子带内运动补偿时域滤波的优化  

Optimization of in Band Motion Compensated Temporal Filtering

作　　者：李俊[1] 刘晓冬[1] 

机构地区：[1]清华大学深圳研究生院,广东深圳518055

出　　处：《控制工程》2006年第S2期96-99,共4页Control Engineering of China

摘　　要：在用提升算法实现子带内运动补偿时域滤波时,为了提高运动模型的有效性,探索了利用多假设预测技术以改善运动补偿。提出了更新算子的优化设计,以提高低码率下视频编码的可扩展性,并取得改善的重建视频质量。实验结果显示,优化的子带内运动补偿时域滤波,在保证运动估计精度下,通过合理选择时间滤波器,结合改善的提升实现中的更新操作,提高了编码系统的编码效率和可扩展性能。In scalable wavelet video coding scheme,motion compensated temporal filtering is an effective approach to remove temporal correla- tion between frames.By applying lifting implementation of in hand MCTF,multi-hypothesis technology is exploited to improve the efficiency of motion compensation under motion model.An optimized update operator in lifting implementation is proposed to improve scalability under low bit rate and the quality of reconstructed video.Experiments show motion estimation accuracy can be assured in the proposed system.And the ap- propriate selection of temporal filter and optimization of update operation in lifting,make efficiency and scalability of video coding improved.

关 键 词：可扩展视频编码 运动补偿时域滤波 提升实现 更新算子 

分 类 号：TN713[电子电信—电路与系统]