System of updating an index file of frame sequences so that it i

Details System of updating an index file of frame sequences so that it i System of updating an index file of frame sequences so that it i

1993-03-16

1995-06-27

Black, Thomas G.

Dynamic magnetic information storage or retrieval

Head

Core

395154, 360 141, 364DIG1, 3642823, 3642821, G06F

Patent

active

054287740

ABSTRACT:
In the creation of the index file, one index record is allocated to each set consisting of one retrieval key and the initial and final positions in the motion image of one frame to which the retrieval key is allocated, and information on this set is stored therein. In the query processing, for a query specified by a Boolean expression of retrieval keys, records whose keywords match any of the retrieval keys included in the query are retrieved from the index file. Thereafter, all the initial and final positions of the matching records are arranged along a time axis. For each of intervals defined by those positions, a truth table is created in which the allocation of the retrieval keys included in the query is expressed by truth values, and the logical condition of the query is evaluated based on the table.

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Bassiouni, Proc. IEEE Compsac Conf., "A Logic for Handling Time in Temporal Databases", pp. 345-352.
Bassiouni et al, Proc. 13th Annual Computer Software and Applications Conference, Sept. 20-22 1989 pp. 201-208.

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