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US 7,599,274 B2Granted
Recording medium with intermittent or alternate wobbled pits and apparatus and methods for forming, recording, and reproducing the recording medium
AssigneeLG Electronics Inc.
InventorsSang Woon Suh, Jin Yong Kim
Life of this patent
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Abstract
A recording medium, such as a high-density and/or read-only recording medium, such as BD-ROM, which contains a control ionformation, such as copy protection information, encoded in intermittent or alternate wobbled pits, and to methods and apparatuses for forming, recording, and reproducing data on the recording medium.
Claims19
A recording medium including recorded data, comprising:
- a control data area including pits formed along tracks, with data recorded therein, wherein pits in some portions of the tracks are formed as wobbled pits, and pits in other portions of the tracks of the control data area are substantially formed as straight pits, wherein the wobbled pits are formed intermittently or alternately with the straight pits within the control data area;
- and
- a main data area including a main data recorded with modulation in straight pits formed along tracks,
- wherein the control data area includes one or more address units, the address unit comprises a plurality of frames, the wobble pits and the straight pits being formed in unit of frame and the address unit including at least one frame with the wobbled pits and at least one frame without the wobbled pits,
- wherein the data in the control data area includes control information used for controlling reproduction and/or recording of the main data, the control information being encoded along with plural arrays of the wobbled pits, and
- wherein the control information is recorded by bi-phase modulation method in such a manner that bit 0 and bit 1 are determined respectively depending on a direction of a transition within a period, one of the bit 0 and the bit 1 is represented by a transition from low at a start to high in a middle and another one is represented by a transition in a opposite direction within the period.
3 more elements
A method of reproducing data from a recording medium, comprising:
- detecting data recorded in pits formed along tracks in a control data area, wherein pits in some portions of the tracks are formed as wobbled pits, and pits in other portions of the tracks of the control data area are substantially formed as straight pits, wherein the wobbled pits are formed intermittently or alternately with the straight pits within the control data area, wherein the control data area includes one or more address units, the address unit comprises a plurality of frames, the wobble pits and straight pits being formed in unit of frame and the address unit including at least one frame with the wobbled pits and at least one frame without the wobbled pits;
- wherein the data in the control data area includes control information used for controlling reproduction and/or recording of the main data, the control information being encoded along with plural arrays of the wobbled pits, and
- wherein the control information is recorded by bi-phase modulation method in such a manner that bit 0 and bit 1 are determined respectively depending on a direction of a transition within a period, one of the bit 0 and the bit 1 is represented by a transition from low at a start to high in a middle and another one is represented by a transition in an opposite direction within the period;
- and
- generating the control information in the unit of frame to reproduce main data recorded with modulation in straight pits formed along tracks of a main data area of the recording medium.
2 more elements
An apparatus for reproducing data from a recording medium, said apparatus comprising:
- a detection unit configured to detect data recorded in pits formed along tracks in a control data area, wherein pits in some portions of the tracks are formed as wobbled pits, and pits in other portions of the tracks of the control data area are formed as straight pits,
- wherein the wobbled pits are recorded intermittent or alternate with the straight pits, wherein the control data area includes one or more address units, the address unit comprises a plurality of frames, the wobble pits and straight pits being formed in unit of frame, the address unit including at least one frame with the wobbled pits and at least one frame without the wobbled pits, wherein the data in the control data area includes control information used for controlling reproduction and/or recording of main data, the control information being encoded along with plural arrays of the wobbled pits, and wherein the control information is recorded by bi-phase modulation method in such a manner that bit 0 and bit 1 are determined respectively depending on a direction of a transition within a period, one of the bit 0 and the bit 1 is represented by a transition from low at a start to high in a middle and another one is represented by a transition in an opposite direction within the period,
- the detection unit being configured to convert signals reflected from the pits into electric signals and generating data from the electrical signals;
- and
- a data processor configured to process the control information in the unit of frame from the data and to process the main data recorded with modulation in straight pits formed along tracks of a main data area of the recording medium by using the control information.
2 more elements
Dependencies are inferred from the claim text.