| 摘要 |
<p>The invention concerns a method which consists in: forming two different sets of at least more than 2c alphanumeric characters each, all said characters being coded by coding values VC on c bits and defining together a group of twice 2¿c? alphanumeric characters capable of being used in a message, and a predetermined switching information DC coded on c bits and representing a change of set of characters corresponding to the coding values; inserting in successive data blocks, the coding values VC of the different characters of the message interrupted as many times as necessary with said coded switching information DC; inserting at the beginning of each block an identification information I enabling to identify the set of characters corresponding to the coding values inserted in said block after the identification information and until the possible presence in the block of said switching information.</p> |
