Method for correcting noise errors in a digital signal

Details Method for correcting noise errors in a digital signal Method for correcting noise errors in a digital signal

2006-05-16

2006-05-16

Lamarre, Guy J. (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S800000

Reexamination Certificate

active

07047472

ABSTRACT:
An apparatus and method for processing a received signal that has been corrupted by a channel to generate a processed signal having less signal corruption than the received signal is disclosed. The apparatus stores the received signal, information specifying the probability that a symbol having a value I will be converted to a symbol having a value J by the channel, and information specifying a signal degradation function that measures the signal degradation that occurs if a symbol having the value I is replaced by symbol having a value J. The controller replaces each symbol having a value I in a context of that symbol in the received signal with a symbol having a value J that minimizes the overall signal degradation in the processed signal relative to the underlying noise-free signal as estimated via the observed statistics within that context.

REFERENCES:
patent: 5533033 (1996-07-01), Ratner
patent: 5596565 (1997-01-01), Yonemitsu et al.
patent: 6161209 (2000-12-01), Moher
patent: 6199186 (2001-03-01), Chen et al.

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