| 摘要 |
The invention relates to a data-storage system ( 100, 200 ) comprising a processor means ( 110, 260 ) for obtaining identifier data of media content existing in the system, the identifier data being used for identifying the media content, and a memory ( 120, 265 ) for retaining the identifier data after the media content is absent from the system, a retrieval means being arranged to allow retrieval of the media content using the identifier data. The system, for example, a video camera retains the identifier data after the media content has been deleted or removed from the system. The identifier data may accumulate in the system independently of the media content, while the media content may still be retrieved.
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