## An Introduction to Information Theory

An Introduction to Information Theory. Instructor: Prof. Adrish Banerjee, Department of Electrical Engineering, IIT Kanpur. Information Theory answers two fundamental questions: what is the maximum data rate at which we can transmit over a communication link, and what is the fundamental limit of data compression. In this course we will explore answers to these two questions. We will study some practical source compression algorithms. We will also study how to compute channel capacity of simple channels.
(from **nptel.ac.in**)

Lecture 05 - Block to Variable Length Coding: Prefix Free Code |

In this lecture, we describe the problem of block to variable length coding. We explain what is meant by uniquely decodable codes and present the test for uniquely decodability. We also describe prefix free code and derive the conditions for existence of a prefix free code (Kraft's inequality).

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