Digital error detection using bracketing
OwnerGlenn A. Reitmeier, Frank J. Marloweinventors
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Abstract
In a transmission channel, such as a tape recorder, errors in code words usually occur in bursts. Further, it is usually possible to detect only some of the erroneous code words. To conceal undetected erroneous code words, concealment starts before, and continues after, a detected erroneous code word. Thus the undetected erroneous code words in an error burst have a high probability of being concealed.
Claims10
A method for handling data code words, said method comprising detecting erroneous code words, estimating replacement code words both for said detected erroneous code words and for at least some code words within a selected interval of said erroneous words, and replacing said erroneous code word and said code words within said selected interval by said estimated code words respectively, whereby most undetected errors are thus concealed.
An apparatus for handling data code words, said apparatus comprising detecting means for detecting erroneous code words, estimating means coupled to said detecting means for estimating replacement code words both for said detected erroneous code words and for at least some code words within a selected interval of said erroneous words, and replacing means coupled to said detecting means and said estimating means for replacing said erroneous code word and said code words within said selected interval by said estimated code words respectively, whereby most undetected errors are thus concealed.
Dependencies are inferred from the claim text.