US 6,473,377 B2 · OPTICAL DISC RECORD CARRIER WITH WOBBLED GROOVES THAT PERMIT RECORDING ON THE GROOVES AND LANDS, APPARATUS FOR MANUFACTURING SUCH A RECORD CARRIER, AND RECORDING AND/OR REPRODUCING APPARATUS FOR SUCH A RECORD CARRIER

Abstract

An optical disc record carrier having at least one wobbled groove that permits information recording on both groove and land tracks is provided. Each groove has a sync wobbling modulated with a continuous signal and an address wobbling. The address wobbling includes an address portion including address information of each sector. The address portion comprising presence of a first predetermined number of wobbles and absence of a second predetermined number of wobbles. The presence and absence correspond to respective logical values of binary system. The grooves and lands are substantially the same in width throughout and wobble in phase.

Claims2

Dependent claims

A method of recording information on and/or reading information from an optical disc record carrier having a groove and a land, upon both of which information is adapted to be recorded, the groove and land being divided into sectors, the groove having a sync wobbling on one side of the groove and an address wobbling on the other side of the groove, the method comprising the steps of:

revolving said record carrier at constant linear velocity;
detecting a wobbling signal from a read signal from said record carrier;
extracting a first wobble signal caused by said sync wobbling from said read signal:
extracting a second wobble signal corresponding to said address wobbling by using said first wobble signal;
reading address information from said second wobble signal;
and
controlling a revolution of said record carrier in response to said address information.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/919,393Filed 31 Jul 2001 · division

Priority

JP 10-6228926 Feb 1998

Published

US 2001/0050888 A113 Dec 2001

Granted

29 Oct 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

G11B 27/24
By using information detectable on the record carrier: by sensing features on the record carrier other than the transducing track ; sensing…
G11B 7/007
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the…:…
G11B 7/00718
Arrangement of the information on the record carrier, e.g. form of tracks , actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped;…:…
G11B 7/00745
Arrangement of the information on the record carrier, e.g. form of tracks , actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped;…:…

Optical disc record carrier with wobbled grooves that permit recording on the grooves and lands, apparatus for manufacturing such a record carrier, and recording and/or reproducing apparatus for such a record carrier

Life of this patent

Optical disc record carrier with wobbled grooves that permit recording on the grooves and lands, apparatus for manufacturing such a record carrier, and recording and/or reproducing apparatus for such a record carrier

Life of this patent

Abstract

Claims2