Source: http://www.google.com/patents/US8179758?ie=ISO-8859-1
Timestamp: 2015-05-23 09:03:11
Document Index: 313430591

Matched Legal Cases: ['Application No. 2002', 'Application No. 2001', 'Application No. 03754294', 'Application No. 200710006544', 'Application No. 2004', 'Application No. 2004', 'Application No. 2004', 'Application No. 200380102288', 'Application No. 2004', 'Application No. 2002', 'Application No. 03754294']

Patent US8179758 - Optical disc having tracking polarity information, and apparatuses and ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn optical disc includes tracking polarity information. The optical disc includes a clamping area, a lead-in area, a data area, and burst cutting area (BCA). The BCA is present between the clamping area and the lead-in area and in which information regarding the optical disc is recorded, and the information...http://www.google.com/patents/US8179758?utm_source=gb-gplus-sharePatent US8179758 - Optical disc having tracking polarity information, and apparatuses and methods for recording and reproducing user data on the sameAdvanced Patent SearchPublication numberUS8179758 B2Publication typeGrantApplication numberUS 11/940,072Publication dateMay 15, 2012Filing dateNov 14, 2007Priority dateNov 4, 2002Also published asCA2503355A1, CA2503355C, CN1311441C, CN1708791A, CN100511437C, CN101017671A, EP1561207A1, EP1561207A4, US7362691, US7369472, US7898917, US20040085877, US20070030779, US20080062835, US20080068961, US20080072245, US20080080338, US20080080350, US20080094956, US20080094957, US20080094983, US20080094984, US20080094985, US20080094995, US20080095023, US20080095033, US20080095034, US20080101207, US20080106993, US20080107001, US20080107002, US20080107003, WO2004042711A1Publication number11940072, 940072, US 8179758 B2, US 8179758B2, US-B2-8179758, US8179758 B2, US8179758B2InventorsKyung-geun Lee, In-sik Park, Jung-Wan Ko, Du-seop YoonOriginal AssigneeSamsung Electronics Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (61), Non-Patent Citations (34), Classifications (13) External Links: USPTO, USPTO Assignment, EspacenetOptical disc having tracking polarity information, and apparatuses and methods for recording and reproducing user data on the same
US 8179758 B2Abstract
An optical disc includes tracking polarity information. The optical disc includes a clamping area, a lead-in area, a data area, and burst cutting area (BCA). The BCA is present between the clamping area and the lead-in area and in which information regarding the optical disc is recorded, and the information is read before performing tracking in the data area. Accordingly, it is possible to obtain the tracking polarity information and/or reflectivity information without trial and error and directly record or reproduce user data in a data area of the optical disc
1. An apparatus for processing data recorded in an information storage medium comprising a burst cutting area, a lead-in area, and a data area, the data area having a plurality of tracks formed therein, the apparatus comprising:
an optical pickup arranged to emit a light to the information storage medium to transfer data with respect to the information storage medium comprising two recording layers, one of the two recording layers comprising the burst cutting area in which a first physical format of data is recorded, and the first physical format of data comprising tracking polarity information for each of the two recording layers; and
a controller arranged to control the optical pickup:
to reproduce the tracking polarity information from the burst cutting area before the pickup follows the tracks formed in the data area on the information storage medium comprising a second physical format of data, and
to control the optical pickup to use the tracking polarity information in following the tracks formed in the data area on the information storage medium,
wherein the burst cutting area further comprises information that indicates whether disc information is recorded as the first physical format of data in the burst cutting area.
2. The apparatus of claim 1, wherein the burst cutting area further comprises information that indicates whether disc information is recorded in a block of the burst cutting area.
3. The apparatus of claim 2, wherein, when the information indicates that disc information is recorded in the block of the burst cutting area, the disc information comprises the tracking polarity information.
4. An information storage medium comprising two recording layers, the information storage medium comprising a burst cutting area, a lead-in area, and a data area, the data area having a plurality of tracks formed therein, wherein:
one of the two recording layers comprises the burst cutting area in which a first physical format of data is recorded;
the first physical format of data comprises tracking polarity information for each of the two recording layers; and
the tracking polarity information is read before a pickup follows the tracks formed in the data area on the information storage medium comprising a second physical format of data, and is used in following the tracks formed in the data area on the information storage medium,
5. The information storage medium of claim 4, wherein:
the first physical format of data is data which is recorded in a form of stripe in a radial direction; and
the second physical format of data is a pit which is formed in a tracking direction.
6. The information storage medium of claim 4, wherein the burst cutting area is arranged between a clamping area and a lead-in area in corresponding recording layer.
7. The information storage medium of claim 4, wherein the burst cutting area further comprises information that indicates whether disc information is recorded in a block of the burst cutting area.
8. The information storage medium of claim 7, wherein, when the information indicates that disc information is recorded in the block of the burst cutting area, the disc information comprises the tracking polarity information.
9. The information storage medium of claim 4, wherein the second physical format of data is reflectivity information and is recorded with a pattern of crystalline marks.
10. The information storage medium of claim 4, wherein the second physical format of data is reflectivity information and is recorded with a pattern of non-crystalline marks.
11. A method for processing data recorded in an information storage medium comprising a plurality of recording layers, at least one of the recording layers comprising a burst cutting area, a lead-in area, and a data area, the burst cutting area having striped bar data formed therein, and the data area having a plurality of tracks formed therein, the method comprising:
reproducing tracking polarity information for each of the recording layers from the burst cutting area before a pickup follows the tracks formed in the lead-in area and the data area on the information storage medium,
reproducing data from the information storage medium using the tracking polarity information for each of the recording layers, in following the tracks formed in the data area on the information storage medium,
wherein the burst cutting area further comprises information that indicates whether disc information is recorded in the burst cutting area.
12. The method of claim 11, wherein the tracking polarity information is data which is formed radially in the burst cutting area in a bar shape.
13. The method of claim 11, wherein the burst cutting area further comprises information that indicates whether disc information is recorded in a block of the burst cutting area.
14. The method of claim 13, wherein, when the information indicates that disc information is recorded in the block of the burst cutting area, the disc information comprises the tracking polarity information.
15. An apparatus for processing data recorded in an information storage medium comprising a plurality of recording layers, at least one of the recording layers comprising a burst cutting area, a lead-in area, and a data area, the burst cutting area having striped bar data formed therein, and the data area having a plurality of tracks formed therein, the apparatus comprising:
a pickup which emits or receives a light to transfer data with respect to the information storage medium; and
a controller which controls the pickup to:
reproduce tracking polarity information for each of the recording layers from the burst cutting area, before the pickup follows the tracks formed in the data area on the information storage medium; and
reproduce data from the information storage medium using the tracking polarity information for each of the recording layers in following the tracks formed in the data area on the information storage medium,
16. The apparatus of claim 15, wherein the burst cutting area further comprises information that indicates whether disc information is recorded in a block of the burst cutting area.
17. The apparatus of claim 16, wherein, when the information indicates that disc information is recorded in the block of the burst cutting area, the disc information comprises the tracking polarity information.
18. An information storage medium comprising a first recording layer and a second recording layer, one of the recording layers comprising a burst cutting area, a lead-in area, and a data area, the burst cutting area having striped bar data formed therein, and the data area having a plurality of tracks formed therein, wherein:
the burst cutting area, which is arranged in one of the first recording layer and the second recording layer, comprises
tracking polarity information for each of the first and second recording layers; and
the tracking polarity information is reproduced before a pickup follows the tracks formed in the data area on the information storage medium,
19. The information storage medium of claim 18, wherein the burst cutting area further comprises information that indicates whether disc information is recorded in a block of the burst cutting area.
20. The information storage medium of claim 19, wherein, when the information indicates that disc information is recorded in the block of the burst cutting area, the disc information comprises the tracking polarity information. Description
This application is a continuation of application Ser. No. 10/695,393 filed on Oct. 29, 2003, now U.S. Patent No. 7,362,691, which claims the benefit of Korean Patent Application No. 2002-67968 filed on Nov. 4, 2002, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.
A pickup, which is included in an optical disc reproducing apparatus, detects a precise position of a track in which the user data is recorded, receives a laser beam reflected from the track, and reads the user data from the laser beam. A signal that the pickup uses to detect a position of a desired track is called a tracking signal. The tracking signal is obtained when a photodiode, which has a plurality of light receiving parts, receives the laser beam. Signals are generated from light received by the respective light receiving parts, and then, the signals are added together or subtracted from each other. The tracking signal has an S-shape and right and left sides of the tracking signal, which are divided with respect to a central point of the tracking signal, have opposite polarities.
According to still another aspect of the present invention, there is provided an optical disc recording apparatus including a controller creating at least one of tracking polarity information and reflectivity information; and a recording unit recording the at least one of tracking information and reflectivity information created by the controller in a burst cutting area (BCA) of an optical disc.
FIG. 3 is a schematic block diagram of the optical disc 100, according to an aspect of the present invention. Referring to FIG. 3, a first recording layer l0 is formed on the optical disc 100. The first recording layer l0 includes a clamping area C, the BCA B, a lead-in area LI, and a lead-out area LO. The clamping area C is an area that is pressurized by a clamping tool in order to clamp the optical disc 100. In general, the clamping area C is circular band shaped and formed in an inner portion of the optical disc 100. The BCA B is an area in which the tracking polarity information and/or the reflectivity information is recorded. The particulars of the optical disc 100, such as a corresponding serial number and manufacturing date, may be further recorded in the BCA B. A data area in which the user data is recorded, is present between the lead-in area LI and the lead-out area LO. If the first recording layer l0 is formed of a phase change material (PCM), the tracking polarity information and/or the reflectivity information may be recorded with a pattern of crystalline and/or non-crystalline marks. A method of recording information in the BCA B is disclosed in Korean Patent Application No. 2001-47957 entitled “Optical Disc and Methods for Recording and Reproducing Essential Information of Optical Disc,” also filed by the present applicant.
FIGS. 4A and 4B are schematic block diagrams of the optical disc 100, according to another aspect of the present invention. Referring to FIGS. 4A and 4B, the first recording layer l0 and a second recording layer l1 are formed on the optical disc 100. Each of the first recording layer l0 and the second recording layer l1 includes the clamping area C, the lead-in area LI, and the lead-out area LO. The data area in which the user data is recorded is present between the lead-in area LI and the lead-out area LO. The clamping area C, the lead-in area LI, and the lead-out area LO are the same as those explained with respect to FIG. 3, and therefore, their descriptions will not be repeated here. Further, the BCA B is present between the clamping area C and the lead-in area LI of the first recording layer l0. The tracking polarity information and/or the reflectivity information is recorded in the BCA B, according to an aspect of the present invention. The particulars of the optical disc 100, such as the corresponding serial number and the manufacturing date, may be further recorded in the BCA B. If the first recording layer l0 is formed of the phase change material (PCM), the tracking polarity information and/or the reflectivity information may be recorded with the pattern of the crystalline and/or the non-crystalline marks.
FIGS. 5A and 5B are schematic block diagrams of the optical disc 100, according to still another aspect of the present invention. Referring to FIGS. 5A and 5B, the first recording layer l0 and the second recording layer l1 are formed on the optical disc 100. Each of the first recording layer l0 and the second recording layer l1 includes a clamping area C, a lead-in area LI, and a lead-out area LO. The data area in which the user data is recorded is present between the lead-in area LI and the lead-out area LO. The clamping area C, the lead-in area LI, and the lead-out area LO are the same as those explained with respect to FIG. 3, and therefore, their descriptions will not be repeated here. According to an aspect of the present invention, the BCA B is formed on the second recording layer l1, unlike in FIGS. 4A and 4B in which the BCA B is present on the first recording layer l0. That is, the BCA B of FIGS. 5A and 5B is present between the clamping area C and the lead-in area LI of the second recording layer l1. If the second recording layer l1 is formed of the phase change material (PCM), the tracking polarity information or reflectivity information may be recorded with a pattern of crystalline and/or non-crystalline marks.
FIG. 6A illustrates a data structure of the BCA of the optical disc 100, according to an aspect of the present invention. Referring to FIG. 6A, the tracking polarity information is recorded in the BCA, according to an aspect of the present invention. The tracking polarity information provides the polarity of the tracking signal related to the optical disc 100. The tracking signal has an S-shape and corresponding right and left sides, which are divided with respect to the central point of the tracking signal, have opposite polarities. The polarity of the tracking signal changes according to a type of the optical disc 100, or physical characteristics of the recording layer such as the physical characteristics of a pit or a track. In other words, the polarities of the tracking signal change from (−) to (+) and (+) to (−) according to the type of the optical disc 100 or the physical characteristics of the recording layer. The particulars of the optical disc 100 may be further recorded in the BCA, as well as the tracking polarity information.
FIG. 7 illustrates a data structure of the information recorded in the BCA of the optical disc 100, according to an aspect of the present invention. In detail, FIG. 7 shows an example of the BCA in the optical disc 100 having two recording layers as shown in FIGS. 4A, 4B, 5A, and 5B. The tracking polarity information is repeatedly recorded four times in the BCA and the recording begins at leading bytes of the BCA. The first two bits b1 b0 of the tracking polarity information are identifiers of the respective information that is repeatedly recorded. If the first two bits b1b0 are 00, the information indicates that first tracking polarity information is recorded in the BCA. If the first two bits b1b0 are 01, the information indicates that second tracking polarity information is recorded in the BCA. If the first two bits b1b0 are 10, the information indicates that third tracking polarity information is recorded in the BCA. If the first two bits blb0 are 11, the information indicates that fourth tracking polarity information is recorded in the BCA. Repetitive recording of the information increases a robustness of the information. Even if an error occurs in one of the repeated recordings, it is possible to read desired information from the other recordings. The other six bits b7b6b5b4b3b2 provide the information. The bit b2 includes flag information indicating whether or not other information, i.e., the particulars of the optical disc 100, is recorded in the BCA. If the bit b2 is 0, the information indicates that the other information is not recorded in the BCA. If the bit b2 is 1, the information indicates that the other information is recorded in the BCA. The bits b7b6b5b4b3 represent the tracking polarity information and can be defined as follows:
00000: first recording layer=type A, second recording layer=type B 00001: first recording layer=type B, second recording layer=type A 00010: first recording layer=second recording layer=type A 00011: first recording layer=second recording layer=type B For instance, when the other information is not recorded in the BCA, and the polarities of the tracking signals related to the first and second recording layers are type B and type A, respectively, the six bits b7b6b5b4b3b2 is expressed as ‘000010’. When the other information, such as the particulars of the optical disc 100, is recorded in the BCA and both polarities of the tracking signals related to the first and second recording layers are type A, the six bits b7b6b5b4b3b2 is expressed as ‘000101’.
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No. 11/959,888, filed Dec. 19, 2007, Kyung-geun Lee, et al., Samsung Electronics Co., Ltd.34U.S. Appl. No. 11/959,903, filed Dec. 19, 2007, Kyung-geun Lee, et al., Samsung Electronics Co., Ltd.Classifications U.S. Classification369/52.1, 369/275.1, 369/44.11International ClassificationG11B7/00, G11B7/007, G11B7/09Cooperative ClassificationG11B7/0945, G11B2007/0006, G11B7/004, G11B7/00736European ClassificationG11B7/007R, G11B7/09M, G11B7/004RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services