Patent ID: 7369476

Claim:
Device for reading from or writing to optical recording media ( 1 ) having an optical scanner ( 2 ) for scanning the recording medium ( 1 ) by means of a light beam ( 3 ) and for generating scanning signals (HF) from the reflected beam ( 3 ), a data slicer ( 5 ) for converting a scanning signal (HF) output by the optical scanner ( 2 ) into a binary signal (HF″), an averaging unit ( 6 ) for forming an average value (M) from the scanning signal (HF, HF″), the average value (M) being used as a second input signal of the data slicer ( 5 ), and a control unit ( 14 ) for changing a parameter (T, OF) of the averaging unit ( 6 ), characterized in that the control unit ( 14 ) has a unit ( 8 , 10 ) for outputting a comparison value (S, HFN) and a comparator ( 7 , 11 ) comparing the average value (M) with said comparison value (S, HFN), and triggers a change in the parameter (T, OF) in the event of the comparison value being exceeded or undershot.