INFORMATION RECORDING MEDIUM HAVING OPTICALLY READABLE DATA CODE PATTERN RECORDED THEREON AND WHICH CAN BE MANUALLY SCANNED, AND INFORMATION REPRODUCTION APPARATUS THEREFOR

A dot code consists of a group of plurality of blocks arranged in a matrix manner, and each block has markers, an array direction detecting code, a block address, and block recorded data. A dot code in which two rows and (N/2) columns of N blocks having block addresses 1 to N are arranged and which has an effective code width CEW is doubly provided, i.e., two such dot codes are recorded parallel on an information recording medium. A recording code width CRW in this case is twice the effective code width CEW.