| 摘要 |
PURPOSE:To make the connection of a signal cable between respective kinds of AV equipment unnecessary, to make the audition of a voice simple and moreover, to attain keeping one unit at the hand of using by frequency- modulating a sound signal and a video signal between a first AV unit and a second AV unit and transmitting with infrared radiation. CONSTITUTION:In a transmission part 16 of a first AV unit 10, an AV signal is supplied from a turner 11 through a selector 14, in a transmission part 21b of a second AV unit 20, the AV signal is supplied from miniature AV equipment 30 and the AV signal and a sound signal are frequency-modulated with frequency modulating circuits 31a and 31b respectively and are inputted through band pass filters 32a and 32b to a multiplexing circuit 33. The FM signals of multiplexed sound and video are inputted to an infrared radiation output part 34 which consists of a light emitting diode respectively, an output from it is inputted to an infrared radiation light receiving part 35 which consists of a light receiving diode and the obtained AV signal, that is, an FM video signal and an FM audio signal are wireless-transmitted between the units 10 and 20. |
