An approximate kernel for the discrete cosine transform (DCT) of length 4 is derived from the 4-point DCT defined by the High Efficiency Video Coding (HEVC) standard and used for the computation of DCT and inverse DCT (IDCT) of power-of-two lengths. There are two reasons for considering the DCT of length 4 as the basic module. First, it allows computation of DCTs of lengths 4, 8, 16, and 32 prescribed by the HEVC.

Filename	Size	Update
5d2186698c1d9087c61d5bbf51ba0015	2119680	2017-12-25

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