DISTRIBUTED ARITHMETIC PROCESSING APPARATUS AND METHOD AND TWO-DIMENSIONAL DISCRETE COSINE TRANSFORM PROCESSING APPARATUS AND METHOD USING THE SAME

摘要

PURPOSE: A distributed arithmetic processing apparatus and method and a two-dimensional discrete cosine transform processing system and method using the same are provided to reduce power consumption. CONSTITUTION: A discrete cosine transform processing system includes a multiplexer(201) for selecting one of an external input and an input from a transposition memory, the first converter(202) for converting serial data output from the multiplexer into parallel data, and a storage for loading the data output from the first converter in parallel to temporarily store the data. The system further includes an operation unit for performing operations required for discrete-cosine-transform /inverse-discrete-cosine-transform of the data output from the storage, a zero input detector for checking data inputted to the operation unit to pass the data without passing through a part of modules of the operation unit when all of predetermined input bits are "0", and the second converter for converting parallel data output from the operation unit into serial data. The system also includes a rounding and clipping module(233) for carrying out rounding and clipping in order to output the data output from the second converter.