该程序用于验证DC矩阵与AC矩阵之间DCT变换与反变换之间的关系。X=Xdc+Xac 将DC矩阵和AC矩阵分别反变换后变成Xdc和Xac AC矩阵就是将Y[0][0]置为零后的DCT矩阵 DCT=Y=A*X*At-the procedures used to validate DC and AC Matrix between DCT and inverse transform the relationship between. X = Xdc Xac to DC and AC matrix-matrix respectively transform into Xdc and Xac AC matrix is to Y [0] [0] is zero home after the DCT matrix DCT = Y = A * X * At