| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately reproduce original multimedia information from an information recording medium where more information is recorded in small recording area while the redundancy of a code is reduced. SOLUTION: As for a dot code 100, a recording medium is white and a marker 14 is recorded as a black dot on the recording medium. As for pattern, address, and data dots 80, 82, and 84, data '1' is recorded as a gray dot and data '0' is recorded as a transparent dot, so that the marker 14 and respective dots can be recorded to the same size. In this case, a data dot 84 is not modulated. An information reproduction system separates the marker and dots by a separation processing part 102 by using two kinds of threshold value.</p> |
