| 摘要 |
An apparatus for performing an inverse discrete cosine transform, which reduces the number of operation times of the inverse discrete cosine transform including a row and column priority determining unit 10 for determining a priority direction of an operation at a time when a two-dimensional inverse discrete cosine transform is replaced with at least one one-dimensional inverse discrete cosine transform, one-dimensional inverse DCT operating units 11, 13 connected to the row and column priority determining unit 10 for detecting zero elements and for performing a multiply-addition according to a result of the detection, and a random access memory 12, connected to the one-dimensional inverse DCT operating units 11, 13 for storing a result of the multiply-addition performed by the one-dimensional inverse DCT operating unit 11.
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