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Class Information
Number: 380/201
Name: Cryptography > Video cryptography > Copy protection or prevention
Description: Subject matter which prevents rerecording of a stored picture signal representative of a time varying object or image.










Sub-classes under this class:

Class Number Class Name Patents
380/203 Having copy protect signal 561
380/202 Having origin or program id 384
380/204 Modifying sync signal 166


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Next

Patent Number Title Of Patent Date Issued
7895442 Interconnect device to enable compliance with rights management restrictions Feb. 22, 2011
7889863 Recording device, recording medium, and content protection system Feb. 15, 2011
7889382 Image processing apparatus and control method therefor Feb. 15, 2011
7886151 Temporal synchronization of video and audio signals Feb. 8, 2011
7885895 Information processing apparatus, content information management method and computer program Feb. 8, 2011
7885602 Wireless ad hoc network security Feb. 8, 2011
7885407 Transmitting apparatus, receiving apparatus, and data transmission system Feb. 8, 2011
RE42107 Digital data file encryption apparatus and method and recording medium for recording digital data file encryption program thereon Feb. 1, 2011
RE42106 Digital data file encryption apparatus and method and recording medium for recording digital data file encryption program thereon Feb. 1, 2011
7882564 Information recording/playback apparatus and method Feb. 1, 2011
7882357 System and method of retrieving a watermark within a signal Feb. 1, 2011
7877328 Communication system communication method, contents processing device, and computer program Jan. 25, 2011
7876894 Method and system to provide security implementation for storage devices Jan. 25, 2011
7874014 Content distribution server and content distribution system using the same Jan. 18, 2011
7873578 Buy once play anywhere Jan. 18, 2011
7873237 Degrading 3D information Jan. 18, 2011
7873162 Reproducing method, reproducing apparatus, recording method, and recording apparatus Jan. 18, 2011
7870075 System and method for managing software development Jan. 11, 2011
7869602 User-based digital rights management Jan. 11, 2011
7869595 Content copying device and content copying method Jan. 11, 2011
7869594 Digital broadcasting receiving system and digital broadcasting receiving device Jan. 11, 2011
7868899 3-D graphics texturing system using encrypted textures Jan. 11, 2011
7865960 Digital literary work protection system and digital literary work protection method Jan. 4, 2011
7865057 Method and apparatus for conveying rights across an analog video interface Jan. 4, 2011
7865034 Image display methods and systems with sub-frame intensity compensation Jan. 4, 2011
7864759 Synchronization of secured audiovisual streams Jan. 4, 2011
7861312 MP3 player with digital rights management Dec. 28, 2010
7861306 Method and system for limiting the use of user-specific software features Dec. 28, 2010
7860809 Methods and devices for digital media distribution Dec. 28, 2010
7860799 Methods, systems, and computer program products for providing media content delivery audit and verification services Dec. 28, 2010
7856560 Digital information recording apparatus and recording/reproducing apparatus Dec. 21, 2010
7856168 Recorder/reproducer and content data protection system for preventing unauthorized use of content Dec. 21, 2010
7854011 Method of managing digital rights Dec. 14, 2010
7853802 Information processing system, method, and apparatus, and program Dec. 14, 2010
7853121 Recording medium, reproduction device, program, and reproduction method Dec. 14, 2010
7852853 System and method for transmitting video information Dec. 14, 2010
7849323 Password presentation for multimedia devices Dec. 7, 2010
7849019 Method and arrangement for managing licenses Dec. 7, 2010
7848520 Partial encryption storage medium Dec. 7, 2010
7845011 Data transfer system and data transfer method Nov. 30, 2010
7844822 Temporally threaded CMI watermark Nov. 30, 2010
7844054 Stream recording and/or reproducing apparatus and method Nov. 30, 2010
7840818 System, method, and device for playing back recorded content Nov. 23, 2010
7840489 Key sharing for DRM interoperability Nov. 23, 2010
7840487 Digital content encryption and decryption method and workflow system using digital content Nov. 23, 2010
7840006 Content distribution system and content distribution method Nov. 23, 2010
7840005 Synchronization of media signals Nov. 23, 2010
7839998 Transcoding CableCARD Nov. 23, 2010
RE41942 Digital data file encryption apparatus and method and recording medium for recording digital data file encryption program thereon Nov. 16, 2010
7831832 Digital goods representation based upon matrix invariances Nov. 9, 2010

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