What is discrete memoryless source?

A discrete memoryless source (DMS) is a model in information theory that generates a sequence of symbols from a finite alphabet, where each symbol is produced independently of previous symbols. This means that the probability of generating a particular symbol does not depend on any prior symbols, making the source "memoryless." The behavior of a DMS can be fully described by a probability distribution over the symbols in the alphabet. This model is fundamental in understanding data compression and transmission in communication systems.