Patent Document ID: 4727547
Application ID: 06753255

Base Claim:
1. A method for transforming a first sequence of words, comprising digital data words and correction words and having a first ordering of said data words and correction words, comprising the steps of: forming blocks out of said first sequence, each block consisting of a plurality of said data words and a plurality of said correction words in said first ordering; selecting data words and correction words from said first sequence and combining said data words and correction words in a way to form a second sequence with a second ordering of data words and correction words; selecting out of the second sequence of words a first group and a second group each composed of data words and correction words in such a way that said first group and said second group (share) have one common word (with one of said blocks of words having the first ordering) and said common word also belongs to one of said blocks composed of words having said first ordering; submitting simultaneously the data words of the first group and of the second group to a checking operation; evaluating the result of the checking operation and deciding if erroneous data words of the first group and of the second group can be corrected; and correcting said second sequence of words using said correction words, when indicated by said evaluation.

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Claim 2:
2. Method according to claim 1, comprising the steps of: selecting out of said sequence of data words and correction words a third and a fourth group additionally to said first and second groups, said third and fourth group each being composed of data words and correction words, such that a common data word belonging to said third group and said fourth group and a common data word belonging to said third group and said second group are obtained, whereby one common data word is the first data word of the fourth group and one common data word is the last data word of the second group; submitting simultaneously but subseqently to the submission of said first and second groups the data words of said third group and fourth group to a checking operation; and subsequently submitting the data words of said third group and said fourth group to known evaluation and correcting operations (operation).