Discrete Cosine Transform Functions

This section describes the functions that compute the discrete cosine transform (DCT) of a signal. DCT functions used in the Intel IPP signal processing data-domain implement the modified computation algorithm proposed in [Rao90].

• DCTFwdInit
  Initializes the forward discrete cosine transform structure.
• DCTInvInit
  Initializes the inverse discrete cosine transform structure.
• DCTFwdGetSize
  Computes the size of all buffers required for the forward DCT.
• DCTInvGetSize
  Computes the size of all buffers required for the inverse DCT.
• DCTFwd
  Computes the forward discrete cosine transform of a signal.
• DCTInv
  Computes the inverse discrete cosine transform of a signal.