Video signal compensation system

摘要

A video signal compensation system wherein a brightness signal and a chrominance signal are separated from each other by a comb filter and a color video signal of a buried subcarrier system in which the brightness signal and the chrominance signal are combined in a frequency interleaved relation, and signal defect portions for the brightness signal and the chrominance signal are substituted by a signal having a frequency equal to an integer multiple of a frequency corresponding to one horizontal scanning period. An output of a one-horizontal scanning period delay line which constitutes the comb filter for extracting the chrominance signal is applied to an input of the comb filter only during the signal defect period with a phase of the chrominance signal being reversed, to separate the chrominance signal and compensate for the signal defect portion of the chrominance signal.