| 摘要 |
<p>In an apparatus (300) 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 (202) 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 (204, 206) 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 (208) combines the ARP's with the BRP's to generate a sample block. And then, RF sub-sampling circuit (210) generates a sample RF (SRF) by sub-sampling the predermined RF in accordance with the same sub-sampling method described above. A best matching candidate block (CB) detector (220), 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 (222) generates a MV representing a displacement between the sample block and the BMCB.</p> |
