The present invention provides a method for comprising data by determining a central value that is greater than the minimum value and less than the maximum value of the range of data. In one embodiment, the central value is chosen to be a value that substantially reduces a decoding error in the event...http://www.google.co.uk/patents/US7224838?utm_source=gb-gplus-sharePatent US7224838 - Method and apparatus for recovery of encoded data using central value
