DCT变换及IDCT变换，为较为常用的变换，在许多信号处理中经常使用。

用java实现二维dct变换及其idct逆变换，-The realization of two-dimensional transform and its inverse transform dct

应用Visual DSP++软件，各种指令，调试的过程和子函数的调用等，实现DCT变换与反变换。-Application of Visual DSP++ software, various instructions, the process of debugging and Functions of the call, etc., to achieve DCT transform and inverse transform.

图像的DCT余弦变换（频谱变换），包括IDCT变换以及反变换。经过测试修改源代码中的笔误。包括理论。-Image DCT cosine transform (spectrum transform), comprising IDCT transform and inverse transform. Tested modify the source code of a clerical error. Including theoretical.