Stabilization of magnetically recorded color television signals

Claim 1

A SYSTEM FOR RECOVERING COLOR TELEVISION SIGNALS INCLUDING COLOR CARRIER SYNCHRONIZING SIGNALS AND LINE SYNCHRONIZING INFORMATION FROM A LONGITUDINALLY MOVING RECORDING MEDIUM ON WHICH SAID COLOR SIGNALS ARE RECORDED AS SUPPRESSED CARRIER MODULATED SIGNALS ON PARALLEL RECORDING TRACKS EXTENDING SUBSTANTIALLY TRANSVERSELY OF THE MEDIUM, IN WHICH SYSTEM REPRODUCING HEADS ARE SWITCHED DURING THE RETURN TRACES OF PICTURE LINES, SAID SYSTEM COMPRISING: A PLURALITY OF REPRODUCING HEADS; ROTARY MEANS CARRYING SAID HEADS FOR SYNCHRONIZING THE ADVANCE OF THE MEDIUM AND FOR ADVANCING THE HEADS TRANSVERSELY ONE AT A TIME IN CYCLIC SEQUENCE ACROSS THE RECORDING MEDIUM AND DELIVERING A SWITCHING PULSE FOR EACH CHANGE OF ONE HEAD FOR THE NEXT IN SEQUENCE; SWITCH MEANS CONNECTED WITH EACH HEAD AND CYCLICALLY CLOSED BY SAID SWITCHING PULSES AT THE NEXT OCCURRING RETURN TRACE; AMPLIFIER AND DEMODULATOR MEANS CONNECTED WITH SAID SWITCH MEANS AND DELIVERING SAID MODULATED COLOR SIGNALS AND LINE SYNCHRONIZING PULSES; A LOCAL OSCILLATOR FOR GENERATING AN AUXILIARY COLOR CARRIER AND INCLUDING OSCILLATOR PHASE COMPARISON AND FREQUENCY CONTROL MEANS; FIRST COLORCARRIER-SYNCHRONIZING SIGNAL GATING MEANS CONNECTED TO BE CONTROLLED BY LINE PULSES FOR DELIVERING COLOR CARRIER SYNCHRONIZING SIGNALS FOR EVERY LINE, SAID COLOR CARRIER SYNCHRONIZING SIGNALS BEING APPLIED TO SAID PHASE COMPARISON AND FREQUENTLY CONTROL MEANS FOR CORRECTING THE FREQUENCY OF SAID OSCILLATOR AS WELL AS TO A SECOND COLOR CARRIER SYNCHRONIZING SIGNAL GATING MEANS CONTROLLED BY SAID SWITCHING PULSES AND CONNECTED TO DELIVER THE FIRST COLOR CARRIER SYNCHRONIZING SIGNAL AFTER EACH SWITCHING PULSE TO SAID OSCILLATOR FOR INSTANTANEOUSLY CHANGING ITS PHASE; AND DECODER MEANS CONNECTED WITH THE DEMODULATOR MEANS TO RECEIVE SAID MODULATED COLOR SIGNALS AND CONNECTED WITH THE OSCILLATOR TO RECEIVE A PHASE-CONTROLLED CARRIER TO BE COMBINED THEREWITH AND SAID DECORDER DELIVERING THE RECOVERED COLOR SIGNALS AFTER DEMODULATION AND VIDEO BRIGHTNESS SIGNALS.

Claim 2

A SYSTEM FOR RECOVERING COLOR TELEVISION SIGNALS INCLUDING COLOR CARRIER SYNCHRONIZING SIGNALS AND LINE SYNCHRONIZING INFORMATION FROM A LONGITUDINALLY MOVING RECORDING MEDIUM ON WHICH SAID COLOR SIGNALS ARE RECORDED AS SUPPRESSED CARRIER MODULATED SIGNALS ON PARALLEL RECORDING TRACKS EXTENDING SUBSTANTIALLY TRANSVERSELY OF THE MEDIUM, IN WHICH SYSTEM REPRODUCING HEADS ARE SWITCHED DURING THE RETURN TRACES OF PICTURE LINES, SAID SYSTEM COMPRISING: A PLURALITY OF REPRODUCING HEADS; ROTARY MEANS CARRYING SAID HEADS FOR SYNCHRONIZING THE ADVANCE OF THE MEDIUM AND FOR ADVANCING THE HEADS TRANSVERSELY ONE AT A TIME IN CYCLIC SEQUENCE ACROSS THE RECORDING MEDIUM AND DELIVERING A SWITCHING PULSE FOR EACH CHANGE OF ONE HEAD FOR THE NEXT IN SEQUENCE; SWITCH MEANS CONNECTED WITH EACH HEAD AND CYCLICALLY CLOSED BY SAID SWITCHING PULSES AT THE NEXT OCCURRING RETURN TRACE; AMPLIFIER AND DEMODULATOR MEANS CONNECTED WITH SAID SWITCH MEANS AND DELIVERING SAID MODULATED COLOR SIGNALS AND LINE SYNCHRONIZING PULSES; A LOCAL OSCILLATOR FOR GENERATING AN AUXILIARY COLOR CARRIER AND INCLUDING OSCILLATOR PHASE COMPARISON AND FREQUENCY CONTROL MEANS; FIRST COLORCARRIER-SYNCHRONIZING SIGNAL GATING MEANS CONNECTED TO BE CONTROLLED BY LINE PULSES FOR DELIVERING COLOR CARRIER SYNCHRONIZING SIGNALS FOR EVERY LINE, SAID COLOR CARRIER SYNCHRONIZING SIGNALS BEING APPLIED TO SAID PHASE COMPARISON AND FREQUENTLY CONTROL MEANS FOR CORRECTING THE FREQUENCY OF SAID OSCILLATOR AS WELL AS TO A SECOND COLOR CARRIER SYNCHRONIZING SIGNAL GATING MEANS CONTROLLED BY SAID SWITCHING PULSES AND CONNECTED TO DELIVER THE FIRST COLOR CARRIER SYNCHRONIZING SIGNAL AFTER EACH SWITCHING PULSE TO SAID OSCILLATOR FOR INSTANTANEOUSLY CHANGING ITS PHASE; AND DECODER MEANS CONNECTED WITH THE DEMODULATOR MEANS TO RECEIVE SAID MODULATED COLOR SIGNALS AND CONNECTED WITH THE OSCILLATOR TO RECEIVE A PHASE-CONTROLLED CARRIER TO BE COMBINED THEREWITH AND SAID DECORDER DELIVERING THE RECOVERED COLOR SIGNALS AFTER DEMODULATION AND VIDEO BRIGHTNESS SIGNALS.