In the design of JPEG coder, the modified Loeffler FDCT algorithm is applied, the problem of time parallel is resolved with pipeline optimization structure, and the speed of DCT module is accelerated.

• 在JPEG编码器设计中，采用改进的Loeffler快速离散余弦变换算法，用流水线结构解决时间并行性问题，提高了离散余弦变换模块的运算速度；