Patent ID: 8130610
Filing Date: 2012-03-06
Classification: G11B

Abstract:
1. An optical disc recording method in which information is recorded on an optical disc medium by irradiating the optical disc medium with a laser beam to form marks and portions between the marks (spaces), the laser beam being intensity-modulated to have pulse strings each including a cooling pulse, the optical disc recording method comprising the steps of: detecting an edge shift amount, per a mark length of nT, of a front edge of each recorded mark whose preceding mark is a mark having a length of nT, wherein n is an integer and T is a channel bit length; determining a duration of the cooling pulse in the pulse string forming the mark having a length of nT, on the basis of the detected edge shift amount and whether the detected edge shift amount is within an ignorable range; recording information on the optical disk medium by use of the determined pulse strings.