| 摘要 |
<p>To make an error-correcting code Cz, encoding is performed as follows: a first information of k1 x k2 digits having k1 digits in a first direction and k2 digits in a second direction is encoded into a product code CA of n1 x n2 digits by combining a partial code word C1 expressed in a linear (n1, k1, d1) code having a minimum distance d1 in the first direction with a partial code word C2 expressed in a linear (n2, k2, d2) code having a minimum distance d2 in the second direction; second information of r x kx (r < n1 - k1, kx < n2) digits is encoded into a code Us of a linear (n2, kx, d3) code having a minimum distance d3 in the second direction; and the code Us is superimposed on a check digit part of the product code CA. The first and second information are obtained from the code Cz.</p> |
