1. Digital Signal Processor (DSP): It is a microprocessor specialized in performing Digital Signal Processing (DSP) algorithms and techniques. Digital Signal Processors are designed to efficiently perform common digital signal processing tasks such as Multiply Accumulate (MAC), vector arithmetic, and displacement.
2. Digital Signal Processing (DSP): This is a technique and process used to improve or analyze digital or analog signals. Digital signal processing involves a series of operations such as digital filters, Fast Fourier Transform (FFT), modulation, demodulation, and so on. The application areas are very broad and include audio and audio-acoustic processing, radar and sonar, digital communications, image processing, medical imaging devices, and more.
In understanding the above definitions, it is important to note that a "digital signal processor" is an actual hardware device that performs the physical operations that implement "digital signal processing" technology. Digital signal processing is the theoretical and practical methodology used to digitize, filter, analyze, and create signals.
In the advertising world, however, DSP is also often referred to as a "Demand Side Platform," which is a system for buying advertising media inventory to help advertisers and agencies manage, execute and optimize their online advertising strategies. This explanation is quite different from DSPs in the EE space.