LASER POWER DECISION CIRCUIT AND METHOD FOR OPTICAL RECORD/REPRODUCING APPARATUS

摘要

The present invention relates to an optical recording and reproducing apparatus, and an object thereof is to provide a circuit and a method for determining an optimum laser power. To this end, in the present invention, the reference laser power is read to calculate different levels of test laser power, and the ID data and the EFM test pattern for identifying each of the calculated test laser powers are assigned to the ATIP frame unit in a specific partition with the corresponding test laser power. Record as. Thereafter, when the DC component of the reproduced RF signal converted into digital data during the partition reproduction has a value within the asymmetric allowable range, the laser power indicated by the input ID data corresponding thereto is determined as the optimal laser power, and then the determined laser power is determined. Record the data with