Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
124 words
An apparatus for decoding double-encoding codes comprising: a first decoder for adding an erasure flag, when an error is detected in a first data of double-encoding codes, to all symbols of said first data so as to generate erasure symbols; and a second decoder for inputting thereto the double-encoding codes decoded by said first decoder, for detecting the number of erasure symbols which are contained in the second data of the double-encoding codes and on which an error is found, for correcting the second data when the number of erasure symbols is at most a maximum number of correctable symbols, and for detecting an error of the second data when the number of erasure symbols is greater than the maximum number of correctable symbols.
Claim 2
Independent Claim
124 words
An apparatus for decoding double-encoding codes comprising: a first decoder for adding an erasure flag, when an error is detected in a first data of double-encoding codes, to all symbols of said first data so as to generate erasure symbols; and a second decoder for inputting thereto the double-encoding codes decoded by said first decoder, for detecting the number of erasure symbols which are contained in the second data of the double-encoding codes and on which an error is found, for correcting the second data when the number of erasure symbols is at most a maximum number of correctable symbols, and for detecting an error of the second data when the number of erasure symbols is greater than the maximum number of correctable symbols.
Claim 3
Dependent Claim
23 words
An apparatus according to claim 1, wherein said first decoder detects an error when an error of the first data cannot be corrected.
Claim 4
Dependent Claim
27 words
An apparatus according to claim 1, wherein said first decoder checks the first data for an error and detects an error when an error is found therein.
Claim 5
Dependent Claim
53 words
An apparatus according to claim 1, wherein said second decoder detects the number of erasure symbols on which an error is found when the number of the erasure symbols contained in the second data is at most a constant, l, and detects an error when the number is greater than the constant, l.
Claim 6
Dependent Claim
50 words
An apparatus according to claim 4, wherein when the number of the erasure symbols contained in the second data does not exceed the constant, l, and is greater than the maximum number of correctable symbols, m (m<l), the number of erasure symbols on which an error is found is detected.
Claim 7
Independent Claim
85 words
A method for decoding double-encoding codes comprising the steps of: adding an erasure flag, when an error is found in a first data of double-encoding codes, to all symbols of the first data; detecting the number of symbols to which the erasure flag is added in the second data of double-encoding codes and on which an error is found; and correcting the second data when the number of the symbols on which an error is found is at most a maximum number of correctable symbols.
Claim 8
Independent Claim
85 words
A method for decoding double-encoding codes comprising the steps of: adding an erasure flag, when an error is found in a first data of double-encoding codes, to all symbols of the first data; detecting the number of symbols to which the erasure flag is added in the second data of double-encoding codes and on which an error is found; and correcting the second data when the number of the symbols on which an error is found is at most a maximum number of correctable symbols.