Source: http://www.google.com/patents/US7701819?dq=U.S.+Patent+No.+4,528,643
Timestamp: 2016-07-28 04:45:02
Document Index: 476207014

Matched Legal Cases: ['Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 07017410', 'Application No. 06124032', 'Application No. 07007648', 'Application No. 05771159', 'Application No. 2006', 'Application No. 2006', 'Application No. 2006107926', 'Application No. 2004122401', 'Application No. 2007135326', 'Application No. 2005111867', 'application No. 200480000820', 'application No. 200710162346', 'application No. 200710162347', 'application No. 2006', 'application No. 2007', 'application No. 10', 'application no. 093124591', 'application No. 95121964', 'Application No. 2006', 'Application No. 200710127832', 'Application No. 2006', 'Application No. 438', 'Application No. 2004122413', 'Application No. 2006', 'Application No. 04', 'Application No. 07016686', 'Application No. 200610084094', 'Application No. 2006', 'Application No. 2007', 'Application No. 07007644', 'Application No. 07120273']

Patent US7701819 - Recording medium, method of configuring control information thereof ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA data structure of a control information for use with a computer-readable recording medium having multiple recording layers. The control information includes first information unit for a first recording layer and second information unit for a second recording layer. The first information unit includes...http://www.google.com/patents/US7701819?utm_source=gb-gplus-sharePatent US7701819 - Recording medium, method of configuring control information thereof, recording and reproducing method using the same, and apparatus thereofAdvanced Patent SearchPublication numberUS7701819 B2Publication typeGrantApplication numberUS 11/907,661Publication dateApr 20, 2010Filing dateOct 16, 2007Priority dateAug 14, 2003Fee statusPaidAlso published asCA2535264A1, CA2535264C, CN1853228A, CN1881428A, CN1881428B, CN100437787C, CN101202056A, CN101202056B, CN101202057A, CN101202057B, CN101202058A, CN101202058B, DE602004024079D1, DE602004026224D1, DE602004030496D1, EP1656668A2, EP1656668B1, EP1760702A2, EP1760702A3, EP1760702B1, EP1921619A2, EP1921619A3, EP1921619B1, EP1923870A2, EP1923870A3, EP1923871A2, EP1923871A3, US7342857, US7630280, US7684292, US7701817, US20050036425, US20060233059, US20080043588, US20080043590, US20080112283, WO2005017882A2, WO2005017882A3Publication number11907661, 907661, US 7701819 B2, US 7701819B2, US-B2-7701819, US7701819 B2, US7701819B2InventorsSang Woon Suh, Jin Yong KimOriginal AssigneeLg Electronics, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (124), Non-Patent Citations (45), Classifications (14), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetRecording medium, method of configuring control information thereof, recording and reproducing method using the same, and apparatus thereof
US 7701819 B2Abstract
A data structure of a control information for use with a computer-readable recording medium having multiple recording layers. The control information includes first information unit for a first recording layer and second information unit for a second recording layer. The first information unit includes write strategy parameters for a first write strategy type to be used for the first recording layer, and the second information unit includes write strategy parameters for a second write strategy type to be used for the second recording layer. The second write strategy type being the same or different from the first write strategy type.
1. A data structure of a control information for use with a recording medium having multi-recording layers, the control information including first information unit for a first recording layer and second information unit for a second recording layer,
wherein the first information unit includes write strategy parameters for first write strategy type to be used for the first recording layer, and the second information unit includes write strategy parameters for second write strategy type to be used for the second recording layer, the second write strategy type being different from the first write strategy type, and
wherein each of the first and second write strategy types is an n−1 write strategy type or an n/2 write strategy type, where n is a length of mark and each of the n−1 and n/2 represents the number of write pulses to form the mark.
2. The data structure of claim 1, wherein the data structure is to record on the recording medium, to record a main data on the recording medium based on the control information recorded as the data structure in the recording medium, or recorded on the recording medium.
3. The data structure of claim 2, wherein each information unit includes an identification information identifying the first write strategy type and the second write strategy type, respectively.
4. The data structure of claim 3, wherein each identification information identifies one of an n−1 write strategy type and an n/2 write strategy type, where n is a length of mark and each type represents a number of write pulses to form a corresponding mark.
5. The data structure of claim 2, wherein the first write strategy type for the first recording layer and the second write strategy type for the first recording layer are same, wherein the first and second write strategy types are an n−1 write strategy type or an n/2 write strategy type.
6. The data structure of claim 2, wherein the first write strategy type for the first recording layer and the second write strategy type for the first recording layer are different, wherein the first write strategy type is an n−1 write strategy type or an n/2 write strategy type and the second write strategy type is an n−1 write strategy type or an n/2 write strategy type.
7. The data structure of claim 6, wherein the first write strategy type is an n−1 write strategy type and the second write strategy type is an n/2 write strategy type.
8. The data structure of claim 6, wherein the first write strategy type is an n/2 write strategy type and the second write strategy type is an n−1 write strategy type.
9. The data structure of claim 2, wherein the control information further includes an alternative information unit for alternative write strategy type applicable to each recording layer.
10. The data structure of claim 9, wherein the first write strategy type for the first recording layer is an n−1 write strategy type and alternative write strategy type is an n/2 write strategy type while the second write strategy type for the second recording layer is an n/2 write strategy type and alternative write strategy type is an n−1 write strategy type, where n is a length of mark and each type represents a number of write pulse to form a corresponding mark.
11. The data structure of claim 2, wherein each information unit includes a recording layer number information to identify a corresponding recording layer.
12. The data structure of claim 2, wherein each information unit includes type information identifying an applicable write strategy type.
13. A method of recording data, comprising:
reading a control information, the control information including first information unit for a writing speed and first recording layer and second information unit for the same writing speed and second recording layer, the first information unit including write strategy parameters for first write strategy type to be used for the writing speed and first recording layer, and the second information unit including write strategy parameters for second write strategy type to be used for the same writing speed and second recording layer, the second write strategy type being different from the first write strategy type, wherein each of the first and second write strategy types is an n−1 write strategy type or an n/2 write strategy type, where n is a length of mark and each of the n−1 and n/2 represents the number of write pulses to form the mark; and
recording a main data at the writing speed using the corresponding write strategy parameters to the corresponding recording layer.
identifying at least one of the first and second information units based on an identification information,
wherein the recording step records the main data on a specific recording layer based on the identified information unit.
15. The method of claim 13, wherein the second write strategy type is same as the first write strategy type, wherein the first and second write strategy types are an n−1 write strategy type or an n/2 write strategy type.
16. The method of claim 13, wherein the second write strategy type is different from the first write strategy type, wherein the first write strategy type is an n−1 write strategy type and the second write strategy type is an n/2 write strategy type, further comprising:
identifying the corresponding write strategy type to record the main data to the corresponding recording layer.
17. The method of claim 13, wherein the second write strategy type is different from the first write strategy type, wherein the first write strategy type is an n/2 write strategy type and the second write strategy type is an n−1 write strategy type, further comprising:
18. The method of claim 13, wherein the control information further includes an alternative information unit for alternative write strategy type applicable to each recording layer,
wherein the recording step records the main data using one of first write strategy type and the alternative write strategy type for the first recording layer and using one of second write strategy type and the alternative write strategy type for the second recording layer.
19. The method of claim 18, wherein the first write strategy type for first recording layer is an n−1 write strategy type and alternative write strategy type is an n/2 write strategy type while the second write strategy type for second recording layer is an n/2 write strategy type and alternative write strategy type is an n−1 write strategy type, where n is a length of mark and each type represents a number of write pulse to form a corresponding mark, further comprising:
determining a corresponding write strategy type to record the main data on the corresponding recording layer.
20. The method of claim 13, wherein each information unit includes type information identifying an applicable write strategy type, further comprising:
identifying an applicable write strategy type,
wherein the recording step records the main data according to the identified applicable write strategy type.
specifying a recording layer to record the main data; and
determining a write strategy type based on the determination,
wherein the recording step records the main data using write strategy parameters for the determined write strategy type on the specified recording layer.
22. A method of recording data, comprising:
reading a control information, the control information including at least first information unit for a first recording layer and second information unit for a second recording layer, the first information unit including write strategy parameters for first write strategy type to be used for the first recording layer and the second information unit including write strategy parameters for second write strategy type to be used for the second recording layer, wherein the first write strategy type is one of an n−1 write strategy type and an n/2 write strategy type and the second write strategy type is one of an n−1 write strategy type and an n/2 write strategy type, the first write strategy type being different from the second write strategy type, where n is a length of mark and each type represents a number of write pulse to form a corresponding mark; and
recording a main data using the write strategy parameters for the first or second write strategy type at the corresponding recording layer.
23. The method of claim 22, wherein the recording step records the main data using the n−1 write strategy type for the first recording layer while using the n/2 write strategy type for the second recording layer.
24. The method of claim 23, wherein the recording step records the main data using the number of pulses one less than the mark length to form a corresponding mark for the first recording layer, while using the number of pulses corresponding to half the mark length to form a corresponding mark for the second recording layer, the integer number of pulses from the result being only available.
25. The method of claim 23, wherein each write strategy type is applied to the corresponding recording layer with same recording speed.
specifying a recording layer to record the main data,
wherein the recording step records the main data using write strategy parameters for the write strategy type for the specified recording layer.
27. The method of claim 26, wherein the recording step records the main data using the n−1 write strategy type for the first recording layer while using the n/2 write strategy type for the second recording layer.
28. The method of claim 26, wherein the recording step records the main data using the n/2 write strategy type for the first recording layer while using the n−1 write strategy type for the second recording layer.
29. An apparatus for recording data, comprising:
a controller configured to generate a recording command for a specific recording layer from a multi-layer recording medium and control a recording operation; and
a recorder/reproducer configured to perform a recording of data, based on the recording command from the controller, by reading a control information, the control information including first information unit for a first recording layer and second information unit for a second recording layer, the first information unit including write strategy parameters for first write strategy type to be used for the first recording layer and second information unit including write strategy parameters for second write strategy type to be used for the second recording layer, wherein the first write strategy type is one of an n−1 write strategy type and an n/2 write strategy type and the second write strategy type is one of an n−1 write strategy type and an n/2 write strategy type, the first write strategy type being different from the second write strategy type, where n is a length of mark and each type represents a number of write pulse to form a corresponding mark,
wherein the recorder/reproducer is configured to perform the recording of data on the corresponding recording layer using the corresponding write strategy type, according to a control of the controller.
30. The apparatus of claim 29, wherein the controller is configured to identify at least one of first and second information units based on an identification information required for identifying a specific write strategy type, and control the recorder/reproducer to record the main data on the specific recording layer using write strategy parameters included in the identified information unit.
31. The apparatus of claim 29, wherein the controller is configured to specify a recording layer to record the main data, and determine a write strategy type based on the determination,
wherein the recorder/reproducer is configured to record the main data using write strategy parameters for the determined write strategy type at the specified recording layer.
wherein the controller is configured to identify the corresponding information unit based on an identification information identifying the at least one of the first write strategy type and the second write strategy type from the control information stored in the memory.
33. The apparatus of claim 29, wherein the first write strategy type is same as the second write strategy type, wherein the controller is configured to control the recorder/reproducer to record the main data using n−1 or n/2 write strategy types to the first recording layer or the second recording layer.
34. The apparatus of claim 29, wherein the first write strategy type is different from the second write strategy type, wherein the controller is configured to control the recorder/reproducer to record the main data using n−1 write strategy type to the first recording layer while records the main data using n/2 write strategy type to the second recording layer.
35. The apparatus of claim 29, wherein the first write strategy type is different from the second write strategy type, wherein the controller is configured to control the recorder/reproducer to record the main data using n/2 write strategy type to the first recording layer while records the main data using n−1 write strategy type to the second recording layer.
36. The apparatus of claim 29, wherein each information unit includes type information identifying an applicable write strategy type, and the controller is configured to control the recorder/reproducer to record the main data to the corresponding recording layer based on an applicable write strategy identified by type information.
37. An apparatus for recording data, comprising:
a writing/reading unit configured to read at least one control information and to record a main data on a specific recording layer from a multi-layer recording medium, the control information including first information unit for a writing speed and a first recording layer and, second information unit for the same writing speed and a second recording layer, the first information unit including write strategy parameters for first write strategy type to be used for the writing speed and the first recording layer, and second information unit including write strategy parameters for second write strategy type to be used for the same writing speed and the second recording layer, the second write strategy type being different from the first write strategy type, each write strategy type being one an n−1 write strategy type and an n/2 write strategy type, where n is a length of mark and each type represents a number of write pulse to form a corresponding mark; and
a controller configured to control the writing/reading unit to record the main data on each recording layer based on at least one of the first and second write strategy types,
wherein the controller is configured to determine a specific write strategy type to record the main data on the corresponding recording layer and apply the determined write strategy type applicable to the corresponding recording layer.
38. The apparatus of claim 37, wherein the controller is configured to control the writing/reading unit such that the n−1 write strategy type is applied to the first recording layer and the n/2 write strategy type is applied to the second recording layer.
39. The apparatus of claim 38, wherein the controller is configured to control the writing/reading unit to record the main data using the number of pulses one less than the mark length to form a corresponding mark for the first recording layer, while using the number of pulses corresponding to half the mark length to form a corresponding mark for the second recording layer, the integer number of pulses from the result being only available.
40. The apparatus of claim 37, wherein the controller is configured to control the writing/reading unit such that the n/2 write strategy type is applied to the first recording layer and the n−1 write strategy type is applied to the second recording layer.
41. The apparatus of claim 40, wherein the controller is configured to control the writing/reading unit to record the main data using the number of pulses corresponding to half the mark length to form a corresponding mark for the second recording layer, the integer number of pulses from the result being only available, while using the number of pulses one less than the mark length to form a corresponding mark for the first recording layer.
42. The apparatus of claim 37, wherein the controller is configured to specify a recording layer to record the main data, and determine a write strategy type based on the determination,
wherein the writing/reading unit is configured to record the main data using write strategy parameters for the determined write strategy type at the specified recording layer, according to the control of the controller.
The present invention is a continuation application of U.S. Ser. No. 10/918,397, filed Aug. 16, 2004, now U.S. Pat. No. 7,342,857 the entire contents of which are incorporated by reference herein.
The present invention claims the benefit of Korean Application No. 10-2003-0056540 filed on Aug. 14, 2003, Korean Application No. 10-2003-0061785 filed on Sep. 4, 2003, Korean Application No. 10-2003-0063591 filed on Sep. 15, 2003, and Korean Application No. 10-2003-0065628 filed on Sep. 22, 2003, the entire contents of which are hereby incorporated by reference.
A data structure of a control information for use with a recording medium having multiple recording layers. The control information includes a first information unit for a first recording layer and a second information unit for a second recording layer. The first information unit includes write strategy parameters for the first write strategy type to be used for the first recording layer, and the second information unit includes write strategy parameters for the second write strategy type to be used for the second recording layer. The second write strategy type being the same or different from the first write strategy type.
A method of recording data that includes reading a control information where the control information has a first information unit for a writing speed and a first recording layer and a second information unit for the same writing speed and a second recording layer. The first information unit includes write strategy parameters for the first write strategy type to be used for the writing speed and first recording layer, and second information unit including write strategy parameters for the second write strategy type to be used for the same writing speed and second recording layer. The second write strategy type being the same or different from the first write strategy type. Thereafter, the method calls for recording a main data at the writing speed using the corresponding write strategy parameters to the corresponding recording layer.
A method of recording data that includes reading a control information where the control information has at least a first information unit for a first recording layer and a second information unit for a second recording layer. The first information unit including write strategy parameters for first write strategy type to be used for the first recording layer and the second information unit including write strategy parameters for second write strategy type to be used for the second recording layer. The first write strategy type is one of an n−1 write strategy type and an n/2 write strategy type and the second write strategy type is one of an n−1 write strategy type and an n/2 write strategy type. The first write strategy type being different from the second write strategy type. The variable n is a length of mark and each type represents a number of write pulse to form a corresponding mark. Thereafter, the method calls for recording a main data using write strategy parameters for first or second write strategy types at the corresponding recording layer.
An apparatus for recording data that includes a controller for generating a recording command for a specific recording layer from a multiple layer recording medium and controlling a recording operation. A recorder/reproducer is configured to perform a recording of data, based on the recording command from the controller, by reading a control information. The control information includes a first information unit for a first recording layer and a second information unit for a second recording layer. The first information unit includes write strategy parameters for a first write strategy type to be used for the first recording layer and a second information unit including write strategy parameters for a second write strategy type to be used for the second recording layer. The first write strategy type is one of an n−1 write strategy type and an n/2 write strategy type and the second write strategy type is one of an n−1 write strategy type and an n/2 write strategy type. The first write strategy type being the same or different from the second write strategy type. The variable n is a length of mark and each type represents a number of write pulses to form a corresponding mark. The recorder/reproducer performs the recording of data on the corresponding recording layer using the corresponding write strategy type, according to a control of the controller.
An apparatus for recording data that includes a writing/reading unit to read at least one control information and to record a main data on a specific recording layer from a multiple layer recording medium. The control information includes a first information unit for a writing speed and a first recording layer and a second information unit for the same writing speed and a second recording layer. The first information unit includes write strategy parameters for a first write strategy type to be used for the writing speed and the first recording layer, and the second information unit including write strategy parameters for a second write strategy type to be used for the same writing speed and the second recording layer. The second write strategy type being different from the first write strategy type. Each write strategy type being one an n−1 write strategy type and an n/2 write strategy type. The variable n is a length of mark and each type represents a number of write pulse to form a corresponding mark. A controller configured to control the writing/reading unit to record the main data on each recording layer based on first and second write strategy type, wherein the controller determines a specific write strategy type to record the main data on the corresponding recording layer and applies the determined write strategy type applicable to the corresponding recording layer.
FIGS. 5A-5C are diagrams of a sample data structure of disc control information recorded according to a second embodiment of the present invention;
Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. For convenience of explanation, a Blu-ray disc (BD) is taken as an example of an optical disc according to the present invention. Yet, it is apparent that the concept of the present invention, which is characterized in an optical disc having its disc control information recorded thereon, is applicable to DVD-RAM/−RW/+RW/−R/+R and the like for example in the same manner.
For instance, the disc control information is called ‘disc information’ in BD or ‘physical format information’ in DVD-RAM/−RW/+RW/−R/+R. Hence, it is apparent that the technical background of the present invention is identically applicable to ‘physical format information’ in DVD-RAM/−RW/+RW/−R/+R. For convenience of explanation, ‘disc information (hereinafter abbreviated DI)’ corresponding to a case of Blu-ray disc (BD) is taken as an example.
Referring to FIG. 4A, a plurality of disc informations 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 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 . . . ’.
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. 10) to perform a recording thereof. Hence, it should be decided a strength (write power) of the laser beam, write pulse, a time of applying the write power thereto, and the like. The above-decided various kinds of write strategies are named ‘Write Strategy (WS)’ in general and specific contents recorded within a specific ‘Write Strategy (WS)’ are named ‘Write Strategy (WS) parameters’.
Write strategy (WS) information used in the present invention means the entire information associated with write strategy (WS). And, WS parameters means items and specific numeric values configuring WS and is a sort of WS information. Hence, the WS information has an inclusive concept of including the above-described ‘WS Type’, ‘WS flag’ that will be explained later, and the like as well as the WS parameters.
First of all, there is a system having a number of recording pulse smaller by 1 than a recording mark size (n) formed on a recording layer medium, which may be called ‘(n−1) WS’. For example, if a mark has a length 7T, it requires 6 pluses to form the 7T according to the (n−1)WS. In that case, a time of each write pulse or a level of write power is defined by the write strategy parameters recorded in the corresponding disc information. Secondly, there is a system having a number of recording pulse having a size amounting to a half of the recording mark size (n), which may be called ‘n/2 WS’. For example, if a mark has a length 7T, it requires 3 pluses to form the 7T according to the (n−1)WS. That is, a decimal fraction of the result is discarded and the integer numbers of pluses are only available. In that case, a time of each write pulse or a level of write power is defined by the write strategy parameters recorded in the corresponding disc information. The respective write strategy parameters for each write strategy type may have different values each other. Besides, new write strategies (WS) keep being developed. Regarding the different kinds of write strategy (WS), when there exist the various systems of the write strategy (WS) exist as parameters applied to the write strategies (WS) differ from each other, a disc manufacturer tests the write power according to the write strategy (WS) and then records a result of the test in ‘WS parameters’ field of the Lth˜111th bytes within the disc information and WS type information in Nth byte.
In the present invention, 1st WS (WS-1) is defined by the above-explained ‘(n−1) WS’ and 2nd WS (WS-1) is defined by ‘(n/2) WS’.
Moreover, if the ‘WS Type’ field is set to ‘0000 0000b’, it can be defined to mean that a specific WS type fails to exist as well as WS parameters within disc information. Namely, the ‘WS Type’ field of the Nth byte can be utilized as information indicating that there exists no WS parameters as well as information designating the WS type.
FIG. 4C shows a case of enabling to optionally different record write strategies (WS) in the entire recording layers and at the entire recording velocities. For instance, disc information of 1� speed of a first recording layer Layer0 is recorded in ‘00h’ as a disc information sequence and 1st WS (WS-1) is selected to be recorded as a write strategy (WS). Disc information of 1� speed of a second recording layer Layer1 is recorded in ‘01h’ and 2nd WS (WS-2) is selected to be recorded as a write strategy (WS). Disc information of 2� speed of the first recording layer Layer0 is recorded in ‘02h’ and I″ WS (WS-1) is selected to be recorded as a write strategy (WS). And, disc information of 2� speed of the second recording layer Layer1 is recorded in ‘03h’ and Nth WS (WS-N) is selected to be recorded as a write strategy (WS). In such a case, write strategy parameters for 1st WS (WS-1), e.g., (n−1) write strategy type, to be used for 1� speed of a first recording layer (Layer 0) may have different values from that to be used for 2� speed of the a first recording layer (Layer 0).
For instance, if a type of a write strategy (WS) mandatory for the 1� speed is 1st WS (WS-1), disc information for 1� speed of a first recording layer is written in ‘00h’ and ‘01h’ as a disc information sequence and the 1st WS (WS-1) should be written as the write strategy (WS) in a mandatory manner. Disc information for 2� speed of the first recording layer is written in ‘02h’ and ‘03h’ and 2nd WS (WS-2) is selected to be recorded as the write strategy (WS) that can be optionally recorded. Hence, if the write strategy (WS) type mandatory for 1� speed is the 2nd WS (WS-2), it is apparent that the 2nd WS (WS-2) should be recorded in a mandatory manner as well as ‘00h’ and ‘01h’ as the disc information sequence record the disc information of 1� speed therein.
FIGS. 5A to 5C are diagrams of an another example of recording disc information according to a second embodiment of the present invention, in which ‘applicable writing speed information’ and ‘recording layer information existing within disc’ are recorded within the corresponding disc information as well as one of a plurality types of write strategies (WS) defined by a specification.
Referring to FIG. 5A, ‘DI frame sequence number in DI block’ is provided to 5th byte of each disc information to mean a sequence, which means that disc informations are configured in a specific sequence in the same manner of FIG. 4A. And, ‘Write Strategy Type (WS)’field is provided to a specific area (Nth byte) within disc information to record a type of WS applied to the corresponding disc information.
Besides, writing speed information applicable by a corresponding disc is recorded within a specific area (Mth byte) within disc information, which is named ‘Writing speed flag’ field.
For instance, whether a specific writing speed of eight kinds of writing speeds is applicable by the corresponding disc is represented by 1-bit each in the same area having 1-byte allocated thereto. Namely, it can be defined that the corresponding writing speed is not applicable (supported) if a bit value is ‘0b’ in entire bits or that the corresponding writing speed is applicable (supported) if the bit value is ‘1b’. Hence, each of the bits b0˜b7 within 1-byte becomes flag information indicating presence or non-presence of applicability of a specific writing speed.
In the above explanation, 1� and 2� speeds utilized by every disc almost are previously decided to be adopted. Yet, writing speeds decided by specification can be used as the rest writing speeds from 3rd writing speed. For instance, it is possible to set 3rd, 4th, 5th, 6th 7th, and 8th writing speeds (3rd�, 4th�, 5th�, 6th�, 7th�, 8th�) to 5�, 6�, 8�, 12�, 14�, and 16� speeds, respectively.
Since limitation is put on the number of the currently considered recording layer(s), which is currently two recording layers, 4-bits within the Lth byte are enough to represent total fifteen recording layers (in case of ‘1111’). In such a case, it is apparent that other valid information can be written in the rest area (4-bits) of the Lth byte.
Moreover, a specific ‘Write Strategy (WS) parameters’ field interoperating with a ‘Write Strategy (WS) Type’ field value of the Nth byte is provided to another specific area (Pth˜111th bytes) to record associated information therein.
Thus, from the above-recorded ‘writing speed information’ in the Mth byte and the ‘recording layer information’ in the Lth byte, a record playback apparatus (FIG. 9) recognizes how many disc informations exist within the corresponding disc. Namely, the number of the existing disc informations is found by multiplying an applicable writing speed number by the number of recording layers.
As the present invention applies one write strategy (WS) to a specific writing speed and a specific recording layer, the kind (type) and number of the write strategy (WS) may not be taken into consideration in deciding the number of disc information(s). Yet, in a third embodiment of the present invention (FIG. 6˜FIG. 8), it will be described that a plurality of write strategies (WS) can exist for a specific writing speed and a specific recording layer. In such a case, the total number of the existing disc informations is not always found by multiplying an applicable writing speed number by the number of recording layers. This will be explained in detail later in FIG. 6.
For example, by knowing that four writing speeds applicable by a disc exist if the Nth byte is ‘0000 1111’ and that two recording layers exist within the disc if the Lth byte is ‘0000 0010’, total eight disc informations are needed so that the sequence will be ‘00h˜07h’. And, it is previously decided that disc informations of ‘00h’, ‘01h’, ‘02h’, ‘03h’, ‘04h’, ‘05h’, ‘06h’, and ‘07h’ relate to ‘1� speed, 1st recording layer’, ‘1� speed, 2nd recording layer’, ‘2� speed, 1st recording layer’, ‘2� speed, 2nd recording layer’, ‘3rd writing speed, 1st recording layer’, ‘3rd writing speed, 2nd recording layer’, ‘4th writing speed, 1st recording layer’, and ‘4th writing speed, 2nd recording layer’.
Hence, in order to acquire the disc information for a specific target writing speed and a specific target recording layer, the record playback apparatus (FIG. 10) is facilitated to check which disc information is related to the specific target writing speed and recording layer from ‘writing speed information’ of the Nth byte and ‘recording layer information’ of the Lth byte commonly recorded within the respective disc informations instead of playing back to check the entire disc informations.
FIG. 5B shows an example of recording disc information according to the second embodiment of the present invention in FIG. 5A. It can be known that there are two (1�, 2�) applicable writing speeds from Mth byte (‘0000 0011b’) commonly recorded in the entire disc informations and that two recording layers exist within a disc from Lth byte (‘0000 0010b’).
Hence, in the example of FIG. 5B, total four disc informations (two recording layers*two writing speeds) exist and a sequence of the disc informations becomes ‘00h’ (1�,L0)→‘01h’ (1�,L1)→‘02h’ (2�,L0)→‘03h’ (2�,L1). This is done by a specified content according to a predetermined sequence. Thus, the entire disc informations should be configured according to the above manner to enable reciprocal compatibility for utilization.
An intrinsic write strategy (WS) is recorded within each disc information. Specifically, information of a type of a write strategy (WS) written in Pth˜111th bytes within the corresponding disc information is recorded in Nth byte. Namely, informations in the Nth and Pth˜111th bytes can differ in each disc information, which means that a disc manufacturer enables to optionally record one of a plurality of WSs.
In the example in FIG. 5B, ‘00h’ (1�,L0) and ‘01h’ (1�,L1) relate to the application of a first type write strategy (WS-1) and ‘02h’ (2�,L0) and ‘03h’ (2�,L1) relate to the application of a second type write strategy (WS-2).
FIG. 5C shows another example of recording disc information according to the second embodiment of the present invention in FIG. 5A. It can be known that there are eight (1�, 2�, . . . , 16�) applicable writing speeds from Mth byte (‘1111 1111b’) commonly recorded in the entire disc informations and that four recording layers exist within a disc from Lth byte (‘0000 0100b’).
Hence, in the another example of FIG. 5C, total thirty-two disc informations (four recording layers*eight writing speeds) exist and a sequence of the disc informations becomes ‘00h’ (1�,L0)→‘01h’ (1�,L1)→‘02h’ (1�,L2)→‘03h’ (1�,L4)→‘04h’ (2�,L0)→ . . . →‘31h’ (16�,L4). This is done by a specified content according to a predetermined sequence. Thus, the entire disc informations should be configured according to the above manner to enable reciprocal compatibility for utilization.
In the another example of FIG. 5C, if a record playback unit (FIG. 10) intends to search disc information related to 2� speed (2�,L0) of a first recording layer to perform recording by applying a write strategy (WS) within the corresponding disc information, it can be known from the informations in the Mth and Lth bytes commonly recorded in the entire disc informations that total thirty-two disc informations (four recording layers*eight writing speeds) exist in the corresponding disc according to the sequence of the disc informations such as ‘00h’ (1�,L0)→‘01h’(1�,L1)→‘02h’(1�,L2)→‘03h’(1�,L4)→‘04h’(2�,L0) → . . . →‘31h’ (16�,L4). Hence, the record playback apparatus (FIG. 9) enables to recognize that the disc information related to the 2� speed (2�,L0) of the first recording layer to be searched is ‘04h’ and that the corresponding disc information (‘04h’) is recorded as the first type write strategy (WS-1) from the write strategy (WS) type identification information (‘0000 0001b’) recorded in the Nth byte within the corresponding information (‘04h’), thereby reading out parameter values of the first type write strategy (WS-1) via the Pth˜111th bytes to utilize in the recording.
Likewise, if intending to search disc information related to 16� speed (16�,L3) of a fourth recording layer to perform recording by applying a write strategy (WS) within the corresponding disc information, the record playback unit (FIG. 9) recognizes that the corresponding disc information is ‘31h’ via the same process and that the write strategy type (WS) is the second type (WS-2), thereby enabling to utilize them in the recording.
For instance, the information is recorded in 5th byte within disc information, is named ‘DI frame sequence number in DI block’, and is briefly represented by ‘00h, 01h, 02h, . . . ’. Namely, if the information of the 5th byte is ‘00h’, it means 1st disc information. If the information of the 5th byte is ‘07h’, it means 8th disc information.
‘00h’ of 1st disc information is related to 1� speed, 1st recording layer L0, and WS1. ‘01h’ of 2nd disc information is related to 1� speed, 1st recording layer L0, and WS2. ‘02h’ of 3rd disc information is related to 1� speed, 2nd recording layer L1, and WS1. ‘03h’ of 4th disc information is related to 1� speed, 2nd recording layer L1, and WS2. ‘04h’ of 5th disc information is related to 2� speed, 1st recording layer L0, and WS1. ‘05h’ of 6th disc information is related to 2� speed and 1st recording layer L0, and WS3. ‘06h’ of 7th disc information is related to 2� speed, 2nd recording layer L1, and WS1. And, ‘07h’ of 8th disc information is related to 2� speed, 2nd recording layer L1, and WS3.
Referring to FIG. 7A, ‘DI frame sequence number in DI block’ is provided to 5th byte of each disc information to mean a sequence, which means that disc informations are configured in a specific order (writing speed→recording layer→WS type) of priority in FIG. 6.
And, ‘Write Strategy (WS) Type’ field (Nth byte), ‘Writing speed flag’ field (Mth byte), ‘Number of Recording Layer’ field (Lth byte), and ‘Write Strategy (WS) parameters’ field (Pth˜111th bytes) are recorded in Nth, Mth, Lth, and Pth˜111th bytes, respectively. Meaning of each information recorded in the fields is the same of that of the second embodiment (FIG. 5A).
In FIG. 7A, ‘Writing speed flag=0000 0111b’ of Mth byte means that three kinds of writing speeds are applicable. And, ‘Number of Recording layer=0000 0010b’ of Lth byte means two recording layers exist.
Moreover, information informing a write strategy (WS) type applicable by a corresponding disc via specification is recorded in another specific area (Kth byte) within disc information, which is named ‘Write Strategy (WS) flag’ field. For instance, whether a specific write strategy (WS) of eight kinds of write strategy (WS) types is applicable by the corresponding disc is represented by 1-bit each in the same area having 1-byte allocated thereto. Namely, it can be defined that the corresponding write strategy (WS) is not applicable (supported) if a bit value is ‘0b’ in entire bits or that the corresponding write strategy (WS) is applicable (supported) if the bit value is ‘1b’. Hence, each of the bits b0˜b7 within 1-byte becomes flag information indicating presence or non-presence of applicability of a specific write strategy (WS) type. For instance, if 1st to 3rd write strategy (WS) types WS1 to WS3 are applicable by a corresponding disc only, ‘0000 0111b’ is written in Lth byte. If all of the eight kinds of write strategy (WS) types WS1 to WS8 are applicable, ‘1111 1111b’ is written in the Lth byte. In FIG. 7A, ‘0000 1111b’ is written in the Kth byte to allow four write strategy (WS) types WS1 to WS4.
Namely, it is able to record disc information using write strategy (WS) types (two types) less than total applicable write strategy (WS) types (four types) per writing speed. And, it is able to confirm or verify the intrinsic write strategy (WS) applied to each disc information via ‘Write Strategy (WS0 Type’ field (Nth byte) and ‘Write Strategy (WS) parameters’ field (Pth˜111th bytes).
FIG. 7B shows another example of recording disc information according to the third embodiment of the present invention in FIG. 6. Like FIG. 7A, three kinds of applicable writing speeds exist and ‘0000 0111b’ is written in Mth byte. Four applicable write strategy types exist and ‘0000 1111b’ is written in Kth byte. And, two recording layers exist within a disc and ‘0000 0010b’ is written in Lth byte.
Namely, both disc information ‘00h’ and disc information ‘01h’ relate to 1� speed (1�) and 1st recording layer (L0). Yet, the WS1 type recorded in ‘00h’ as preferentially provided disc information becomes the preferred WS and the WS1 type information recorded in ‘01h’ as a next provided one becomes the alternative WS.
Referring to FIG. 8, ‘Write Strategy (WS) Type’ field (Nth byte), ‘Writing speed flag’ field (Mth byte), ‘Write Strategy (WS) flag’ field (Kth byte), ‘Number of Recording Layer’ field (Lth byte), and ‘Write Strategy (WS) parameters’ field (Pth˜111th bytes) are recorded in Nth, Mth, Kth, Lth, and Pth˜111th bytes, respectively. Meaning of each information recorded in the fields is the same of that of the second embodiment (FIG. 7B).
And, ‘Best WS flag in Writing speed’ field is provided to another specific area (Qth byte) within disc information, whereby a disc manufacturer provides information of a WS indicating a best quality among a plurality of write strategies (WS) existing per same writing speed. For example, FIG. 8 shows that 2nd WS (WS2) is the ‘Best WS’ of eight applicable WSs at a specific writing speed.
In case that a plurality of WSs enable to exist for the same writing speed/recording layer like FIG. 7A, an optical record playback apparatus (FIG. 10) is unable to distinguish which is the most appropriate WS for a corresponding writing speed. Hence, the optical record play back apparatus computes the optimal WS by applying the entire WSs provided to the disc information. Yet, by providing the ‘Best WS flag in Writing speed’ field to the Qth byte, it is able to apply to utilize the WS recorded in the Qth byte preferentially.
In case that a plurality of WSs exist for the same writing speed/recording layer like FIG. 7B, it is able to recognize the WS recorded in 1st disc information as the preferred WS by a previously specified decided method. Yet, by providing the ‘Best WS flag in Writing speed’ field to the Qth byte, it is able to reconfirm the preferred WS as well. Moreover, in case that the preferred WS recorded in the 1st disc information for the same writing speed/recording layer is different from the ‘Best WS flag in Writing speed’ information of the Qth byte, e.g., if the preferred WS is ‘mandatory WS’ decided in a mandatory manner, a priority is given to the information of the Qth byte provided by a disc manufacturer, thereby enabling to provide the information more efficiently in deciding the optimal WS at the same writing speed.
Referring to FIG. 9A, the information enabling 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 instance, 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.
Referring to FIG. 9B, Nth byte of disc information indicates a disc information type, 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.
FIG. 9D shows another example of recording control information according to the fourth embodiment of the present invention, in which specific identification for CAV mode is subdivided to be applied to ‘DI Type’ field written in Nth byte within disc information and in which information designating a write strategy (WS) type is recorded as well.
Referring to FIG. 9D, in case that corresponding disc information means CAV mode, this is subdivided to identify how many velocities are provided by a write strategy (WS). Hence, ‘DI Type’ field can be defined as follows. If ‘DI Type’ field recorded in Nth byte is ‘0000 0001b’, it means CAV mode and a write strategy (WS) recorded in Lth˜111th bytes is recorded to correspond to one kind of velocity only. If ‘DI Type’ field recorded in Nth byte is ‘0000 0010b’, it means CAV mode and a write strategy (WS) recorded in Lth˜111th bytes is recorded to correspond to two kinds of velocities. If ‘DI Type’ field recorded in Nth byte is ‘0000 0011b’, it means CAV mode and a write strategy (WS) recorded in Lth˜111th bytes is recorded to correspond to three kinds of velocities.
Referring to FIG. 9E, ‘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 1 WS WS-1. 5th byte is ‘00h’ to mean 1� speed disc information of 1 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 ‘DI Type’ field (Nth byte) is set to ‘0000 0001b’ to mean a CAV mode, or if ‘Write Strategy (WS) Type’ field is set to ‘0000 0010b’ to mean 2nd WS WS-2, it is apparent that write strategy (WS) parameters written in Lth˜111th bytes should be recorded as new contents different from the parameters specified in FIG. 9E or the values of the corresponding parameters.
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No. 12/068,919 dated Sep. 23, 2008.Classifications U.S. Classification369/47.27International ClassificationG11B7/24, G11B7/007, G11B, G11B7/0045, G11B5/09, G11B7/00Cooperative ClassificationG11B7/0079, G11B2007/0013, G11B7/00456, G11B7/00736European ClassificationG11B7/007R, G11B7/007Z, G11B7/0045SLegal EventsDateCodeEventDescriptionSep 20, 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