TV receiver and analog TV signal processing method
AssigneesRealtek Semiconductor Corp., Orion Microelectronics Corporation
InventorsKuang-Yu Yen, Liang-Hui Lee, Jackie K. Cheng, Thomas Francis Baker, Kuangyu Li
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Abstract
The present invention provides a TV receiver and an analog TV signal processing method. The TV receiver includes a tuner, an analog-to-digital converter, and a digital filter module. The tuner is utilized to receive an RF signal and generate a first signal; the analog-to-digital converter is coupled to the tuner for converting the first signal to a digital signal, and the digital filter module is coupled to the analog-to-digital converter for filtering the digital signal in order to filter an analog TV signal contained in the RF signal in digital domain.
Claims20
A TV receiver comprising:
- a tuner, for receiving an RF signal to generate a first signal;
- an analog-to-digital converter, coupled to the tuner, for converting the first signal into a digital signal;
- a digital filter module, coupled to the analog-to-digital converter, for filtering the digital signal to filter an analog TV signal comprised in the RF signal in digital domain and processing an audio carrier suppression for the analog TV signal in digital domain;
- a digital-to-analog converter, coupled to the digital filter module, for converting the filtered digital signal into a second signal;
- an analog TV demodulator, coupled to the digital-to-analog converter, for performing analog TV demodulation upon the second signal so as to demodulate the analog TV signal contained in the RF signal;
- and
- a digital TV demodulator, coupled to the analog-to-digital converter, for performing digital TV demodulation upon the digital signal so as to demodulate a digital TV signal contained in the RF signal.
A method for processing an analog TV signal comprising:
- tuning an RF signal to generate a first signal comprising an analog TV signal;
- performing analog-to-digital conversion on the first signal, to generate a digital signal;
- filtering the digital signal to filter the analog TV signal comprised in the first signal in digital domain and processing an audio carrier suppression for the analog TV signal in digital domain, and then generate a filtered signal;
- performing digital-to-analog conversion on the filtered signal, to generate a second signal;
- performing analog TV demodulation upon the second signal so as to demodulate the analog TV signal;
- performing digital TV demodulation upon the digital signal outputted by the analog-to-digital conversion, so as to demodulate a digital TV signal comprised in the first signal.
Dependencies are inferred from the claim text.