Chapter 7

Digital Filters Using Frames


7.1      Theory

AS discussed in Chapter 6, using frame-based processing greatly increases the efficiency of DSP programs. The CPU performing the signal processing algorithm is only interrupted at the end of a frame rather than at every sample. In this chapter, we will show how frames can be used for time-domain digital filtering similar to the filters we discussed in Chapter 3.

Recall that a time-domain implementation of a digital filter involves an iterative calculation of the filter’s difference equation. The only change in this chapter is that we will be dealing with our samples a frame at a time rather than a sample at a time. For simplicity, we will restrict this discussion to FIR filters, but ...

Get Real-Time Digital Signal Processing from MATLAB to C with the TMS320C6x DSPs, 3rd Edition now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.