| 摘要 |
A data processing system transforms an input matrix with transform coefficients through an inverse discrete cosine transform procedure, and it consequentially obtains an output matrix. The input matrix comprises 2<SUP>N</SUP>x2<SUP>N </SUP>of discrete cosine transform coefficients, and the output matrix comprises 2<SUP>N</SUP>x2<SUP>N </SUP>of output data; both are sequentially indexed by the row and column index. The output matrix is obtained by summing up a plurality of partial output matrixes; each partial output matrix comprises a first partial sub-output matrix and at least one other partial sub-output matrix. The first partial sub-output matrix comprises a plurality of partial output data that has a predetermined symmetry characteristic. The partial output matrixes possess a number of symmetry relations. The first and other partial sub-output matrixes of each partial output matrix have one symmetry relation. The data processing system comprises a system controller, a calculating unit, a symmetry duplicator, a summation device and four summed partial sub-output matrix register.
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