Optical recording medium and apparatus for reproducing optical recording medium
AssigneeSony Corporation
InventorsYoichiro Sako, Hiroshi Ogawa, Tatsuya Inokuchi
Life of this patent
Estimating the term…
Abstract
An optical recording medium having plural recording layers includes a first recording layer on which first data is to be recorded and a second recording layer on which second data is to be recorded, the first and second data being relevant to one another. The first and second recording layers are layered together, with the second data being recorded at a location in the second recording layer in the vicinity of a location in the first recording layer where the first data relevant to the second data is recorded. Replay signals of variable configurations can be obtained by suitably synthesizing data read out from the respective recording layers.
Claims4
A reproducing apparatus for an optical recording medium having a first recording layer for recording first data and a second recording layer for recording second data, the first and second recording layers being positioned adjacent to one another and the second data being recorded at a location in the second recording layer in proximity to a location in the first recording layer where first data relevant to the second data is recorded, the reproducing apparatus comprising:
- readout means for reading the first data as main data from the optical recording medium and for reading the second data as sub-data relevant to the main data from the optical recording medium, the readout means accessing from one recording layer to the other recording layer by shifting an objective lens in a non-radial direction on the optical recording medium within a field of view of the objective lens without moving a sled mounting the objective lens;
- reproducing means for generating replay signals based on the main data and the sub-data read by the readout means;
- and
- control means for controlling the readout means and the reproducing means.
Dependencies are inferred from the claim text.