Patent ID: 7978581
Filing Date: 2011-07-12
Classification: G11B

Abstract:
1. A method of recording or reproducing data on or from a recording medium having multi-recording-layer structure, comprising: reading each control information from a specific area of each recording layer of the recording medium, wherein a first recording layer includes only first control information for the first recording layer and a second recording layer includes only second control information for the second recording layer, wherein reading the first control information from the first recording layer and the second control information from the second recording layer sequentially and said each control information includes reference power information for a corresponding recording layer and wherein the first and second control information are recorded as wobbled patterns in the specific area of each recording layer, and further wherein the wobbled patterns comprise ADIP (Address In Pre-Groove) units, a plurality of ADIP units comprises one or more ADIP words, and the control information is included in ADIP words; storing the read control information in a memory associated with an optical disc apparatus; adjusting a power value to be used for at least one of a recording operation and a reproducing operation at a target recording layer, by referring to the read control information stored in the memory without reading the control information from the recording medium; and performing at least one of the recording and reproducing operations based on the adjusted power value.