Transitional Note

We have now finished reviewing the fundamentals of digital waveguide networks. On the more practical level of the implementation of DWNs, there are many more topics which deserve elaboration, including strategies for reducing the numbers of delays, and also various normalization techniques which can be used to vary the number of required arithmetic operations. In this last respect, we note that it is possible to establish formal links between chains of bidirectional delay lines and other similar filter designs such as the normalized ladder form [80], etc. We refer the reader to [166] for an in-depth treatment.