ERROR-CORRECTION MULTIPLEXING APPARATUS; ERROR-CORRECTION DEMULTIPLEXING APPARATUS; OPTICAL TRANSMISSION SYSTEM USING THEM; AND ERROR-CORRECTION MULTIPLEXING TRANSMISSION METHOD

摘要

A first demultiplexer (11) and a second demultiplexer (12) receive and demultiplex STM-64 data to generate parallel data. A FEC frame generating encoder (13) carries out error correction encoding operation in a column direction of the parallel data that constitutes a matrix, adds a resulting error correcting code to the parallel data, carries out error correction encoding operation in a row direction of the parallel data, and further adds a resulting error-correcting code to the parallel data. A first multiplexer (14) and a second multiplexer (15) multiplex the error-correction-encoded parallel data, and output the data as a FEC frame.