Abstract: 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 keying information. The keys may then be certified by the manufacture and verified by other devices.

Abstract: 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 in a high definition media player instead of at authoring time. Another aspect of the invention is that it provides for extended real-time features such as inserting watermarks into the content stream, decrypting selected sections of the content stream, and performing trick playback display modes.

Abstract: 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 outputting content and a backend for managing accounts and system operations. One aspect of this invention provides a mechanism for providing secured content on a medium such as a DVD optical disc. These devices may verify that there is authorization to play the secured content, add watermarks to the secured content, convert the secured content to a displayable form and provide a means for preventing output of the secured content.

Abstract: The present invention discloses a general-purpose hierarchical key management method and apparatus whose trusted operation, with respect to compromise of keying material, does not depend upon the controlling application. This enables designs that separate secure key management from the application-specific use of the keying material, and enables the rigorous evaluation of the key management module.

Abstract: 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 keying information. The keys may then be certified by the manufacture and verified by other devices.

Abstract: A method and apparatus for preventing unauthorized use of DVDs on a DVD ROM drive. The method comprises a DVD disc that includes special data processing. When the DVD is replayed on a standard DVD ROM drive the invention causes the output of the DVD ROM drive to be erroneous, such that the computer cannot use the data. According to the invention, when encoding a disc, the error correction and/or error detection bits, check bytes, are moved into the normal or main data area. When this scrambled data is output from a standard DVD ROM drive, the data in the check byte area is lost and the information is not useable. For authorized use, this scrambling is reversed before sending video and/or audio data to the MPED decoder and AC-3 decoder respectively.

Abstract: 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 unencoded value having a first unencoded value part and a second unencoded value part, comprising the steps of: obtaining an initialization vector; and generating the first and second encoded value parts.

Abstract: 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 mean, calculating a sample variance, and normalizing the content. Further steps include generating a set of content coefficients from the content, generating a set of watermark coefficients from the watermark sequence, embedding the watermark in the content by adjusting the amplitude of the watermark coefficients so that the distortion between the content coefficients and the associated watermark coefficients are minimized using a secret mapping function, and outputting the content. The mapping functions may be controlled by a key-dependent random sequence to protect the watermarks.

Abstract: 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 in a high definition media player instead of at authoring time. Another aspect of the invention is that it provides for extended real-time features such as inserting watermarks into the content stream, decrypting selected sections of the content stream, and performing trick playback display modes.

Abstract: A method and apparatus for Disc Layout and Optimization (DLO) receives input such as a list of disc elements, a list of scene links, compiled code files, and still media files. The DLO also obtains information, e.g., from a work order, regarding the size of the target DVD disc, the number of layers on the disc, and whether the disc is a dual layer disc, the type of tracking used, i.e., parallel or opposite, etc. A scene is made up of one or more JARs, which are hierarchical. Navigation information from the scene code builder informs the DLO of the JAR types and scene flow. This allows the program to arrange the JARs and content to minimize the elapsed time between scenes. To accomplish this, a called JAR is placed within a reasonable distance of its calling JAR. If necessary, JARs will be replicated on the disc so as to keep the elapsed time as short as possible. Furthermore, replicated JARs that have no use will be deleted.

Abstract: 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, including keys to decrypt the encrypted content, to a conditional access provider. The broadcaster distributes the encrypted content information to a subscriber. A business service provider negotiates with the subscriber to deliver individual content programs or packages of content programs to the subscriber for a fee. The conditional access provider distributes a content descriptor including keys necessary to decrypt the programs the subscriber selected from the business service provider. A CAM retained by the subscriber maintains a log of programs accessed, and uploads the log to the business service provider, which is used to determine the appropriate fee which the subscriber should be charged.

Abstract: 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 memory frame and image gradients generated according to a motion estimate that is produced according to a transform function using transform coefficients. The transform coefficients are estimated based upon a previously determined image gradient.

Abstract: An apparatus for generating an image motion vector field which describes a motion of individual image components of a first image frame and corresponding image components of a second image frame in a sequence of image frames. The apparatus comprises a first frame memory for receiving said first image frame, a second frame memory for receiving a second image frame, and an optical flow calculator. The optical flow calculator is configured for generating an image motion vector field by iteratively comparing a predicted image with the second image frame. The predicted image is generated according to a current motion estimate in proximity to an observation point, wherein the observation point migrates according to a previous motion estimate and is implemented by the calculator to generate a current motion estimate.

Abstract: 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 information designating where and when the copy was made. The medium under test is played back synchronously with a reference medium containing the locations of the running marks together with original video. The source of copying message is advantageously encrypted and scrambled to avoid detection or alteration by a copyist. The message preferably is spread, for example into a spread spectrum carrier, to enhance discrimination among a large number of sources and enable demodulation in the presence of noise.

Abstract: 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 video disc (DVD) in an scrambled format, where the video content is only viewable in conjunction with the use of a specially designed and enabled player. This method of distributing and billing movie content provides an alternative to current methods such as viewing via video tapes, open format DVDs, pay-per-view, or cable service. The system and method permits a user to establish, via a single authorization, multiple access to a service during a period of time, where each event of access is not individually billed. The system and method does not create a billable charge for a user authorization if the user does not actually access the service.