To provide a communication system for correctly determining from which terminal among the terminals for students an answer quickly arrives with respect to a question from a terminal for teacher, for example.
Flickering states by the light emitting signals (uplink signals) La, Lb, ... of visible light obtained by converting ID data and answer data from the respective terminals 13a, 13b, ... for students with respect to the question from the terminal 14 for teacher are continuously imaged by an imaging apparatus 15. The data string of flickering images corresponding to respective seats 11a, 11b, ... for students are generated based on the imaging positions (x1, y1), (x2, y2), ... of an imaging range E corresponding to the respective seats 11a, 11b, ... for students in the continuously imaged respective images t0, t1, t2, .... Then, the ID data, answer data and answer time information of the respective students are analyzed, thereby displaying on the terminal 14 for teacher an answer arrival order display screen G4 where the student names and answers are associated in order of answering time.
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Tetsuya Kazama
Katsumura Hiro
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen