Signal recording layer recognition method in digital disk and apparatus thereof

A method of recognizing a signal recording layer in a disk loaded in a digital disk player capable of using disks with one recording layer and disks with multiple recording layers, said signal recording layer recognition method comprising:

• a) performing an initial focusing operation of a pickup by transmitting a laser from said pickup, said focusing operation determined on the basis of a position corresponding to a focus position;
• b) converting an optical signal transmitted via the pickup in step a) into an electrical pulse signal, said pulse signal having a number of pulses in a predetermined interval of time according to the number of the signal recording layers of a disk loaded in said digital disk player;
• c) counting the number of pulses in the electrical pulse signal in said predetermined interval of time and generating a counted value;
• and
• d) determining whether the loaded disk has a multiple or a single recording layer structure based on said counted value.