Video disc slow down processor with reverse color detector/corrector

A slow down processor, comprising:

• tape recorder means operable in a slow motion playback mode for producing a redundant field composite video signal comprising sequential sets of fields, each field being produced at a standard field rate, each set of fields comprising a predetermined number of similar fields, each field normally having a predetermined chrominance-burst phase relationship but being subject to anomalous reversals of said chrominance-burst phase relationship;
• frame storage means, responsive to said redundant field video signal and to a field storage selection signal produced by said tape recorder means, for storing a selected field of each set of fields and for reproducing the stored selected fields at a field rate less than said standard field rate to provide a non-redundant field video output signal of reduced bandwidth, said frame storage means being of a type in which the color burst component of composite video signal supplied thereto is not stored but is regenerated by color subcarrier regenerator means and added by adder means to the reproduced video output signal;
• error detector means responsive to first and second sequential components of said redundant field composite video signal for detecting said anomalous reversals of said chrominance-burst phase relationship and producing a control signal, said error detector means including means responsive to said first component for producing a reference signal having an overlapping time relationship with said second component, phase comparison means responsive to said reference signal and to said second component for producing a phase reversal indicating signal and output means responsive to said phase reversal indicating signal for producing said control signal for a predetermined period of time substantially equal to N times the length of one field of said redundant field composite video signal, N being equal to said predetermined number, vertical interval detector means having an input coupled to receive said redundant field composite video signal and an output for providing a vertical interval identification signal and control circuit means responsive to said vertical interval signal for enabling said phase comparison means solely during a selected line of the vertical interval of said redundant field composite video signal;
• and
• circuit means responsive to said control signal for effectively reversing the phase relationship of the chrominance and regenerated color burst components of said non-redundant field video output signal of said frame storage means when said control signal is present.