Wobble addressing method for land and groove structured optical storage

In this paper, two wobble addressing methods for land and groove structured optical discs are proposed. These methods use only modulated wobble signal s for addressing, while excluding the need for an embossed prepit. As a con sequence, the overhead associated with the proposed methods is less than th at of the conventional addressing method for rewritable digital versatile d iscs. In addition, the proposed methods enable the use of a one-beam master ing machine for making discs. This is possible because a signal from a land track is optically added to two signals from adjacent groove tracks, which are produced by a single laser beam for each signal. while maintaining its phase relationship for signal decoding. The advantages of the proposed met hods have been demonstrated through computer simulation as well as through evaluation of test discs.