| 摘要 |
<p>In an apparatus for performing motion estimation (ME) on a block of NxM pixels in a current frame based on a predetermined reference frame (RF), a block divider divides the block into subblocks (SB's) of KxL pixels and then classifies the SB's into A-group SB's and B-group SB's in accordance with the rule that all of the SB's in a same group be diagonally adjacent to each other. A first and a second decision circuits decide pixels satisfying a first and a second predetermined conditions among the pixels in the ASB's as A-group representative pixels (ARP's) and in the BSB's as B-group representative pixels (BRP's), respectively, wherein the first predetermined condition is different from the second predetermined condition. A sample block generator combines the ARP's with the BRP's to generate a sample block. And then, RF subsampling circuit generates a sample RF (SRF) by subsampling the predetermined RF in accordance with the same subsampling method described above. A best matching candidate block (CB) detector, based on the sample block and the SRF, detects a CB having a smallest error value to the sample block among CB's within the SRF as a best matching CB (BMCB) by using a predetermined block matching method. And a motion vector (MV) generator generates a MV representing a displacement between the sample block and the BMCB.</p> |
