AN IDCT ALGORITHM FOR MPEG
Zhou Tin · Chinese Journal of Computers · 1997
DCT/IDCT is extensively used in image coding systems. This paper proposes a new IDCT algorithm for MPEG decoding based upon the properties of MPEG. By the use of the distribution characteristics of DCT coefficients and symmetrical properties of IDCT, a single structure is applied to calculate the different coefficients. This method results in a considerable reduction in the implementation complexity. The simulation result shows that the reduction is up to 2/3, only with 14 percent loss of speed.