Cost-Effective Hardware Sharing Architectures of Fast 8Ã\x978 and 4Ã\x974 Integer Transforms for H.264/AVC

In this paper, the novel hardware sharing architectures are proposed for realizations of fast 4times4 and 8times8 forward/inverse integer transforms in the H.264/AVC. Based on matrix factorizations, the cost-effective architectures for fast one-dimensional (1D) 4times4 and 8times8 forward/inverse integer transforms can be derived through the Kronecker and direct sum operations. By applying the concept of hardware sharing, the proposed hardware schemes for fast integer transforms need less number of shifters and adders than the direct realization architecture, where the direct architecture just implements the individual 4times4 and individual 8times8 integer transforms independently. With low hardware cost and regular modularity, the proposed hardware sharing architectures are suitable for VLSI implementations to accomplish the H.264/AVC signal processing