Patent ID: 7502546
Filing Date: 2009-03-10
Classification: H04N

Abstract:
1. A method for outputting a plurality of synchronous video signals from a plurality of digital recorders to a receiver, said synchronous video signals selected from a group comprising a playback of recorded signals, relayed signals and a combination thereof are originated and fed to said digital recorders via first transmission lines by a plurality of video transmitters; each of said synchronous video signals contains a code signal corresponding to a code allotted to one of said transmitters and a synchronous time and date signal corresponding to one of the time and date of the recording of said recorded signal and the time and date of outputting said relayed signal; said synchronous video signals are fed to said receiver via second transmission lines for outputting a display signal selected from a group comprising at least one individual video signal, sequencing individual video signals, at least one multi screen signal and sequencing multi screen signals; said receiver includes an external synchronizing signal generator for synchronizing said plurality of digital recorders and a controller for generating a retrieval signal for retrieving said video signals on the basis of at least one said code and said time and date and for selecting said display signal; each of said digital recorders include a synchronizing receiving and application circuit selected from a group comprising central synchronizing circuit for synchronizing a central processing unit included in each said digital recorders, playback lock circuit for synchronizing said playback of recorded signals, combined lock circuit for synchronizing said recording, said playback and a monitoring mode, time base correction circuit for synchronizing the timing of an internal synchronizing of a video signal originated by at least one of said transmitters, relay circuit for transferring said external synchronizing signal to at least one of said transmitters via said first transmission lines and combinations thereof, said method comprising the steps of: a. generating and feeding said external synchronizing signal to synchronize said plurality of digital recorders via said second transmission lines; b. generating and feeding said retrieval signal to said plurality of digital recorders via said second transmission line for selectively retrieving said synchronous video signals; and c. selecting said display signal.