An efficient low power motion estimation of a video frame sequence

摘要

The present invention provides a system, method and computer program product for efficient low power motion estimation of a digital video image wherein processing requirements are reduced, the reduction being dependent on the content being processed. The method performs motion estimation of a current video image using a search window of previous video image. The method comprises as a first step the formation of the mean pyramids of the reference macroblock and the search area. This is followed by full search at the lowest resolution. The number of CMVs propagated to lower levels is dependent on the QADE of the current macroblock and the maximum distortion band obtained during training for that QADE value at that particular level. The process of training over a sequence is triggered at the beginning of every sequence. This training technique is required to determine the value of the maximum distortion band for all QADEs of the macroblocks, occurring over the training frames.