A systematic approach to reduce the system bus load and power in multimedia algorithms

Multimedia algorithms deal with enormous amounts of data transfers and stor age, resulting in huge bandwidth requirements at the off-chip memory and sy stem bus level. As a result the related energy consumption becomes critical . Even for execution time the bottleneck can shift from the CPU to the exte rnal bus load. This paper demonstrates a systematic software approach to re duce this system bus load. It consists of source-to-source code transformat ions, that have to be applied before the conventional ILP compilation. To i llustrate this we use a cavity detection algorithm for medical imaging, tha t is mapped on an Intel Pentium (R) II processor.