Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Patent
1997-07-14
1999-10-12
Beausoliel, Jr., Robert W.
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
707202, 714764, G06F 1100
Patent
active
059648856
ABSTRACT:
Recovering text from a damaged electronic file by scanning an arbitrary stream of bytes and extracting text that is encoded as ASCII or Unicode. A byte of the damaged file is read. The read byte may be interpreted using the ASCII encoding standard. The read byte and the immediately preceding read byte may also be interpreted using the Unicode character encoding standard. The interpreted byte(s) is classified based upon the likelihood that the byte(s) is actually text for the particular character set rather than a control character, damaged data, or an element other than a textual character. The classifications are used to adjust a likelihood counter for each character type. The likelihood counter may be an integer value that indicates the probability that a text run has been detected. A text run is a sequence of bytes that is believed to be undamaged text. Each likelihood counter is then examined to determine whether there is a text run for one of the character types. If there is a text run, then the starting position of the text run is saved. The entire text run is output when the text run ends.
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Peter Norton, "The Norton Utilities Version 5.0 Disk Explorer", pp. 116-118 and 125-129, 1990.
Little Robert Andrew
Mueller Stephan Brian
Beausoliel, Jr. Robert W.
Microsoft Corporation
Revak Christopher A.
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