PERALATAN PENGKODAAN CITRA, PERALATAN PENGKODEAN CITRA, METODE PENGKODEAN CITRA, METODE PENDEKODEAN CITRA DAN MEDIA PENYIMPAN DATA

摘要

An image coding apparatus which performs an adaptive coding process in macroblock units each Comprising a predetermined number of pixels into which the image space is divided, comprises: a color motion vector coding unit for coding either a frame-basis color motion vector or a field-basis color motion vector of a target macroblock to be coded which is used in either the frame-by-frame motion compensation coding process or the field-by-field motion compensation coding process for an interlaced color signal, based on its prediction value; and a shape motion vector coding unit for coding a frame-basis shape motion vector of the target macroblock which is used in the frame-by-frame motion compensation coding process for an interlaced shape signal, based on a prediction value obtained from a color motion vector and a shape motion vector of a coded macroblock; wherein the color motion vector coding unit includes motion vector conversion means for converting field-basis color motion vectors of the coded macroblock into a frame-basis color motion vector of the coded macroblock; and the shape motion vector coding unit includes a shape motion vector predictor for generating a prediction value of the shape motion vector of the target macroblock based on the frame-basis shape motion vector of the coded macroblock and the frame-basis color motion vector of the coded macroblock output from the motion vector conversion means when the color motion vector of the coded macroblock is the field-basis motion vector.