This presentation provides an overview of digital signal processing (DSP). It defines key terms like signal and signal processing and explains the basic principles and components of DSP systems. The presentation notes that DSP has advantages over analog processing like accuracy, flexibility, and ease of operation. It provides examples of DSP applications in areas like audio, communications, biomedicine, and more. In conclusion, the presentation emphasizes that DSP involves manipulating digital numbers using programmed instructions and is widely used in modern applications.