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US 8,428,435 B2Granted
Content use device and recording medium
AssigneePanasonic Corporation
InventorsMasaya Yamamoto, Toshihisa Nakano, Ryuichi Okamoto, Motoji Ohmori
Life of this patent
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AssigneePanasonic Corporation
InventorsMasaya Yamamoto, Toshihisa Nakano, Ryuichi Okamoto, Motoji Ohmori
Estimating the term…
To provide a content playback device that can use content appropriately by avoiding output of content not permitted to be used according to contract information. A playback control unit 102 extracts a content name from playback control information in a playback path information table 210, and inquires of a rights management unit 108 whether content identified by the extracted content name is playable or not. If the content is judged as being unplayable, the playback control unit 102 extracts an alternative playback number from the playback control information, and extracts a content name from playback control information whose playback number matches the alternative playback number. The playback control unit 102 then instructs a decryption unit 103 and a playback unit 107 to decrypt and play back encrypted content identified by the extracted content name.
A content use device for using composite content recorded on a recording medium, the composite content including a plurality of pieces of content that are respectively protected by a plurality of different protection methods, the content use device comprising:
A content use method used in a content use device for using composite content recorded on a recording medium, the composite content including a plurality of pieces of content that are respectively protected by a plurality of different protection methods, the content use method comprising steps of:
A computer program embodied on a non-transitory computer-readable storage medium, the computer program being used in a computer for using composite content recorded on a recording medium, the composite content including a plurality of pieces of content that are respectively protected by a plurality of different protection methods, the computer program comprising program code operable to cause the computer to perform a method comprising steps of:
Dependencies are inferred from the claim text.