用 FPGA实现了二维离散余弦变换和逆变换，结构设计采用行列分解法，乘法器采用移位求和的方法实现，并且采用流水线结构设计，提高处理核的性能-Using FPGA to achieve the two-dimensional discrete cosine transform and inverse transform, the structural design of the use of the ranks of decomposition, the sum of multipliers us