employed as a time base error corrector of a video signal in fig1 reference numeral 1 designates a video signal input terminal to which is supplied a video signal from for example a video tape recorder the video signal supplied to the video signal input terminal 1 is applied to a dc component adding circuit 2 and to a horizontal synchronizing signal separating circuit 3 the horizontal synchronizing signal obtained at the output side of the horizontal synchronizing signal separating circuit 3 is supplied as a sampling signal to a horizontal period sample and hold circuit 4 to which a random noise signal from a random noise generating circuit 5 is also supplied thus the horizontal period sample and hold circuit 4 samples the random noise signal with the horizontal synchronizing signal and holds the level of the random noise signal at that time until the following horizontal synchronizing signal is applied thereto the output signal from the horizontal period sample and hold circuit 4 is a dc voltage the level of which is shifted or changed at every horizontal period and this dc voltage with a shifting level is supplied to the dc component adding circuit 2 in the above description it is assumed that a clamped or dc restored video signal returned to a single.