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Integer Discrete Cosine Transform (DCT) is among the techniques used to improve the performance of the H.264/AVC Standard. All the profiles in the H.264/AVC standard support 4x4 integer DCT and the high profiles of this standard support 8x8 integer DCT as well as the 4x4 integer DCT. Various hardware realizations have been proposed for forward and inverse integer DCT in the literature because they are among the computational intensive units in the H.264/AVC standard. In this paper the authors propose a unified pipelined architecture to realize of the entire forward and inverse DCTs as well as the Hadamard transforms in the H.264/AVC encoder.
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