Disclosed is a data reading module for reading an optical disc with data regions and undesired regions, wherein at least one of the undesired regions is located between the data regions. The data reading module includes: a decoder arranged to decode the optical disc to generate decoded data; a data transferring device arranged to transfer the decoded data; and a controller arranged to control the decoder according to a recorded map indicating the locations of the data regions and the undesired regions; wherein the controller controls the decoder to skip the undesired regions and does not decode the undesired regions while decoding the optical disc.