(An) implementation of the real-time discrete cosine transform for MPEG-2 in KAIST image computing system (KICS)

Abstract

A fast scaled discrete cosine transform algorithm is proposed for a real-time discrete cosine transform in the KAIST Image Computing System (KICS). The KICS is a high-performance image-computing system with a parallel architecture, in which multiple general-purpose digital signal processors(DSP) are used. To implement the real-time MPEG-2 encoder on the KICS, a three-step computation of the proposed algorithm reduces total number of multiplications. In addition, the software architecture of the KICS is presented for an implementation of the real-time MPEG-2 discrete cosine transform. The performance of the proposed algorithm is evaluated with respect to the execution time of the forward and inverse discrete cosine transform of the MPEG-2 encoding, and the simulation results of the proposed algorithm are also described. The simulation results and the performance analysis show that the proposed algorithm can perform the MPEG-2 encoding in real-time