| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the circuit scale of a discrete cosine transformation(DCT) device. SOLUTION: One column or one row required in one-dimensional DCT in the direction of the row or column, which is performed in the second time, is transformed by one-dimensional DCT performed in the direction of the row or column with respect to M×N-pieces of data f(x, y), N-pieces in the row direction and N-pieces in the column direction. In one-dimensinoal DCT performed in the second time, one-dimensional DCT is performed from data of one column or one row, N-pieces of transformation coefficients in one column or M-pieces in one row are outputted, and the accumulation of data between one-dimensional DCT for the first time and the second time is set to be the data buffer of N-pieces in one column×k bits or M-pieces in one row×k-bits.</p> |
