Abstract: A stereoscopic image generation apparatus generates a stereoscopic image using MPEG encoded data containing I, B and P pictures. A picture extractor extracts each picture data from the MPEG encoded data. A motion vector generator generates motion vectors individually corresponding to macroblocks in the picture and supplies the generated motion vectors to a motion vector field former. A picture storing unit stores pictures reproducted from the encoded picture data by the picture number K. A motion type determiner determines a motion type corresponding to a current picture using the motion vectors supplied from the motion vector field former. A stereoscopic image generator generates a mixed picture corresponding to the current picture using the previous pictures stored in the picture storing unit and the motion type determined in the motion type determiner and outputs the current picture and the mixed picture.