| 摘要 |
A method of processing data, for use in compression or encryption, is disclosed in which an input sequence of bits is divided into a plurality of portions. Each portion is sub-divided into a plurality of sub-divisions. Frequency analysis is performed to determine the number of occurrences of each sub-division permutation and new values are assigned, based on the frequency analysis, to each of the sub-division permutations. For each portion a label representing the permutation of bits in that portion is assigned. The label comprises a representation of a value resulting from adding the new values associated with the sub-division permutations of that portion. A processed sequence of bits is generated by replacing, within the input sequence of bits, bit portions with the respective label representing the permutation of bits in that portion. |
