Optical disc device and optical disc recording method
AssigneeHitachi Consumer Electronics Co., Ltd.
InventorTomomi OKAMOTO
Life of this patent
Estimating the term…
Abstract
On the occasion of providing a guard track and additionally recording data in an optical disc provided with a guide layer having a physical groove structure for carrying out tracking servo control and not having a land/groove structure in recording layers carrying out recording and playback, it has sometimes occurred that it was difficult to reposition a light spot. Given that there are a recorded area and an unrecorded area in a recording layer, recording with respect to the concerned recording layer is taken to be impossible to implement when the recording capacity of the unrecorded area is less than a prescribed value.
Claims14
An optical disc device carrying out data recording or playback with respect to an optical disc formed by being provided with a guide layer having a physical groove structure for carrying out tracking servo control and stacking recording layers carrying out recording and playback, comprising:
- a first optical system which focuses a light beam on the guide layer and detecting the reflected light therefrom;
- and
- a second optical system which focuses a light beam on the recording layers and detecting reflected light therefrom,
- there being, in any of the recording layers, a recorded area in which recording of the data has been completed and an unrecorded area in which data have not yet been recorded;
- and that, in the case where the recording capacity of the unrecorded area is equal to or greater than a prescribed threshold value, takes additional data recording by means of the second optical system to be possible to implement, and when the recording capacity of the unrecorded area is less than the prescribed threshold value, takes additional data recording with respect to the recording layer to be impossible to implement.
An optical disc device recording method carrying out data recording with respect to an optical disc formed by being provided with a guide layer having a physical groove structure for carrying out tracking servo control and stacking recording layers carrying out recording and playback,
- wherein the optical disc device has a first optical system focusing a light beam on the guide layer and detecting the reflected light therefrom and a second optical system focusing a light beam on the recording layers and detecting reflected light therefrom,
- there being, in any of the recording layers, a recorded area in which recording of the data has been completed and an unrecorded area in which data have not yet been recorded, and, in the case where the recording capacity of the unrecorded area is equal to or greater than a prescribed threshold value, takes additional data recording by means of the second optical system to be possible to implement, and when the recording capacity of the unrecorded area is less than the prescribed threshold value, takes additional data recording with respect to the recording layer to be impossible to implement.
Dependencies are inferred from the claim text.