DSP processors hit the mainstream

TLDR

Digital signal processing has moved from niche to mainstream, appearing on a growing range of consumer products as fabrication advances have lowered costs and increased performance, distinguishing DSP processors from general‑purpose CPUs. The paper investigates why DSP processors are booming and provides an explanation of their functions along with a practical guide for evaluating them in product design. The study finds that widespread adoption of DSP processors is driving demand for faster, smaller, cheaper, and more energy‑efficient chips.

Abstract

These days, the once obscure engineering term "DSP" (digital signal processing) is working its way into common use. It has begun to crop up on the labels of an ever wider range of products, from home audio components to answering machines. This is not merely a reflection of a new marketing strategy, however; there truly is more digital signal processing inside today's products than ever before. But why is the market for DSP processors booming? The answer is somewhat circular: as microprocessor fabrication processes have become more sophisticated, the cost of a microprocessor capable of performing DSP tasks has dropped significantly to the point where such a processor can be used in consumer products and other cost sensitive systems. As a result, more and more products have begun using DSP processors, fueling demand for faster, smaller, cheaper, more energy-efficient chips. Although fundamentally related, DSP processors are significantly different from general purpose processors (GPPs) like the Intel Pentium or PowerPC. The authors explain what DSP processors are and what they do. They also offer a guide to evaluating DSP processors for use in a product or application.