Time base corrector for eliminating time base fluctuations in a composite video signal

摘要

A time base corrector of composite video signal using memory. In the back porch and front porch of a composite video signal, offset voltages having polarities opposite to each other and a level corresponding to the level of a phase error signal are added to the phase error signal and are used as an input signal of a VCO for generating a writing clock. As the result, jitter components which cannot be removed by the PLL only can be eliminated.