Strong Signal Selective Recording Method and Apparatus for TV Full Auto Search

摘要

In the TV full auto search according to the present invention, the strong signal selective recording method and apparatus selectively record only the frequency of the strong signal among the input RF signals, which is very efficient when selecting a channel. A first step of sequentially inputting a radio frequency (RF) signal for each channel; a second step of calculating an automatic gain control voltage of the RF signal input in the first step; and the second step The third step of comparing the automatic gain control voltage calculated in step 2 with the preset value Th, and as a result of the comparison in the third step, the automatic gain control voltage calculated in the second step is the preset value ( If less than Th), it is determined that the RF signal input for each channel in the first step is a strong signal, and recording the frequency of the RF signal for each channel input in the first step for each channel in the memory unit It consists step. In addition, the strong signal selective recording apparatus in a TV full auto search according to the present invention, while sequentially inputting and outputting a plurality of RF (Radio Frequency) signals for each channel, the automatic gain control voltage of the input RF signal The AGC unit calculates and outputs (Automatic Gain Control Voltage), and receives an Automatic Gain Control Voltage from the AGC unit, and the Automatic Gain Control Voltage is a preset value (Th). A determination unit that outputs a determination signal only when it is less than a control unit, a control unit which outputs a control signal in response to the determination signal provided from the determination unit, and inputs an RF signal in the same way as the AGC unit, A converter for converting and outputting a frequency into a digital signal, and for each channel, a digital signal provided from the converter in response to a determination signal provided from the controller. It is composed of a memory unit for recording.