MULTIPLE VIDEO CONFERENCE SYSTEM

PURPOSE:To simplify a system and to reduce the production cost of the system by successively synthesizing analog video signal outputs and displaying a synthesized image on the screen of one monitor television by a multiple image synthesizer, converting the displayed data into digital data by a video signal coder/ decoder(CODEC) and then distributing the digital data to respective communication network control units(NCUs). CONSTITUTION:In the system, n data subscriber equipments(DSUs) (b) and n NCUs (c) are connected to a digital communication line network (a). The digital signals of image information on n points are inputted to the CODEC (e) while being successively selected by a selector (d) and analog video signal outputs from the CODEC (e) are successively synthesized and displayed as a synthesized image on one monitor television (g) by the multiple image synthesizer (f) having image storing and synthesizing functions. Since the image synthesized and displayed on the monitor television (g) is converted into digital data by the CODEC (e) and the digital data are distributed to respective NCUs (c) and transmitted to the monitor televisions of local devices through the line network (a), all conference attendants advance the conference while observing mutual screens.