An information recording medium (30) has a recorded system control file (SCF) (96) representing processing parameters necessary for reproduction processing for reading out a print-recorded code pattern and reproducing original multimedia information. With an SCF readout switch (88) operated, an initially determined SCF read-out parameter is input from a parameter memory (92) to a controller (66). The controller (66) controls each part in accordance with the input parameter and outputs read-out image data as a 1-SDU1 to an overlying layer and a state signal, that is, a signal showing that the SCF is being read out, as a 1-SDU2 to the overlying layer. The overlying layer decodes the contents of the SCF (96) and a parameter setting signal is input as the 1-SDU3 from the overlying layer and it is stored in the layer 1 parameter memory (92). At a time of reading out an actual dot code (10) corresponding to the operation of a scanning start switch (86) the parameter memory (92) utilizes its stored contents.