Patent ID: 6067123
Filing Date: 2000-05-23
Classification: H04N

Abstract:
A monitor output device in an HDTV, comprising:an HD/NTSC tuner for selectively receiving one of an HD signal and an NTSC signal according to a present viewing mode, and selecting a channel for the received signal;an HD/NTSC IF module for converting the HD signal or the NTSC signal received from the HD/NTSC tuner to a baseband signal;an HD decoder for, when said HD/NTSC tuner receives the HD signal, decoding the baseband output by said HD/NTSC IF module signal received from the HD/NTSC IF module and outputting a digital HD video signal;a digital comb filter for, when said HD/NTSC tuner receives the NTSC signal, separating a luminance signal and a color signal from the NTSC signal received from the HD/NTSC IF module and outputting the luminance signal and the color signal;a chroma processor for converting the luminance signal and the color signal received from the digital comb filter to a first output color signal;an analog/digital converter for converting the first output color signal received from the chroma processor to a digital signal;a format converter for selectively receiving and converting one of the outputs of the HD decoder and the analog/digital converter according to the present viewing mode to a second output color signal of a predetermined display type;an HD/NTSC converter for converting the second output color signal received from the format converter to analog NTSC luminance and color signals;a luminance output terminal and a color output terminal, for monitor output;a switch for selecting one of the outputs of the digital comb filter and the HD/NTSC converter according to the present viewing mode, and outputting the selected signals to the luminance output terminal and the color output terminal; anda controller for controlling processing in the HD/NTSC tuner, the HD/NTSC IF module, the HD decoder, and the format converter, and switching the switch according to the present viewing mode.