Error pointers for enhanced error correction

Details Error pointers for enhanced error correction Error pointers for enhanced error correction

1991-09-13

1997-04-22

Beausoliel, Jr., Robert W.

Excavating

G11C 2900, G06F 1100

Patent

active

056235070

ABSTRACT:
Signal processing circuitry receives input signals representing modulation encoded binary data signals. The signal processing circuitry contains a plurality of signal quality detectors which monitor a corresponding plurality of different characteristics of each received signal to determine whether or not the signal is of an adequate quality insofar as concerns the characteristic of the signal associated with each detector. Each detector generates a binary output signal representing a confidence level pointer associated with each such received signal. The pointer signals are stored in a buffer with received data signals. The contents of the buffer, which at this time contain the bytes of the received data record as well as the associated pointer bytes, are made available to a control module. Only the data and redundancy bytes of the record stored in the buffer are used by the control module if the data bytes are of sufficiently high quality so that any errors in the data bytes can be corrected using the redundancy bytes. If the received data bytes of the record are corrupted so that they cannot be corrected by the use of only the redundancy bytes, the control module reads the data buffer to receive the pointer bits of the record. The pointer bits specify with particularity which data bytes likely, contain errors. The control module uses the received pointer bits together with the redundancy bytes to correct the corrupted data bytes.

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