Patent Number: 6,166,776

Title: Multi-receiving demodulator for demodulating signals received from multiple broadcasting systems

Abstract: There is provided a multi-receiving demodulator for receiving broadcasting signals from multiple broadcasting systems. The multi-receiving demodulator has a first band pass filter for selectively band-pass-filtering an intermediate frequency output from a tuner to obtain a color subcarrier corresponding to the broadcasting system of a received signal, according to a first control signal, and a second band pass filter for selectively band-pass-filtering the intermediate frequency output from the tuner to obtain an audio carrier corresponding to the broadcasting system of the received signal, according to a second control signal. A video demodulating portion receives the color subcarrier from the first band pass filter and selectively demodulates a video signal corresponding to the broadcasting system of the received signal in accordance with the second control signal. An audio demodulating portion receives the audio carrier from the second band pass filter and selectively demodulates an audio signal corresponding to the broadcasting system of the received signal in accordance with the second control signal. A controller detects a power source frequency and channel selection data, and provides the first and second control signals to the first and second band pass filters and the video and audio demodulating portions in accordance with the detected power source frequency and channel control signals.

Inventors: Moon; Byoung-cho (Suwon, KR)

Assignee: Samsung Electronics Co., Ltd.

International Classification: H04N 5/46 (20060101); H04N 005/46 ()

Expiration Date: 12/26/2017