Apparatus for removing ghost from television signals including a transversal filter using coefficient data with unnecessary high frequency components removed therefrom

A television ghost removal apparatus comprising:

• transversal filter means which receives input television signals, for compensating waveform distortion included in said input television signals and removing ghost components;
• waveform extraction means for extracting signal waveforms of predetermined periods which include reference signals for ghost detection from said television signals;
• coefficient setting means for comparing a reference waveform signal and the extracted signal waveform extracted by said waveform extraction means to obtain error signals, setting coefficient data corresponding to the obtained error signals, and in accordance with the coefficient data, changing filter coefficients of said transversal filter means;
• band limiter means for removing unnecessary high-region components included in said coefficient data, and supplying the coefficient data from which the unnecessary high-region components have been removed to said transversal filter means, the unnecessary high-region components being outside a frequency band of said reference signal;
• and
• counter means for counting the number of times that said coefficient data have been generated by said coefficient setting means until said television signals return to a status where ghost has been removed, and for activating said band limiter means when said number of times reaches a predetermined number.