摘要
介绍了图像的二维DCT变换原理,分析了Loeffler的DCT变换算法。根据DSP处理器BF533的结构和指令特点,使用汇编语言对DCT算法程序进行优化,并且在BF533实验平台上进行验证。实验结果表明,优化后的代码无论在空间还是在时间上运算效率都得到很大提高。
The principle of two dimensional Discrete Cosine Transform（DCT） is introduced in this paper. The algorithm of Loeffler＇s DCT is analyzed. The algorithm of DCT is performed in assembly according to the structure and characteristics of BF533. The codes mentioned above are run on ADSP-BF533 platform successfully. Experiment results show that optimized codes are more efficiency than before in whatever code store space and code execution time.
出处
《微计算机信息》
北大核心
2008年第17期178-179,287,共3页
Control & Automation
基金
河南省教育厅自然科学研究项目(200510462006)
