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Enhanced Error Correction

IP.com Disclosure Number: IPCOM000076737D
Original Publication Date: 1972-Apr-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Kiwimagi, RG: AUTHOR [+3]

Abstract

Many error-detection and correction codes can be enhanced through the use of pointing to channels or tracks in error; that is, the quality of a signal associated with a given set of signals in a parallel processing arrangement of several tracks or channels enhances the capability of an error-correction code, whenever a possible error condition is pointed to. Further enhancement is provided by combining the error-detection code evaluation of a quality signal or a hardware error pointer in a block code and converting same to a history pointer in another code independent block of data. This procedure takes advantage of system burst error failure modes. Such failure modes are common in radio communications, teletype communications, magnetic type systems, and the like.

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Enhanced Error Correction

Many error-detection and correction codes can be enhanced through the use of pointing to channels or tracks in error; that is, the quality of a signal associated with a given set of signals in a parallel processing arrangement of several tracks or channels enhances the capability of an error-correction code, whenever a possible error condition is pointed to. Further enhancement is provided by combining the error-detection code evaluation of a quality signal or a hardware error pointer in a block code and converting same to a history pointer in another code independent block of data. This procedure takes advantage of system burst error failure modes. Such failure modes are common in radio communications, teletype communications, magnetic type systems, and the like.

The technique is particularly useful in block codes wherein each block of codes in a multichannel environment is relatively independent; that is, each block contains a set of data signals with associated error-correction check bits, having predetermined mathematical relationships to the data bits; such error-correction code and data bits are unrelated to any other code blocks. The signals in each block are read through suitable means, either a radio receiver. a magnetic type transducer system and the like and supplied to an error-detection/correction system 10. The input to system 10 may be through a signal-detection system, not shown, which generates quality-indicating signals indicative of the quality of the signals in each channel of the block code. These quality signals are supplied to system 10 for use in connection with error detection and correction. Any data signals in error, which are correctable, are corrected by system 10 and supplied over cable 11 to utilization means, not shown. Any signal being corrected...