摘要
讨论了信号子波变换的模极大值表示信号和恢复信号中采用冗余二进子波变换的必要性.分析了过零点表示和模极大值表示的关系,提出了冗余二进子波变换在交替投影的恢复算法中的必要性,改进了仿射投影以消除多余的振荡。
The necessity of the redundant dyadic wavelet transform in signal representation and reconstruction is discussed. The relationship between the zero crossing representation and the modulus maxima representation is analyzed.We stated that the redundancy of the dyadic wavelet transform is necessary in the alternating projection reconstruction, and the affine projection is modified to suppress spurious oscillations.Results of computer simulation are also given.
出处
《北京邮电大学学报》
EI
CAS
CSCD
1996年第4期81-85,共5页
Journal of Beijing University of Posts and Telecommunications
基金
邮电部青年基金
关键词
信号处理
信号恢复
子波变换
signal processing
signal reconstruction
wavelet transform