The Method to reduce operation in Ladder Network

- The Fast Ladder Network for 2D-Rotation Transform -

Abstract

The Ladder Network with rounding are generally used to realize reversible ransform. The rounding used in Ladder Network is cause of low accuracy of transform. In this report, we propose the method to reduce the amount of rounding and operation in Ladder Network that calculate 2 dimensional rotation transform of 2x2 data. By using this method, it is shown that the Mean Square Error of the new lossless 4x4 2D-DCT is smaller than that of conventional method.