| 摘要 |
<p>A prediction mode determining unit of a video encoder comprises a primary evaluative value calculating unit (41) which calculates each primary evaluative value of a plurality of primary evaluative values corresponding respectively to a plurality of 4 × 4 intra-prediction modes with different prediction directions, for each of a plurality of 4.times. 4-pixel blocks, using the motion picture signal as a reference image signal, a secondary evaluative value calculating unit (43) which calculates each of a plurality of secondary evaluative values corresponding respectively to the 4 X 4 intra-prediction modes, by applying to the primary evaluative value, weight summing which uses an evaluation coefficient corresponding to a position of each of the 4.times. 4-pixel blocks, determining unit (44 to 48) which determines a coding prediction mode for each macro-block, using the secondary evaluative values, and coding units which coding the motion picture signal in accordance with the coding prediction mode.</p> |
