Abstract: A system and method for data entry by an operator uses data containing a first component and a second component derived therefrom, wherein the second component has error detection and correction abilities therein. The second component of the entered data is used to detect and correct error in the data entered for the first component. The first and second components are preferably characters (e.g., representing GPS position information) entered via a data entry device, while the second component preferably comprises Hamming code. The detection and correction can be performed after data entry and again after signal transmission.

Abstract: A system for error detection and correction in an interface between two portions of a data processing system is disclosed. The system includes a parity generator in a first portion of the data processing system. The parity generator generates parity bits corresponding to substantially the entirety of bits contained in the interface. The data and parity bits are transmitted across the interface. The system also includes a parity check in a second portion of the data processing system, for checking that the parity bits correspond to the bits for which parity was encoded. An error correction circuit is also provided, in a second portion of the data processing system, for correcting errors in the bits for which parity was encoded. An indication is optionally provided to the data processing system of corrected errors.