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84results about "Card-like record carriers" patented technology

Access control for digital content

A recording arrangement operable to apply access control processing to input data content using a set of one or more content keys and to record access-controlled data content on a content storage medium, the arrangement comprising: an encryption apparatus having means for encrypting portions of the data content in dependence upon the set of content keys; and an interface to provide a secure data connection between the encryption apparatus and an access control memory device; an access-control memory device connected to the encryption apparatus via the interface and operable to store securely information from which the private key is derivable; the encryption apparatus and the access-control memory device co-operating to provide means for generating content access control data comprising at least one encrypted version of a respective subset of the set of content keys, the content access control data being generated in dependence upon at least one public key of a respective public key/private key pair associated with a further access-control memory device so that decryption of the set of content keys requires access to a private key of the respective public key/private key pair, the at least one public key used in the generation of the content access control data depending on data stored by the access-control memory device; and the recording arrangement having means for recording the encrypted information content and the content access control data on the content storage medium such that the information content may selectively be decrypted in dependence upon access to the private key of the respective public key/private key pair.
Owner:SONY UK LTD

Video/audio information collecting system using video camera and its editing system

A VTR collecting system includes a data recording/reproducing section (VTR) for recording/reproducing video and audio information taken by a video camera section to a video tape, an auxiliary data memory section (MEM, 4, 94) for storing editorial auxiliary data to be referred to in an edition process, and a memory control section (MCR, 20) for controlling the auxiliary data memory section, wherein when the video and audio information is recorded by the data recording/reproducing section, the editorial auxiliary data is written into the auxiliary data memory section under the control of the memory control section having an IC memory card (4) or temporary storage memory (94) for temporarily storing the editorial auxiliary data, and moreover, a VTR editing system includes an edition source VTR (8) having a video tape (3) loaded thereto for reading/reproducing data of the video and audio information recorded and collected therein, an editor VTR (9) for use in dubbing, and a system controller (10) reading the editorial auxiliary data and controlling the source VTR (8) and editor VTR (9) with reference to the editorial auxiliary data, wherein main information portion necessary for the edition among the recorded data in the video tape (3) set in the source VTR (8) is dubbed. Thus, a position of a necessary scene can be promptly searched for with reference to the editorial base data which are recorded when collected, thereby enabling quick and simple editorial work without reproducing the video tape from the start to the end.
Owner:PANASONIC CORP
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