Compressed image data received by a receiving circuit 11 is stored once in a buffer memory 12. When the quantity of the compressed image data in the buffer memory 12 reaches a predetermined quantity (for example, a quantity corresponding to one-fourth of compressed image data corresponding to one frame),...http://www.google.com.tw/patents/US5363138?utm_source=gb-gplus-share專利 US5363138 - Image signal reproducing apparatus for partially reproducing image to be displayed
