Light Information Device and Light Information Processing Method

A light information processing method for recording two-dimensional page data to an information recording medium, comprising:

• a first information generation step for generating a first bit string;
• a second information generation step for generating a second bit string on the basis of the first bit string;
• and
• a spatial light modulation step for displaying a pattern corresponding to the second bit string,
• wherein in the second information generation step, first processing is performed to invert each bit of the first bit string corresponding to first identification information with a predetermined cycle, and the second bit string corresponding to the first identification information is generated, and
• second processing, which is different from the first processing, is performed on the first bit string corresponding to second identification information including a bit that switches with the same cycle as the cycle, and the second bit string corresponding to the second identification information is generated, a first cycle for switching the first bit string corresponding to the first identification information being longer than the predetermined cycle, a second cycle for switching the first bit string corresponding to the second identification information being substantially similar to the predetermined cycle.

A light information device for recovering two-dimensional page data from an information recording medium, comprising a header information recovering unit for recovering header information recorded in the two-dimensional page data,

• wherein the header information recovering unit includes:
• a page number generation unit for generating a page number from page number information recorded in the header information;
• and
• an inversion cycle information recovering unit for recovering inversion cycle information recorded in the header information,
• wherein address information of the two-dimensional page data is generated from a recovering result of the page number generation unit and the inversion cycle information recovering unit.

A light information processing method for recovering two-dimensional page data from an information recording medium, comprising:

• a header information recovering step for recovering header information recorded in the two-dimensional page data;
• a page number generation step for generating a page number from page number information recorded in the header information;
• an inversion cycle information recovering step for recovering inversion cycle information recorded in the header information;
• and
• an address information generation step for generating address information of the two-dimensional page data from a recovering result of the inversion cycle information and the generated page number.

A light information processing method for recording two-dimensional page data to an information recording medium, comprising:

• a first information generation step for generating a first bit string;
• a second information generation step for generating a second bit string on the basis of the first bit string;
• and
• a spatial light modulation step for displaying a pattern corresponding to the second bit string,
• wherein in the second information generation step, first processing is performed to invert each bit of the first bit string corresponding to first identification information with a predetermined cycle, and the second bit string corresponding to the first identification information is generated, and
• the first processing is performed for bit strings switching with another cycle than the predetermined cycle in the first bit strings corresponding to second identification information including a bit that switches with the same cycle as the predetermined cycle, thus the second bit string corresponding to the second identification information is generated.