Digital Signal Processing is designed for the students of engineering and arts and science colleges of various universities in India. An easy-to-understand text with crisp but complete explanation of topics will enable the students to understand the basic concepts easily. This book is organized with 12 chapters. The concepts of discrete time signals and their transforms are organized in four chapters and two chapters are devoted for digital filter design. One chapter is devoted to each topic in digital signal processing like finite word length effects, multirate DSP, spectrum analysis, digital signal processors and applications of DSP. Considering the highly mathematical nature of this subject, more emphasis has been given to problem-solving methodology. Each chapter provides the foundation and practical implications with a large number of solved numerical examples for better understanding.