Patent ID: 7428669

Claim:
A controller for an adaptive Forward Error Correction (FEC) coder using a Codeword Composition Ratio (CCR), wherein the FEC coder is used in a Digital Subscriber Line (DSL) modem in which a transmitter sends data via a channel using FEC coding and interleaving according to an original transmission latency, wherein the controller comprises: means for repeatedly acquiring Measured transmission Error Values (MEVs) representing impulse noise events detected on the channel, the MEVs acquired after training and initializations on the DSL modem, wherein the means is coupled with the DSL modem; means for analyzing the acquired MEVs relative to a Target transmission Error Value (TEV), wherein the analyzing means is coupled with the acquiring means; and means for generating a CCR adjustment control signal during normal operation of the DSL modem (“SHOWTIME”) responsive to the means for analyzing, and transmitting the same to the DSL modem, wherein the generating means is coupled with the analyzing means.