小波的秘密：多分辨率分析与连续小波变换（第5版）

1.如何理解时间分辨率和频率分辨率？

In this section we will take a closer look at the resolution properties of the wavelet transform. Remember that the resolution problem was the main reason why we switched from STFT to WT.
The illustration in following Figure is commonly used to explain how time and frequency resolutions should be interpreted. Every box in following Figure corresponds to a value of the wavelet transform in the time-frequency plane. Note that boxes have a certain non-zero area, which implies that the value of a particular point in the time-frequency plane cannot be known. All