一种访存带宽优化方法的研究与实现
摘要
作为H.264/AVC解码过程中耗时最多的环节,运动补偿从SDRAM中读取参考帧像素用于帧间预测,所消耗的带宽成为制约性能的瓶颈之一。基于2D Cache的访存优化方案,针对DDR类型的SDRAM,在运动补偿的访存通路上增加了一个2D Cache。实验结果表明,在帧,场和混合模式下,该2D Cache方案提高了Cahce命中率,降低了访存带宽。摘要内容(包括目的、方法、结果和结论四要素)
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