Source: http://www.docstoc.com/docs/57714546/Method-Of-Recording-Data-On-A-Multi-layer-Recording-Medium-Recording-Medium-And-Apparatus-Thereof---Patent-7596064
Timestamp: 2014-09-01 12:13:04
Document Index: 102335915

Matched Legal Cases: ['Application No. 07120273', 'Application No. 200710127832', 'Application No. 2006', 'Application No. 2006', 'Application No. 2006', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 10']

Method Of Recording Data On A Multi-layer Recording Medium, Recording Medium, And Apparatus Thereof - Patent 7596064
United States Patent: 7596064
7,596,064
Method of recording data on a multi-layer recording medium, recording
medium, and apparatus thereof
A method for recording data on a recording medium having one or more
recording layers. The method includes reading control information
including a plurality of control information units for controlling
recording/reproducing of data from the recording medium. The control
information unit includes a recording speed, an identifier of the
recording layer, and a write strategy information depending on the
recording speed, where a sequence of the information units is ordered
according to the recording speed. The method further provides for
recording the data on the recording layer based on the read control
information unit including the identifier of the corresponding recording
layer on which the data is to be recorded.
Kim; Jin Yong (Seongnam-si, KR), Suh; Sang Woon (Seoul, KR)
11/723,805
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Primary Examiner: Tran; Thang V
This is a continuation application of application Ser. No. 10/880,663
filed Jul. 1, 2004, the entire contents of which are hereby incorporated
1.  A method for recording data on a recording medium having one or more recording layers, the method comprising: accessing control information for controlling
recording/reproducing of data from the recording medium, the control information including a plurality of information units, each information unit including a first identifier identifying the recording layer to which the corresponding information unit
applies and a second identifier indentifying a recording speed applicable to the corresponding recording layer, wherein a sequence of at least one information units is ordered according to increasing recording speed among the information units, and for a
same recording speed, the sequence of the at least one information unit is ordered according to ascending recording layer number among the information units;  and recording data on the recording medium based on the control information.
2.  The method of claim 1, wherein the accessing step further accesses write strategy information included in each information unit, the write strategy information including write strategy parameters, the write strategy parameters corresponding
to recording power and pulse timing usable at the recording speed applicable to the recording layer during recording data.
3.  The method of claim 2, wherein the accessing step further accesses a write strategy identifier included in each information unit, the write strategy identifier indicating a write strategy type, the write strategy type is one of n-1 write and
n/2 write strategy.
4.  The method of claim 1, wherein the accessing step accesses the control information from a sub-area of a lead-in area of the recording medium.
5.  The method of claim 1, wherein each information unit further includes sequence number information indicating a sequence of the information unit among the information units included in the control information.
6.  A method for recording data on a recording medium having one or more recording layers, the method comprising: storing control information, the control information including a plurality of information units, each information unit including a
first identifier identifying the recording layer of the recording medium to which the corresponding information unit applies and a second identifier identifying a recording speed applicable to the corresponding recording layer, wherein a sequence of at
least one information units is ordered according to increasing recording speed among the information units, and for a same recording speed, the sequence of the at least one information unit is ordered according to ascending recording layer number among
the information units;  and recording data on the recording medium based on the stored control information.
7.  The method of claim 6, wherein each information unit further includes write strategy information, the write strategy information including write strategy parameters, the write strategy parameters corresponding to recording power and pulse
timing usable at the recording speed applicable to the recording layer during recording of data.
8.  The method of claim 7, wherein each information unit further includes a write strategy identifier, the write strategy identifier indicating a write strategy type, and the write strategy type is one of n-1 write strategy and n/2 write
9.  The method of claim 6, wherein each information unit further includes sequence number information indicating a sequence of the information unit among the information units included in the control information.
10.  A computer-readable medium, comprising: a specific area of the computer-readable medium storing control information for controlling recording of data, the control information including a plurality of information units, each information unit
including a first identifier identifying the recording layer to which the corresponding information unit applies and a second identifier identifying a recording speed applicable to the corresponding recording layer, wherein a sequence of at least one
information units is ordered according to increasing recording speed among the information units, and for a same recording speed, the sequence of the at least one information unit is ordered according to ascending recording layer number among the
information units.
11.  The computer-readable medium of claim 10, wherein each information unit further includes write strategy information, the write strategy information including write strategy parameters, the write strategy parameters corresponding to
recording power and pulse timing usable at the recording speed applicable to the recording layer during recording of data.
12.  The computer-readable medium of claim 11, wherein each information unit includes a write strategy identifier, the write strategy identifier indicating a write strategy type, and the write strategy type is one of n-1 write strategy and n/2
write strategy.
13.  The computer-readable medium of claim 10, wherein each information unit further includes a write strategy type identifier indicating write strategy type and the write strategy type is one of n-1 write strategy and n/2 write strategy.
14.  The computer-readable medium of claim 10, wherein the specific area is a pre-recorded area of the computer-readable medium.
15.  The computer-readable medium of claim 14, wherein the pre-recorded area is a sub-area of a lead-in area or lead-out area.
16.  The computer-readable medium of claim 15, wherein the sub-area of the lead-in or lead-out area is a permanent information and control data (PIC) zone of the lead-in area or the lead-out area disclosed in Blu-ray disc.
17.  The computer-readable medium of claim 10, wherein each information unit further includes sequence number information indicating a sequence of the information unit among the information units included in the control information.
18.  A computer-readable medium, comprising: at least one recording layer provided with a recordable area and a control area, the control area storing information units, each information unit including a first identifier identifying the
recording layer to which the corresponding information unit applies and a second identifier identifying a recording speed applicable to the corresponding recording layer, wherein a sequence of at least one information units is ordered according to
increasing recording speed among the information units, and for a same recording speed, the sequence of the at least one information unit is ordered according to ascending recording layer number among the information units.
19.  The computer-readable medium of claim 18, wherein the computer-readable medium is a recordable Blu-ray disc.
20.  The computer-readable medium of claim 18, wherein at least one information unit is provided for the same recording speed and wherein, if a plurality of information units are provided for the same recording speed, the information unit for a
preferred write strategy is followed by the information unit for an alternative write strategy.
21.  The computer-readable medium of claim 20, wherein each information unit includes write parameters for the write strategy.
22.  The computer-readable medium of claim 18, wherein each information unit further includes sequence number information indicating a sequence of the information unit among the information units included in the control information.
23.  The computer-readable medium of claim 18, wherein each information unit includes a write strategy identifier, the write strategy identifier indicating a write strategy type, and the write strategy type is one of n-1 write strategy and n/2
24.  An apparatus for recording or reproducing data on or from a recording medium, comprising: an optical pickup configured to record or read data on or from the recording medium, and a controller configured to identify a recording speed for a
recording layer of the recording medium based on control information, the control information including a plurality of information units, each information unit including a first identifier identifying the recording layer to which the corresponding
information unit applies and a second identifier identifying a recording speed applicable to the corresponding recording layer, wherein a sequence of at least one information units is ordered according to increasing recording speed among the information
units, and for a same recording speed, the sequence of the at least one information unit is ordered according to ascending recording layer number among the information units, and the controller configured to control a recording of data on the recording
medium based on at least one information unit.
25.  The apparatus of claim 24, further comprising: an interface configured to interface the controller with an external device.
26.  The apparatus of claim 24, wherein each information unit includes write strategy information, the write strategy information including write strategy parameters, the write strategy parameters corresponding to recording power and pulse
timing usable at the recording speed applicable to the recording layer during recording of data;  and the controller is configured to control the optical pickup based on the write strategy parameters of at least one information unit during recording of
27.  The apparatus of claim 26, wherein each information unit includes a write strategy identifier, the write strategy identifier indicating a write strategy type, and the write strategy type is one of n-1 write strategy and n/2 write strategy;
and the controller is configured to control the optical pickup based on the write strategy type of at least one information unit during recording of the data.
28.  The apparatus of claim 24, wherein the controller is configured to control the optical pickup to access the control information from a sub-area of a lead-in area of the recording medium.
29.  The apparatus of claim 24, wherein each information unit further includes sequence number information indicating a sequence of the information unit among the information units included in the control information.
30.  An apparatus for recording or reproducing data on or from a recording medium, comprising: a memory configured to store a plurality of disc control information, each disc control information including a first identifier identifying the
recording layer to which the corresponding disc control information applies and a second identifier identifying a recording speed applicable to the corresponding recording layer, wherein a sequence of at least one disc control information is ordered
according to the increasing recording speed among the information units, and for a same recording speed, the sequence of the at least one information unit is ordered according to ascending recording layer number among the information units;  an optical
pickup configured to read or write data from or on the recording medium;  and a controller, operatively coupled to the memory and the optical pickup, configured to control the optical pickup to record data on the recording medium based on at least one of
the disc control information.
31.  The apparatus of claim 30, further comprising: an interface configured to interface the controller with an external device.
32.  The apparatus of claim 30, wherein each information unit includes write strategy information, the write strategy information including write strategy parameters, the write strategy parameters corresponding to recording power and pulse
33.  The apparatus of claim 32, wherein each information unit includes a write strategy identifier, the write strategy identifier indicating a write strategy type, and the write strategy type is one of n-1 write strategy and n/2 write strategy;
34.  The apparatus of claim 30, wherein each information unit further includes sequence number information indicating a sequence of the information unit among the information units included in the control information.
This application claims the benefit of the Korean Application No. 10-2003-0046420 filed on Jul.  9, 2003, Korean Application No. 10-2003-0063271 filed on Sep. 9, 2003, Korean Application No. 10-2003-0063591 filed on Sep. 15, 2003, and Korean
Application No. 10-2003-0065628 filed on Sep. 22, 2003, which are hereby incorporated by reference.
The present invention relates to recording media, and more particularly, to a method of recording disc control information on a recordable optical disc including at least one recording layer, in which writing speed information and per writing
speed write strategy information (write strategy parameters) are included within the recorded disc control information, and to method of recording data using the disc control information recorded in a specific area of the recordable optical disc.
A high density optical recording medium, known as HD-DVD, is widely used to record and store high-definition video data, large-amount program data, and high-quality audio data and so on.  The Blu-ray disc represents next-generation HD-DVD
technology.  Technological specifications are now being established for the global standardization of the Blu-ray disc, including standards for the write once Blu-ray disc (BD-WO).  Meanwhile, a rewritable Blu-ray disc, known as the 1.times.-speed BD-RE
and now being discussed, should be compatible with BD-RE discs expected to have higher writing speeds, i.e., the 2.times.-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.
One exemplary embodiment relates to a method for recording data on a recording medium having one or more recording layers.  The method provides for reading control information including a plurality of control information units for controlling
recording/reproducing of data from the recording medium.  The control information unit includes a recording speed, an identifier of the recording layer, and a write strategy information depending on the recording speed.  A sequence of the information
units is ordered according to the recording speed.  Thereafter, the method calls for recording the data on the recording layer based on the read control information unit including the identifier of the corresponding recording layer on which the data is
Another exemplary embodiment relates to an apparatus for recording data on a recording medium having one or more recording layers.  The apparatus having a pick-up part for reading control information including a plurality of control information
units for controlling recording/reproducing of data from the recording medium.  The control information unit includes a recording speed, an identifier of the recording layer, and a write strategy information depending on the recording speed, where a
sequence of the information units is ordered according to the recording speed.  The apparatus also includes a controller for controlling recording the data on the recording layer based on the read control information unit including the identifier of the
corresponding recording layer on which the data is to be recorded.
Another exemplary embodiment relates to a recording medium having one or more recording layers.  A data area is configured to record user data on each recording layer.  One or more management areas are configured to record at least one control
information block including a plurality of control information unit for controlling recording/reproducing of a user data.  The control information unit includes a recording speed, an identifier of the recording layer, and a write strategy information
depending on the recording speed, where a sequence of the information units is ordered according to the recording speed.  A data area is configured to record the user data based on the read control information unit including the identifier of the
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.
Besides, although terms used in the present invention are possibly selected from the currently well-known ones, some terms are arbitrarily chosen by the applicant in some cases so that their meanings are explained in detail in the following
description.  Hence, the present invention should be understood with the intended meanings of the corresponding terms chosen by the applicant instead of the simple names or meanings of the terms themselves.
First of all, `disc control information` in the description of the present invention means an area including various information for disc record playback or information for disc record playback.  And, the disc control information is commonly
designated information provided to a prerecorded area within a disc or to an embossed area for a disc user by a disc manufacturer.  Yet, the disc control information is provided not only to the prerecorded area but also to a recordable area.  The disc
information within the prerecorded or embossed area can be copied to the recordable area as well.  And, they are just exemplary.
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.
FIG. 1 and FIG. 2 are structural diagrams of optical discs according to the present invention, in which a recordable optical disc is enough to be the optical disc applicable to the present invention.  Moreover, the recordable disc can be any one
of a rewritable optical disc, a write-once optical disc, and the like.
Referring to FIG. 1, a lead-in area is provided as a management area on an inner circumference area of an optical disc, whereas a lead-out area is provided as a management area on an outer circumference area of the optical disc.  Specifically, a
prerecorded area and a rewritable or write-once area are separated from each other within the inner circumference area of the disc.
The prerecorded area is an area (called `embossed area`) where data was already written in manufacturing the disc, whereby a user or system is unable to perform data writing on the prerecorded area at all.  In BD-RE/WO, the prerecorded area is
named PIC (permanent information and control data) area.  And, the above-described disc information (hereinafter called `DI`) as information required for disc recording is recorded in the PIC area.
In a data area, provided are a user data area where user&#39;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 to such a write-once optical disc as BD-WO.  In case of the re-writable BD (BD-RE), TDMA is unnecessary so that such an area is left as a reserved area.
The present invention intends to provide a method of efficiently recording disc information (DI) as disc 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 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.
FIG. 2 is a diagram of a dual-layer disc having dual recording layers, in which a recording layer starting with a lead-in is named a first recording layer Layer0 and a recording layer ending with a lead-out is named a second recording layer
Layer1.
FIG. 3 is a structural diagram of a PIC area in the disc shown in FIG. 1 or FIG. 2.  As mentioned in the foregoing description, it means that information can be rearranged like the structure of the PIC area in FIG. 3 when the entire information
within the high frequency modulated PIC area is acquired.
In BD-RE/WO, `one cluster` represents a minimum record unit, five hundred forty-four clusters gather to construct one fragment as one upper record unit, and total five fragments gather to form the PIC area.  Disc information is recorded in a
front head cluster of a first fragment IF0.  The disc information is plurally recorded per recording layer and writing speed permitted by the corresponding optical disc, and 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, thereby enabling to cope with 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 record playback of the corresponding optical disc, thereby enabling to provide optimal recording power per recording layer and per writing speed.
Namely, the disc information (DI) of the present invention is characterized in providing specific writing speed information supported by the corresponding disc and associated write strategy information, and more specifically, in providing
specific writing speed supported for each recording layer and associated write strategy information via a specified method in case that a plurality of recording layers exist in the corresponding disc.
And, the specific configuration of the disc information (DI) relates to that of Blu-ray disc (BD).  It is also apparent that a DVD based disc may have a configuration different from the above-explained structure.  Specifically, if a size of disc
information (DI) corresponds to that of BD, it is 112 bytes equivalently for example.  Yet, by regarding disc information (DI) of the same recording layer as one information to provide once without repeating common information, it may be able to
configure the write strategy differing per writing speed only in addition.
Various embodiments for a method of configuring disc information and a method of recording specific information and the like within disc information according to the present invention are explained in detail by referring to the attached drawings
FIGS. 4 to 7C are diagrams for a method of recording disc information of an optical disc according to a first embodiment of the present invention, in which disc information is configured per writing speed and in which disc information is
configured in a specific sequence per recording layer within each corresponding writing speed.
Referring to FIG. 4, a sequence for disc information each is decided by a sequence number and is recorded by 1-byte.  For instance, the information is recorded in a 5.sup.th 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 5.sup.th byte is `00h`, it means 1.sup.st disc information.  If the information of the 5.sup.th byte is `07h`, it means 8.sup.th disc information.
In configuring disc information, the present invention is characterized in that disc information is separately provided per writing speed and per recording layer and that a configuration sequence of a plurality of the separately provided disc
informations is uniformly decided according to a predetermined manner.
For instance, if a corresponding optical disc includes a pair of recoding layers and four kinds of applicable writing speeds (e.g., 1 speed, 2.times.  speed, 3.times.  speed, and 4.times.  speed) exist, disc information can be configured in a
`00h` of 1.sup.st disc information is related to 1.times.  speed and 1.sup.st recording layer L0.  `01h` of 2.sup.nd disc information is related to 1.times.  speed and 2.sup.nd recording layer L1.  `02h` of 3.sup.rd disc information is related to
2.times.  speed and 1.sup.st recording layer L0.  `03h` of 4.sup.th disc information is related to 2.times.  speed and 2.sup.nd recording layer L1.  `04h` of 5.sup.th disc information is related to 3.times.  speed and 1.sup.st recording layer L0.  `05h`
of 6.sup.th disc information is related to 3.times.  speed and 2.sup.nd recording layer L1.  `06h` of 7.sup.th disc information is related to 5.times.  speed and 1.sup.st recording layer L0.  And, `07h` of 8.sup.th disc information is related to 5.times. speed and 2.sup.nd recording layer L1.
Namely, in configuring disc information, the present invention is characterized in that at least one disc information is configured per writing speed and the respective per writing speed disc informations are reconfigured per recording layer.
Hence, the writing speed is preferred in the sequence of configuring the disc informations to a recording layer type.
FIG. 5A exemplarily shows a method of configuring disc information according the first embodiment of the present invention in FIG. 4, in which total sixteen disc informations are configured in case that four kinds of applicable writing speeds
(e.g., 1.times., 2.times., 433 , and 6.times.) and four recording layers (L0, L1, L2, and L3) exist within a disc.
Referring to FIG. 5A, 1.sup.st to 4.sup.th disc informations 00h to 03h become disc information for 1.times.  speed, 5.sup.th to 8.sup.th disc informations 04h to 07h become disc information for 2.times.  speed, 9.sup.th to 12.sup.th disc
informations 08h to 11h become disc information for 4.times.  speed, and 13.sup.th to 16.sup.th disc informations 02h to 15h become disc information for 6.times.  speed.
And, per writing speed disc informations come into configuring separate disc informations per recording layer to define as follows.  Namely, `00h`, `04h`, `08h`, and `12h` mean disc informations for 1.sup.st recording layer L0 at corresponding
writing speeds, respectively.  `01h`, `05h`, `09h`, and `13h` mean disc informations for 2.sup.nd recording layer L1 at corresponding writing speeds, respectively.  `02h`, `06h`, `10h`, and `14h` mean disc informations for 3.sup.rd recording layer L2 at
corresponding writing speeds, respectively.  And, `03h`, `07h`, `11h`, and `15h`mean disc informations for 4.sup.th recording layer L3 at corresponding writing speeds, respectively.
FIG. 5B exemplarily shows a method of configuring disc information according the first embodiment of the present invention in FIG. 4, in which total eight disc informations are configured in case that four kinds of applicable writing speeds
(e.g., 1.times., 2.times., 4.times., and 6.times.) and two recording layers (L0, L1) exist within a disc.
The disc information configuring method in FIG. 5B is as good as that in FIG. 5A.  First of al, per writing speed disc informations are preferentially configured and then reconfigured per recording layer.
FIG. 6A and FIG. 6B are exemplary diagrams of recording the disc control information according to the first embodiment of the present invention, in which intrinsic `recording layer information` and `writing speed information` are recorded within
Referring to FIG. 6A, `DI frame sequence number in DI block` is provided to 5.sup.th 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. 4.
Besides, recording layer information and recording velocity information to be used for corresponding disc information are represented by specific bits to be provided to a specific area, e.g., 7.sup.th byte, within the corresponding disc information each. For instance, the recording layer information and the recording velocity information are recorded in upper and lower 4-bits of the 7.sup.th byte, respectively.
The recording layer information is defined as follows.  First of all, `0000b` of the recording layer information means 1.sup.st recording layer L0.  `0001b` of the recording layer information means 2.sup.nd recording layer L1.  And, `1111b` of
the recording layer information means 16.sup.th recording layer L15.
Meanwhile, the recording velocity information enables to define 4-bits in various ways as follows.  Namely, `0000b`, `0001b`, `0011b`, `0111b`, and `1111b` are defined to mean 1.times.  speed, 2.times.  speed, 4.times.  speed, 8.times.  speed,
and 16.times.  speed, respectively.
Hence, the above-manners of defining the recording layer information and the recording velocity information can be defined in various ways via specification establishment.  For example, the recording layer or velocity information can be defined
by allocating 1-byte thereto.
Thus, the intrinsic recording layer and velocity informations corresponding to its sequence number, as shown in FIG. 6A, are recorded in a previously promised specific location (7.sup.th byte), whereby it is facilitated to confirm the recording
layer and velocity informations of the corresponding disc information.  And, write power or write parameters fitting the recording layer and velocity are recorded in detail using P.sup.th.about.111.sup.th bytes, thereby enabling efficient record playback
using the informations.
FIG. 6B shows an example of disc information including its intrinsic recording layer information and recording velocity information, in which total sixteen disc informations are configured in case that four kinds of applicable writing speeds
(e.g., 1.times., 2.times., 4.times., and 6.times.) and four recording layers (L0, L1, L2, and L3) exist within a disc.
The detailed configuring method of the disc information is the same in FIG. 5A.  Considering the example in FIG. 6A, each of the disc informations includes its intrinsic recording layer information and recording velocity information.  For
instance, upper 4-bits of 7.sup.th byte within `02h` of 3.sup.rd disc information is set to `0010` to indicate 3.sup.rd recording layer L2 and lower 4-bits thereof is set to `0000` to indicate 1.times.  speed, whereby it can be apparently represented
that the corresponding disc information relates to 1.times.  speed and 3.sup.rd recording layer.
For another instance, upper 4-bits of 7.sup.th byte within `14h` of 15.sup.th disc information is set to `0010` to indicate 3.sup.rd recording layer L2 and lower 4-bits thereof is set to `0101` to indicate 1.times.  speed, whereby it can be
apparently represented that the corresponding disc information relates to 6.times.  speed and 3.sup.rd recording layer.
FIGS. 7A to 7C are diagrams of an another example of recording disc information according to the first embodiment of the present invention, in which `disc-applicable writing speed information` and `recording layer information existing within
disc` are commonly recorded within the corresponding disc.
Referring to FIG. 7A, `DI frame sequence number in DI block` is provided to 5.sup.th 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. 4.
Besides, writing speed information applicable by a corresponding disc is recorded within a specific area (N.sup.th byte) within disc, 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.about.b7 within 1-byte becomes flag
information indicating presence or non-presence of applicability of a specific writing speed.  For instance, if 1.times.  speed is applicable by a corresponding disc only, `0000 0001` is written in N.sup.th byte.  If all of the eight kinds of writing
speeds are applicable, `1111 1111` is written in the N.sup.th byte.
In the above explanation, 1.times.  and 2.times.  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 3.sup.rd writing speed.  For
instance, it is possible to set 3.sup.rd, 4.sup.th, 5.sup.th, 6.sup.th, 7.sup.th, and 8.sup.th writing speeds (3.sup.rd.times., 4.sup.th.times., 5.sup.th.times., 6.sup.th.times., 7.sup.th.times., 8.sup.th.times.) to 5.times., 6.times., 8.times.,
12.times., 14.times., and 16.times.  speeds, respectively.
Meanwhile, recording layer information indicating the number of recording layer(s) existing within the corresponding disc is recorded in another specific area (L.sup.th byte) within the disc information, which is named `Number of Recording Layer`
field.  For instance, a value meaning the number of the recording layer(s) can be represented by a binary number in the same area having 1-byte allocated thereto.  In case that the recording layer is the single layer in FIG. 1, `0000 0001` is written in
the L.sup.th byte.  In case that the recording layer is the dual layer in FIG. 2, `0000 0010` is written in the L.sup.th byte.  In case that four recording layers exist, `0000 0100` is written in the L.sup.th byte.
Since limitation is put on the number of the currently considered recording layer(s), which is currently two recording layers, 4-bits within the L.sup.th 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 L.sup.th byte.
Moreover, identification information for identifying a kind of write strategy (WS) recorded in P.sup.th.about.111.sup.th bytes is written in another specific area (M.sup.th byte) within the disc information, which is named `Write Strategy (WS)
Type` field.
Namely, in the disc information of the present invention, one write strategy (WS) is recorded for a specific writing speed and a specific recording layer and the write strategy is optionally selected from various kinds of specified types by a
disc manufacturer.  Hence, if the corresponding disc information is a first type write strategy WS-1, `0000 0001` is written in the M.sup.th byte.  If the corresponding disc information is a second type write strategy WS-2, `0000 0010` is written in the
M.sup.th byte.  And, substantial write strategy (WS) is recorded in P.sup.th.about.111.sup.th bytes.  Yet, the substantial write strategy (WS) will be recoded as a value interoperating with the decided write strategy (WS) type in the M.sup.th byte.  The
write strategy (WS) type via the M.sup.th byte is optionally recordable in every disc information.  And, it is also possible to apply one specified write strategy (WS) type in 1.times.  speed disc information, which is expected to be supported by every
record playback apparatus (FIG. 10), in a mandatory manner.
The detailed recording method of the write strategy (WS) is not a major concern of the present invention.  Yet, in brief, 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, 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`.
And, the write strategy (WS) can be recorded in various ways.  As a disc becomes to be highly densified and to run at higher speed, a writing speed, i.e., disc RPM) as well as the medium property of the recording layer is considerably affected.
Hence, a more accurate system is requested.  And, the various write strategies (WS) are explained as follows for example.
First of all, there is a system having a recording pulse smaller by 1 than a recording mark size (n) formed on a recording layer medium, which may be called `(n-1) WS`.  Secondly, there is a system having a recording pulse having a size amounting
to a half of the recording mark size (n), which may be called `n/2 WS`.  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 recording power according to the write strategy (WS) recorded in the selected M.sup.th byte and then records a result of the test as write strategy
(WS) in the P.sup.th.about.111.sup.th bytes within the disc information.
From the above-recorded `writing speed information` in the N.sup.th byte and the `recording layer information` in the L.sup.th byte, the record playback apparatus (FIG. 10) 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) for 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 second embodiment of the present invention, 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.
Hence, a sequence of a plurality of the above-decided disc informations is decided by the sequence numbers, which is written in the 5.sup.th byte in the foregoing description, and each of the disc informations designates the previously decided
writing speed and recording layer by the sequence.
For example, by knowing that four writing speeds applicable by a disc exist if the N.sup.th byte is `0000 1111` and that two recording layers exist within the disc if the L.sup.th byte is `0000 0010`, total eight disc informations are needed so
that the sequence will be `00h.about.07h`.  And, it is previously decided that disc informations of `00h`, `01h`, `02h`, `03h`, `04h`, `05h`, `06h`, and `07h` relate to `1.times.  speed, 1.sup.st recording layer`, `2.times.  speed, 2.sup.nd recording
layer`, `2.times.  speed, 1.sup.st recording layer`, `2.times.  speed, 2.sup.nd recording layer`, `3.sup.rd writing speed, 1.sup.st recording layer`, `3.sup.rd writing speed, 2.sup.nd recording layer`, `4.sup.th writing speed, 2.sup.nd recording layer`,
and `4.sup.th writing speed, 2.sup.nd recording layer`, respectively.
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 N.sup.th byte and `recording layer information` of the L.sup.th byte commonly recorded within the respective disc informations instead of playing back to check the entire disc
FIG. 7B shows an example of recording disc information according to the first embodiment of the present invention in FIG. 7A.  It can be known that there are two (1.times., 2.times.) applicable writing speeds from N.sup.th byte (`0000 0010b`)
commonly recorded in the entire disc informations and that two recording layers exist within a disc from L.sup.th byte (`0000 0010b`).
Hence, in the example of FIG. 7B, total four disc informations (two recording layers*two writing speeds) exist and a sequence of the disc informations becomes `00h` (1.times.,L0).fwdarw.`01h` (1.times.,L1).fwdarw.`02h` (2.times.,L0).fwdarw.`03h`
(2.times.,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 in other bytes within each disc information as well as N.sup.th and L.sup.th bytes.  Specifically, information of a type of a write strategy (WS) written in P.sup.th.about.111.sup.th bytes within the
corresponding disc information is recorded in M.sup.th byte.  Namely, informations in the M.sup.th and P.sup.th.about.111.sup.th bytes can differ in each disc information.
In the example in FIG. 7B, `00h` (1.times.,L0) and `01h` (1.times.,L1) relate to the application of a first type write strategy (WS-1) and `02h` (2.times.,L0) and `03h` (2.times.,L1) relate to the application of a second type write strategy
(WS-2).
FIG. 7C shows another example of recording disc information according to the first embodiment of the present invention in FIG. 7A.  It can be known that there are eight (1.times., 2.times., .  . . , 16.times.) applicable writing speeds from
N.sup.th byte (`1111 1111b`) commonly recorded in the entire disc informations and that four recording layers exist within a disc from L.sup.th byte (`0000 0100b`).
Hence, in the another example of FIG. 7C, total thirty-two disc informations (four recording layers*eight writing speeds) exist and a sequence of the disc informations becomes `00h` (1.times.,L0).fwdarw.`01h`(1.times.,L1).fwdarw.`02h`
(1.times.,L2).fwdarw.`03h` (1.times.,L4).fwdarw.`04h` (2.times.,L0).fwdarw.  . . . .fwdarw.`31h` (16.times.,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.
corresponding disc information is recorded in M.sup.th byte.  Namely, informations in the M.sup.th and P.sup.th111.sup.th bytes can differ in each disc information.
In the another example of FIG. 7C, if a record playback unit (FIG. 10) intends to search disc information related to 2.times.  speed (2.times.,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 N.sup.th and L.sup.th 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.times.,L0).fwdarw.`01h` (1.times.,L1).fwdarw.`02h` (1.times.,L2).fwdarw.`03h` (1.times.,L4) .fwdarw.`04h` (2.times.,L0).fwdarw.  . . . .fwdarw.`31h` (16.times.,L4).
Hence, the record playback apparatus (FIG. 10) enables to recognize that the disc information related to the 2.times.  speed (2.times.,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 M.sup.th byte within the corresponding information (`04h`), thereby reading out parameter values of the first
type write strategy (WS-1) via the P.sup.th.about.111.sup.th bytes to utilize in the recording.
Likewise, if intending to search disc information related to 16.times.  speed (16.times.,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. 10) 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.
FIGS. 8 to 9B shows a method of recording disc information of an optical disc according to a second embodiment of the present invention, which is extended from the first embodiment of the present invention in FIG. 4.  The second embodiment of the
present invention is characterized in that disc information is configured per writing speed, disc information is configured per recording layer within the corresponding writing speed, and at least one write strategy (WS) is configured for each disc
information per corresponding recording layer.
For instance, the information is recorded in a 5.sup.th 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 5.sup.th byte is
`00h`, it means 1.sup.st disc information.  If the information of the 5.sup.th byte is `07h`, it means 8.sup.th disc information.
`00h` of 1.sup.st disc information is related to 1.times.  speed, 1.sup.st recording layer L0, and WS1.  `01h` of 2.sup.nd disc information is related to 1.times.  speed, 1.sup.st recording layer L0, and WS2.  `02h` of 3.sup.rd disc information
is related to 1.times.  speed, 2.sup.nd recording layer L1, and WS1.  `03h` of 4.sup.th disc information is related to 1.times.  speed, 2.sup.nd recording layer L1, and WS2.  `04h` of 5.sup.th disc information is related to 2.times.  speed, 1.sup.st
recording layer L0, and WS1.  `05h` of 6.sup.th disc information is related to 2.times.  speed and 1.sup.st recording layer L0, and WS3.  `06h` of 7.sup.th disc information is related to 2.times.  speed, 2.sup.nd recording layer L1, and WS1.  And, `07h`
of 8.sup.th disc information is related to 2.times.  speed, 2.sup.nd recording layer L1, and WS3.
Namely, in configuring disc information, the second embodiment according to the s present invention is characterized in that at least one disc information is configured per writing speed, the respective per writing speed disc informations are
reconfigured per recording layer, and at least one WS type is provided to each recording layer.
FIG. 9A exemplarily shows a method of configuring disc information according the second embodiment of the present invention in FIG. 8, in which total sixteen disc informations are configured in case that four kinds of applicable writing speeds
Referring to FIG. 9A, `DI frame sequence number in DI block` is provided to 5.sup.th byte of each disc information to mean a sequence, which means that disc informations are configured in a specific order (writing speed.fwdarw.recording
layer.fwdarw.WS type) of priority in FIG. 8.  Besides, writing speed information applicable by a corresponding disc is recorded within a specific area (N.sup.th byte) within disc, 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.about.b7 within 1-byte becomes flag information indicating presence or non-presence of applicability of a specific writing speed.  For instance, if 1.times.  speed is applicable by a corresponding disc only, `0000 0001` is written in N.sup.th
byte.  If all of the eight kinds of writing speeds are applicable, `1111 1111` is written in the N.sup.th byte.  In the drawing, `0000 0111b` is written in the N.sup.th byte to allow 1.sup.st to 3.sup.rd writing speeds.
instance, it is possible to set 3.sup.rd, 4.sup.th, 5.sup.th, 6.sup.th, 7.sup.th, and 8.sup.th writing speeds (3.sup.rd.times., 4.sup.th.times., 5.sup.th.times., 6.sup.th.times., 7.sup.th.times., 8.sup.th.times.) to 4.times., 6.times., 8.times.,
And, information of informing a kind of write strategy (WS) applicable by a specification of a corresponding disc is recorded in another specific area (L.sup.th byte) within the disc information, which is named `Write Strategy (WS) flag` field.
For instance, whether a specific write strategy (WS) of eight kinds of write strategies (WS) 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 applicability of a specific write strategy (WS).  For instance, if 1.sup.st to 3.sup.rd type write strategies WS1 to WS3 are applicable by a corresponding disc only, `0000 0111b` is written in L.sup.th byte.  If all of the
eight types of write strategies (WS1 to WS8) are applicable, `1111 1111b` is written in the L.sup.th byte.  In the drawing, `0000 1111b` is written in the L.sup.th byte to indicate that four WS types WS1 to WS4 are applicable.
Moreover, recording layer information indicating the number of recording layer(s) existing within the corresponding disc is recorded in another specific area (M.sup.th byte) within the disc information, which is named `Number of Recording Layer`
field.  For instance, a value meaning the number of the recording layer(s) can be represented by a binary number in the same area having 1-byte allocated thereto.  In case that the recording layer is the single layer (one recoding layer) in FIG. 1, `0000
0001b` is written in the M.sup.th byte.  In case that the recording layer is the dual layer (two recording layers) in FIG. 2, `0000 0010b` is written in the M.sup.th byte.  In case that four recording layers exist, `0000 0100b` is written in the M.sup.th
Besides, parameters of a selected write strategy (WS) are written in another specific area (P.sup.th.about.111.sup.th bytes) within the disc information, which is named `Write Strategy (WS) parameters` field.
By writing the N.sup.th, L.sup.th, and M.sup.th byte informations recorded within the disc information by the same values in common to the entire disc informations, respectively, the record playback apparatus (FIG. 10) is facilitated to acquire
the informations of the writing speed applicable by the corresponding disc, the write strategy (WS) kind, and the number of the recording layers despite playing back any disc information.
Specifically, it may be able to record disc information per writing speed, per recording layer, and per write strategy (WS) type.  Yet, in such a case, the number of the recorded disc informations excessively increases.  Moreover, a disc
manufacturer should test the entire write strategy (WS) types and record the test results within the disc information, whereby it becomes a burden.
Therefore, in the embodiment according to the present invention, write strategies (WS) of which number (m) is smaller than that (n) of the maximum applicable write strategy types are recordable within disc information and a disc manufacturer
further enables to optionally record a specific one of a plurality of write strategies (WS), whereby disc manufacturer&#39;s convenience is secured as well as an efficient recording of disc information is enabled.
In FIG. 9A, recording is performed at 1.times.  speed (1.times.) using 1.sup.st and 2.sup.nd type write strategies WS1 and WS2, at 2.times.  speed (2.times.) using 2.sup.nd and 3.sup.rd type write strategies WS2 and WS3, or at 3.sup.rd writing
speed (3.times.) using 3.sup.rd and 4.sup.th type write strategies WS3 and WS4.
FIG. 9B shows another example of recording disc information according to the second embodiment of the present invention in FIG. 8.  Like FIG. 9A, three kinds of applicable writing speeds exist and `0000 0111b` is written in N.sup.th byte.  Four
applicable write strategy types exist and `0000 1111b` is written in L.sup.th byte.  And, two recording layers exist within a disc and `0000 0010b` is written in M.sup.th byte.
Specifically, in configuring disc information using one of a plurality of applicable write strategies (WS), at least one disc information is configured per the same writing speed and recording layer.  In doing so, the most preferentially provided
disc information is defined as preferred WS provided by a disc manufacturer and another disc information following the preferred WS is defined as alternative WS.
Namely, both disc information `00h` and disc information `01h` relate to 1.times.  speed (1.times.) and 1.sup.st recording layer (L0).  Yet, the WS1 type information 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.
And, disc information `04h`, disc information `05h`, and disc information `06h`relate to 2.times.  speed (2.times.) and 1.sup.st recording layer (L0).  Yet, the WS2 type information recorded in `04h` as preferentially provided disc information
becomes the preferred WS, and the WS1 type information recorded in `05h` and the WS3 type information recorded in `06h` as next provided ones become the alternative WSs, respectively.  Namely, they can be applied to at least three disc informations of
the same writing speed/recording layer.
Moreover, disc information `10h` relates to 3.sup.rd speed (3.sup.rd .times.) and 1.sup.st recording layer (L0) and disc information `11h` relates to 3.sup.rd speed (3.sup.rd .times.) and 2.sup.nd recording layer (L0).  In case that only one WS
type information is provided to the same writing speed/recording layer, the provided WS becomes the preferred WS.
Namely, when a disc manufacturer provides disc information within a disc according to the previously determined specification, an optical record playback apparatus (FIG. 10) reads out the disc information in a specific order (writing
speed.fwdarw.recording layer).  If a plurality of disc informations exist on the same writing speed/recording layer, the optical record playback apparatus (FIG. 10) recognizes the preferentially provided WS within the disc information as the preferred WS
and the next WS as the alternative WS additionally provided by a disc manufacturer, thereby enabling record playback using disc information efficiently.
The control unit 20 gives a record or playback command for a specific area, and the record playback unit 10 caries out the record/playback for the specific area according to the command of the control unit 20.  Specifically, the record playback
unit 10 includes an interface unit 12 performing communications with an external device, a pickup unit 11 directly recording data on the optical disc or playing back the data, a data processor 13 receiving a playback signal from the pickup unit 11 to
restore into a necessary signal value or modulating to deliver a signal to be recorded into a signal to be recorded on the optical disc, a servo unit 14 reading out a signal from the optical disc correctly or controlling the pickup unit 11 to record a
signal on the optical disc correctly, a memory 15 temporarily storing disc control information including disc control information, and a microcomputer 16 responsible for controlling the above-described elements within the record playback unit 10.
First of all, once an optical disc is loaded in the optical record playback apparatus, the entire disc management information within the disc is read out to be temporarily stored in the memory 15 of the record playback unit 10.  And, various
kinds of the disc management information are utilized for the record/playback of the optical disc.  Specifically, the management information stored in the memory 15 includes disc control information of the present invention.  Hence, the recording layer
information, writing speed information, and write strategy fitting the corresponding writing speed recorded within the disc information are read out to be stored in the memory.
If intending 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 record playback unit 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 intended recording layer within the optical disc from the management informations stored in the memory 15 and
then performs the writing command using the optimal write strategy by referring to the decided writing speed.
Specifically, in case that the recording is performed on the optical disc by the present invention, the disc information as management information is provided in a specific order and the microcomputer 16 recognizes which WS is the preferred WS of
the disc manufacturer in the same writing speed/recording layer.  Therefore, it is more facilitated to perform the recording on a specific recoding layer within an optical disc at a specific writing speed.
Accordingly, the present invention provides various methods of providing disc control information coping with higher writing speed in a high-density optical disc, thereby enabling to uniformly apply the standardized disc control information to
efficiently cope with the record/playback of the optical disc.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention.  Thus, it is intended that the present invention covers the modifications and variations of this invention provided
they come within the scope of the appended claims and their equivalents.
Method of recording data on a multi-layer recording medium, recording medium, and apparatus thereof, et al., Jin Yong Kim, Sang Woon Suh, Application number 11 723-805, Dynamic Information Storage Or Retrieval, recording medium, LG Electronics, optical disk, Patent Inventor, Patent Attorney, Patent Search, Patent Community, optical disc, English Español, Electronics
FOREIGN PRIORITY INFORMATIONThis application claims the benefit of the Korean Application No. 10-2003-0046420 filed on Jul. 9, 2003, Korean Application No. 10-2003-0063271 filed on Sep. 9, 2003, Korean Application No. 10-2003-0063591 filed on Sep. 15, 2003, and KoreanApplication No. 10-2003-0065628 filed on Sep. 22, 2003, which are hereby incorporated by reference.BACKGROUND OF THE INVENTION1. Field of the InventionThe present invention relates to recording media, and more particularly, to a method of recording disc control information on a recordable optical disc including at least one recording layer, in which writing speed information and per writingspeed write strategy information (write strategy parameters) are included within the recorded disc control information, and to method of recording data using the disc control information recorded in a specific area of the recordable optical disc.2. Discussion of the Related ArtA high density optical recording medium, known as HD-DVD, is widely used to record and store high-definition video data, large-amount program data, and high-quality audio data and so on. The Blu-ray disc represents next-generation HD-DVDtechnology. Technological specifications are now being established for the global standardization of the Blu-ray disc, including standards for the write once Blu-ray disc (BD-WO). Meanwhile, a rewritable Blu-ray disc, known as the 1.times.-speed BD-REand now being discussed, should be compatible with BD-RE discs expected to have higher writing speeds, i.e., the 2.times.-speed BD-RE and beyond. BD-WO specifications for high writing speed are also in progress. Efficient solutions for coping with thehigh writing speed of a high-density optical disc are Urgently needed, and the specifications established should ensure mutual compatibility.SUMMARY OF THE INVENTIONOne exemplary embodiment relates to a method for recording data on a recording medium having one or more recording layers. The method provides for r
Formalising Multi-layer Corpora Multi Layer Perceptron