| 摘要 |
Methods, systems, and computer programs for determining motion vectors in a motion-compensated video compression system. In one aspect, multiple fast motion estimation methods are applied to a set of video images, with the best result from all the matches selected for use in compression (Figure 1). Both AC and DC motion vector match criteria can be applied. In addition to full-pixel searches commonly used by these methods, sub-pixel searches can also be performed for each candidate motion vector, using both AC and DC match criteria. Further, hydrid combinations of full-pixel and sub-pixel fast searches can be used. |
