| 摘要 |
<p>PURPOSE:To perform easily processings such as recording, rearranging, etc. of data with a simple electric means by arranging discrimination codes corresponding to individual character information on the same face or both faces. CONSTITUTION:In the code pattern figure, the first and the second lines 3 and 4 indicate timing codes, and the third - the eighteenth lines 5-20 indicate a two-type character code corresponding to each character, and the nineteenth line 21 indicates an error check code for even or odd parity check, and each line corresponds to each character. The length of the code corresponding to each character is set to two bytes to improve matching to latest OA devices. Two lines 3 and 4 of timing codes different in phase by 180 deg. are used to detect correctly the phase difference between reproduced timing codes of two lines in case of read, thereby facilitating checking information card.</p> |
