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Implementation of Pipeline 2D-DCT for MPEG Compres
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The 2-D DCT transforms a block of N x N pixels from the spatial domain into the frequency domain. Before compression, image data in memory is divided into several blocks. Each block consists of 8x8 pixels. Fig. 2 shows that in the resulting coefficient block, the coefficient in the top left corner represents the DC component or average brightness of the pixel block. Moving to the right the coefficients represent increasing horizontal spatial frequency. Moving down, the coefficients represent increasing vertical spatial frequency. The coefficient in the bottom right hand corner represents the highest diagonal frequency. Because of its advantage in image compression, is an interesting research subject that invite many researcher, and others to participate in. That makes many algorithms of DCT is developed.
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