摘要
提升算法的推出使得离散小波变换硬件的快速实现成为可能。翻转结构在提升架构的基础上进一步提高运算速度。在此,对翻转结构的舍入误差进行了分析,在翻转结构的基础上,对提升步骤进行了合并,提出一种有效的DWT硬件实现方案。实验结果表明,通过采用流水线模式提出的这种硬件结构,在关键路径约束的条件下,可以充分利用硬件资源。
The introduction of lifting scheme makes the fast hardware implementation of DWT come true. The flipping structure speeds up further the computation for lifting-based architecture. The roundoff error of the flipping structure is analyzed. Based on the flipping structure, the lifting step is modified and an efficient hardware structure for DWT derived from flipping structure is proposed. Experimental results show that the proposed structure, which adopts the pipeline design, could effectively make full use of the arithmetic resources under the condition of the tight critical path.
出处
《现代电子技术》
2010年第18期124-126,130,共4页
Modern Electronics Technique
关键词
离散小波变换
提升算法
翻转结构
舍入误差
discrete wavelet transform
lifting scheme
flipping structure
roundoff error
