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Media storage and retrieval system

  • US 5,267,351 A
  • Filed: 12/22/1989
  • Issued: 11/30/1993
  • Est. Priority Date: 12/22/1989
  • Status: Expired due to Term
First Claim
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1. A method of managing digitized media data stored in a plurality of media files in a media file database, comprising the steps of:

  • reading the media files from the media files database located on a storage device into a working memory;

    building in the working memory, in response to reading the media files, a table of relations identifying media equivalent to others in at least one common subsection by a source identifier that identifies a media source and a segment of said media source identified by a time range as indicated by lengths, frames, time codes or film edge numbers depending on the type of indexing used on the source media;

    accepting a request for an operation on a part of a specified one of the media files, the part being specified in the request by a start time and an end time of the specified media file;

    locating the requested media file in the table of relations and, if the requested media segment is not obtained, locating a media file equivalent to the requested media file that satisfies the request;

    returning a handle to the located media file; and

    writing the media files and the table of relations from the working memory to the media file database on the storage device.

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