CLOCK FREQUENCY CONVERTING APPARATUS OF DIGITAL SIGNAL RECEIVING DEVICE

摘要

PURPOSE: A clock frequency converting apparatus is provided to prevent an omission or a duplication phenomenon in processing a video signal by providing a corresponding clock frequency to a corresponding block. CONSTITUTION: A switching unit(208c) selects one of the clock frequencies outputted from first and second phase locked loops(208a, 208b). A controller(212) controls the switching unit(208c) to output a clock frequency corresponding according to a frame rate of an inputted digital signal. The first phase locked loop(208a) generates a clock frequency of 74.25MHz and the second phase locked loop(208b) generates a clock frequency of 74.175MHz. The controller(212) controls the switching unit(208c) to select one of the clock frequencies from the first and second phase locked loops according to frame rates.