| 摘要 |
A rate dual ports buffer is provided for writing a set of N x N word data block at a first speed, after adjusting the data block, before delivering first one-dimensional data at a second speed. A selector has two input ports among which one port is coupled to the rate dual ports buffer for supplying the first one- dimensional data flow in the fist time period, and supplying the second one-dimensional data flow from another input port in a second time period. A one-dimensional DCT/IDCT operator is coupled to the selector for operating the one-dimensional data supplied from the selector. A row-column transpose buffer is coupled to the DCT/IDCT operator for transposing the first one-dimensional data after the DCT/IDCT operation and forming the second one-dimensional data to the selector. An inverse rate dual ports buffer coupled to the DCT/IDCT operator delivers the second one- dimensional data after the DCT/IDCT operation at the first speed.
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