Reis, AntónioRocha, José Ferreira daGameiro, AtilioCarvalho, José Pacheco de2019-10-302019-10-302017978-989-654-403-42183-9891http://hdl.handle.net/10400.6/7468This work presents the coder and decoder of block mBnB of the type 7B8B. In the coder 7B8B each block/word of 7 input bits is coded in the block / word of 8 output bits. In the decoder 7B8B happen the inverse, each block of 8 input bits is newly converted in the original block of 7 output bits. The coder injects in the transmission line a number of 1’s sensitively equal to the number of 0’s what guarantees a DC constant component and maximizes the transitions number. The objective is to implement the pair coder and decoder 7B8B so that it improves the transmission quality and increases the information security.engLine codesDigital systemsCommunicationsconference object