Inverse transformation apparatus for use in audio/video codec, has inverse transformation unit selecting one of ROM tables, where unit inversely transforms data with reference to selected table

摘要

The apparatus has an inverse transformation unit (10) selecting one of ROM tables in consideration of a format of an input data. The unit inversely transforms the data with reference to the selected table. The unit simultaneously processes a total of data in parallel regardless of an input data format. The unit has a transpose operation unit (20) performing a transpose operation on the data. Independent claims are also included for the following: (A) an audio and/or video codec comprising an inverse transformation apparatus and supporting multiple data formats (B) an inverse transformation method used in an audio and/or video codec.