In this paper, a lossless frame recompression scheme based on a parallel multi-resolution motion estimation (PMRME) architecture for reducing DRAM (Dynamic Random Access Memory) bandwidth is presented. The basic structure of the scheme which includes the leveling memory organization, the leveling data fetching strategy is proposed. Furthermore, an adaptive DPCM (Differential Pulse Code Modulation) scanning order selection based on each level is used and an efficient coding method is also applied for these DPCM values. The experimental results show a 40% saving of bandwidth on 720p and 1080p sequences.%提出一种基于同步分层运动估计的无损参考帧压缩方法[1].该方法的基本结构包括:分层的记忆存储结构和分层两步式数据提取的策略.同时,该方法应用了一种基于分层的适应性差值扫描方式选择方法以及一种有效的可变长编码方法.根据实验结果,本方法可以有效减少分层运动估计算法40％的带宽.
展开▼
