The Gabor systems that we studied in the preceding chapter are generated from time-frequency shifts of a single function. A time-frequency shift is a composition of the two simple operations of translation and modulation. Wavelets are likewise generated by two simple operations, this time translation and dilation. A composition of translation and dilation is called a time-scale shift (see the illustration in Figure 12.1), and so a wavelet system is a collection of time-scale shifts of a single function.
CITATION STYLE
Heil, C. (2011). Wavelet Bases and Frames. In Applied and Numerical Harmonic Analysis (pp. 351–425). Springer International Publishing. https://doi.org/10.1007/978-0-8176-4687-5_12
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