Implementation of a digital copier using TMS320C6414 VLIW DSP processor

In this paper, we developed real-time image processing programs for a digital copier using a TMS320C6414 CPU. The CPU is good for real-time image processing because of multiple and packed-data processing functional units. However, it needs careful programming to exploit deep pipelining, multiple functional units and packed-data instructions. All the critical functions for the implementation of a digital copier, which include shading correction, X-zoom, 2D filtering, and halftoning, are implemented through assembly programming. Programs using linear assembly programming followed by the assembly optimization in software are compared with the manual assembly coded versions. The results show that explicit disambiguation of memory dependency is most critical for the assembly optimization. The cache miss effects are also evaluated.