| 摘要 |
PROBLEM TO BE SOLVED: To allow each user to easily recognize a specific position and area of an image in relation to the discussion by displaying or deleting a pointer at a position based on pointer data on plural image display devices. SOLUTION: Graphics such as a painter, a line, a curve and a circle or a character are electronically drawn/written on an image displayed on a monitor display device 23 by using a mouse 25 or a tablet 26. A CPU 12 generates drawing data based on an input signal by the mouse 25 or the tablet 26. The drawing data are converted into image data via an HDTV input output device 16 and stored in a frame memory 24. The memory 24 has plural storage areas and images corresponding to the stored data of each of areas are separately displayed on the display device 23. Furthermore, the CPU 12 of the transmitter side sends a pointer delete signal to receiver side image transmitters via a transmission control unit 112 to delete data in each memory 24 of the receiver side transmitters. |
