Source: http://www.google.com/patents/US7680022?dq=6,757,710
Timestamp: 2016-05-27 06:53:42
Document Index: 720594412

Matched Legal Cases: ['Application No. 10', 'Application No. 200710138431', 'Application No. 2006136920', 'Application No. 04808643', 'Application No. 07111355', 'Application No. 2007', 'Application No. 2007', 'Application No. 2007', 'application No. 2006136909', 'Application No. 2006136909', 'Application No. 2004317315', 'Application No. 2006136920', 'Application No. 07110264', 'Application No. 07150328', 'Application No. 07120363']

Patent US7680022 - Recording medium with physical access control (PAC) cluster thereon and ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA recording medium having at least one control data area storing control data in a recording unit. The control data may be used for managing an access to the recording medium. The medium having at least one management area storing status information for the control data area, wherein an invalid recording...http://www.google.com/patents/US7680022?utm_source=gb-gplus-sharePatent US7680022 - Recording medium with physical access control (PAC) cluster thereon and apparatus and methods for forming, recording, and reproducing the recording mediumAdvanced Patent SearchPublication numberUS7680022 B2Publication typeGrantApplication numberUS 11/889,897Publication dateMar 16, 2010Priority dateMar 19, 2004Fee statusPaidAlso published asCA2558895A1, CA2558895C, CA2559575A1, CA2559575C, EP1726015A1, EP1726015B1, EP1730731A2, EP1730731B1, US7701809, US7760613, US7782742, US20050207319, US20050207320, US20070291627, US20080049588, WO2005089072A2, WO2005089072A3, WO2005091292A1Publication number11889897, 889897, US 7680022 B2, US 7680022B2, US-B2-7680022, US7680022 B2, US7680022B2InventorsYong Cheol ParkOriginal AssigneeLg Electronics, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (80), Non-Patent Citations (22), Referenced by (9), Classifications (44), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetRecording medium with physical access control (PAC) cluster thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US 7680022 B2Abstract
A recording medium having at least one control data area storing control data in a recording unit. The control data may be used for managing an access to the recording medium. The medium having at least one management area storing status information for the control data area, wherein an invalid recording unit in the control data area is skipped and next available recording unit is used.
a user data area including a plurality of segment regions for storing user data;
at least one control data area including a plurality of access control data regions for storing access control data, the access control data controlling an access to the segment regions in the recording medium and enlarging a reproduction compatibility of the recording medium, wherein a number of the segment regions to which the corresponding access control data applies, is limited to a predetermined value; and
at least one management area for storing status information indicating status of each access control data region, the status information indicating at least whether the access control data region is defective or not,
wherein a defective access control data region is skipped, and the access control data is recorded on a next normal access control data region.
2. The recording medium of claim 1, wherein the access control data includes a predetermined rule for controlling the access to the recording medium when the access control data is not identified by a recording/reproducing device.
3. The recording medium of claim 2, wherein the predetermined rule is used when a version of the access control data is not identified by the recording/reproducing device.
4. The recording medium of claim 1, wherein the status information further indicates whether the access control data stands recorded on the corresponding access control data region.
5. The recording medium of claim 1, wherein the status information includes first information for indicating a validity of the corresponding access control data region and second information for indicating an invalidity of the corresponding access control data region.
6. The recording medium of claim 1, wherein the control data area is located in an inner area of the recording medium.
7. The recording medium of claim 1, wherein the management area is located in inner and outer areas of the recording medium.
8. The recording medium of claim 1, wherein the control data area includes a first control data area for storing first access control data and a second control data area for storing second access control data which is a copy of the first access control data, and the management area includes a first management area for storing status information of the first access control data and a second management area for storing status information of the second access control data.
9. The recording medium of claim 8, wherein if the first control data area includes the defective access control data region, the access control data regions in the first and second control data areas are skipped.
10. The recording medium of claim 9, wherein the status information of the skipped access control data regions indicates that the corresponding access control data regions are invalid.
11. A method of recording data/information on a recording medium, comprising:
recording access control data on a plurality of access control data regions in at least one control data area, the access control data controlling an access to a plurality of segment regions of a user data area in the recording medium and enlarging a reproduction compatibility of the recording medium, wherein a defective access control data region is skipped, and the access control data is recorded on a next normal access control data region, and wherein a number of the segment regions to which the corresponding access control data applies, is limited a predetermined value; and
recording status information for indicating status of each access control data region on at least one management area, the status information indicating at least whether the access control data region is defective or not.
12. The method of claim 11, wherein the access control data includes a predetermined rule for controlling the access to the recording medium when the access control data is not identified by a recording/reproducing device.
13. The method of claim 12, wherein the predetermined rule is used when a version of the access control data is not identified by the recording/reproducing device.
14. The method of claim 11, wherein the status information further indicates whether the access control data stands recorded on the corresponding access control data region.
15. The method of claim 11, wherein the status information of the defective access control data region indicates that the corresponding access control data region is invalid.
16. The method of claim 11, wherein the status information of the next normal access control data region indicates that the corresponding access control data region is valid.
17. The method of claim 11, wherein the control data area includes a first control data area for storing first access control data and a second control data area for storing second access control data which is a copy of the first access control data, and the management area includes a first management area for storing status information of the first access control data and a second management area for storing status information of the second access control data.
18. The method of claim 17, wherein if the first control data area includes the defective access control data region, the access control data regions in the first and second control data areas are skipped.
19. The method of claim 11, wherein if the access control data region is found to be defective during recording of the access control data, the defective access control data region is skipped.
reading status information for indicating status of each access control data region from a management area, the status information indicating at least whether or not the access control data region is defective; and
reading access control data from the access control data regions in at least one control data area based on the status information, the access control data controlling an access to a plurality of segment regions of a user data area in the recording medium and enlarging a reproduction compatibility of the recording medium, wherein the access control data is read from not a defective access control data region but a next normal access control data region, and wherein a number of the segment regions to which the corresponding access control data applies, is limited to a predetermined value.
accessing a recording/reproducing device to the recording medium based on a predetermined rule in the access control data when the access control data is not identified by the recording/reproducing device.
22. The method of claim 21, wherein the predetermined rule is used when a version of the access control data is not identified by the recording/reproducing device.
23. The method of claim 20, wherein the status information further indicates whether the access control data stands recorded on the corresponding access control data region.
24. An apparatus for recording/reproducing data on/from a recording medium, comprising:
a pickup configured to record/reproduce the data on/from the recording medium; and
a controller configured to control the pickup to record access control data on a plurality of access control data regions in at least one control data area, the access control data controlling an access to a plurality of segment regions of a user data area in the recording medium and enlarging a reproduction compatibility of the recording medium, and to record status information for indicating status of each access control data region on at least one management area, the status information indicating at least whether the access control data region is defective or not,
wherein a defective access control data region is skipped, and the access control data is recorded on a next normal access control data region, and
wherein a number of the segment regions to which the corresponding access control data applies, is limited to a predetermined value.
25. The apparatus of claim 24, wherein the access control data includes a predetermined rule for controlling the access to the recording medium when the access control data is not identified by the controller.
26. The apparatus of claim 25, wherein the controller is configured to control the pickup to access the recording medium based on the predetermined rule when the controller cannot identify a version of the access control data.
27. The apparatus of claim 24, wherein the status information further indicates whether the access control data stands recorded on the corresponding access control data region.
a controller configured to control the pickup to read status information from a management area and access control data from access control data regions in a control data area, and to access the recording medium based on the status information and the access control data,
wherein the status information indicates at least whether or not each access control data region is defective, and the access control data controls an access to a plurality of segment regions of a user data area in the recording medium and enlarges a reproduction compatibility of the recording medium, and wherein the access control data is read from not a defective access control data region but a next normal access control data region, and wherein a number of the segment regions to which the corresponding access control data applies, is limited to a predetermined value.
29. The apparatus of claim 28, wherein the controller is configured to control the pickup to read the status information and then the access control data based on the read status information.
30. The apparatus of claim 28, wherein the controller is configured to control the pickup to access the recording medium based on a predetermined rule in the access control data if the controller can not identify a version of the access control data.
31. The apparatus of claim 30, wherein the status information further indicates whether the access control data stands recorded on the corresponding access control data region.
32. The apparatus of claim 28, further comprising a host device for generating a command for recording/reproducing the data to the controller.
33. The recording medium of claim 1, wherein the access control information further includes indication information for indicating whether the corresponding access control information was previously used to control the access.
34. The recording medium of claim 33, wherein the indication information further indicates whether the corresponding access control information is available for re-use.
35. The recording medium of claim 1, wherein the control data area includes the access control data regions for sequentially storing at least two versions of the access control data.
This application claims the benefit of Korean Patent Application No. 10-2004-0039142, filed on May 31, 2004, in the Korean Intellectual Property Office, the entire contents of which are hereby incorporated by reference.
This application is a continuation of U.S. application Ser. No. 11/061,666, filed Feb. 22, 2005, the entire contents of which are hereby incorporated by reference.
This application also claims the benefit of priority under 35 U.S.C. �119(e) of U.S. provisional application Ser. No. 60/554,356 filed on Mar. 19, 2004, U.S. provisional application Ser. No. 60/566,090 filed on Apr. 29, 2004, and U.S. provisional application Ser. No. 60/577,181 filed on Jun. 7, 2004, the entire contents of each of which are hereby incorporated by reference.
One example embodiment includes a recording medium having at least one control data area storing control data in a recording unit. The control data may be used for managing access to the recording medium. At least one management area stores status information for the control data area, wherein an invalid recording unit in the control data area is skipped and next available recording unit is used.
Another exemplary embodiment includes a method of recording to a recording medium. A control data is recorded in a recording unit of the at least one control data area. The control data may be used for managing access to the recording medium, wherein an invalid recording unit in the at least one control data area is skipped and next available recording unit is recorded.
Another example embodiment includes a method of reproducing from a recording medium. A control data is recorded in a recording unit of the at least one control data area. The control data may be used for managing access to the recording medium, wherein an invalid recording unit in the at least one control data area is skipped, and recording status information for the skipped recording unit as invalid status.
Another example embodiment provides for an apparatus for recording to and/or reproducing from a recording medium. An optical unit records data on the recording medium or reproduces data from the recording medium. A control unit controls the optical unit to record or reproduce the data based on at least one control data and status information for the control data. If at least one recording unit in a control data area is found to be invalid during recording or reproducing, the control unit controls the optical unit to skip the invalid recording unit and to use next available recording unit.
An example structure of a PAC recorded on a PAC zone will now be described in detail with reference to the accompanying drawings. FIG. 1 illustrates an overall structure of a high density optical write-once disc according to an example embodiment of the present invention. Referring to FIG. 1, the high density optical write-once disc may be partitioned, from an inner circumference to an outer circumference, into a lead-in zone, a data zone, and a lead-out zone. The lead-in zone may further include a temporary disc management area (TDMA) further including defect management and recording management zones of the optical disc. For a high density optical write-once disc, the TDMA can physically record data on the disc only once. Accordingly, in order to record defect management and recording management information on the disc, which can be updated one or more times during the life of the disc, additional TDMAs may be also be included in an inner spare area (ISA) or an outer spare area (OSA) within the data zone. A TDMA may include a first physical sector number of a defect list, a temporary disc definition structure (TDDS) containing information, such as the location of the data zone, and/or a temporary defect list (TDFL).
A more detailed structure of the above-mentioned example PAC having information recorded thereon is described with reference to FIG. 4. A more detailed description of a field of the PAC will follow with reference to a drawing illustrating the specific field corresponding to the PAC. FIG. 4 illustrates a PAC in a high density optical write-once disc according to an example embodiment of the present invention. Referring to FIG. 4, the PAC may include a header portion (up to 384 bytes of the first frame) and an area having specific information specific to the drive recorded thereon. More specifically, the header portion may include 3 bytes of “PAC_ID”, 1 byte of “PAC format”, 4 bytes of “PAC Update Account”, 4 bytes of “Unknown PAC Rules”, 1 byte of “Entire_Disc_Flags”, 1 byte of “Number of Segments”, and/or 32 “segments (Segment_0∞Segment_31) each having 8 bytes.
The “Number of Segments” field may indicate the number of segment areas being applied to the PAC. The segment may include a maximum number (for example, 32) of segments that can be allocated to one PAC. Information on the allocated segments may be written on fields of “Segment—0” to “Segment—31”, each which may include 8 bytes. The first physical sector number (PSN) of the first cluster in the segment area of the first 4 bytes may be recorded on each of the “Segment—0” field to the “Segment—31” field.
Further, as shown in part (c) of FIG. 12, when recording a next valid PAC 2, a copy of the valid PAC 2 may be recorded in the PAC1 zone of the INFO 1 zone. At this point, an error may occur during the process of recording the valid PAC 2 in the PAC1 zone of the INFO1 zone. If an error occurs, the valid PAC 2 may be recorded on a next recordable zone subsequent to the error zone. Accordingly, by recording the valid PAC 2, the PAC status information representing the PAC2 zone may be updated from ‘00’, which initially indicated that PAC 2 was an unrecorded zone, to ‘11’. Moreover, since an error occurred during the process of recording the valid PAC 2, the PAC status information representing the PAC1 zone may be updated from ‘00’ to ‘10’. Further, because the valid PAC 2 is recorded on a next recordable zone, the PAC status information is updated from ‘00’ to ‘11’.
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