| 摘要 |
An image data processing system reproduces a small-sized picture scaled down from an original picture over a large-sized picture on a screen (36a), and comprises a switching circuit (31a) having an input port supplied with pieces of first video data information indicative of parts of the original picture and distributing the pieces of first video information to a plurality of output ports thereof, respectively, a plurality of line memory circuits (31b1 to 31bn-1) respectively coupled to the plurality of output ports except for one of the output ports and memorizing the pieces of first video information, respectively, and an averaging circuit (31c) coupled to the line memory circuits and to the aforesaid one of the output ports and operative to average values respectively represented by the pieces of first video data information for determining the value of a piece of second video data information indicative of a part of the small-sized picture, thereby preventing the small-sized picture from loss of any part of the images incorporated in the small-sized picture. <IMAGE> |
