CLOCK SIGNAL GENERATING APPARATUS AND CLOCK SIGNAL GENERATING METHOD

摘要

In an apparatus for generating a clock signal with the phase thereof locked to the phase of a horizontal synchronization signal, noise superposed on the horizontal synchronization signal of a digital video signal is eliminated. A noise suppressing block is provided in front of a phase comparator. Typically, the noise suppressing block comprises a slice block and a spike removing block. The noise suppressing block is used for eliminating noise superposed on the horizontal synchronization signal of a digital video signal which is output by an A/D converter.