Loading patent…
AssigneeHitachi, Ltd.
InventorsHarukazu Miyamoto, Hiromi Kudo, Takeshi Maeda
Estimating the term…
There are provided parts where respective addresses of grooves on both sides of a land are identical to each other, and selection marks indicating validity of the parts are disposed. The selection marks determines the validity by taking advantage of the fact that there occurs a difference in wobble waveform in the land between a case of wobble data of the grooves on both sides of the land are identical and a case of the wobble data differ from each other. In this case, the wobble address method having an advantageous format efficiency can be used in combination with land/groove recording capable of narrowing down tracks, so that a reproduction method using a large capacity optical disc capable of high-density recording can be implemented.
An information recording medium having a plurality of tracks, the tracks each comprising:
An information reproduction method using an information recording medium having first and second address information, said method comprising the step of:
An information reproduction method using an information recording medium, having first and second address information and a selection signal indicating which of the first address information and the second address information is valid, said method comprising the step of reproducing a plurality of the selection signals for determination by reproduction of the selection signals.
Dependencies are inferred from the claim text.