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公开(公告)号：CA2230071A1
公开(公告)日：1997-12-24
申请号：CA2230071
申请日：1997-02-13
Applicant: IBM
Inventor： KOBAYASHI MEI , SHIMIZU SHUICHI , MORIMOTO NORISHIGE , NUMAO MASAYUKI
Abstract: A data hiding method for hiding message data in media data and a data extracting method for extracting message data hidden in the media data. In the data hiding method, the message data are dispersedly hidden in the media data so that no third person can alter the message data. Specifically, the array elements of a message array are dispersedly hidden in a media array based on a status value S designating a specific array element in the media array when the media data and message data are expressed as the media array and the message array, respectively. The hiding method includes (a) a step of determining the j-th (j0) status value Sj, (b) a step of determining the (j+1)th status value Sj+1 based on the value Sj, the array element of the media array designated by the value Sj and the above-mentioned array element of the message array, and (c) a step of hiding data to be hidden in the array element of the media array designated by the value Sj+1.
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公开(公告)号：DE112012004728T5
公开(公告)日：2014-07-24
申请号：DE112012004728
申请日：2012-11-08
Applicant: IBM
Inventor： MURASE MASANA , ZHANG GANG , SHIMIZU SHUICHI
IPC: G06F11/28
Abstract: Aufgabe Bereitstellen eines Verfahrens zum Erhöhen der Geschwindigkeit des parallelen Ausführens von Logikprozessen ohne Verringerung der Genauigkeit bei der Datenaktualisierungszeitgebung in einem System zur parallelen diskreten Simulation. Lösung Ein Logikprozess mit einer längeren Verzögerung der Empfangszeit als die der Sendezeit wird um eine Menge an anfänglicher Verschiebung während eines vorab festgelegten Zeitraums vor Start der gesamten Simulation ausgeführt. Es wird bevorzugt, die anfängliche Verschiebung auf die Hälfte eines Wertes einer Differenz zwischen der Empfangszeitverzögerung und der Sendezeitverzögerung einzustellen. Der Logikprozess, der ausgeführt wird, indem die Zeitgebung um die Menge der anfänglichen Verschiebung für den vorab festgelegten Zeitraum verlagert wird, wird ausgeführt, indem Null-Mitteilungen miteinander ausgetauscht werden. Jede Null-Mitteilung wird an einen entsprechenden Logikprozess nach der vorab festgelegten Zeitverzögerung übergeben, und jeder Logikprozess sendet des Weiteren dem entsprechenden Logikprozess eine Null-Mitteilung bei Erhalt der Null-Mitteilung. Dementsprechend besteht eine Progression der Simulation, indem sie über die Null-Mitteilungen synchronisiert werden.
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公开(公告)号：GB2486136B
公开(公告)日：2012-12-26
申请号：GB201205094
申请日：2010-10-08
Applicant: IBM
Inventor： SHIMIZU SHUICHI , KOMATSU HIDEAKI , KAJITANI KOHICHI
IPC: G06F11/28
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公开(公告)号：CA2224019C
公开(公告)日：2005-01-11
申请号：CA2224019
申请日：1997-12-05
Applicant: IBM
Inventor： KOIDE AKIO , SHIMIZU SHUICHI , KOBAYASHI SEIJI , MORIMOTO NORISHIGE
Abstract: It is intended to make it possible to properly certify who is a genuine owne r, and to inhibit deterioration of image quality of media information to which the embedding operation is performed by adaptively determining amount of the operation for characterist ic values such as pixel values. The invention provides a data hiding method for embedding message data into media data comprising the steps of obtaining a secondary key by inputti ng a key having a predetermined value to a specified function; determining hiding positions in which the message data will be embedded according to the obtained secondary key, a nd selecting one of plural hiding functions according to the secondary key so that the selected hiding function is used for each of the determined hiding positions; and embedding the message data into each of the determined hiding positions according to the selected hiding function corresponding to the hiding position.
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公开(公告)号：AU2003242053A1
公开(公告)日：2003-12-22
申请号：AU2003242053
申请日：2003-06-04
Applicant: IBM
Inventor： SHIMIZU SHUICHI , NAKAMURA TAIGA
Abstract: The digital contents distribution system of the present invention distributes digital contents through first and second networks 12 and 22. A server 14 is connected to the first network 12, and clients 20 for receiving and displaying or reproducing the digital contents are connected to the second network 22. The server 14 divides digital contents held therein into a plurality of packets, and transmits packets of a minimum unit for constructing the digital contents to the second network 22. The clients 20 include means for holding the digital contents therein by use of the packets of the minimum unit received from the server 14 and packets received from other clients constructing the second network.
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Patent Agency Ranking
公开(公告)号：GB2335816B
公开(公告)日：2002-06-19
申请号：GB9904340
申请日：1999-02-26
Applicant: IBM
Inventor： SHIMIZU SHUICHI , KOIDE AKIO
Abstract: To provide an electronic watermark method and system for which the detection reliability of embedded information does not depend on the strength of signals that are measured in frames. To achieve the above object, information is prepared for embedding as a bit stream, the sign of the bit stream being changed in accordance with a sign inversion cycle, and the bit stream being embedded in a frame. As for detection of information, values obtained through observation of frames are accumulated, and the accumulated values are compared with threshold values that are varied in accordance with the accumulated values obtained by observation. The comparison results are then employed to detect the embedded information.
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公开(公告)号：HU0105014A2
公开(公告)日：2002-04-29
申请号：HU0105014
申请日：1998-11-25
Applicant: IBM
Inventor： KAMIJO KOICHI , MORIMOTO NORISHIGE , SHIMIZU SHUICHI
Abstract: It is one object of the present invention to provide a method and system for embedding an electronic watermark directly in an MPEG stream. ÄConstitutionÜ An intra-macroblock of an I-frame or of a P or B-frame is detected in an MPEG stream, and following the detection of an intra-macroblock of the I-frame or of the P or B-frame, data for one macroblock are extracted from the MPEG stream and buffered. An embedding pattern is embedded in the buffered macroblock without changing the length of VLC, and the resultant macroblock is returned to the MPEG stream. More specifically, a DC factor is extracted from the buffered macroblock, and a pseudorandom number is generated to produce an embedding pattern. Then, whether the bit length of the DC factor will not be changed by embedding the obtained embedded pattern is determined. When the bit length of the DC factor not be changed, the embedding pattern is embedded in the buffered macroblock. When the bit length will be changed, whether 1/2 of the embedding pattern can be embedded is determined. If possible, 1/2 of the embedded pattern is embedded in the macroblock.
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公开(公告)号：GB2349536A
公开(公告)日：2000-11-01
申请号：GB0003543
申请日：2000-02-17
Applicant: IBM
Inventor： SHIMIZU SHUICHI , KOIDE AKIO
Abstract: The invention an electronic watermark method and system for which the detection reliability of embedded information does not depend on the strength of signals that are measured in frames. Information is prepared for embedding as a bit stream, the sign of the bit stream being changed in accordance with a sign inversion cycle, and the bit stream being embedded in a frame. As for detection of information, values obtained through observation of frames are accumulated, and the accumulated values are compared with threshold values that are varied in accordance with the accumulated values obtained by observation. The comparison results are then employed to detect the embedded information.
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公开(公告)号：GB2343818A
公开(公告)日：2000-05-17
申请号：GB9922676
申请日：1999-09-27
Applicant: IBM
Inventor： KOBAYASHI SEIJI , CHEN DEAN D , OHSHIMA YOSHIAKI , SHIMIZU SHUICHI , MORIMOTO NORISHIGE
IPC: G09C5/00 , G10K15/02 , G10L11/00 , G10L19/00 , G10L21/04 , G11B15/05 , G11B19/04 , G11B20/00 , G11B20/10 , G11B27/036 , H04H20/00 , H04H20/31 , H04N1/32 , H04H1/00
Abstract: Additional information (eg copyright information) is embedded into audio data such that the sonic modification caused by the embedding is not perceptible to humans, whilst the additional information can be precisely recovered after audio processing. For embedding the audio data is transformed into frequency components 120 , and for each frequency component the modification level of the audio data into which the additional information 180 can be embedded is determined 130 . A mask is generated 160/170 and used for embedding the additional information in the determined modification level 140 . The modified frequency components of the audio data are then converted back into audio data using an inverse transformation 190 . In a detector (Fig. 2) the audio data is transformed into frequency components 220 and the start point of the additional information is determined 250 . A detection mask is thence produced 270/280 and used to detect the additional information 260 from the determined start point in the transformed audio data.
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公开(公告)号：DE69319823D1
公开(公告)日：1998-08-27
申请号：DE69319823
申请日：1993-09-23
Applicant: IBM
Inventor： NUMAO MASAYUKI , MASUDA HIROSHI , SHIMIZU SHUICHI
Abstract: A method and apparatus for constructing three-dimensional solid models from two-dimensional projections (orthographic views) is provided. An image processing unit prepares a cell decomposition model from three orthographic view data, a link of individual cells C1, C2, C3, C4,... in the prepared cell decomposition model is detailed referring to lines E1, ... represented on the three orthographic views, and a solid model is constructed according to a non-conflicting cell combination.
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