| 摘要 |
PROBLEM TO BE SOLVED: To obtain information regarding contents distributed in the form of a storage medium from the inside of the storage medium or from an external network and to register and use the information as index information and its additional information. SOLUTION: This device is equipped with a storage means which stores the index information, a reproducing means which reproduces contents, a retrieval means which performs retrieval to find whether the index information is registered, a registering means which obtains and registers information when the information is not registered, and an external information acquiring means which obtains information from an external network.
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