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| Number | Title | Issue Date |
| 8184953 | Selection of hash lookup keys for efficient retrieval Videos are received and indexed based on fingerprints generated for the videos, using lookup keys which correspond to sub portions of the reference fingerprints. Specifically, a set of lookup keys is selected such that the number of reference fingerprints such that ... | 05/22/2012 |
| 8180050 | System and method for self-decaying digital media files and for validated playback of same Information, such as audio visual information, is secured by self-decay of the information over time. For instance, a date stamp and decay rate embedded in an encrypted audio or visual digital media file can be applied to decrypt the file to a predetermined decayed ... | 05/15/2012 |
| 8170209 | Extensible disc player The present invention provides an extensible disc player that is upgradeable to play new content types. The player's capability can be extended by downloading an appropriate decoder from a web server via the Internet. In this way, the player can play back contents t... | 05/01/2012 |
| 8165292 | Method and system for secure distribution of audiovisual data encapsulated according to a plurality of transport protocols Methods and systems for secure distribution of an original audiovisual stream constituted of a set of transport packets encapsulated according to a plurality of transport protocols suitable to be transmitted to a receiving device compatible with one of the said tran... | 04/24/2012 |
| 8144869 | Content protection system, key data generation apparatus, and terminal apparatus A content protection system prevents illegal key acquisition, without checking uniqueness of device keys. The content protection system includes a key data generation apparatus and a user terminal. The key data generation apparatus converts first key data, which is ... | 03/27/2012 |
| 8130952 | Methods and apparatus for persistent control and protection of content A novel method and apparatus for protection of streamed media content is disclosed. In one aspect, the apparatus includes control means for governance of content streams or content objects, decryption means for decrypting content streams or content objects under con... | 03/06/2012 |
| 8121291 | Apparatus, system, method and computer program product for distributing service information and digital rights for broadcast data An apparatus, system method and computer program product configured to transmit data over a broadcast network. The data is encrypted and decoded using a decryption key available to terminals in combination with a digital rights object. A media guide is broadcast to ... | 02/21/2012 |
| 8116452 | Content playback device To provide a content playback device capable of protecting content according to DRM, when decrypting encrypted content recorded on a recording medium and playing the decrypted content. If key generation information is “00”, a key control unit 104 concaten... | 02/14/2012 |
| 8090103 | Method of managing copy protection information of a recording medium, recording medium with copy protection information for contents recorded thereon, and reproducing method for the recording medium The present invention relates to a method of managing CPI (Copy Protection Information) for preventing unauthorized copy of encrypted content recorded on a high-density recording medium such as a BD-ROM (Blu-ray Disc ROM). In the present method, when main content da... | 01/03/2012 |
| 8090102 | Information processing device, information processing method, and computer program To provide an apparatus and method for realizing an improved content preview process in a content using mechanism based on content usage-right information. A client obtains default usage-right information (Default Usage Right) when it is registered to a license serv... | 01/03/2012 |
| RE42951 | Copy prevention method and apparatus for digital video system A copy prevention method and apparatus for a digital video system is disclosed including the steps of: (a) adding a header area of a header start code and key field to a reproduced bit stream: (b) decrypting and transmitting the bit stream to which the header area i... | 11/22/2011 |
| RE42950 | Copy prevention method and apparatus for digital video system A copy prevention method and apparatus for a digital video system is disclosed including the steps of: (a) adding a header area of a header start code and key field to a reproduced bit stream: (b) decrypting and transmitting the bit stream to which the header area i... | 11/22/2011 |
| RE42922 | Copy prevention method and apparatus for digital video system A copy prevention method and apparatus for a digital video system is disclosed including the steps of: (a) adding a header area of a header start code and key field to a reproduced bit stream: (b) decrypting and transmitting the bit stream to which the header area i... | 11/15/2011 |
| 8059815 | Transforming data files into logical storage units for auxiliary data through reversible watermarks A reversible watermarking program transforms a host data file into a logical storage unit for auxiliary data files by embedding the auxiliary files in the data stored in the host data file. The reversible watermark modifies host data such as an image, audio, video, ... | 11/15/2011 |
| RE42921 | Copy prevention method and apparatus for digital video system A copy prevention method and apparatus for a digital video system is disclosed including the steps of: (a) adding a header area of a header start code and key field to a reproduced bit stream; (b) decrypting and transmitting the bit stream to which the header area i... | 11/15/2011 |
| 8059941 | Multiplex DVD player A method for playing DVD. A method for simultaneously outputting a DVD movie to multiple channels each having its own playback parameters such as view angle, spoken language and subtitle language, using a single DVD player. ... | 11/15/2011 |
| 8041034 | Multi-streaming apparatus and multi-streaming method using temporary storage medium Disclosed are a method of multi-streaming encrypted contents stored in a storage medium to a second player during streaming the contents to a first player, and an apparatus using the same. The method includes: temporarily storing the encrypted contents streaming to ... | 10/18/2011 |
| 8023652 | Apparatus and method for implementing digital rights management systems in low-efficiency storage device A host device and a method of implementing Digital Rights Management (DRM) systems in a low-efficiency storage device are provided. The host device includes a plurality of DRM systems and a DRM system-shared interface module. The DRM systems provide pieces of DRM-re... | 09/20/2011 |
| 8023653 | Media key-transformation obfuscation in advanced access content system A modified media key used to decrypt protected media content stored on an optical disc, such as an HD-DVD or Blu-ray disc, is created through application of a transformation using a constant value which is programmatically generated by procedural code that runs on a... | 09/20/2011 |
| 8014524 | Scaling independent technique for watermarking images with recorder shut-off A robust technique to prevent illicit copying of video information notwithstanding the use of image scaling. A watermark is embedded into the video signal (e.g., DVD's content or other video sources) at different scales (i.e., sizes). The watermark is maintained at ... | 09/06/2011 |
| 8009832 | Method of managing copy protection information of a recording medium, recording medium with copy protection information for contents recorded thereon, and reproducing method for the recording medium The present invention relates to a method of managing CPI (Copy Protection Information) for preventing unauthorized copy of encrypted content recorded on a high-density recording medium such as a BD-ROM (Blu-ray Disc ROM). In the present method, when main content da... | 08/30/2011 |
| 7995754 | Recordation of encrypted data to a recordable medium Systems and methods of recording data are disclosed herein. A secure storage area is received from a host device. The secure storage area is indicative of a portion of a memory of the recordable medium to be recorded with encrypted data. A write command is received ... | 08/09/2011 |
| 7991156 | Digital rights management negotiation for streaming media over a network A digital rights management (DRM) method is negotiated prior to initiating delivery of a DRM encoded content item over a digital network between a client and a target server. The client identifies a link to the target server for accessing the DRM encoded content ite... | 08/02/2011 |
| 7991155 | Backup management device, backup management method, computer program, recording medium, integrated circuit, and backup system To provide a backup management device that deletes a content so as to be restorable in the future while protecting a copyright of the content, in a case where there exists a backup of the content. In an HD recorder, a first information storage unit stores a content,... | 08/02/2011 |
| 7986782 | Method and system for managing rights in digital information over a network A method and system for distributing digital information is disclosed. Preferably, a user acquires a tangible object which contain a code authorizing access to the digital information. The user reads the tangible object through a reader, which sends the code to a se... | 07/26/2011 |
| 7983416 | Information processing device, information processing method, and computer program An information processing device that executes processing for outputting recording data to an information recording medium includes a storing unit that stores common data that includes encrypted content, key information applied to decoding of the encrypted content, ... | 07/19/2011 |
| 7957529 | Procurement and audit of digital rights management event data A method to procure and audit digital rights management (DRM) event data by collecting a first set of event data in a first event data format, converting the first set of event data to one or more standardized event data formats, and communicating the first set of e... | 06/07/2011 |
| 7933409 | Content playback device To provide a content playback device capable of protecting content according to DRM, when decrypting encrypted content recorded on a recording medium and playing the decrypted content. If key generation information is “00”, a key control unit 104 concaten... | 04/26/2011 |
| 7933410 | System and method for a variable key ladder A method of generating encryption and decryption keys for a multiple tier, variable key ladder (VKL) hierarchy includes determining a device key based on network connection and configuration data contained in conditional access system firmware, decrypting and extrac... | 04/26/2011 |
| 7925017 | Information recording device, information playback device, information recording medium, information recording method, information playback method, and program providing medium An information recording device uses a data storage device such as media having a built-in flash memory. When data is stored in the data storage device, different encryption keys are used for different sectors. Each encryption key is stored in the header of content.... | 04/12/2011 |
| 7920701 | System and method for digital content protection A digital content system is disclosed. A security engine disposed in a bridge provides cryptographic services. Clear text digital data received from a central processing unit is encrypted and transferred via the bridge over unsecured data paths as cipher text. ... | 04/05/2011 |
| 7889863 | Recording device, recording medium, and content protection system A recording/playback apparatus is capable of using pre-image-converted content in a case of transferring an image-converted content to another device, then back from transfer-destination device to the recording/playback apparatus. The recording/playback apparatus in... | 02/15/2011 |
| 7885407 | Transmitting apparatus, receiving apparatus, and data transmission system Video data exploitation by alteration of data is prevented. An extractor 111 extracts valid video data in data 110 and predetermined data in the data. An inserter 114 inserts an arithmetic operation result of the predetermined data by an arithme... | 02/08/2011 |
| 7873162 | Reproducing method, reproducing apparatus, recording method, and recording apparatus A recording method including searching for at least one of a plurality of free areas on a storage medium, said storage medium including a file that is stored according to a file system; generating a track descriptor; generating a part descriptor; recording data encr... | 01/18/2011 |
| 7869595 | Content copying device and content copying method A content copying device has a mutual authentication section that performs a mutual authentication with a copy source recording medium and a copy destination recording medium respectively and generates a first medium unique key and a second medium unique key, a cont... | 01/11/2011 |
| 7844054 | Stream recording and/or reproducing apparatus and method An information recording and/or reproducing method for supervising the information, such as an input source, in a stream recorded on a recording medium. If, in a reproduction processing of reproducing an AV stream from the recording medium, the source_security_info,... | 11/30/2010 |
| 7840005 | Synchronization of media signals A method for synchronization of a media signal computes features of the media signal and determines redundancy of the features to establish synchronization. The synchronization method is adapted for both temporal and spatial synchronization. For spatial synchronizat... | 11/23/2010 |
| 7840006 | Content distribution system and content distribution method Disclosed herein is a content distribution system including: a content distribution server; a sender terminal; and a receiver terminal; wherein the content distribution server including a communication block; a recording block; a content management block; a content ... | 11/23/2010 |
| 7831043 | System and method for cryptographically authenticating data items A cryptographic authentication system comprises an authentication media key block that comprises media key precursors. The system generates transformed keys by applying a function to a media ID of a media and each of the media key precursors, and generates entries i... | 11/09/2010 |
| 7822201 | Methods and apparatus for persistent control and protection of content A novel method and apparatus for protection of streamed media content is disclosed. In one aspect, the apparatus includes control means for governance of content streams or content objects, decryption means for decrypting content streams or content objects under con... | 10/26/2010 |
