Synchronizing system for video recorders

Claim 2

A synchronizing arrangement for use in a color video recorder system comprising: apparatus for providing an incoming composite video signal, means for separating the color burst from said incoming video signal, a first oscillator, means for deriving from said first oscillator an unmodulated color subcarrier, a phase-locked loop for said first oscillator, said loop being effective in the recording mode and including means for comparing the phase of said unmodulated color subcarrier with the phase of said separator color burst, means for deriving from said first oscillator a motor reference for said recorder, whereby said motor reference is locked to said color burst, a second oscillator, a sync generator driven by said second oscillator and developing a sync pattern comprising a plurality of different series of repetitive pulses, means for separating the horizontal sync signal from said incoming video signal, a phase-locked loop for said second oscillator, said loop including means for comparing the phase of one of said pulse series with the phase of said separated sync signal, and apparatus for processing said video signal prior to recording, said apparatus including means controlled by others of said pulse series for impressing regenerated sync information on the video signal to be recorded.

Claim 3

A synchronizing arrangement as claimed in claim 1, wherein said means for deriving said color subcarrier and said means for deriving said motor reference include first and second frequency dividing means, respectively.

Claim 4

A synchronizing arrangement as claimed in claim 1, wherein said pulse series is a series of horizontal drive pulses and wherein there is interposed between said horizontal sync signal separating means and said second oscillator a horizontal automatic frequency control circuit and a pulse generator driving said automatic frequency control circuit, said frequency control circuit being also controlled by said generator.

Claim 5

A synchronizing arrangement as claimed in claim 1, wherein there is interposed between said horizontal sync signal separating means and said second oscillator a turnaround inhibit gate controlled by said recorder.

Claim 6

A synchronizing arrangement as claimed in claim 1, wherein said processing apparatus comprises means, including a trisequential switch, for converting said incoming video signal into trisequential form, and wherein there are provided trisequential sequencing means driven by said sync generator for providing said trisequential switch with series of trisequential driving pulses, each said series corresponding to one of said colors.

Claim 7

A synchronizing arrangement as claimed in claim 5, wherein said means for impressing regenerated sync information on the incoming video signal to be recorded includes logic circuitry controlled by predetermined ones of said repetitive pulse series for providing an additional series of synchronizing pulses placed on the back porch for identifying one of said series of trisequential driving pulses.

Claim 8

A synchronizing arrangement as claimed in claim 1, wherein said system, in addition to the recorder, also includes a color video camera and wherein circuit connections are interposed between said sync generator and said camera for also driving and synchronizing said camera in accordance with the sync pattern provided by said sync generator.

Claim 9

A synchronizing arrangement for use with a linear video tape recorder, said recorder providing a subcarrier-free off-tape video signal in playback, said arrangement comprising: a first oscillator, means for deriving from said first oscillator an unmodulated color subcarrier, a second oscillator, a sync generator driven by said second oscillator and developing a sync pattern comprising a plurality of different series of repetitive pulses, means for separating the horizontal sync signal from said off-tape video signal, a phase locked loop for said second oscillator, said loop including means for comparing the phase of one of said pulse series with the phase of said separated sync signal, and means for processing said off-tape video signal prior to display, said apparatus including means controlled by one of said pulse series for reinserting said unmodulated color subcarrier in the video signal to be displayed.

Claim 10

A synchronizing arrangement for use with a linear video tape recorder, said recorder providing a subcarrier-free off-tape video signal in playback, said arrangement comprising: a first oscillator, means for deriving from said first oscillator an unmodulated color subcarrier, a second oscillator, a sync generator driven by said second oscillator and developing a sync pattern comprising a plurality of different series of repetitive pulses, means for separating the horizontal sync signal from said off-tape video signal, a phase locked loop for said second oscillator, said loop including means for comparing the phase of one of said pulse series with the phase of said separated sync signal, and means for processing said off-tape video signal prior to display, said apparatus including means controlled by one of said pulse series for reinserting said unmodulated color subcarrier in the video signal to be displayed.

Claim 11

A synchronizing arrangement as claimed in claim 8, and further comprising means for deriving from said first oscillator a servo reference, whereby said servo reference and said unmodulated subcarrier are locked together.

Claim 12

A synchronizing arrangement as claimed in claim 8, wherein said off-tape signal is a trisequential signal, wherein said processing apparatus comprises means, including a trisequential switch, for converting said off-tape signal from trisequential form into parallel form, and wherein there are provided trisequential sequencing means driven by said sync generator for providing said trisequential switch with series of trisequential driving pulses, each said series corresponding to one of the colors.

Claim 13

A synchronizing system for use with a linear video tape recorder comprising: apparatus for providing an incoming video signal in the recording mode, means for separating the color burst from said incoming video signal, means for providing a subcarrier-free off-tape video signal in the playback mode, a first oscillator, means for developing from said first oscillator an unmodulated color subcarrier, a phase locked loop for said first oscillator, said loop being effective in the recording mode and including means for comparing the phase of said unmodulated color subcarrier with the phase of said separated color burst, and said first oscillator being free-running in the playback mode, a second oscillator, a sync generator driven by said second oscillator and developing a sync pattern comprising a plurality of different series of repetitive pulses, means for separating the horizontal sync signal from the video signal both in the recording mode and the playback mode, a phase locked loop for said second oscillator, said loop including means for comparing the phase of one of said pulse series with the phase of said separated sync signal, first apparatus for processing said incoming video signal prior to recording, said apparatus including means controlled by others of said pulse series for impressing regenerated sync information on the video signal to be recorded, and second apparatus for processing said off-tape video signal prior to display, said second appartus including means controlled by yet another of said pulse series for reinserting said unmodulated subcarrier in the video signal to be displayed.

Claim 14

A synchronizing system for use with a linear video tape recorder comprising: apparatus for providing an incoming video signal in the recording mode, means for separating the color burst from said incoming video signal, means for providing a subcarrier-free off-tape video signal in the playback mode, a first oscillator, means for developing from said first oscillator an unmodulated color subcarrier, a phase locked loop for said first oscillator, said loop being effective in the recording mode and including means for comparing the phase of said unmodulated color subcarrier with the phase of said separated color burst, and said first oscillator being free-running in the playback mode, a second oscillator, a sync generator driven by said second oscillator and developing a sync pattern comprising a plurality of different series of repetitive pulses, means for separating the horizontal sync signal from the video signal both in the recording mode and the playback mode, a phase locked loop for said second oscillator, said loop including means for comparing the phase of one of said pulse series with the phase of said separated sync signal, first apparatus for processing said incoming video signal prior to recording, said apparatus including means controlled by others of said pulse series for impressing regenerated sync information on the video signal to be recorded, and second apparatus for processing said off-tape video signal prior to display, said second appartus including means controlled by yet another of said pulse series for reinserting said unmodulated subcarrier in the video signal to be displayed.

Claim 15

A synchronizing arrangement for use in a color video recorder system, comprising: apparatus for providing an incoming composite video signal, means for separating the color burst from said incoming video signal, a first oscillator, means for deriving from said oscillator an unmodulated color subcarrier, said oscillator being phase locked, in recording, to said separated color burst through the medium of said subcarrier, means for deriving from said first oscillator a motor reference for said recorder, whereby said motor reference is locked to said color burst, a sync generator developing a sync pattern comprising a plurality of different series of repetitive pulses,

Claim 16

A synchronizing arrangement for use in a color video recorder system, comprising: apparatus for providing an incoming composite video signal, means for separating the color burst from said incoming video signal, a first oscillator, means for deriving from said oscillator an unmodulated color subcarrier, said oscillator being phase locked, in recording, to said separated color burst through the medium of said subcarrier, means for deriving from said first oscillator a motor reference for said recorder, whereby said motor reference is locked to said color burst, a sync generator developing a sync pattern comprising a plurality of different series of repetitive pulses,

Claim 17

means for separating the horizontal sync signal from said incoming video signal, a second oscillator driving said sync generator and being phase locked to said separated sync signal through the medium of one of said pulse series, and apparatus for processing said video signal prior to recording, said apparatus including means controlled by others of said pulse series for impressing regenerated information on the video signal to be recorded.

Claim 18

means for separating the horizontal sync signal from said incoming video signal, a second oscillator driving said sync generator and being phase locked to said separated sync signal through the medium of one of said pulse series, and apparatus for processing said video signal prior to recording, said apparatus including means controlled by others of said pulse series for impressing regenerated information on the video signal to be recorded.