Patent ID: 7317673

Claim:
An apparatus for adjusting an offset in a DVD player, comprising: an offset measuring unit which measures offset parameters, which are composed of a sum signal, a position adjustment value of a focus lens, a constant linear velocity (CLV) adjustment value, and a variation adjustment value of an optical disc, the sum signal being a sum of a plurality of signals which are detected from the optical disc using a photo diode (PD) in an optical pickup of the DVD player, the focus lens being included in the optical pickup, and the CLV adjustment value being used to rotate the optical disc for initial reproducing operations of a DVD player; an offset setting unit which, when the offset measuring unit measures the offset parameters a number of times, calculates an average value of the measured offset values of the offset parameters and sets the average values as reference offset values for each of the measured offset parameters; and a comparator which compares, for each of the offset parameters, the offset values, which are measured during initial reproducing operations of the DVD player, with the reference offset value; and an offset adjusting unit which, based on a comparison result of the comparator for each of the offset parameters, adjusts the reference offset value to the newly-measured offset value when the newly-measured offset value is different from the reference offset value, wherein the newly-measured offset values are measured during a subsequent initial reproducing operation of a DVD player.