Chapter 1. Why DSP?
The acronym DSP is used for two terms, digital signal processing and digital signal processor, both of which are covered in this book. Digital signal processing is performing signal processing using digital techniques with the aid of digital hardware and/or some kind of computing device. Signal processing can of course be analog as well, but, for a variety of reasons, we may prefer to handle the processing digitally. A digital computer or processor that is designed especially for signal processing applications is called a digital signal processor.
The Need for DSP
To understand the relative merits of analog and digital processing, it is convenient to compare the two techniques in a common application. ...