Method and device for anti-interference of TV high-frequency signal

Abstract

The invention discloses a television high-frequency signal anti-interference method, which comprises the steps of receiving high-frequency signals outputted by a television signal line; setting DDR (double data rate) operating frequency to be a preset value when a frequency value of the high-frequency signals falls within an interference range of default value of the DDR operating frequency; and demodulating the high-frequency signals in a signal environment where the DDR operating frequency is the preset value. The invention further discloses a television high-frequency signal anti-interference device. According to the invention, the DDR operating frequency and the frequency of the high-frequency signals are staggered, interferences imposed on the high-frequency signals by the DDR operating frequency are weakened, the bit error rate of the signals is greatly reduced, the quality of video signals acquired after demodulation is effectively improved, and thus the quality and the definition of television images are improved.

Description

technical field [0001] The invention relates to the technical field of television, in particular to a method and device for anti-interference of television high-frequency signals. Background technique [0002] In the existing digital TV technology, the terminal that can play TV programs receives the high-frequency signal on the TV signal line through the tuner, and the tuner locks the frequency of the high-frequency signal, converts it into an intermediate frequency signal, and then locks it Hold the signal and demodulate the signal, and the output code stream will be displayed on the terminal display. However, with the development of integrated circuit technology, there will be certain interference between the electronic devices in the integrated circuit, and the operating frequency of the terminal's DDR (Double DataRate, double-rate synchronous dynamic random access memory) usually interferes with the tuner and peripheral The circuit will lead to an increase in the bit er...

AI Technical Summary

Problems solved by technology

However, with the development of integrated circuit technology, there will be certain interference between the electronic devices in the integrated circuit, and the operating frequency of the terminal's DDR (Double DataRate, double-rate synchronous dynamic random access memory) usually interferes with the tuner and peripheral The circuit will lead to an increase in the bit error rate of the signal, a deterioration of the signal quality, a large number of mosaics or a freeze on the screen, and even cause the tuner to fail to lock the frequency point, the demodulator to lock the signal, and thus fail to display the code stream. Problem, the electrical performance index of the terminal does not meet the national test standard

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