| 摘要 |
PURPOSE:To obtain the method for respective visitors to receive guide broadcasting at an event hall or an exhibition hall without jamming. CONSTITUTION:Digital voice information related to the guide broadcasting of respective displayed objects from each transmitter 2 for broadcasting installed corresponding to each displayed object (picture) 1 is converted to a modulated optical signal 6 and transmitted to a limited zone at high speed by an optical spatial transmission system. When each visitor 3 enters the limited zone of the transmitter 2 for broadcasting while carrying a receiver 4, the receiver 4 temporarily stores the digital voice information, which is demodulated by receiving the modulated optical signal 6, in a storage means and after that storage, voices are reproduced by automatically or manually setting a reproducing mode. Each visitor 3 can store the voice information in the carried receiver 4 only by staying at the limited zone of each transmitter 2 for broadcasting in a short period of time and can freely repeatedly listen to the guide broadcasting through an earphone 5. |
