Abstract: A television conference system having at least one of the functions of automatically directing a camera toward a speaker, of transmitting video signals of picture images from a plurality of television cameras, and of displaying a document image.

Abstract: An electronic conference system for a remote conference among a plurality of stations, each of the stations comprising an absolute number providing element, for assigning absolute number to an input picture data, an absolute number transmission element for transmitting the absolute number to another station, and a picture data transmitting element for transmitting the picture data only when the other station does not store the number equal to the absolute number, whereby, the same picture data are supervised or coordinated by the same absolute number.

Abstract: A color information input system in which handwritten information, such as letters or figures, etc., is input on an entry area by being converted into electrical signals. In order to display the handwritten information in color, different colored pens are stocked in pen stockers, each pen stocker having a detector which outputs a detection signal when the pen is removed from the corresponding pen stocker. The pen being used on the entry area is detected when it is removed from its pen stocker and color information is generated from the detection signal and passed on to a display unit.