Database system
First Claim
1. A database system provided in a network system capable of exchanging data, and capable of storing and retrieving the data via the network system, comprising:
- first data file means, having a rewritable memory unit, for storing data supplied through the network system;
second data file means, having a memory unit with a larger memory capacity than that of said memory unit of the first data file means, for storing data to be transferred from said first data file means; and
file management means, for managing the access and storage of data in both said first and second data file means, said file management means being responsive to a utilization characteristic of data stored in said first data file means.
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Accused Products
Abstract
A database system is provided in a network system capable of exchanging medical data, including at least image data and key data associated therewith, and can store and retrieve the medical data via the network system. The database system has first and second data file devices and a file management device. The first data file device stores image data supplied via the network system in a first rewritable storage. The second data file device stores image data transferred from the first storage in a non-rewritable second storage. The file management device has an index data storage for storing the key data, supplied via the network system, and memory addresses of image data, which correspond to the key data, on the first and second storages in correspondence with each other, and manages storing and reading of the image data in and from the first and second data file devices.
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Citations
21 Claims
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1. A database system provided in a network system capable of exchanging data, and capable of storing and retrieving the data via the network system, comprising:
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first data file means, having a rewritable memory unit, for storing data supplied through the network system; second data file means, having a memory unit with a larger memory capacity than that of said memory unit of the first data file means, for storing data to be transferred from said first data file means; and file management means, for managing the access and storage of data in both said first and second data file means, said file management means being responsive to a utilization characteristic of data stored in said first data file means. - View Dependent Claims (2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A database system provided in a network system capable of exchanging data, and capable of storing and retrieving the data via the network system, comprising:
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first data file means, having a rewritable memory unit, for storing data supplied through the network system; second data file means, having a memory unit with a larger memory capacity than that of said memory unit of the first data file means, for storing data to be transferred from said first data file means; and file management means, for managing the access and storage of data in both said first and second data file means, said file management means being responsive to a utilization characteristic of data stored in said first data file means; a third data file means, which has a rewritable memory unit having a memory capacity larger than that of said memory unit of the first data file means and smaller than that of said memory unit of the second data file means, for storing data transferred from said first file means, and said second data file means is a means for storing data transferred from said memory unit of the third data file means; a fourth data file means, which has a non-rewritable memory unit with a memory capacity larger than that of said memory unit of the second data file means, for storing data transferred from said second data file means; said memory unit of the second data file means is an optical disc unit having an optical disc as a data recording medium, and said fourth data file means includes a memory unit comprising an optical disc stock unit capable of stocking a plurality of optical discs and carrying means for moving an optical disc between said optical disc stock unit and said optical disc unit.
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21. A database system provided in a network system capable of exchanging data, and capable of storing and retrieving the data via the network system, comprising:
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first data file means, having a rewritable memory unit, for storing data supplied through the network system; second data file means, having a memory unit with a larger memory capacity than that of said memory unit of the first data file means, for storing data to be transferred from said first data file means; and file management means, for managing the access and storage of data in both said first and second data file means, said file management means being responsive to a utilization characteristic of data stored in said first data file means; said first data file means includes first data companding means for compressing and then storing data, and for expanding data to be read out and then outputting the decoded data, and said second data file means includes second data companding means for compressing data with a higher compressing ratio than that of said first companding means and then storing the compressed data, and for expanding data to be read out, and outputting the decoded data; said first data companding means is a data companding means capable of completely decoding compressed data, and said second data companding means is a data companding means wherein data decoded thereby is degraded in accordance with a compression ratio thereof. - View Dependent Claims (6, 7)
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Specification