摘要
本文提出了利用离散小波框架结合软阈值的方法对超声多普勒信号进行降噪。通过对模拟多普勒信号和临床信号的降噪实验 ,发现利用小波框架的降噪方法可以获得比标准正交小波变换的降噪方法更好的降噪效果。
A novel method for Doppler ultrasound signal denoising was presented in this paper. In this method, the wavelet frame analysis was used together with the soft thresholding algorithm. From the simulation studies and clinical cases, it was found that this method has a better performance than that by using the standard orthogonal wavelet transform (OWT).
出处
《声学技术》
CSCD
2000年第4期197-200,共4页
Technical Acoustics
基金
国家自然科学基金项目(39800137)资助课题
关键词
小波变换
框架
软阈值
降噪
wavelet transform
frame
soft threshold
denoise
