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Data authentication system

A data processing apparatus a data processing method efficiently ascertain that data are valid, prevent encryption processing key data from leaking, eliminate illegal use of contents data, restrict contents utilization, apply a different plurality of data formats to contents and efficiently execute reproduction processing of compressed data. The verification process of partial data is executed by collating the integrity partial data as check values for a combination of partial data of a content, and the verification process of the entirety of the combination of partial data is executed by collating partial-integrity-check-value-verifying integrity check values that verify the combination of the partial integrity check values. Master keys to generate individual keys necessary for a process of such as data encryption are stored in the storage section and keys are generated as required. An illegal device list is stored in the header information of a content and referred to when data is used. Keys specific to a data processing apparatus and common keys are stored and the keys are selectively used according to the content use restriction. Plural content blocks are coupled, and at least a part of the content blocks is applied to an encryption process by an encryption key Kcon, then encryption key data that is the encryption key Kcon encrypted by an encryption key Kdis is stored in the header section. A content data is made of compression data and an expansion processing program or a combination of types of compression programs and the reproducing apparatus can determine an expansion program applicable to a compressed content.
Owner:SONY CORP

System and method for real time video production and multicasting

An integrated, fully automated video production system provides a video director with total control over all of the video production devices used to produce and broadcast a show. Such devices include, but are not limited to, cameras, robotic pan / tilt heads, video tape players and recorders (VTRs), video servers and virtual recorders, character generators, still stores, digital video disk players (DVDs), audio mixers, digital video effects (DVE), video switchers, and teleprompting systems. The video production system provides an automation capability that allows the video director to pre-produce a show, review the show in advance of “air time,” and then, with a touch of a button, produce the live show. In one embodiment, the invention provides a video production system having a processing unit in communication with one or more of the video production devices. The processing unit also records the show or elements from the show following its production. The show or elements can be recalled for subsequent broadcasts. An Internet interface supports live or on-demand requests for content from the video production. In an embodiment, an online user selects specific. elements and reorganizes the elements to personalize a broadcast. The processing unit receives and executes the online request to continuously stream or download the content to the user. In an embodiment, various supporting features enhance and extend the content of the video production, such as real time polling, hyperlinks to related web sites, video captions, and the like.
Owner:THOMSON LICENSING SA
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