| 摘要 |
PURPOSE:To discriminte a stereo broadcast from a bilinguial broadcase, based on the number of pulses of control signal included in one period of pilot signals by a frequency division output signal, by frequency-dividing the pilot signal in multiplex braodcast signals with the control signal in the broadcast signal. CONSTITUTION:The number of pulses of the control signal included in one period of pilot signal is different from the stereo broadcast and biliguial braodcast. Further, gate pulses are input to FF14-19 constituting a binary counter 20 being the frequency-divisiond means from a gate FF12, and a clock signal is input from a terminal 13. In case of stereo broadcase, the output of an NAND gate 21 is at H and in case of biliguial broadcast, it is at L. Thus, different output is obtained at a filter output terminal 26 for bilinguial broadcast and stereo broadcast. |
