METHOD OF REPRODUCING CONTENT

摘要

PROBLEM TO BE SOLVED: To solve the problems that broadcasting contents etc. are stored in a secondary recording medium such as a hard disk in consideration of copyright protection; encryption processing etc. of the contents is required; a built-in device such as a TV, an HDD recorder sometimes takes time for processing and obtaining key information even if using a dedicated encryption and decryption processing hardware; this causes a more serious problem when key information is updated at certain intervals in the contents; and processing time may not be completed in normal reproduction of the contents or trick play such as fast-forwarding/rewinding.

SOLUTION: The reproduction or the trick play can be completed within a real time without any problem by preparing key information to be required for encryption/decryption and preparing a mechanism for preventing a part not to be completed within the real time from being processed.

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