METHOD FOR REGENERATING DOT CLOCK AND APPARATUS FOR REGENERATING DOT CLOCK USING THEREOF

摘要

The present invention provides a dot clock reproducing apparatus which automatically reproduces a dot clock easily by correcting a phase difference of a dot clock generated in the setting of a dot clock frequency of a video signal source, a transmission path, and the like. Sampling at a frequency different from that of the dot clock of the signal, detecting an aliasing frequency component occurring at that time, and reproducing the dot clock so that the aliasing frequency component does not occur An apparatus using this method, comprising: A / D conversion means for inputting an adjustment signal output from a video signal source, sampling the adjustment signal, and converting it into a digital signal; and this A / D conversion means. Output of the PLL means and A / D conversion means generated by dividing a predetermined synchronization signal by And frequency division means for analyzing the frequency of the adjustment signal from the control unit; and division ratio setting means for controlling the division ratio of the PLL means from the output of the frequency analysis means, and reproducing the dot clock so that the output of the PLL means is a dot clock signal. By providing a dot clock reproducing apparatus, a dot clock reproducing apparatus which automatically reproduces a dot clock easily by correcting a phase difference of a dot clock generated in the setting of a dot clock frequency of a video signal source, a transmission path, and the like is provided. .