| 摘要 |
PURPOSE:To automatically execute the program selection of the sound multiplex broadcasting simultaneously with the starting of the broadcasting by obtaining the AND of the means to detect the receiving of the stereo or the bilingual broadcasting and the switch means to select these broadcastings. CONSTITUTION:When the mono RAM program is viewed, the next stereo pro gram is started and at the time of outputting the voice of the stereo program is desired, a switch 11 is closed. Then, when the stereo program is started, the output A of a stereo pilot detecting circuit 7 comes to be an H level, and therefore, an output E of an 'and' circuit 13 comes to be the H level and a stereo SAP switching circuit 16 is automatically changed over so as to voice- output the stereo program. Thereafter, when the program is changed to the mono RAM program, the output E of the AND circuit 13 returns to an L level, and therefore, the switching circuit 16 returns to the monaural side. The above- mentioned action is also executed to a SAP signal detecting circuit 8, a switch 12 and the AND circuit 14.
|
