Data transmission device

摘要

A data transmission device comprises a transmitter device and a receiver device. The transmitter device divides a data string to be transmitted into an original data string requiring protection against code error and a data string requiring no protection. The transmitter device then carries out an error detection code adding operation and error correction coding at a redundancy code rate of 1/N on the original data string to generate a coded data string. The transmitter device divides the coded data string by N, and outputs the N divided coded data strings and the data string requiring no protection on a communication line under a time division multiplexing control. The receiver device receives the N coded data strings and the data string requiring no protection. The receiver device carries out error correction decoding on the N divided coded data strings and a mixed coded data string obtained by mixing the divided coded data strings, and carries out error detection on decoded data strings obtained by the decoding. The receiver device then outputs one of the decoded data strings from which no code error is detected together with the data string requiring no protection. The data transmission device can carry out a data transmission protecting the transmitted data from burst code errors and random code errors without increase of redundancy.