VIDEO ENCODING DEVICE AND VIDEO ENCODING PROGRAM

PROBLEM TO BE SOLVED: To provide a video encoding device which can be packaged in hardware by making search computational complexity with respect to an encoded block uniform by performing a search while determining a reduction ratio of a picture of an input video signal and a reference image of a decoded video signal and a search range on a pre-stage of search processing.SOLUTION: A video encoding device comprises: reduction means for performing reduction processing on a picture of an input video signal and a reference image of a decoded video signal of a motion prediction destination while using a predetermined reduction ratio; and vector determination means for determining a motion vector by performing motion prediction processing while using an encoded block of the reduced picture of the input video signal and a search region of the reference image of the decoded video signal. The reduction means calculates dispersion values of motion vector components after applying scaling processing for aligning temporal distances of motion vectors to the motion vectors of pictures that are encoded just before the picture of the input video signal, and performs the reduction processing on the picture of the input video signal and the reference image of the decoded video signal in a reduction ratio corresponding to the dispersion values.SELECTED DRAWING: Figure 1 【課題】探索処理よりも前段階で入力映像信号のピクチャと復号映像信号の参照画像の縮小比率と探索範囲を決定して探索を行うことにより、符号化ブロックに対する探索演算量を均一にしてハードウェア実装可能な映像符号化装置を提供する。【解決手段】入力映像信号のピクチャと動き予測先の復号映像信号の参照画像を所定の縮小比率を用いて縮小処理を行う縮小手段と、縮小した入力映像信号のピクチャの符号化ブロックと復号映像信号の参照画像の探索領域とを用いて動き予測処理を行い、動きベクトルを決定するベクトル決定手段と、を備え、縮小手段は、入力映像信号のピクチャの直前に符号化を行ったピクチャの動きベクトルに対して動きベクトルの時間的距離を揃えるためのスケーリング処理を施した後に動きベクトル成分の分散値を算出し、分散値に応じた縮小比率で、入力映像信号のピクチャと復号映像信号の参照画像とを縮小処理する。【選択図】図１