Patent ID: 8271852

Claim:
A method of transmitting data in a line signal to enable subsequent recovery of corrupted data, the corrupted data having been corrupted by repetitive noise events having one or more timing characteristics, each timing characteristic having a respective predicted value from which the occurrences of such noise events are predicted, the line signal comprising a series of data frames, the method comprising, for each predicted noise event: determining a group comprising one or more frames in said line signal, said group being coincident with the predicted value of the timing characteristic for a said predicted noise event; and determining one or more frames within the coincident group which will have their data corrupted due to coincidence with said predicted noise event; and transmitting sufficient redundant data in the line signal instead of said frames whose data would be corrupted due to coincidence with said predicted noise event to enable recovery of data lost from one or more adjacent frames in said line signal, if at least one timing characteristic differs from its respective predicted value for at least one noise event.