based on the frequency spectrum (f3) and medium information (M).