| 摘要 |
A transaction verification system comprises a central data processing system and a plurality of satellite data processing systems discreet from the central data processing system. A plurality of audio and/or visual recorders are adapted to record sounds and/or images and to these into digital data which is transferred to the central data processing system by communication means. Each audio and/or visual recorder is associated with one or more satellite data processing systems and the central dab processing system includes a data store within which digital data received from the audio and/or visual recorders is stored. The data store being divided into subsidiary data stores, each associated with one or more satellite data processing systems and the central data processing system being programmed to store digital data from audio and/or visual recorders associated with a particular satellite data processing system in a subsidiary data store associated with that satellite data processing system and to communicate data stored in a subsidiary data store only to a satellite data processing system associated with that subsidiary data store. |
