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].

• DCTFwdInitAlloc
  Allocates memory and initializes the forward DCT structure.
• DCTInvInitAlloc
  Allocates memory and initializes the inverse DCT structure.
• DCTFwdFree
  Closes the forward DCT structure.
• DCTInvFree
  Closes the inverse discrete cosine transform structure.
• DCTFwdGetBufSize
  Computes the size of the forward DCT work buffer.
• DCTInvGetBufSize
  Computes the size of the inverse DCT work buffer.
• 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.
• DCT4InitAlloc
  Allocates memory and initializes the DCT-IV structure.
• DCT4Free
  Closes the DCT-IV structure.
• DCT4Init
  Initializes the DCT-IV structure.
• DCT4GetSize
  Computes the size of the DCT-IV specification structure.
• DCT4
  Computes the DCT-IV of a signal.

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