Discrete Wavelet Transform，[1]离散小波变换是指在特定子集上采取缩放和平移的小波变换，是一种兼具时域和频域多分辨率能力的信号分析工具。此变换运用可以缩放平移的小波代替固定的窗进行计算分析，主要应用于信号编码和数据压缩-Discrete Wavelet Transform, [1] the discrete wavelet transform is adopted in a specific subset of the zoom and pan on the wavelet transform is a time-domain and frequency domain of both multi-resolution capability of the signal analysis tools. This transformation can be scaled using shift instead of a fixed window of wavelet analysis to calculate, mainly used in signal coding and data compression