AUDIO NOISE ELIMINATION METHOD OF A FREQUENCY MODULATION RECEPTION APPARATUS AND APPARATUS THEREOF CAPABLE OF REDUCING THE NOISE OF FREQUENCY MODULATION DEMOUDLATED AUDIO

摘要

PURPOSE: An audio noise elimination method of a frequency modulation reception apparatus and apparatus thereof are provided to control a noise attenuation method by determining noise by using a PLL(Phase Locked Loop) phase error signal of a pilot carrier synchronization detecting unit.;CONSTITUTION: A pilot carrier synchronization detecting unit detects PLL phase errors(S10). A noise detection unit determines noise by comparing phase error noise with thread hold values established for phase error signals(S20). A noise attenuation control unit outputs a noise attenuation control signal to a noise attenuator apparatus based on noise determination results(S30). A state flag of the noise attenuation control signal is successively changed by using a confidence counter.;COPYRIGHT KIPO 2012