QUESTION ACCEPTING TYPE TELEVISION EDUCATION SYSTEM

摘要

PURPOSE:To provide an effective question accepting type TV education system. CONSTITUTION:The switchboard control parts 2' and 3' are controlled through a lecture terminal 1 and a control circuit 7, and the terminal 1 is connected to the attendant terminals 4-1-4-n by the switchboards 2 and 3 and via an image desceending circuit 5. Then a questioning terminal is selected by the switchboard 3 among those terminals 4-1-4-n and then separated once from the circuit 5. Then the selected questioning termianl is bidirectionally connected to the terminal 1 through an ascending circuit 6 and the circuit 5. the images of the termianl 1 and the questioning terminal are synthesized together by a screen dividing synthesizer 1-2 and displayed on a monitor 1-4. Thus the termianl 1 can recognize a fact that it is coneted to the queestioning terminal. When the question of the questioning termianl is finished, the questioning terminal gets out of the bidirectional connection state and is reset in the descending unidirectional connection state.