| 摘要 |
A jitter correction system effectively corrects jitter in a television picture recorded and reproduced by a magnetic recording and reproducing apparatus. The system comprises a first phase comparator means for comparing the phase of a synchronizing signal of a reproduced video signal with the phase of an outside synchronizing signal for the vertical synchronizing interval. A phase modulation of either the outside synchronizing signal or the reproduced video signal responsive to the output of the first phase comparator means represents a detected phase difference. A second phase comparator means compares the phase of the rest of the outside synchronizing signal and the reproduced video signal with the phase of the output signal of the phase modulator means, for the horizontal synchronizing interval. The output of the second phase comparator means represents a detected jitter component corresponding to the distortion of the reproduced television picture. This output is utilized for effecting a correction of the jitter of the reproduced television picture.
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