Encoding/decoding apparatus and method in a communications system

An apparatus and method for encoding and decoding information for transmission in a communication system for packet data transmission is disclosed. According to a preferred embodiment of the invention, packet data, and a apparatus in a communication system for transmitting the information bit sequence for controlling transmission of the packet data, generating symbols encoding the information bit streams and encoding the encoder and the controller It includes. The encoder outputs the coded symbols by encoding the information bit sequence at a preset coding rate. The controller separates the information bits of the columns frame length and the encoded symbols are output when the first length, some of the frame length of the information bit sequence of the coded symbols when the first small second length greater than the first length symbols and controls the encoder so that the output. Preferably, the controller is a frame length of the information bit sequence is a first when the length and outputs the encoded symbols, the frame length of the information bit sequence is a first length than F times (where, F is a natural number) small claim when the second length and controls the encoder outputs coded symbols of the number determined by dividing the number of the code symbols in the F.