1
Robert W Schumann, Siu Leong Iu, Kobad Bugwadia, Guillaume Mercier, Shiva Ramadoss, Michael Bergeron, Jack Ehrhardt: System and methodology for tracing to a source of unauthorized copying of prerecorded proprietary material, such as movies. Digital Video Express, McDermott Will & Emery, September 4, 2001: US06285774 (198 worldwide citation)

To enable the source of an unauthorized copy of an information-bearing medium, such as a video DVD, to be traced, a compressed digital signal stream to be stored on the medium is altered to include “running marks,” that comprise pixel blocks changing in position frame by frame and encoded with infor ...


2
David William Kravitz, David Moshe Goldshlag: Hierarchical key management encoding and decoding. Digital Video Express, David G Grossman, June 14, 2005: US06907127 (150 worldwide citation)

The present invention discloses a construction for key management module functionality which provides for secure encoding and decoding of messages which are up to two blocks long. A method for generating an encoded value having a first encoded value part and a second encoded value part from an unenc ...


3
Robert Wilhelm Schumann, Richard Whittemore, David Mosche Goldschlag, David William Kravitz, Siu Leong Iu, Guillaume Mercier, Michael Bergeron, Jack Ehrhardt, Richard Vitkus: Digital content distribution system and method. Digital Video Express, David G Grossman, January 9, 2007: US07162642 (127 worldwide citation)

A content distribution system and method which prevents unauthorized access to secured content such as movies and music. The apparatus includes a source, a receiver, an authorized security device such as a conditional access module (CAM) for decrypting authorized content, an output device for output ...


4
Joseph Eugene Oren, Robert W Schumann, Lisa S Walko, Kevin S McQueen: System and method for movie transaction processing. Digital Video Express, Paul Derinsky, McDermott Will & Emery, May 29, 2001: US06240401 (118 worldwide citation)

A system and method for tracking and processing transactions for such purposes as creating billing record and detecting possible fraudulent activities. The system and method relates to processing transactions associated with viewing movies, e.g. a video content distributed digitally on a digital vid ...


5
Guillaume Mercier: High definition media storage structure and playback mechanism. Digital Video Express, David G Grossman, March 8, 2005: US06865747 (84 worldwide citation)

An apparatus and method for storing and playing high definition content is disclosed. This invention provides a mechanism for storing and playing back high definition content on a medium such as DVD optical disc. One aspect of the invention is that elementary streams may be multiplexed and processed ...


6
Siu Leong Iu, Wai Chu: Secure oblivious watermarking using key-dependent mapping functions. Digital Video Express, David G Grossman, May 31, 2005: US06901514 (49 worldwide citation)

A method for embedding a watermark into content is disclosed. The content contains content samples. The method including the steps of: receiving the content, creating a continuous watermark sequence from the watermark, and for each content sample in a first predetermined order: calculating a sample ...


7
David Moshe Goldshlag, David William Kravitz: Manufacturing trusted devices. Digital Video Express, David G Grossman, October 18, 2005: US06957344 (47 worldwide citation)

The present invention discloses a method and apparatus for manufacturing trusted devices. A licensing authority provides keying information to a multitude of manufactures that insert the keying information into trusted devices. The trusted devices generate final private and public keys using the key ...


8
Siu Leong Iu, Yun Ting Lin: Motion field modeling and estimation using motion transform. Digital Video Express, David G Grossman, December 2, 2003: US06658059 (45 worldwide citation)

A motion transform is implemented for calculating the motion field between two images. An optical flow calculator is configured for generating an image motion vector field by iteratively comparing a predicted image with a second image frame, the predicted image being produced based upon a first memo ...


9
Robert W Schumann, Michael Bergeron, Jo Janet Mikula, Jack Ehrhardt, Mark O Harrison Sr: Compressed video graphics system and methodology. Digital Video Express, Paul Devinsky, McDermott Will & Emery, June 20, 2000: US06078328 (44 worldwide citation)

Graphics in the same compressed digital format as that of a target video image are combined, on the fly, by an application. Combination is performed by frame modification or overlay techniques. In the preferred embodiment, the compressed video image format conforms to an MPEG-2 compression standard. ...


10
David W Kravitz, David M Goldschlag: Conditional access via secure logging with simplified key management. Digital Video Express, McDermott Will & Emery, May 18, 2004: US06738905 (42 worldwide citation)

A method and apparatus for distributing content data from a content provider to a subscriber. The method includes encrypting content data by the content provider and providing the content data from the content provider to a broadcaster. The content provider also provides a content descriptor, includ ...



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