JPS6444691A - On-vehicle satellite broadcast reception system - Google Patents

Abstract

PURPOSE:To prevent intermission of a picture and unpleasant noise sound due to the decrease in the reception level by providing a mute circuit interrupting an audio signal, a frame memory, and a reception level detection circuit comparing and deciding a reception level with a reference level required for normal video and audio signals and controlling the output to a television receiver. CONSTITUTION:If a vehicle is tilted or the reception is disturbed by an obstacle such as a building or a mountain and it is detected that the level of a reception signal is below the reference level, a reception level detection circuit 4 drives a mute circuit 5 to interrupt the audio signal inputted to the television receiver 9. Then a contact of a switch 7 is closed to keep the normal picture of a frame memory 6 just before and the contact of a selector switch 8 is turned to the position of the frame memory 6. If the reception level is decreased, the audio signal output to the television receiver is interrupted and the excellent stored picture just before when the reception level is sufficient is reproduced as the video signal.