A transmission system comprises a transmission channel, a transmission error value monitor and a controller. The transmission channel is arranged to carry data between a transmitter and a receiver/decoder, each communicably interfaced with the transmission channel. The transmission error value monitor is communicably interfaced with the receiver/decoder to periodically monitor for Measured transmission Error Values MEVs of such characteristics, magnitude, and/or frequency of occurrence over time, as to represent transmission errors detected on the transmission channel. The MEVs are periodically monitored after training and initialization on the receiver/decoder. The MEVs are selected from a group comprising: a bit error rate, errored seconds, errored minutes, code violations over a fixed period of time, Signal-to-Noise Ratio (SNR) measured at the receiver/decoder, and Transmission Control Protocol and Internet Protocol (TCP/IP) throughput. The transmission error value monitor is further arranged to generate an input signal based on the transmission errors detected on the transmission channel based on the MEVs. The controller is coupled with the transmitter to receive the input signal from the transmission error value monitor and to further generate control signals that instruct the transmitter and/or the receiver/decoder coding-related components to adjust their operation by changing at least an N codeword parameter outside of an interleaver of the transmission system, wherein the N codeword parameter represents a number of bytes per data frame.