其变换矩阵的基向量很近似于托伯利兹矩阵的特征向量，而托伯利兹矩阵又体现了人类语言及图像信号的相关性。因此，DCT常常被认为是语音与图像信号变换的准最佳变换。-The transformation matrix of the basis vectors is approximate to the Vento Belize matrix eigenvectors, and the support matrix of Belize and reflects the relationship betwe