A fast rate-distortion optimization algorithm for motion-compensated video coding

摘要: A fast optimization algorithm that jointly selects motion vectors (MVs) and quantization levels based on a rate-distortion (R-D) criterion is developed for motion-compensated video coding system. In contrast to an optimal R-D algorithm, which requires performing DCT scalar operations, can be computationally excessive practical applications, the proposed achieves significant complexity reduction by efficiently pruning MV candidates modeling residual bit-rate overall distortion with simple polynomial functions of level given vector. Experimental results indicate our maintains compression performance close while keeping computational conventional heuristic approaches.