Video reproducing apparatus with variable delay means

Claim 1

An apparatus for reproducing television signals recorded on a magnetic tape by moving the tape at a predetermined speed past a rotatable transducer having a pair of magnetic heads with mutually different azimuth angles in a manner such that the television signal is recorded in parallel oblique tracks each containing one field of the television signal with sectors corresponding to individual line intervals of the television signal on adjacent tracks being aligned with each other in a direction normal to the tracks and the beginning and end of adjacent tracks being offset by a predetermined number of line intervals, said apparatus comprising a rotary transducer with two magnetic heads for reading the signal recorded on said tape, said two heads having mutually different azimuth angles corresponding to the azimuth angles of the pair of heads used for recording said signals, means for moving said tape past said rotary transducer, means for selectively controlling said tape moving means so as to stop movement of said tape or to move said tape at a speed which deviates from said predetermined speed depending on a mode of operation selected by the user, means coupled to said magnetic head for delaying, by a variable amount, signals read from said tape, and second means for controlling said delay means in dependence on the selected mode, on the line offset between adjacent tracks, and on the magnetic head instanteously reading a given track so that the signals read from said tape which correspond to consecutive fields of said television signal are delayed by amounts such that the time intervals between every two consecutive vertical synchronizing pulses of each field are substantially equal and there is no phase jump between the horizontal synchronizing pulse trains of consecutive fields.

Claim 2

An apparatus for reproducing television signals recorded on a magnetic tape by moving the tape at a predetermined speed past a rotatable transducer having a pair of magnetic heads with mutually different azimuth angles in a manner such that the television signal is recorded in parallel oblique tracks each containing one field of the television signal with sectors corresponding to individual line intervals of the television signal on adjacent tracks being aligned with each other in a direction normal to the tracks and the beginning and end of adjacent tracks being offset by a predetermined number of line intervals, said apparatus comprising a rotary transducer with two magnetic heads for reading the signal recorded on said tape, said two heads having mutually different azimuth angles corresponding to the azimuth angles of the pair of heads used for recording said signals, means for moving said tape past said rotary transducer, means for selectively controlling said tape moving means so as to stop movement of said tape or to move said tape at a speed which deviates from said predetermined speed depending on a mode of operation selected by the user, means coupled to said magnetic head for delaying, by a variable amount, signals read from said tape, and second means for controlling said delay means in dependence on the selected mode, on the line offset between adjacent tracks, and on the magnetic head instanteously reading a given track so that the signals read from said tape which correspond to consecutive fields of said television signal are delayed by amounts such that the time intervals between every two consecutive vertical synchronizing pulses of each field are substantially equal and there is no phase jump between the horizontal synchronizing pulse trains of consecutive fields.