HIGH DEFINITION TELEVISION VIDEO (HDTV) SIGNAL EMPFAENGER UND VERFAHREN ZUR SIGNALVERARBEITUNG BEI EINEM DERARTIGEN EMPFAENGER

摘要

A method for receiving a high definition television signal has been used by the band-splitting and sub-sampling method. The concrete embodiment for the method can be accomplished by converting the received radio frequency signal into a first intermediate frequency signal, and by splitting a second intermediate frequency signal and a narrow band intermediate frequency signal therefrom. The narrow band intermediate frequency signal is lacked a given fixed frequency to demodulate the second intermediate frequency signal in a quadrature phase-shift technique. The demodulated signal is low-pass filtered and converted into a digital signal to separate into a synchronizing, an audio signal, a control signal therefrom. The digital signal is processed at high frequency band according to the control signal, and delayed a given time. The delayed signal is added to the signal processed at high frequency band. The added signal is separated into a luminance and chrominance signals to convert into an analog signals.