| 摘要 |
PURPOSE:To give feeling to participants of a conference as if they attended the conference together, while using a transmission line in a voice band, by providing a discriminating means of individual conference participants and a means displaying selectively an image of the said participants registered in advance. CONSTITUTION:An output of a transmitter operates a code signal transmitter 2, and a code signal is transmitted to a transmission line 5 via a transmission amplifier 3 and a hybrid circuit 4 together with a voice signal by utilizing a part of the voice signal band. The code signal and the voice signal of the 3rd party incoming via the line 5 pass through the hybrid 4 and a receiving amplifier 6, the voice signal is reproduced from a speaker 7 and the received code signal is read at a code reader 8, its output selects an image film corresponding to the said code signal from an image selector 9 among the photo films registered in advance and displays the film on a screen 10. Every time a transmitter changes, a part of the voice signal band is utilized, the incoming code signal replaces the image film and displays it. |
