Digital filter realizations
After the coefficients of a digital filter have been determined, the approximation problem is solved. The next stage of the filter design process is called realization or implementation of the filter. When we talk about realization here, we are talking about a structure that relates the input and output of the filter, illustrated by block diagrams. They are called filter structures. The blocks within these block diagrams can be implemented either as a piece of digital hardware or as a program to be executed by a DSP chip.
We shall describe several filter structures. Considerations for the choice of a filter structure include ease of programming on a particular DSP chip, and the regularity of the VLSI (very large ...
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