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AssigneeKabushiki Kaisha Toshiba
InventorsToshihiko Kaneshige, Koichi Otake, Hideyuki Yamakawa, Yukiyasu Tatsuzawa, Hiroyuki Moro
Estimating the term…
A recorded stream generator generates a data block stream in synchronism with the phase of a recording clock, from the input data. The recorded stream generator further generates, for each predetermined data unit constituting the data block stream, a data phase reference pulse indicative of the phase of the data unit. An inserting section inserts a VFO signal into a predetermined amount (32 sectors) of the data block stream, the VFO signal having a length of time corresponding to a difference in phase between an wobble address phase signal and a data phase reference pulse. The inserting section thus provides a data stream DST consisting of the VFO signals and the data block streams. An LD uses light beams to record the data stream on an optical disk.
An optical disk apparatus comprising:
A method for recording information in an optical disk apparatus which records information on an optical disk, the method comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
By using information detectable on the record carrier: by sensing features on the record carrier other than the transducing track ; sensing…
Tracks: meandering
Formatting, e.g. arrangement of data block or words on the record carriers: on discs
Using self-clocking codes: characterised by the use of two levels
About 2 months of term left · ends 19 Dec 2026 (estimated)
This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2003-431032, filed Dec. 25, 2003, the entire contents of which are incorporated herein by reference.
1. Field of the Invention
The present invention relates to an optical disk on which address information is recorded as wobbles of a recording track, an optical disk apparatus that records and reproduces information on and from the optical disk, and a method of recording information.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention, and together with the general description given above and the detailed description of the embodiments given below, serve to explain the principles of the invention.
FIG. 1 is a diagram showing the configuration of a track formed on an optical disk;
FIG. 2 is an enlarged diagram of the track formed on the optical disk;
Embodiments of the present invention will be described below in detail with reference to the drawings.
An optical disk on which user information can be recorded has a guide groove in an information area in an information recording layer on a transparent substrate; the guide groove is often simply referred to as a groove. The guide groove is called a track. Information is recorded and reproduced along the track. In some cases, the track is of a spiral type that extends continuously from inside to outside as shown in FIG. 1. In other cases, the track is of a concentric type formed of a plurality of concentric circles (not shown).
FIG. 2 is an enlarged diagram of the track. The track is formed of concaves and convexes of the information recording layer. The concave of the track is called a groove, while the convex of the track is called a land. For example, in the DVD-RAMs or next-generation recordable optical disks, information is formed both on the lands and grooves to increase density in a radial direction.