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US 7,733,755 B2Granted
Recording medium with optional information and apparatus and methods for forming, recording, reproducing and controlling reproduction of 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 includes an identification information, which can identify whether optional information, such as copy protection information, is needed or not for the playback of contents stored on the recording medium, and to methods and apparatuses for forming, recording, and reproducing data on the recording medium.
Claims31
A computer-readable recording medium, comprising:
- an information area, the information area including a first region for a main data, and a second region for control information required for recording or reproduction of the main data and a bi-phased modulation data required for reproducing the control information or the main data, said control information being encoded as wobble pits,
- wherein the bi-phased modulation data is recorded along with a wobble pattern of the wobbled pits in such a manner that bit 0 and bit 1 are determined respectively depending on a direction of a transition of the wobble pattern within a predetermined period,
- wherein one of the bit 0 and the bit 1 is represented by only one transition from high to low in a middle within the predetermined period and another one is represented by only one transition to an opposite direction in the middle within the predetermined period.
A method of forming a recording medium, comprising:
- forming a first region for storing a main data;
- forming a second region for control information required for recording or reproduction of the main data and a bi-phased modulation data required for reproducing the control information or the main data;
- and
- encoding the control information as wobble pits,
- wherein the bi-phased modulation data is recorded along with a wobble pattern of the wobbled pits in such a manner that bit 0 and bit 1 are determined respectively depending on a direction of a transition of the wobble pattern within a predetermined period, and wherein one of the bit 0 and the bit 1 is represented by only one transition from high to low in a middle within the predetermined period and another one is represented by only one transition to an opposite direction in the middle within the predetermined period.
2 more elements
A method of reproducing data from a recording medium, comprising:
- utilizing control information required for reproduction of a main data, to reproduce the data and a bi-phased modulation data required for reproducing the control information or the main data, the control information being encoded as wobbled pits wherein the bi-phased modulation data is recorded along with a wobble pattern of the wobbled pits in such a manner that bit 0 and bit 1 are determined respectively depending on a direction of a transition of the wobble pattern within a predetermined period, wherein one of the bit 0 and the bit 1 is represented by only one transition from high to low in a middle within the predetermined period and another one is represented by only one transition to an opposite direction in the middle within the predetermined period, and
- wherein the utilizing step includes a step of decoding the control information by a demodulation method.
An apparatus for reproducing data from a recording medium, comprising:
- a signal detector to detect control information required for reproduction of a main data, to reproduce the data, and a bi-phased modulation data required for reproducing the control information or the main data, the control information being encoded as wobble pits, wherein the bi-phased modulation data is recorded along with a wobbled pattern of the wobbled pits in such a manner that bit 0 and bit 1 are determined respectively depending on a direction of a transition of the wobble pattern within a predetermined period, wherein one of the bit 0 and the bit 1 is represented by only one transition from high to low in a middle within the predetermined period and another one is represented by only one transition to an opposite direction in the middle within the predetermined period;
- and
- a signal processor, coupled to the signal detector, to decode the control information by a demodulation method.
Dependencies are inferred from the claim text.