A Multiple Block-matching Step (MBS) Algorithm for H.26x/MPEG4 Motion Estimation and a Low-Power CMOS Absolute Differential Accumulator Circuit
Tadayoshi Enomoto, Nobuaki Kobayashi, Tomomi Ei · IEICE Transactions on Electronics · 2007
To drastically reduce the power dissipation (P) of an absolute difference accumulation (ADA) circuit for H.26x/MPEG4 motion estimation, a fast block-matching (BM) algorithm called the Multiple Block-matching Step (MBS) algorithm has been developed. The MBS algorithm can drastically improve the block matching speed, while achieving the same visual quality as that of a full search (FS) BM algorithm. Power dissipation (P) of a 0.18-μm CMOS absolute difference accumulator (ADA) circuit employing the MBS algorithm is significantly reduced to the range of about 0.3% tn 12% that of the same ADA circuit adopting ES.