Source: http://www.google.com/patents/US7609604?dq=7,453,150
Timestamp: 2017-04-24 20:21:23
Document Index: 273884031

Matched Legal Cases: ['Application No. 200480000399', 'Application No. 200480000399', 'Application No. 04703541', 'Application No. 04705015', 'Application No. 04703531', 'Application No. 06001615', 'Application No. 04703277', 'Application No. 04703529', 'Application No. 070184', 'Application No. 07018289', 'Application No. 06001616', 'Application No. 2006', 'Application No. 2006', 'Application No. 2006', 'Application No. 2006', 'Application No. 2006', 'Application No. 2006', 'Application No. 2006', 'Application No. 10', 'Application No. 10', 'Application No. 2006', 'Application No. 2008', 'Application No. 10', 'Application No. 2006', 'Application No. 2006109209', 'Application No. 95113498']

Patent US7609604 - Recording medium with intermittent or alternate wobbled pits and apparatus ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA recording medium, such as a high-density and/or read-only recording medium, such as BD-ROM, which contains a control information, 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...http://www.google.com/patents/US7609604?utm_source=gb-gplus-sharePatent US7609604 - Recording medium with intermittent or alternate wobbled pits and apparatus and methods for forming, recording, and reproducing the recording mediumAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7609604 B2Publication typeGrantApplication numberUS 10/762,538Publication dateOct 27, 2009Filing dateJan 23, 2004Priority dateJan 23, 2003Fee statusPaidAlso published asCA2487406A1, CA2487406C, DE602004030317D1, EP1586088A1, EP1586088A4, EP1586088B1, EP1586090A1, EP1586090A4, EP1586090B1, EP1653456A2, EP1653456A3, EP1653456B1, EP1870886A1, EP1962287A1, US7599274, US7908488, US8707055, US20040165494, US20040168074, US20060164944, US20080043607, WO2004066285A1, WO2004066286A1Publication number10762538, 762538, US 7609604 B2, US 7609604B2, US-B2-7609604, US7609604 B2, US7609604B2InventorsSang Woon Suh, Jin Yong KimOriginal AssigneeLg Electronics Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (108), Non-Patent Citations (45), Referenced by (1), Classifications (50), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetRecording medium with intermittent or alternate wobbled pits and apparatus and methods for forming, recording, and reproducing the recording medium
US 7609604 B2Abstract
A recording medium, such as a high-density and/or read-only recording medium, such as BD-ROM, which contains a control information, 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.
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, pits in other portions of the tracks of the control data area are formed as straight pits, and the wobbled pits are formed intermittently and alternately with the straight pits within the control data area, wherein control information is encoded along the wobbled pits in such a way that data bit “0” and “1” comprising the control information are represented by a transition within a predetermined period of the wobbled pits and each data bit is distinguished from each other by the transition direction within the predetermined period, and wherein the control data area includes a plurality of data units, and the wobbled pits are formed in at least one data unit preceded by the straight pits or followed by the straight pits.
2. The recording medium according to claim 1, wherein the control information includes protection information used for controlling at least one of reproduction and recording of main data.
3. The recording medium according to claim 2, wherein the protection information is repeatedly encoded in plural arrays of the wobbled pits.
4. The recording medium according to claim 1, wherein the control information in the control data area is recorded along the wobbled pits while being encoded by bi-phased modulation.
5. The recording medium according to claim 1, wherein the control data area comprises arrays of the wobbled pits and arrays of the strait pits periodically.
6. The recording medium according to claim 1, wherein arrays of the wobbled pits and arrays of the straight pits in the control data area are of different length.
7. The recording medium according to claim 1, further comprising:
a main data area including main data recorded with modulation in straight pits formed along tracks.
8. The recording medium according to claim 1, wherein the wobbled pits are formed in more than two data units different from a first data unit.
9. The recording medium according to claim 8, wherein the plurality of data units comprise one address unit, and the wobbled pits are formed in more than two data units different from the first data unit within the address unit.
10. The recording medium according to claim 9, wherein the wobbled pits are formed in a plurality of address units.
forming pits in a control data area along tracks, with data recorded therein, wherein pits in some portions of the tracks are formed as wobbled pits, pits in other portions of the tracks of the control data area are formed as straight pits, and the wobbled pits are formed intermittently and alternately with the straight pits within the control data area,
wherein the step of forming pits includes encoding control information along the wobbled pits in such a way that data bit “0” and “1” comprising the control information are represented by a transition within a predetermined period of the wobbled pits and each data bit is distinguished from each other by the transition direction within the predetermined period, and wherein the control data area includes a plurality of data units, and the step of forming pits includes forming the wobbled pit in at least one data unit preceded by the straight pits or followed by the straight pits.
12. The method according to claim 11, wherein the control information includes protection information used for controlling at least one of reproduction and recording of main data.
13. The method according to claim 12, wherein the step of encoding control information repeatedly encodes the same protection information in plural arrays of the wobbled pits.
14. The method according to claim 11, wherein the step of encoding control information encodes the wobbled pits by bi-phased modulation.
15. The method according to claim 11, wherein the control data area comprises arrays of the wobbled pits arid arrays of the strait pits periodically.
16. The method according to claim 11, wherein the step of forming pits forms arrays of the wobbled pits and arrays of the straight pits having different lengths respectively in the control data area.
17. The method according to claim 11, wherein the step of forming pits forms the wobbled pits in more than two data units different from a first data unit.
18. The method according to claim 17, wherein the step of forming pits includes comprising the plurality of data units into one address unit, and wherein the wobbled pits are formed in more than two data units different from the first data unit within the address unit.
19. The method according to claim 18, wherein the wobbled pits are formed in a plurality of address units.
20. A method of reproducing data from are 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, pits in other portions of the tracks of the control data area are formed as straight pits, and the wobbled pits are formed intermittently and alternately with the straight pits within the control data area,
wherein the step of detecting data includes detecting control information encoded along the wobbled pits, data bit “0” and “1” comprising the control information are represented by a transition within a predetermined period of the wobbled pits and each data bit is distinguished from each other by the transition direction within the predetermined period, and
wherein the control data area includes a plurality of data units, and the step of detecting control information includes detecting the wobbled pits from at least one data unit preceded by the straight pits or followed by the straight pits; and
utilizing the control information to reproduce main data recorded with modulation in straight pits formed along tracks of a main data area of the recording medium.
21. The method according to claim 20, wherein the step of detecting data comprises:
converting signals reflected from the wobbled pits into electrical signals; and
extracting the control information by applying the electrical signals to a logic circuit.
reproducing the main data using the control information, and
outputting the reproduced main data.
23. The method according to claim 20, wherein the step of detecting control information detects the control information recorded in pits from a difference signal between a right and a left electric signals, generated by a beam reflected from the pits formed along the tracks.
24. The method according to claim 23, wherein the step of detecting data further detects the main data from a high-frequency electric signal generated by a beam reflected from the straight pits.
25. The method according to claim 20, wherein the control information includes protection information for controlling at least one of reproduction and recording of main data, and
wherein the step of detecting control information detects the protection information.
26. The method according to claim 20, wherein the step of detecting control information detects the control information recorded in the wobbled pits by bi-phased modulation, in the control data area.
27. The method according to claim 20, wherein the step of detecting pits detects arrays of the wobbled pits and arrays of the straight pits having different lengths respectively in the control data area.
28. The method according to claim 20, wherein the step of detecting control information includes detecting the wobbled pits formed in more than two data units different from a first data unit.
29. The method according to claim 28, wherein the plurality of data units comprise one address unit, and wherein the step of detecting control information includes detecting the wobbled pits formed in more than two data units different from the first data unit within the address unit.
30. The method according to claim 29, wherein the wobbled pits are formed in a plurality of address units, and wherein the step of detecting control information includes detecting the wobbled pits formed in the plurality of address units.
31. 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, with data recorded therein, wherein pits in some portions of the tracks are formed as wobbled pits, pits in other portions of the tracks of the control data area are formed as straight pits, and the wobbled pits are recorded intermittently and alternately with the straight pits, wherein control information is encoded along the wobbled pits in such a way that data bit “0” and “1” comprising the control information are represented by a transition within a predetermined period of the wobble pits and each data bit is distinguished from each other by the transition direction within the predetermined period, wherein the control data area includes a plurality of data units, and the wobbled pits are formed in at least one data unit preceded by the straight pits or followed by the straight pits, and wherein the detection unit converts signals reflected from the pits into electric signals; and
a signal processor, coupled to the detection unit, configured to process the electric signals to generate the control information and to process main data recorded with modulation in straight pits formed along tracks of a main data area of the recording medium.
32. The apparatus according to claim 31, wherein the signal processor is configured to generate the control information from low-frequency components and generate the main data from high-frequency components.
a controller, coupled to said detection unit and said signal processor, configured to control the detection of the control information and the processing of the main data, wherein the controller is configured to control said signal processor to output the main data based on the control information.
34. The apparatus according to claim 33, wherein the controller is configured to control said detection unit to detect the control information by a push-pull method.
35. The apparatus according to claim 33, wherein the control information includes protection information used for controlling at least one of reproduction and recording of the main data, and
wherein the controller is configured to control the reproduction of the main data in response to the protection information.
36. The apparatus according to claim 31, wherein the detection unit is configured to detect the wobbled pits formed in more than two data units different from a first data unit.
37. The apparatus according to claim 36, wherein the plurality of data units comprise one address unit, and wherein the detection unit is configured to detect the wobbled pits formed in more than two data units different from the first data unit within the address unit.
38. The apparatus according to claim 37, wherein the wobbled pits are formed in a plurality of address units, and wherein the detection unit is configured to detect the wobbled pits formed in the plurality of address units.
As described above, the disc information contained in the PIC area of a BD-RE may be encoded in a wobbled groove by HFM. If the disc information is recorded in the PIC zone of a BD-ROM as straight pits, an optical disk reproducing apparatus should be able to apply different detecting schemes to obtain the disc information depending on the disk type (BD-RE or BD-ROM). Unless the correct scheme is chosen, the optical disk reproducing apparatus will fail to detect the disc information. For example, if a method for detecting BFM-modulated disc information encoded in a wobbled groove of a BD-RE is applied to a BD-ROM, the optical disk reproducing apparatus will not be able to retrieve the disc information which is recorded in the PIC zone as straight pits.
In an exemplary embodiment, the PIC zone may contain 2,720 clusters of data. The first cluster may contain disc information recorded as wobbled pits by biphase modulation. The other clusters may contain 17PP modulated disc information and copy protection information having ECC blocks of size 64 KB and recorded as straight pits, for example the disc information recorded as wobbled pits may be detected by a push-pull signal detecting method and the disc information and copy protection information recorded as straight pits may be detected by an RF signal detecting method. The push-pull signal typically has lower frequency components than the RF signal.
As shown in FIG. 5, it is preferable that an intermittent wobble structure is recorded on the area instead of a continuous wobble pit structure in order to ensure secrecy or the robustness, such that it prevents a copy protection information from being easily detected by a common detecting method.
All of the arrays of straight pits can be made to have the same length and all of the arrays of wobbled pits can be made to have the same length. If the arrays of pits are of different length, that is, if An≠Am (n≠m) and Bn≠Bm (n≠Am), the occurrence of the arrays of wobbled pits is not periodic. This can enhance the security of the copy protection information in that the probability that special information is encoded in wobbled pits becomes lower.
FIG. 7 illustrates the disc information encoded in wobbled pits by bi-phase modulation and a circuit for detecting the information, wherein an exemplary value of ‘0101’ is encoded in_bi-phase modulated form, e.g., bi-phase modulated HFM Groove, along with wobbled pits. In this example, a data bit is recorded as marks and spaces of length 36T including six 3T marks. Six pits representing ‘1’ and six pits representing ‘0’ are shifted from the track center in the opposite directions.
As shown in FIG. 7. the structure by bi-phase modulation is different from the structure illustrated in FIG. 2. That is, the method of FIG. 2 has a bit with value 0, which is represented by a transition at the start of the bit cell and a bit with value 1, which is represented by a transition at the start and in the middle of the bit cell. Otherwise, the method of FIG. 7 has a bit with value 0, which is represented by a transition at the start of low and in the middle of high, and a bit with value 1, which is represented by the transition in the opposite direction. The combination of bits consists of data to detect information recorded as wobbled pit. The information can be copy protection information, i.e., key data to decrypt main data recorded on the data zone of the recording medium as shown in FIG. 4A to 4F That is, the wobbled pit data can be reproduced or detected only when the bi-phased modulation data modulated by HFM is detected or reproduced normally. And also, reproduction or decryption of main data is possible only when the wobbled pit data for copy protection is reproduced or detected using the normally detected or reproduced bi-phase modulation data.
For example, if the 2-bit data is 00 b, the corresponding optical disk is a BD-RE. If the data is 01 b, the corresponding optical disk is a one-time recordable BD-R. If the data is 10 b, the corresponding optical disk is a BD-ROM.
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No. 10/762,516.* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS20080290952 *Jun 20, 2005Nov 27, 2008Mekexis NvDvd Reading Apparatus* Cited by examinerClassifications U.S. Classification369/59.25, 369/275.3, 369/47.27, 369/275.4International ClassificationG11B27/19, G11B7/24, G11B7/007, G11B20/12, G11B7/005, G11B20/00, G11B27/24Cooperative ClassificationG11B7/0053, G11B2220/20, G11B20/00268, G11B20/00304, G11B2020/1238, G11B7/24082, G11B20/1426, G11B20/00115, G11B20/00601, G11B2220/213, G11B20/00086, G11B27/24, G11B2020/1239, G11B2220/2541, G11B20/00492, G11B2020/1279, G11B2220/216, G11B20/10, G11B7/00736, G11B27/19, G11B2020/122, G11B19/122, G11B20/1217, G11B2220/218European ClassificationG11B20/14A2B, G11B20/10, G11B20/00P6B2, G11B20/00P5G1, G11B20/00P5A6A1, G11B7/24082, G11B20/00P1C, G11B20/00P5A6D1, G11B19/12C, G11B7/005W, G11B27/24, G11B20/12D, G11B27/19, G11B20/00P, G11B7/007RLegal EventsDateCodeEventDescriptionMay 7, 2004ASAssignmentOwner name: LG ELECTRONICS INC., KOREA, REPUBLIC OFFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SUH, SANG WOON;KIM, JIN YONG;REEL/FRAME:015306/0066;SIGNING DATES FROM 20040322 TO 20040323Mar 15, 2013FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services