Signal editing system for magnetic recording and reproducing apparatus

Claim 2

A signal editing system for a magnetic recording and reproducing apparatus which includes at least one rotary magnetic head for recording on and reproducing from one portion of a magnetic tape a video signal having vertical and horizontal synchronizing signals, means for producing a control signal from the vertical synchronizing signal, a fixed magnetic head for recording on and reproducing from another portion of the magnetic tape said control signal, means responsive to said control signal for rotating the rotary magnetic head in synchronism with the control signal; said last-named means comprising first separator means for separating the vertical synchronizing signal from the video signal reproduced by said rotary magnetic head during the reproducing mode of said apparatus; camera means for generating a second video signal; synchronizing signal generator means for generating second vertical and horizontal synchronizing signals which are inserted into the second video signal; means for synchronizing said second vertical synchronizing signal with the output signal of said first separator means; second separator means for separating said second vertical synchronizing signal from the output of said camera means; means for producing a second control signal responsive to the output of said second separator means; means for recording the output Of said camera means on said one portion of the magnetic tape; means for recording said second control signal on the other portion of the magnetic tape; means responsive to the supplying of a video signal to said first separator means for separating the first vertical synchronizing signal from the video signal during the recording of the output of said camera; and means for stopping the recording of said second control signal while said rotary magnetic head reproduces the video signal from said one portion of the magnetic tape.

Claim 3

A signal editing system for a magnetic recording and reproducing apparatus which includes at least one rotary magnetic head for recording on and reproducing from one portion of a moving magnetic tape a video signal having vertical and horizontal synchronizing signals, means for producing a control signal from the vertical synchronizing signal, a fixed magnetic head for recording on and reproducing from another portion of the magnetic tape said control signal, a motor for moving the magnetic tape at a predetermined velocity by a current flowing therethrough from a power supply, means responsive to said control signal for rotating the rotary magnetic head in synchronism with the control signal; said last-named means comprising first separator means for separating the vertical synchronizing signal from the video signal reproduced by said rotary magnetic head during the reproducing mode of said apparatus; camera means for generating a second video signal; synchronizing signal generator means for generating second vertical and horizontal synchronizing signals which are inserted into the second video signal; means for synchronizing said second vertical synchronizing signal with the output signal of said first separator means; second separator means for separating the vertical synchronizing signal; means for selectively supplying to the second separator means either the output signal of the camera means or a third video signal having third vertical and horizontal synchronizing signals; means for producing a second control signal from the output of said second separator means; first combination means operative when the output signal of the camera means is supplied to the second separating means, said combination means including means for recording the output signal of said camera means on said one portion of the magnetic tape, and means for recording said second control signal on the other portion of the magnetic tape; second combination means operative when the third video signal is supplied to the second separating means, said last-named means including means for inserting an impedance element between said motor and said power supply in response to the supply of the third video signal to the second separator means, whereby current through the motor is decreased to reduce the velocity of the magnetic tape from the predetermined velocity, and AND gate circuit for combining said second vertical synchronizing signal with the control signal reproduced by the fixed magnetic head and generating an output signal only when said second vertical synchronizing signal coincides in time with the control signal reproduced by the fixed magnetic head, means responsive to the generation of the output signal from said AND gate circuit for short circuiting said impedance element, means responsive to the generation of the output signal from said AND gate circuit for recording said third video signal on said one portion of the magnetic tape, and means responsive to the generation of the output signal from said AND gate circuit for recording said second control signal on the other portion of the magnetic tape; means responsive to the supplying of a video signal to said first separator means for separating the first vertical synchronizing signal from the video signal, during the recording mode of said apparatus; and means for stopping the recording of said second control signal during the reproducing mode of said apparatus.

Claim 4

A signal editing system for a magnetic recording and reproducing apparatus which includes at least one rotary magnetic head for recording on and reproducing from one portion of a moving magnetic tape a video signal having vertical and horizontal synchronizing signals, means for producing a control signal from the vertical synchronizing signal, a fixed magnetic head for recording on and reproducing from another portion of the magnetic tape said control signal, a motor for moving the magnetic tape at a predetermined velocity by a current flowing therethrough from a power supply, means responsive to said control signal for rotating the rotary magnetic head in synchronism with the control signal; said last-named means comprising first separator means for separating the vertical synchronizing signal from the video signal reproduced by said rotary magnetic head during the reproducing mode of said apparatus; camera means for generating a second video signal; synchronizing signal generator means for generating second vertical and horizontal synchronizing signals which are inserted into the second video signal; means for synchronizing said second vertical synchronizing signal with the output signal of said first separator means; second separator means for separating the vertical synchronizing signal; means for selectively supplying to the second separator means either the output signal of the camera means or a third video signal having third vertical and horizontal synchronizing signals; means for producing a second control signal from the output of said second separator means; first combination means operative when the output signal of the camera means is supplied to the second separating means, said combination means including means for recording the output signal of said camera means on said one portion of the magnetic tape, and means for recording said second control signal on the other portion of the magnetic tape; second combination means operative when the third video signal is supplied to the second separating means, said last-named means including means for inserting an impedance element between said motor and said power supply in response to the supply of the third video signal to the second separator means, whereby current through the motor is decreased to reduce the velocity of the magnetic tape from the predetermined velocity, and AND gate circuit for combining said second vertical synchronizing signal with the control signal reproduced by the fixed magnetic head and generating an output signal only when said second vertical synchronizing signal coincides in time with the control signal reproduced by the fixed magnetic head, means responsive to the generation of the output signal from said AND gate circuit for short circuiting said impedance element, means responsive to the generation of the output signal from said AND gate circuit for recording said third video signal on said one portion of the magnetic tape, and means responsive to the generation of the output signal from said AND gate circuit for recording said second control signal on the other portion of the magnetic tape; means responsive to the supplying of a video signal to said first separator means for separating the first vertical synchronizing signal from the video signal, during the recording mode of said apparatus; and means for stopping the recording of said second control signal during the reproducing mode of said apparatus.