abstract:Overhead information is digital information transferred across the functional interface between a user and a telecommunications system, or between functional units within a telecommunications system, for the purpose of directing or controlling the transfer of user information or the detection and correction of errors.
Syntheticvision, which ismoreapplied in military domain, refers tothefusiondisplaybetween peripheralsituationofcockpitandsome overheadinformation, such as character, order and database.
Its screen is three feet by two feet and employs surveillance information to give those in charge an overhead view of a war zone that shows the position of both good guys and bad.
Local controllers (X-NET) gather this information and deliver to a web-controller via GPRS. The overhead sensors are line powered, and the X-NET Controller can be powered by a low voltage supply or a solar panel.
Many consumers, in the market for big-ticket electronic items, shop Best Buy stores and then use the information and advice received to make informed on-line purchases at lower prices from retailers with less overhead than Best Buy.