An MPEG downdecoder is to be provided which eliminates dephasing of pixels of moving picture data without losing properties inherent in a picture obtained on interlaced scanning. If an interlaced picture is inputted, and the DCT mode is the field mode, an interlaced picture accommodating picture decoding...http://www.google.fr/patents/US6748018?utm_source=gb-gplus-shareBrevet US6748018 - Picture decoding method and apparatus