![]() ![]() The approximate 3D DCTbased proposed system performs similarly to the original exact 3D DCT-based method. ![]() The proposed 3D approximations were also employed as a tool for visual tracking. The simulation results showed that the approximate 3D DCT coding methods offer almost identical output visual quality when compared with exact 3D DCT scheme. The proposed approximations were embedded into 3D DCT-based video coding scheme and a modified quantization step was introduced. The proposed methods complexity cost was assessed, presenting considerably lower arithmetic operations when compared with the exact 3D DCT. Several multiplierless 8 ˆ 8 ˆ 8 approximate methods are proposed and the computational complexity is discussed for the general multidimensional case. The formulation is extended to higher dimensions with arbitrary lengths. Three dimensional DCT (3D DCT) approximations are formalized in terms of high-order tensor theory. In this paper, we introduce low-complexity multidimensional discrete cosine transform (DCT) approximations. ![]()
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May 2023
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