Information bearing medium and information processing system

摘要

An information processing system includes an information bearing medium and an information reading unit. The information bearing medium has a two-dimensional array of unit data zones. Marks are provided on some of the unit data zones so as to form a digital code. Mark patterns of any two Y-directional adjacent unit data zone strings based on the arrangement of marks in an X-direction differ from each other. The information reading unit generates a data string on the basis of a unit signal formed from a plurality of signals output from a group of detection units that detect the marks in synchronization and recognizes the digital code of the information bearing medium on the basis of a group of the data strings sequentially obtained from the array of the unit data zones.

主权项

1. An information processing system comprising: an non transitory information bearing medium comprising:
a media substrate; a plurality of unit data zones arranged on the media substrate in an array comprising a first direction and a second direction different from the first direction, wherein a mark is provided on at least one of the unit data zones in the array of the unit data zones so as to form a code, wherein the array is formed from unit data zone strings each extending in the first direction, wherein mark patterns in the first direction of any two unit data zone strings adjacent to each other in the second-direction differ from each other; a first mark pattern of a beginning unit data zone string based on the arrangement of marks in the first direction, wherein the beginning unit data zone string is positioned in an anterior position of the second direction; a second mark pattern of a terminal unit data zone string based on the arrangement of marks in the first direction, wherein the terminal unit data zone string is positioned in a posterior position of the second direction; and a third mark pattern that is an inverse of the second mark pattern, wherein the first mark pattern differs from the second mark pattern and the third mark pattern, wherein the second mark pattern of the terminal unit data zone string of the non transitory information bearing medium based on the arrangement of marks in the first direction is a particular mark pattern; and an information reading unit configured to read the code formed in the array of the unit data zones of the non transitory information bearing medium, wherein the information reading unit comprises: a mount unit configured to accept the non transitory information bearing medium and to allow the non transitory information bearing medium to move in the second direction, a plurality of detectors that are provided in the mount unit and arranged in a direction parallel to the first direction of the non transitory information bearing medium, wherein each detector is configured to detect the marks provided on the unit data zones corresponding to the position of the detector and is configured to output signals corresponding to a result of detection, and a processor that generates a data string based on a unit signal formed from the plurality of output signals from the detectors and recognizes the code based on a group of the data strings sequentially obtained from the array of the unit data zones of the non transitory information bearing medium, wherein upon detecting a particular data string obtained from the particular mark pattern, the processor performs a process to recognize the code, and wherein upon detecting a reverse particular data string obtained from the third mark pattern that is an inverse of the second mark pattern, the processor performs an error process.