Abstract: A method for determining a compensation value for tracking error signal in an optical disc drive is disclosed. The optical disc drive rotates a DVD to read data. The DVD has a first reflection layer and a second reflection layer. The first and the second reflection layers have respectively a number of circles of first and second tracks. First, read data on two first and two second tracks and accordingly generate two first compensation values for tracking error signal and two second compensation values for tracking error signal. Next, determine the third compensation value for tracking error signal corresponding to each of the other first tracks according to two of the first compensation values for tracking error signal. Then, determine the forth compensation value for tracking error signal corresponding to each of the other second tracks according to two of the second compensation values for tracking error signal.

Abstract: An intelligent layer jump method applied when an optical disc drive accesses a disc. The disc has a central reference point, at least a first recoding layer and a second recoding layer. The first recoding layer has a plurality of first tracks, while the second recoding layer has a plurality of second tracks. Firstly, a laser beam of the optical disc drive is focused on the first recoding layer to form a focal point and obtain an original position. Then, the relative position between an original position and a target position positioned on the second recoding layer are compared to determine a layer jump and track seeking path of the focal point. Lastly, the focal point is shifted from the original position to the target position according to the predetermined layer jump and track seeking path.

Abstract: A method for determining a compensation value for tracking error signal in an optical disc drive is disclosed. The optical disc drive rotates a DVD to read data. The DVD has a first reflection layer and a second reflection layer. The first and the second reflection layers have respectively a number of circles of first and second tracks. First, read data on two first and two second tracks and accordingly generate two first compensation values for tracking error signal and two second compensation values for tracking error signal. Next, determine the third compensation value for tracking error signal corresponding to each of the other first tracks according to two of the first compensation values for tracking error signal. Then, determine the forth compensation value for tracking error signal corresponding to each of the other second tracks according to two of the second compensation values for tracking error signal.

Abstract: An intelligent layer jump method applied when an optical disc drive accesses a disc. The disc has a central reference point, at least a first recoding layer and a second recoding layer. The first recoding layer has a plurality of first tracks, while the second recoding layer has a plurality of second tracks. Firstly, a laser beam of the optical disc drive is focused on the first recoding layer to form a focal point and obtain an original position. Then, the relative position between an original position and a target position positioned on the second recoding layer are compared to determine a layer jump and track seeking path of the focal point. Lastly, the focal point is shifted from the original position to the target position according to the predetermined layer jump and track seeking path.