Patent ID: 6317855
Filing Date: 2001-11-13
Classification: H03M

Abstract:
A method for error correcting two-dimensionally arranged data and for checking the correction using an error detecting code affixed to the data, wherein the error detecting code was obtained by performing a checking arithmetic operation on the data in a first direction, the method comprising:performing a first checking arithmetic operation on the data using the error detecting code to generate a first sample value;error correcting the data in the first direction and generating a first correction value if an error is detected;performing a second checking arithmetic operation in the first direction using the first correction value to generate a second sample value;comparing the first sample value with the second sample value to generate a first check value;error correcting the data in a second direction and generating a second correction value if an error is detected;performing a third checking arithmetic operation in the first direction using the second correction value to generate a third sample value; andcomparing the first check value with the third sample value to generate a second check value which represents the check result of the error correction along the second direction.