Source: https://patents.google.com/patent/US8310907B2/en
Timestamp: 2018-11-21 02:53:51
Document Index: 571019397

Matched Legal Cases: ['Application No. 10', 'Application No. 200480000820', 'Application No. 200710162346', 'Application No. 200710162347', 'Application No. 2004122401', 'Application No. 2004122412', 'Application No. 2005120173', 'Application No. 2006', 'Application No. 2006', 'Application No. 556154', 'Application No. 601909', 'Application No. 2006', 'Application No. 10', 'Application No. 2004122413', 'Application No. 04', 'Application No. 2006107926', 'Application No. 2007135326', 'Application No. 06012044', 'Application No. 06012045', 'Application No. 07016686', 'Application No. 093124591', 'Application No. 095121964']

US8310907B2 - Recording medium, method of configuring control information thereof, recording and/or reproducing method using the same, and apparatus thereof - Google Patents
US8310907B2
US8310907B2 US10883667 US88366704A US8310907B2 US 8310907 B2 US8310907 B2 US 8310907B2 US 10883667 US10883667 US 10883667 US 88366704 A US88366704 A US 88366704A US 8310907 B2 US8310907 B2 US 8310907B2
US10883667
US20050007853A1 (en )
A recording medium having a data structure of a control information recorded on the recording medium or to be recorded/reproduced on/from the recording medium, characterized in that the control information is associated with a specific recording velocity and the control information includes write strategy information dependent on a type information indicating whether the control information is associated with CAV mode or CLV mode.
This application claims the benefit of the Korean Application No. 10-2003-0045825 filed on Jul. 7, 2003 and No. 10-2003-0056540 filed on Aug. 14, 2003 and No. 10-2003-0061785 filed on Sep. 4, 2003, which are hereby incorporated by reference.
Technological specifications are now being established for the global standardization of the Blu-ray disc, including standards for a write-once Blu-ray disc (BD-WO). Meanwhile, a rewritable Blu-ray disc, known as 1× speed BD-RE and now under discussion should be compatible with BD-RE discs expected to have higher writing speed, i.e., 2× speed BD-RE and beyond. BD-WO specifications for high writing speed are also in progress. Efficient solutions for coping with the high writing speed of a high-density optical disc are urgently needed, and the specifications established should ensure mutual compatibility.
In one embodiment, the present invention relates to a recording medium having a data structure of a control information recorded on the recording medium or to be recorded/reproduced on/from the recording medium, characterized in that the control information is associated with a specific recording velocity and the control information includes write strategy information dependent on a type information indicating whether the control information is associated with CAV mode or CLV mode.
One embodiment of the present invention relates to a method of recording data on a recording medium, that includes reading a plurality of control information recorded respectively according to each recording velocity within a management area of the recording medium; checking an identification information recorded within each control information, wherein the identification information represents whether the control information is to be used for a CLV (constant linear velocity) mode or a CAV (constant angular velocity) mode; and performing a recording of data based on write strategy parameters included in the control information selected according to the identification information.
One embodiment of the present invention relates to an apparatus for recording data on a recording medium. The apparatus includes an optical pickup for reading control information associated with at least a specific recording velocity from a management area of the recording medium. A controller is used for checking a control information type based on an identification information to identify whether the corresponding control information is used for CLV mode or CAV mode, reading a write strategy included in the corresponding control information as a result of the checking step, and performing the recording of data by using the read write strategy.
The present invention is characterized in that a write strategy (WS) is recorded by interworking with information that identifies a kind of disc information in recording the write strategy (WS) within disc information, one of a plurality of write strategy types is selectively recorded on manufacturing a disc, and a recording/reproducing apparatus (FIG. 12) performs recording/reproducing by referring to the write strategy (WS) recorded within the disc information. Preferentially, the meaning ‘write strategy (WS)’ used in the description of the present invention is explained in detail as follows.
Considering the meaning of ‘write strategy (WS)’, a medium property of a recording layer is generally modified by applying a laser beam to the recording layer within an optical disc via a pickup (‘11’ in FIG. 12) to perform a recording thereof. Hence, various factors must be set such as a strength (write power) of the laser beam, a time of applying the write power thereto, and the like. The above decided various kinds of record-associated information are named ‘write strategy (WS)’ in general and specific contents recorded within a specific ‘write strategy (WS)’ are named ‘write strategy (WS) parameters’.
FIG. 1 and FIG. 2 are structural diagrams of optical discs according to an embodiment of the present invention. Moreover, the recordable disc can be any one of a rewritable optical disc, a write-once optical disc, and the like.
FIG. 1 is a structural diagram of a single-layer disc having one recording layer.
In a data area, provided are a user data area where user's real data is recorded and spare areas ISA and OSA to replace a generated defect area. Specifically, TDMA (temporary defect management area) for recording information of defect and general managements is provided in a write-once optical disc as BD-WO. In the case of the re-writable BD (BD-RE), TDMA is unnecessary and is left as a reserved area.
The present invention intends to provide a method of efficiently recording disc information (DI) as control information required for record playback of a disc in the prerecorded or recordable area. It is apparent that a recording method in the prerecorded area is differently applied to each kind of discs. In the case of BD-RE/WO, the PIC area as the prerecorded area is recorded by biphased high frequency modulated signals. The high frequency modulated signals in the corresponding area are played back according to a specific playback method and information is acquired from the playback.
In BD-RE/WO, ‘one cluster’ represents a minimum record unit. Five hundred forty-four clusters construct one fragment as one upper record unit. Five fragments gather together to form the PIC area. Disc information is recorded in a front head cluster of a first fragment IFO. The disc information is plurally recorded per recording layer and writing speed permitted by the corresponding optical disc. One disc information includes one hundred twelve bytes. Specifically, disc information constructed with 112-bytes is called disc information (DI) frame. Moreover, the same contents of the disc information are repeatedly recorded in each front head cluster of the rest of the fragments to address the potential loss of the disc information.
Information representing the corresponding recording layer, information representing writing speed, and write strategy information corresponding to the writing speed are recorded within each disc information. Hence, such information is utilized in the recording or reproducing of the corresponding optical disc to provide optimal write power per recording layer and per writing speed.
FIG. 4 is a diagram for recording disc information in an optical disc according to one embodiment of the present invention, in which a disc information structure is schematically shown.
Referring to FIG. 4, a plurality of disc information are recorded within a disc. A record sequence of each disc information is decided by a sequence number, and the record sequence is recorded by 1-byte. For instance, the corresponding information is recorded in the 5th byte within the disc information, which is named ‘DI frame sequence number in DI block’ field and is briefly indicated by ‘00h, 01h, 02h, 03h . . . ’. Namely, if the information of the 5th byte is ‘00h’, it means 1st disc information. And, if the information of the 5th byte is ‘07h’, it means 8th disc information. Moreover, the meaning of ‘DI frame sequence number in DI block’ of the 5th byte can be defined in a following manner. First of all, if the information of the 5th byte is ‘00h’, ‘00h’ means 1st disc information as well as disc information of 1× speed of a first recording layer Layer0. ‘01h’ means 2nd disc information as well as disc information of 2× speed of the first recording layer Layer0. ‘02h’ means 3rd disc information as well as disc information of 4× speed of the first recording layer Layer0. And, ‘03h’ means 4th disc information as well as disc information of 8× speed of the first recording layer Layer0. It is a matter of course that the recording layer information and the writing speed information can be separately recorded in a reserved area within disc information.
Identification information to identify a type or kind of the disc information is recorded in a specific area of Nth byte, which is named ‘DI Type’ field, within the disc information. Moreover, a write strategy (WS) interoperating with the type of the corresponding disc information is recorded in another specific area, e.g., area named ‘Write Strategy parameters’ field as Lth˜111th bytes, within the disc information.
It is identified whether the corresponding disc information is in ‘CLV’ mode or ‘CAV’ mode via ‘DI Type’ field, and the write strategy (WS) is recorded in a manner fitting the identified mode. For instance, if it is the CLV mode, a WS for one recording velocity is recorded only. If it is CAV mode, it is necessary to record a WS for one type recording velocity group (e.g., three kinds of linear velocities such as 1×, 1.7×, and 2.4×).
FIG. 5 shows an exemplary method of recording disc information with recording identification information for identifying a disc information type in the Nth byte within the disc information. Like FIG. 4, one recording layer Layer0 is shown for convenience of explanation. The method can be applied in the same manner even if more recording layers exist.
The disc information of the present invention, as mentioned in the foregoing description, is information that a disc manufacturer records in a prerecorded area within the disc that reflects the characteristics of a corresponding disc. A write strategy (WS) may be recorded on the disc so that a recording/reproducing apparatus (FIG. 12) can utilize that information in the practical application of the recording/reproducing processes. Hence, in recording disc information, a disc manufacturer preferentially decides an applicable writing speed per recording layer and then records identification information indicating whether the decided writing speed corresponds to the CLV or CAV method in the Nth byte. Hence, the write strategy (WS) interworking with the identification information is identified according to a CLV or CAV mode to be recorded in Lth˜111th bytes.
For example, disc information for 1× speed of 1st recording layer is recorded in ‘00h’ as a disc information sequence. A disc information type means a CAV mode. A write strategy (WS) interworks with it so that a CAV WS is selected to be recorded. Disc information for 2× speed of 1st recording layer is recorded in ‘01h’. A disc information type means a CLV mode. A write strategy (WS) interworks with it so that a CLV WS is selected to be recorded. Disc information for 4× speed of 1st recording layer is recorded in ‘02h’. A disc information type means a CLV mode. A write strategy (WS) interworks with it so that a CLV WS is selected to be recorded. Disc information for 8× speed of 1st recording layer is recorded in ‘03h’. A disc information type means a CAV mode. A write strategy (WS) interworks with it so that a CAV WS is selected to be recorded. In this case, the CLV or CAV WS means one write strategy (WS) selected by a disc manufacturer. In the case of CLV, the write strategy will be applied to one kind of writing speed. In case of CAV, the write strategy will be applied to a plurality of writing speeds for one type writing speed or recording velocity group.
FIG. 6 is a diagram of recording control information according to another embodiment of the present invention. Compared to the embodiment in FIG. 4, FIG. 6 shows that specific identification for CAV mode is subdivided as applied to ‘DI Type’ field written in Nth byte within disc information.
FIG. 7 is a diagram of recording control information according to a further embodiment of the present invention, in which information for identifying a type of disc information is recorded within disc information (similar to the embodiment in FIG. 4) together with another information to identify a type of write strategy (WS) used.
Referring to FIG. 7, the information to identify a write strategy (WS) type is to identify which one of a plurality of specified write strategies (WS) was selected to be used by a disc manufacturer, whereas the information for identifying a disc information type enables to identify whether corresponding disc information is in CLV mode or CAV mode. For example, as mentioned in the foregoing description, various write strategy types, which can exist such as (n−1) WS, n/2 WS, etc., are defined as 1st WS WS-1, 2nd WS WS-2, . . . and Kth WS WS-K. And, the information identifying the write strategy type (named ‘WS Type’) selected by a disc manufacturer is recorded within disc information.
This is explained by being compared to the embodiment in FIG. 4 as follows. First of all, a ‘Write Strategy (WS) Type’ field is added to Pth byte of the embodiment in FIG. 4 so that Lth˜111th write strategy (WS) is recorded by interworking with a disc information type in the Nth byte and a write strategy (WS) type in the Pth byte. Namely, it can be defined as follows. If ‘0000 0000b’ is written in the Pth byte, it means 1st WS WS-1. If ‘0000 0010b’ is written in the Pth byte, it means 2nd WS WS-2. And, if ‘XXXX XXXXb’ is written in the Pth byte, it means Kth WS WS-K.
FIG. 8 is a diagram of recording a write strategy within control information according to a further embodiment of the embodiment of FIG. 7, and FIG. 9 is a diagram of another example of recording a write strategy within control information according to a further embodiment of the embodiment shown in FIG. 7.
Referring to FIG. 8, the Nth byte of disc information indicates a disc information type, the Pth byte of disc information indicates a write strategy (WS) type, and parameters associated with one write strategy (WS) decided by interworking with the Nth and Pth bytes are recorded in Lth˜11th bytes.
Referring to FIG. 11, ‘0000 0000b’ is written in ‘DI Type’ field of Nth byte to mean CLV mode. ‘0000 0001b’ is written in ‘Write Strategy (WS) Type’ field of Pth byte to mean 1st WS WS-1. 5th byte is ‘00h’ to mean 1× speed disc information of 1st recording layer. And, a specific write strategy (WS) interworking with the Nth and Pth bytes is written in Lth-111th bytes within a disc.
If the intent is to perform a recording on a specific area within the optical disc, the control unit 20 renders such an intent into a writing command and then delivers it to the recorder/reproducer 10 together with data for writing location information to be recorded. After receiving the writing command, the microcomputer 16 decides the corresponding writing speed applied to an area within the optical disc from the management information (specifically via disc information) stored in the memory 15 and then performs the writing command by finding optimal write power by referring to a write strategy (WS) corresponding to the decided writing speed.
1. A computer-readable recording medium having a data structure of a control information recorded on the recording medium, wherein the control information is required for recording data and the control information is associated with a specific recording velocity and a specific write strategy type usable at the specific recording velocity and the control information includes write strategy information dependent on a type information for indicating whether the control information is associated with CLV (constant linear velocity) mode or CAV (constant angular velocity) mode,
wherein when the type information indicates that the control information is usable for the CAV mode, the control information includes information on at least three linear recording velocities and the write strategy information associated with the at least three linear recording velocities to be usable for performing the recording of data based on the CAV mode.
2. The computer-readable recording medium of claim 1, wherein the write strategy information includes write strategy parameters associated with CLV (constant linear velocity) mode or CAV (constant angular velocity) mode.
3. The computer-readable recording medium of claim 2, wherein the control information further includes an identification information for identifying recording velocities associated with the write strategy parameters if the type information identifies the control information for CAV (constant angular velocity) mode.
4. The computer-readable recording medium of claim 3, wherein respective write strategy parameters sets associated with the respective recording velocities are included in the control information.
5. The computer-readable recording medium of claim 2, wherein the write strategy parameters are associated with at least one recording velocity if the type information identifies the control information for CLV (constant linear velocity) mode.
6. The computer-readable recording medium of claim 1, wherein the control information further includes a write strategy type information for identifying a type of write strategy.
7. The computer-readable recording medium of claim 6, wherein the type of write strategy is one of at least two types of write strategies, wherein first write strategy type is n/2 and second write strategy type is n−1, where n is a length of mark, and each write strategy type represents a number of write pulses to form a corresponding mark.
8. The computer-readable recording medium of claim 7, wherein one of the specified types of the write strategy is preferentially used for recording/reproducing data on/from the recording medium.
9. The computer-readable recording medium of claim 6, wherein the write strategy parameters for a predetermined specific recording velocity of the control information are recorded based on the write strategy type, the write strategy type being determined by considering preference to recording/reproducing of the data.
10. The computer-readable recording medium of claim 6, wherein the write strategy parameters associated with the type of control information and the write strategy type information are included in the control information.
reading control information from a management area of the recording medium, the control information being associated with a specific recording velocity and a specific write strategy type usable at the specific recording velocity;
checking type information within the control information, wherein the type information represents whether the corresponding control information is usable for a CLV (constant linear velocity) mode or a CAV (constant angular velocity) mode, and wherein when the type information indicates that the control information is usable for the CAV mode, the control information includes information on at least three linear recording velocities and write strategy information associated with the at least three linear recording velocities to be usable for performing the recording of data based on the CAV mode; and
performing a recording of data in the CLV or CAV mode by using the write strategy information as a result of the checking step.
identifying a type of control information recorded on the recording medium, based on a type information within the control information, wherein the control information is associated with at least one of a plurality of specific recording velocities to provide a reference information for recording data and associated with a specific write strategy type usable at a corresponding specific recording velocity, and the type information indicates whether the control information is usable for CLV (constant linear velocity) mode or CAV (constant angular velocity) mode, and wherein when the type information indicates that the control information is usable for the CAV mode, the control information includes information on at least three linear recording velocities and write strategy information associated with the at least three linear recording velocities to be usable for performing the recording of data based on the CAV mode; and
recording data by using write strategy parameters included in the control information to be used for CLV (constant linear velocity) mode or CAV (constant angular velocity) mode as a result of identifying step.
13. The method of claim 12, wherein the identifying step further identifies write strategy type information for indicating a specific write strategy type, wherein the write strategy parameters are associated with the type information and the write strategy type information.
14. An apparatus for recording data on a recording medium, comprising:
an optical pickup configured to read control information associated with at least a specific recording velocity and a specific write strategy type usable at the specific recording velocity from a management area of the recording medium; and
a controller configured to check type information within the control information to identify whether the corresponding control information is usable for CLV (constant linear velocity) mode or CAV (constant angular velocity) mode, wherein when the type information indicates that the control information is usable for the CAV mode, the control information includes information on at least three linear recording velocities and write strategy information associated with the at least three linear recording velocities to be usable for performing the recording of data based on the CAV mode, and the controller configured to control the recording of data in the CLV or CAV mode by using the write strategy information as a result of the checking.
15. The apparatus of claim 14, wherein the controller is configured to control the recording of data at a corresponding recording velocity.
16. The apparatus of claim 14, wherein the controller is further configured to read write strategy parameters associated with the write strategy type from the corresponding control information, and control the recording of data by using the write strategy parameters.
17. The apparatus of claim 14, wherein the controller is further configured to control a servo operation based on the control information for CLV (constant linear velocity) mode or CAV (constant angular velocity) mode.
18. The apparatus of claim 14, wherein the write strategy information includes parameters associated with a write multi-pulse duration, a first write pulse duration and a first write pulse start time, wherein the controller is configured to control the recording of data by using the parameters.
19. The apparatus of claim 16, wherein the write strategy information further includes parameters associated with an erase multi-pulse duration and a first erase pulse start time, wherein the controller is configured to control the recording of data by using the parameters additionally.
20. The computer-readable recording medium of claim 1, wherein the write strategy information includes parameters associated with a write multi-pulse duration, a first write pulse duration and a first write pulse start time.
21. The computer-readable recording medium of claim 20, wherein the write strategy information further includes parameters associated with an erase multi-pulse duration and a first erase pulse start time.
22. The method of claim 11, wherein the write strategy parameters includes parameters associated with a write multi-pulse duration, a first write pulse duration and a first write pulse start time, wherein the performing step performs the recording of data by using the parameters.
23. The method of claim 22, wherein the write strategy parameters further includes parameters associated with an erase multi-pulse duration and a first erase pulse start time, wherein the performing step performs the recording of data by using the parameters additionally.
24. The method of claim 12, wherein the write strategy parameters includes a write multi-pulse duration, a first write pulse duration and a first write pulse start time, wherein the recording step records data by using the parameters.
25. The method of claim 24, wherein the write strategy parameters further includes an erase multi-pulse duration and a first erase pulse start time, wherein the recording step records data by using the parameters additionally.
26. The apparatus of claim 14, wherein the specific write strategy type is one of at least two types of write strategies, first write strategy type is n/2 and second write strategy type is n−1, where n is a length of mark, and each write strategy type represents a number of write pulses to form a corresponding mark, and
wherein the controller is configured to control the optical pickup unit to record data by using parameters dependent on the specific write strategy type.
a data processor configured to process data to be recorded and deliver the processed data to the optical pickup; and
a memory configured to store at least the control information.
28. The apparatus of claim 14, wherein the controller is configured to control the optical pickup unit to record data by using the write strategy information included in the corresponding control information, according to CLV (constant linear velocity) mode if the control information is usable for CLV (constant linear velocity) mode, but not CAV (constant angular velocity) mode, while control the optical pickup unit to record data by using the write strategy information included in the corresponding control information, according CAV (constant angular velocity) if the control information is usable for CAV (constant angular velocity) mode, but not CLV (constant linear velocity) mode.
29. An apparatus for recording data on an optical recording medium, comprising:
an optical pickup configured to record data on the optical recording medium;
a memory configured to store at least one control information associated with at least a specific recording velocity and a specific write strategy type usable at the specific recording velocity; and
a control unit configured to identify a type of the control information stored in the storage, based on an type information to identify whether the corresponding control information is usable for CLV (constant linear velocity) mode or CAV (constant angular velocity) mode, wherein when the type information indicates that the control information is usable for the CAV mode, the control information includes information on at least three linear recording velocities and write strategy information associated with the at least three linear recording velocities to be usable for performing the recording of data based on the CAV mode, and the control unit configured to control the optical pickup to record data by using the write strategy information.
30. The apparatus of claim 29, wherein the control unit is further configured to control a servo unit to record data at a corresponding recording velocity.
31. The apparatus of claim 30, wherein the control unit is further configured to control the servo unit based on the control information for CLV (constant linear velocity) mode or CAV (constant angular velocity) mode.
32. The apparatus of claim 31, wherein the control unit is configured to control the servo unit according to CLV (constant linear velocity) mode if the control information is usable for CLV (constant linear velocity) mode, but not CAV (constant angular velocity) mode, while control the servo unit according to CAV (constant angular velocity) if the control information is usable for CAV (constant angular velocity) mode, but not CLV (constant linear velocity) mode.
a data processor configured to process data to be recorded and deliver the processed data to the optical pickup.
34. The apparatus of claim 29, wherein the control unit is further configured to identify the control information based on a write strategy type identified by a write strategy type information and control the optical pickup to record data by using the write strategy associated with the write strategy type from the corresponding control information.
35. The apparatus of claim 29, wherein the write strategy information includes parameters associated with a write multi-pulse duration, a first write pulse duration and a first write pulse start time, wherein the control unit is configured to control the optical pickup to record data by using the parameters.
36. The apparatus of claim 35, wherein the write strategy information further includes parameters associated with an erase multi-pulse duration and a first erase pulse start time, wherein the control unit is configured to control the optical pickup to record data by using the parameters additionally.
37. The apparatus of claim 28, wherein the specific write strategy type is one of at least two types of write strategies, first write strategy type is n/2 and second write strategy type is n−1, where n is a length of mark, and each write strategy type represents a number of write pulses to form a corresponding mark, and
wherein the control unit is configured to control the optical pickup to record data by using parameters dependent on the specific write strategy type.
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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SUH, SANG WOON;KIM, JIN YONG;REEL/FRAME:015553/0720