Digital Signal Processing is a compulsory subject of study offered to Engineering students of Electrical, Electronics and allied disciplines. Targeted at the undergraduate level, this text has been specially crafted to make the study of the subject easily comprehensible. The text emphasizes on problem-solving methodology, whereby each topic has been supported by a large pool of pedagogy. The theory is crisp and concise and explains the fundamentals of Digital Signal Processing to the first-time user. The treatment of the subject is very much simplified in order to have a thorough understanding of the subject. The textcovers the entire syllabi of most of the Universities in India, particular focus to WBUT. Most of the topics are written in lucid style with suitable examples and figures. Brief introduction to analog signals and systems is given. A topic on Applications of Digital Signal Processing and Digital Signal Processors are also included.