Back to results
US 8,077,572 B2Granted
Recording medium with restricted playback feature 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
Estimating the term…
Abstract
A recording medium, such as a high-density and/or read-only recording medium, such as BD-ROM, capable of preventing unauthorized duplication of data streams, written thereon, onto another medium, such as a BD-RE or BD-R, which includes physical mark information, and to methods and apparatuses for forming, recording, reproducing, and restricting playback of the recording medium to prevent unauthorized duplication.
Claims12
A method of forming a recording medium, comprising:
- forming an information area for recording disc management information and/or data;
- recording disc identification information identifying a type of computer readable medium in an area preceding the lead-in area, the type being selected from a set of media types, the set of media types including Read-Only, Recordable and Rewritable type;
- and
- the disc identification information being formed as a physical mark, the physical mark being a pit type, the pit type selected from at least one of wobbled pits and straight pits, wherein the physical mark provides control information for controlling a reproduction of data recorded as straight pits on a data area of the recording medium and is formed along a modulated unique pattern, wherein if the pit type is wobbled pits, at least a part of the wobbled pits forming the physical mark is shifted from a central line of the wobbled pits, and wherein the modulated unique pattern represents encryption information used in encrypting data of the data area.
1 more element
A method of reproducing data from a recording medium, including a lead-in area, a data area and a lead-out area, comprising:
- detecting physical mark information recorded as a pit type from an area preceding the lead-in area, the physical mark information representing disc identification information identifying a type of computer readable medium, the pit type having been selected from at least one of wobbled pits and straight pits in the area preceding the lead-in area that is not writable by end user recorders, the type being selected from a set of media types, the set of media types including one of Read-Only, Recordable and Rewritable type, the physical mark information being formed along a modulated unique pattern, wherein if the pit type was wobbled pits, at least a part of the wobbled pits forming the physical mark information is shifted from a central line of the wobbled pits;
- and
- controlling a reproduction of data recorded as straight pits from the data area based on the detected physical mark information.
An apparatus for reproducing data from a recording medium including a lead-in area, a data area and a lead-out area, comprising:
- an optical pickup configured to detect physical mark information recorded as a pit type from an area preceding the lead-in area, the physical mark information representing disc identification information identifying a type of recording medium, the pit type selected from at least one of wobbled pits and straight pits in the area preceding the lead-in area that is not writable by end user recorders, the type being selected from a set of media types, the set of media types including one of Read-Only, Recordable and Rewritable type, the physical mark information being formed along a modulated unique pattern, wherein if the pit type is wobbled pits, at least a part of the wobbled pits forming the physical mark information is shifted from a central line of the wobbled pits;
- and
- a controller configured to control a reproduction of data recorded as straight pits from the data area based on the detected physical mark information.
A method of forming a recording medium, comprising:
- forming an information area for recording disc management information and/or data;
- and
- forming physical mark information as a pit type, the pit type selected from at least one of wobbled pits and straight pits in an area preceding a lead-in area of the recording medium, wherein the physical mark information provides control information for controlling a reproduction of data recorded as straight pits on a data area of the recording medium and is formed along a modulated unique pattern, wherein if the pit type selected is wobbled pits, at least a part of the wobbled pits forming the physical mark information wobble in a non-overlapping manner with respect to a central line of the wobbled pits, and wherein the modulated unique pattern represents encryption information used in encrypting data of the data area, the physical mark information identifying a type of the recording medium, the type being selected from a set of media types, the set of media types including one of Read-Only, Recordable and Rewritable type.
Dependencies are inferred from the claim text.