# Translations:Feedback filters/23/en

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At this point, we will introduce the concepts of minimum delay and maximum delay. A thorough discussion of these concepts is given in Chapter 7. A wavelet is said to be a *minimum-delay wavelet* if it is front loaded, whereas it is said to be a *maximum-delay wavelet* if it is back loaded. The front coefficient in the wavelet is 1, and the back coefficient is *c*. Because all the other coefficients are zero, this wavelet is easy to clarify. If , then the front coefficient is greater in magnitude than the back coefficient, so the wavelet is front-loaded and hence minimum delay. If then the back coefficient is greater in magnitude than the front coefficient, so the wavelet is back-loaded and hence maximum delay.