19.Define discrete cosine transform.

19.Define discrete cosine transform.

   December 28, 2013       legend

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 The 1-D discrete cosine transform is defined as

For u = 0, 1, 2, . . , N-1. Similarly the inverse DCT is defined as

 

For u = 0, 1, 2, . . , N-1

Where α is

 

 The corresponding 2-D DCT pair is

 For u, v = 0, 1, 2, . . , N-1, and

For x, y= 0, 1, 2, . . , N-1

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