1
Peter J Wonfor, Derek T Nelson: Method for controlling copy protection in digital video networks. Macrovision, George Almeida, Frank Nguyen, April 30, 2002: US06381747 (202 worldwide citation)

A method and system of providing copy protection of video analog and digital signals and the like, wherein the signals are transmitted via a digital delivery network, and may comprise, for example, pay per view (PPV) program materials protected by copyrights of respective program rights holders. The ...


2
John O Ryan: Method and apparatus for copy protection for various recording media. Macrovision Corporation, Gerow D Brill, April 30, 1996: US05513260 (193 worldwide citation)

A method and apparatus for copyright protection for various recording media such as compact discs (CDs) uses a combination of symmetrical and asymmetrical data encryption to permit the player to handle either copy-protected or non-copy-protected media, in a manner that is extremely difficult to comp ...


3
John O Ryan: Copy protection for hybrid digital video tape recording and unprotected source material. Macrovision Corporation, Skjerven Morrill MacPherson Franklin & Friel, May 24, 1994: US05315448 (174 worldwide citation)

A hybrid digital/analog video recorder prevents both analog and digital copying. The recorder (including a digital tape deck) inputs and outputs both analog and digital video signals. At the analog input, a detector detects conventional copy protection in the analog input video, and in response disa ...


4
John O Ryan: Radio receiver for information dissemenation using subcarrier. Macrovision Corporation, Norman R Klivans Jr, Gerow D Brill, Skjerven Morrill MacPherson Franklin & Friel, April 11, 1995: US05406626 (153 worldwide citation)

A radio receiver receives FM subcarrier transmissions, and stores the transmitted textual information in a random access memory. The information is typically news, weather, sports, entertainment or other information of interest. A user interface allows selection from the memory of the stored informa ...


5
Gregory C Copeland, John O Ryan: Method and apparatus for copy protection for various recording media using a video finger print. Macrovision Corporation, Gerow Brill, August 19, 1997: US05659613 (111 worldwide citation)

A method and apparatus for copyright protection for various recording media such as Digital Video Discs (DVDs) uses a combination of a Video Finger Print Signal and an Authenticating Signature to permit the player to handle either copy-protected or non-copy-protected media, in a manner that is diffi ...


6
John O Ryan: Method and apparatus for processing a video signal so as to prohibit the making of acceptable video tape recordings thereof. Macrovision, C Michael Zimmerman, December 23, 1986: US04631603 (105 worldwide citation)

A video signal is modified so that a television receiver will still provide a normal color picture from the modified video signal while a videotape recording of the modified video signal produces generally unacceptable pictures. This invention relies on the fact that typical videocassette recorder a ...


7
Kordian Kurowski: Method and apparatus for selective block processing. Macrovision Corporation, George Almeida, April 22, 2003: US06553127 (94 worldwide citation)

Methods, devices and systems for embedding and detecting a watermark in a data stream, such as a video stream. A texture criterion is evaluated for each block of the data stream. The texture criterion measures a variation of selected characteristics associated with each element of the data stream, s ...


8
John O Ryan, E Fraser Morrison, Gregory C Copeland: Video media security and tracking system. Macrovision, Gerow D Brill, May 19, 1998: US05754649 (89 worldwide citation)

A video disc designed for providing security and tracking data in the rental video media market. Those new formats for video players and media allow for inclusion of security features which both allow tracking of rental of such media and prevent unauthorized rental thereof Each player includes a dec ...


9
William J Wrobleski: Method and system for preventing the off screen copying of a video or film presentation. Macrovision Corporation, Gerow D Brill, January 25, 2000: US06018374 (72 worldwide citation)

A method and system for preventing a visible video copy being made of a projected image on a screen. In a theater environment, an image is projected upon a screen by a film projector or a video projector. A form of film piracy is accomplished by copying the image on the screen with a video camcorder ...


10
Gregory C Copeland: Apparatus for inserting blanked formatted fingerprint data (source ID, time/date) in to a video signal. Macrovision Corporation, Gerow D Brill, April 14, 1998: US05739864 (69 worldwide citation)

A method and apparatus for inserting source identification data into a video signal prior to its transmission, recording or display. The source identification data (Finger Print) is injected into the active picture area of a video signal without disturbing the viewing of the video signal and the dat ...