Fast Implementation of 2D DCT/IDCT Based on Loeffler''''s Algorithm
一种基于Loeffler算法的快速实现2D DCT/IDCT的方法*

This paper presents a new Loeffler algorithm-based approach to two dimensional forward and Inverse Discrete Cosine Transform(2D DCT/IDCT) for image compressions.The 2D DCT/IDCT is implemented by two times of 1D DCT/IDCT due to the separability of the 2D DCT/IDCT.After the number of clock cycle has been properly lengthened and the operations during the cycle simplified,the 1D DCT/IDCT can be executed within 8 clock cycles at high speed.Experimental results show that our design cuts down 10% of hardware cost and saves 10% of time compared with some similar commercial IP cores.