基于SIMD的二维DCT算法快速计算。本文针对二维DCT变换，提出了和媒体指令相适应的数据结构和计算方法。最大限度利用媒体指令的运算能力，在软件设计时避免了数据相关性所带来的性能下降。-SIMD two-dimensional DCT-based fast calculation algorithm. In this paper, two-dimensional DCT transform, and the media put forward a directive to adapt the data structure and calculation method. Maximize the use of the media to the computing power commands in the software design to avoid the data brought about the relevance of performance degradation.