Device and method for conversion into a transformed representation or for inversely converting the transformed representation,申请号AU20040300713-传众专利搜索

Device and method for conversion into a transformed representation or for inversely converting the transformed representation

申请公布号：AU2004300713(A1)

申请号：AU20040300713

申请日期：2004.07.05

申请公布日期：2005.01.20

申请人：

FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人：RALF GEIGER;GERALD SCHULLER;THOMAS SPORER

分类号：G06F17/14;G10L19/00;G10L19/02;H04N7/30;(IPC1-7):G06F17/14;G06T9/00

主分类号：G06F17/14

摘要：For converting first and second blocks of discrete values into a transformed representation, the first block is transformed according to a first transformation rule and then rounded. Then, the rounded transformed values are summed with the second block of original discrete values, to then process the summation result according to a second transformation rule. The output values of the transformation via the second transformation rule are again rounded and then subtracted from the original discrete values of the first block of discrete values to obtain a block of integer output values of the transformed representation. By this multi-dimensional lifting scheme, a lossless integer transformation is obtained, which can be reversed by applying the same transformation rule, but with different signs in summation and subtraction, respectively, so that an inverse integer transformation can also be obtained. Compared to a separation of a transformation in rotations, on the one hand, a significantly reduced computing complexity is achieved and, on the other hand, an accumulation of approximation errors is prevented.