PURPOSE: To simply attain FM stereo recording by setting the recording system of an audio signal automatically when a received audio signal by an audio multiplex tuner is a bilingual signal at an 8-mm video tape recorder.
CONSTITUTION: An audio signal received by an audio multiplex tuner 7 is inputted to an audio multiplex signal demodulation circuit 8 as a modulation signal and inputted simultaneously to a control signal detection circuit 10. A stereo control signal 10a and a bilingual control signal 10b are inputted to the audio multiplex signal demodulation circuit 8, and when an input modulation signal of the audio multiplex signal demodulation circuit 8 is a stereo signal, Lch, Rch signals are outputted and when an input modulation signal of the audio multiplex signal demodulation circuit 8 is a bilingual signal, main and sub audio signals are outputted. On the other hand, the bilingual control signal 10b is inputted to a selection control circuit 11, which outputs a control signal 11a to allow audio signal changeover switches 9a, 9b of an audio signal changeover switch circuit 9 to select the main and sub audio signals in interlocking with the bilingual control signal 10b.
SAGAWA MICHIAKI
KOMATSU KEIICHI
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