Optical disk having first and second recording areas with wobble frequencies that do not interfere with EFM signal
AssigneesPioneer Electronic Corporation, Pioneer Video Corporation
InventorsEiji Muramatsu, Akiyoshi Inoue, Shoji Taniguchi, Hiroyuki Takahashi, Shigenori Murakami, Toshihiko Takishita
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Abstract
A recordable optical disc on which information is recorded by applying a light beam on the surface thereof, includes: a first recording area on which information is recorded and reproduced while the disc is rotated at a first linear velocity; and a second recording area on which information is recorded and reproduced while the disc is rotated at a second linear velocity. The first recording area and the second recording area include guide grooves having wobble frequency lower than frequency band of EFM signal.
Claims8
A recordable optical disc on which information is recorded by applying a light beam on the surface thereof, comprising:
- a first recording area on which information is recorded and reproduced while the disc is rotated at a first linear velocity;
- and
- a second recording area on which information is recorded and reproduced while the disc is rotated at a second linear velocity, each of the first recording area and the second recording area comprising guide grooves having a wobble frequency free from interference with a frequency band of an EFM signal.
A recordable optical disc on which information is recorded by applying a light beam on the surface thereof, comprising:
- a first recording area on which information is recorded and reproduced while the disc is rotated at a first linear velocity;
- and
- a second recording area on which information is recorded and reproduced while the disc is rotated at a second linear velocity, the first recording area comprising guide grooves having a wobble frequency free from an interference with a frequency band of an EFM signal when said disc is rotated at the first linear velocity, and the second recording area comprising guide grooves having a wobble frequency free from interference with the frequency band of the EFM signal when said disc is rotated at the second linear velocity.
Dependencies are inferred from the claim text.