TV signal reproducing system with synchronization correction - has generator delivering switching signal delayed w.r.t. line synchronization pulse at interval dependent on correction signal

摘要

The t.v. signal reproducing system uses a recording medium provided with synchronisation signals coupled with line synchronisation pulses. A time fault detector and measuring circuit (53) are provided to measure the time lapse between the beginning of the switching signal and the detected nest zero passage of the synchronising signal. A corresponding correction signal is delivered. The generator (38) delivers a switching signal which is delayed w.r.t. the line synchronisation pulse at a variable first time interval dependent upon the correction signal. The beginning of the switching signal is always positioned half way between two sequential zero passages of the synchronizing signal irrespective of mutual position changes of the line synchronisation pulses and the synchronisation signals.