Patent ID: 8824552
Filing Date: 2014-09-02
Classification: H04N

Abstract:
1. A motion picture encoding device which selects either interframe coding or intra-frame coding to perform video compression, comprising: a motion compensation error detection unit which detects motion compensation error upon interframe prediction; a detection unit which detects flatness of a macroblock image; and an encoding determination unit which compares the motion compensation error with a product acquired by multiplying the flatness of the macroblock image by a coefficient which increases as a magnitude of a motion vector becomes larger, when the motion compensation error detected by the motion compensation error detection unit is greater than a first value during interframe coding by a macroblock image unit, and selects intra-frame coding if the motion compensation error is greater; wherein the encoding determination unit selects intra-frame coding if a formula [1] is satisfied: where minSAD is a minimum Sum of Absolute Differences obtained by a motion vector search, coefficient a is constant to adjust a contributive factor of the motion vector, coefficient k is constant, function f (mv) is a magnitude of a current macroblock motion vector, and Flat is an amount of flatness.