Multimedia Digital Library Systems for the Global Information Network

Hiromichi Fujisawa, Ph. D., Central Research Laboratory, Hitachi, Ltd.
Yusuke Mishina, Central Research Laboratory, Hitachi, Ltd.
Minoru Ashizawa, Central Research Laboratory, Hitachi, Ltd.
Kanji Kato, Information Systems R&D Division, Hitachi, Ltd.


Multimedia digital library systems are expected to be some of the most widely used applications on the global information networks of the next century. Through these systems, users at home, university, and offices will be able to directly obtain desired information at their desk.

This paper presents the concept behind these systems, their requirements, and Hitachi's Multimedia Digital Library prototype system.

The prototype system consists of library servers residing on workstations and clients on personal computers. The library server software is based on the Hitachi Integrated Document Information System for object-oriented document management and full-text search. Distinguishing features include image document retrieval using document recognition and support for "virtual personal libraries."

In addition, image documents can be retrieved through a query search of the table-of-content pages. A non-deterministic string search for recognized text information is implemented for more accurate search.

The virtual personal library provides broad support for user "information activities," allowing users to store retrieved information for later use without having to copy the entire contents. Users can extract desired portions of the information and can then paste a virtual copy of it into their own personal scrapbook.

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