👉 In information theory, a codeword is a binary message that can be transmitted over a communications channel. A codeword consists of two bits, typically 0 and 1, which are used to represent the characters or symbols in the message. These bits are separated by a parity check bit (also known as a marker) to ensure that the transmission is correct. The term "codeword" refers to the binary representation of a message, often used in coding theory for data compression and