Excavating
Patent
1978-09-05
1980-07-22
Atkinson, Charles E.
Excavating
G06F 1112
Patent
active
042142288
ABSTRACT:
Described is an error-correcting and error-detecting system including a check-bits generating circuit which is formed in accordance with a (k,l) type check matrix, such (k,l) type check matrix being formed from an (m,l) type reference sub-matrix (where m<k) and one or more (m,l) type sub-matrices, and each of the (m,l) type sub-matrices being derived from the (m,l) type reference sub-matrix by replacing unit-matrices of the (m,l) type reference sub-matrix with each other in accordance with a circular shift; wherein a desired check-bits code of an input data is obtained by multiplying the input data with respective reference sub-matrix and sub-matrices and by rearranging respective multiplied results produced from the respective rows of these reference sub-matrix and sub-matrices.
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patent: 4099160 (1978-07-01), Flagg
Hong and Patel, A General Class of Maximal Codes for Computer Applications, IEEE Trans. on Computers, vol. C-21, No. 12, Dec. 1972, pp. 1322-1331.
Hattori Akira
Nara Yasuhiro
Sohma Yukio
Atkinson Charles E.
Fujitsu Limited
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