Screen signal processing device for weak signal and no signal of TV receiver

摘要

This research is about the broadcast signal from TV station. If it is received by weak signal or no signal, the display of broadcast signal will not be output, with the disadvantage of noise output.;This study is in the second degree of illustration.The auxiliary memory unit (46) stores the video letterhead of a specific screen,A voice signal amplification character (38) is connected to a music circuit (48),The voice signal amplification unit (38) and the video signal amplification unit (20) connect the detection level unit (50) to mycom (44),The above-mentioned mycom (44) can cut off the output of audio signal and video signal when the received broadcast signal level is below a certain level detected by the dispatcher (12), and separately input the video signal data of a specific screen for output.