基于C6748DSP的5／3小波变换算法的低功耗优化方法

摘要

在JPEG2000算法中，采用5／3小波滤波来进行对图像块的无损压缩变换。本文讨论在DSP嵌入式平台上对5／3小波滤波器的低功耗优化技术。本文采用TI公司的TMS320C6748DSP处理器，详细阐述了几种针对DSP芯片体系结构的低功耗处理技术，主要包括循环分解、循环展开、循环嵌套、循环转置等循环优化方法及编排流水线等方法。通过上述方法综合应用到滤波算法的优化过程中，能够明显降低系统开销。%The JPEG2000 algorithms use 5/3 wavelet filter to realize lossless compression transformation for the image block. This article discusses the low power consumption optimization techniques for 3/5 wavelet filters based on DSP embedded platform. And elaborates several low power consumption process techniques for TMS320C6748 DSP chip architechture in details, including cycle optimization methods and arragement pipeline such as cycle decomposition,loop unrolling, loop embed, loop transposition,etc. Significantly reduces system energy cost using these methods in optimization for filters algorithm.