期刊名称：International Journal on Electrical Engineering and Informatics
印刷版ISSN：2085-6830
出版年度：2011
卷号：3
期号：2
出版社：School of Electrical Engineering and Informatics
摘要：This paper studies finite word-length effects on two different VLSI architectures of integer discrete wavelet transforms (DWT). The two DWT architectures representing two extreme cases are Scheme 1: basis correlation, and Scheme 2: pyramidal algorithm. For signal-to-noise ratio (SNR) evaluations, we consider various values of the length of integer word (W). Our experiments show that W is critical for both schemes, although both schemes perform almost equivalently. We also show that Scheme 1 and Scheme 2 have computational complexities ????? and O(N), respectively. The paper concludes that the word length W has similar critical impacts on the quality of integer DWT of both Schemes, hence Scheme 2 should be used based on lower computational complexity reason.
