AU2003303080A1 - Recording medium, method of configuring control information thereof, recording and/or reproducing method using the same, and apparatus thereof - Google Patents

Description

Recording Medium, Method of Configuring Control Information Thereof, Recording and/or Reproducing Method Using the Same, and Apparatus Thereof Technical Field The present invention relates to a method of recording control information on a recording medium, such as recordable optical disc having at least one recording layer, and more particularly, to a method in which record velocity information and write strategy parameters are included in the disc control information. Also, this invention relates to a method of recording or reproducing data cn or from the recording medium using the writing speed information Background Art 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 one. 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. are for the write-once Blu-.ray disc (BD-WO).

Meanwhile a rewritable Blu-ray disc, known as the ix-speed BD- RE and now being discussed, should be compatible with BD-RE discs expected to have higher writing speeds, the 2xspeed BD-RE. and beyond. BD-WO specifications for high recording velocity 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.

Disclosure of Invention Accordingly, the present invention is directed to an .optical disc control information, recording. method that substantially obviates one or more problems,. due to limitations and disadvantages of the related art.

An :object of the present invention is to provide a. method of recording disc control information as specified information corresponding to a plurality of -recording velocities, by which recording velocity information is included in the disc. control .information so that the recording and reproducing of an optical disc can be performed based on prerecorded disc information.

Another object of the present invention is to provide a data structure for configuring disc control information.

Another object of the present invention is to provide a method of recording, in a specific area of an optical disc, disc control information corresponding to a plurality of recording velocities, by which information for specific recording .velocities per recording layer is recorded in a specific sequence, .to provide mutual compatibility between like-based discs.

Another object of the present invention is to provide a recording and reproducing method and apparatus thereof, by which user data can be recorded on and reproduced. >frcm an optical disc using prerecorded disc control information.

Additional advantages, objects, and, features of the invention will be' set forth in part in the description which follows and in part wil1 .become apparent to those having ordinary skill in the art upon examination of the following or may be learned from. practice of the invention. The objectives .and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a data structure according to the present invention includes a recording speed information including a first information indicating a maximum recording soeed, a second information indicating a minimum recording soeed, a third information indicating a predetermined recording soeed different from the maximum or minimum recording speed, and a fourth information indicating a basic recording speed.

In another aspect of the present invention, in configuring disc control-information within a management area of an optical disc, a method of recording the disc control information of the optical disc includes the step of. recording a plurality of recording speed information and a plurality of write strategies respectively associated with corresponding recording speeds within .the disc control information wherein one of the.

recording speed information is a basic recoding speed information.

In. another aspect of the present invention, a .method of recording data on an optical recording medium includes the step of recording a speed information on a specific area of the optical recording medium, wherein the speed information comprises a first information indicating a maximum recording speed, a second information indicating a minimum recording speed, a third information indicating a predetermined recording speed 'different from the maximum or minimum recording speed, and a fourth information indicating a basic recording speed.

In another aspect of the present invention, a method of recording/reproducing data on/from an optical recording medium includes the steps of reading a .speed information from a specific area of the optical recording medium wherein the speed information comprises a first information indicating.a maximum recording speed, a' second. information indicating a minimum recording speed, a third information indicating a predetermined recording speed different from the maximum or minimum recording speed, and a fourth information indicating a basic recording speed and recording data on a main data area of the optical recording medium based on the read.speed information.

In another aspect of the present invention, a recording.medium .having a recording speed .information is .characterized in that the recording speed information.comprises a first information indicating a maximum recording speed, a second information indicating a minimum recording speed, a third information indicating a predetermined recording speed different from the maximum or minimum recording speed, and a fourth information indicating a basic recording speed.

In another aspect of the present invention, an optical disc includes at least one recording layer provided, with a recordable area and a recording-disabled or prerecorded area, wherein disc control information is separately recorded.within the prerecorded area per the recording layer and wherein a plurality of recording speed information and a plurality. of write strategies associated with corresponding recording speeds are recorded within the disc control information, and wherein .one of the recording speed information is a basic recoding speed information.

In. another aspect of the present invention, an optical disc recording: method includes the steps of if an optical disc having at least one recording layer is loaded, reading disc control information written within a management area of the optical disc and reading to store a plurality of recording speed information and write strategies respectively fitting corresponding recording speeds recorded within a predetermined area -of the disc control information each, deciding the recording speed to be applied to each section of .the optical disc by. referring to a. plurality of .the stored speed information and the write strategies, and performing a recording at the decided recording speed.

In another -aspect of the present invention, an optical disc record playback apparatus includes a control unit delivering-a recording command and a record playback unit receiving the recording command, the record playback unit performing a recording. in. a manner of reading disc control information recorded within a management area of an optical disc, deciding a recording speed for performing the recording command. on a specific area.by reading a maximum recording speed information, a minimum recording speed information, a basic recording speed information, a predetermined speed information different from the maximum or minimum recording speed. information at least, and a write strategy fitting.the corresponding recording speed, and performing the recording using the write strategy fitting the decided recording speed.

It. is to be understood that both the foregoing general.

description and the following detailed description of the present invention are exemplary and explanatory and are iintended to provide further explanation of the invention as claimed.

Brief Description of Drawings The accompanying drawings, which are included to. provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the descriotion serve to explain the principle of the invention.

In the. drawings: FIG. 1 is a diagram of a single-layer disc applicable to the present invention; FIG. 2 is a diagram of a dual-layer disc applicable to the present invention; FIG. 3 is a diagram of a management area where disc control information of the present invention is recorded, in which a format of recording the disc information in a corresponding area is schematically shown; SFIGS.- 4A to 4C are diagrams, of disc information recorded according to a first embodiment of the present invention; FIGS. 5A and 5B are diagrams of- a disc recording method according to the first embodiment of the present invention; FIGS. 6A to 6C are diagrams of recording disc information according to a second embodiment of the present invention; FIGS. 7A to 7D are diagrams of recording disc information according to a third embodiment of the present invention; and FIG. 8 is a block diagram of an optical disc recording and reproducing apparatus using disc control information according to the present invention.

Best Mode for Carrying Out the 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.

A Blu-ray disc is taken as .an example of an optical disc according to the present invention. Yet, the concept of the present invention, characterized in an optical disc having its disc control information recorded thereon, is applicable to DVD-RM',: DVD-RW, DVD+RW, DVD-R, DVD+R, and similar such discs.

Although the terminology used herein is well known for the most part, some terms have been chosen by:the applicant, such that the present invention should be understood with the intended meanings of the terminology as used by the applicant. For example, the "disc control information" of a disc is recorded in a.specified area, a recordable area of the disc or a orerecorded area (sometimes known as an .embossedareamanufacturer, in which manufacturer data is recorded and where no further recording is possible), and includes information necessary for the playback of a recorded disc.

Disc control information is called "disc information" or "DI" in. relation to Blu-ray disc technology but is typically referred to as "physical format information" for DVD-RAM, DVD- RW, DVD+RW, DVD-R, and DVD+R discs. Hence, it should be apparent that the technical background of the present invention is equally applicable to physical format information.

Moreover, the disc, information according to the present invention is recorded as an unspecified -unit of information, which. may. be counted, for example, as a first or second information.

FIGS. 1 and 2 illustrate the structure of optical. discs according to the present invention, in which any recordable optical disc may be applicable to the present invention. The recordable disc may.be, for example, a rewritable optical disc or a write-once optical disc.

Referring to FIG. 1, illustrating an .optical disc having .one recording layer, 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. In the inner circumference area, a pre-recorded area and a rewritable (or write-once) area are provided separately. In BD-RE and BD-WO technology, the pre-recorded area is called the PIC area, where permanent information and control data is recorded, and disc information is recorded in the PIC area. A data area is made up of a user data area where user data is recorded and inner and outer spare- areas ISA and OSA, which are used in the reolacement of the data of a defective area. In the case of a BD-WQ. disc, .a temporary defect management area (TDMA) is orovided for recording information of a defect and for general management. The TDMA is unnecessary in the case of. BD-RE discs, which have a corresponding area designated as reserved.

The present invention intends to provide a method of recording disc information (DI) as disc control. information required for recording and/or reproducing of a disc in a pre-recorded or recordable are. It is apparent that a recording method in the Sre-record area is differently applied to each kind of disc.

In the case of BD-RE and BD-WO discs, the pre-recorded area. is the PIC area recorded using a bi-phased high-frequency modulated. signal reproduced according to a specific playback method, to acquire the disc information.

FIG. 2 illustrates an optical disc having dual recording layers, in which an inner circumference area of the disc has a lead-in of a first recording layer (Layer 0) corresponding to a leadout of a second recording layer (Layer In this case, one PI.C area is provided in each of the lead-in and lead-out areas, and the same disc information is recorded in each PIC area.

FIG. 3 illustrates a PIC area formatted according to the present invention. In configuring the disc information of the PIC area of a BD-RE or BD-WO disc, the minimum recording unit is one cluster, 544 clusters constitute one fragment as one upper record unit, and five fragments make up the PIC area.

Disc .information is recorded in a front head cluster of a first fragment IFO. The disc .information is plurally recorded per recording layer and recording velocity permitted by the corresponding optical disc. One disc information includes 112.

btes, sometimes referred to as a DI frame. To cope with a loss of disc information, the same contents of the disc information are repeatedly. recorded in each front head cluster .of the :remainder of the fragments.

Information representing the corresponding .recording layer, information representing recording velocity, and write strategy information corresponding to the recording velocity are included in each disc information. Such information is utilized" in recording and reproducing the optical disc, to provide optimal recording power per recording layer and per recording velocity.

The disc.information of the present invention is characterized in providing specific recording velocity information supported by the disc.and associated write strategy information, and.more specifically,, in providing specific recording velocity supported for each recording layer and. associated write strategy information via a. specified method for discs having a plurality of recording layers.

The, specific configuration of the disc information is for a Blu-rav disc, which may differ from the configuration, of a DVDbased disc. Specifically, the. recording DI volume for. a Blu-ray disc is 112 bytes or equivalent. By formulating the disc. information of the same recording layer as one information, without repeating any common .information,, the write strategy configuration may differ per recording velocity.

I.n addition to.a method of recording specific parameters.of the write strategy, a medium .property of an optical disc is generally modified by applying .a laser beam to a recording layer thereof via a pickup to perform recording. To do so, the laser beam's signal strength (recording power) 'and duration should be determined. Such information associated with recording is generally referred to as write strategy (WS) for achieving a specific "write strategy." FIGS. 4A-4C and 5A 5B illustrate a first embodiment of the present invention of recording disc control information, in which various recording velocities to cope with high speed are grouped into one recording velocity group to be recorded.

The first embodiment of the present invention relates to a recording method of disc information coping with high speed, a method of.recording data on an optical disc, and the like, and more particularly, to an advantageous method in coping with a constant angular velocity (CAV) system applicable to a highspeed disc. The present invention is not limited, however, to a. CAV system.

In the CAV system, a disc is rotated at a constant speed such that the disc's inner and outer circumferences each have a rotational velocity corresponding to the length of the applied radius. For a Blu-ray disc, the velocity of the .outer circumference is about 2.4 times greater than that of the inner circumference. Accordingly, if, for example, the recording on the inner circumference using a CAV system is performed at 1x-speed or 4x-speed, the outer circumference recording has to be performed at about 2.4x-speed or 9.6x-speed, respectively, and conversely, a 6x-speed recording on the outer circumference means that the inner circumference recording has to be performed.at about 2.5x-speed. In other words, adoption of the CAV system requires a velocity differential between the disc's inner and outer circumferences, so that an optimal recording velocity and write strategy must be selected for recording according to the applicable disc location. Moreover, such information should be provided as specified disc information to.

utilize the optimal recording velocity and write strategy (WS) in a corresponding system.

FIG. 4A shows one embodiment of recording disc information by an optical disc control according to the present invention, in which a disc information structure is schematically illustrated.

Referring to FIG. 4A, each disc information sequence is determined by a sequence number and is .recorded using.one byte.

For instance, the information is recorded in a fifth byte the "DI frame sequence number in DI block," which can be represented as ooh, 01h, 02h, 03h, 04h, 05h, 06h, or 07h) of the .disc information, where a fifth byte of. OOh or 07h indicates a first or eighth disc information, respectively.

In another meaning, the byte 5 th byte). deciding the sequence of the disc information can be defined to .mean not.

only the sequence but also an applicable recording velocity in a specific recording layer. For instance, '00h' means Ix speed disc information of a first recording layer, '0lh' means Ilx speed disc information of a second recording layer, .and the like.

Moreover, in a specific area within the disc information, recording velocity information designated by the corresponding disc information and write strategy (WS) coping with the corresponding recording velocity are written in a previously promised specific- location. For instance, the recording velocity information of the corresponding disc information is written.in N h-(N+4)th bytes, and the write strategy. (WSz). coping with the corresponding recording velocity. is written, in M'h-l 11 1 th bytes.

SSpecifically, the present, invention is characterized in providing disc information coping with high recording velocity, the recording velocity information and write strategy. are written for each of a plurality of recording velocity information, namely, an .optimal recording velocity Vnom, a maximum recording velocity Vmax, a minimum. recording velocity Vmin, and an intermediate recording velocity Vint.

At optimal recording velocity, the basic recording. speed information is written, and a basic recording speed generally starts at 2x-speed in a high-speed disc. As an applicable recording speed.increases, so does the basic recording speed.

At maximum recording velocity, information associated with maximum recording velocity applicable by a corresponding disc is written. At minimum recording velocity, information associated with recording speed found by dividing the maximum recording velocity applicable by the corresponding disc by is written. At intermediate recording velocity, information associated with recording speed found by multiplying the minimum recording velocity by is written.

13 .A relation of determining recording velocity values of the maximum, minimum, and intermediate recording velocities is decided for convenience of explanation by considerina a radius ratio between inner and outer circumferences of BD applicable to the present invention. It is apparent that such a relation 'can be variably applied to. other kinds of discs and that the recording velocity values can be set to different values according to disc characteristics despite the same BD.

Relating to the optimal recording velocity (2x speed), the same information is preferably recorded in each disc Sinformation. Preferably, the. maximum, minimum, and intermediate. recording velocities are differently determined according to the maximum recording velocity value applicable by the corresponding disc information.

Moreover, it is able to set up the intermediate recording velocities plurally. The present invention is characterized in having at least one intermediate recording velocity. Hence, at least four recording velocity information are included in one disc information. The more :the recording velocity information exist, the more advantageous it becomes for the system operation. Hence, by utilizing a. recordable area. within disc information to the maximum, many intermediate recording .velocity iiformation are preferably provided thereto.

FIG. .4B' shows a specific recording method for disc information having a plurality of per recording velocity information according to the present invention like FIG. 4A, in which disc :information -is written while maintaining compatibility with Ixspeed BD-RE disc information under discussion and in which there exists one intermediate .recording velocity information for example.

Three kinds of recording velocities such as optimal recording velocity (Vnom), maximum recording velocity (Vmax), and minimum recording velocity (Vmin) are written in 3 2 nd- 3 5 th bytes within disc information according, to a predetermined definition. Write power information as write strategy (WS) for each of the three kinds of recording velocities is recorded in 4a8"-7!" bytes. A start time of a write pulse as another write strategy (WS) coping with each of the three kinds of recording velocities is recorded in 7 6 h- 8 4 t~ bytes. A start time of an erase pulse as another write strategy (WS) coping with each of the three kinds of recording velocities is recorded in 8 9 h.- 9 7 h bytes.

.n addition to the basic three kinds of recording velocities V.nom, Vmax, and Vmin, the present invention further records at least one information associated with the. intermediate recording -velocity Vint, which is recorded using a reserved area within disc information. For instance, the intermediate recording velocity is recorded in 1 9 th byte according, to a :predetermined definition, write power information is .recorded .as. write strategy (WS) coping with the intermediate, recording velocity in total 8-bytes .of 20 l-23 d bytes and 4 4 t h 4 7 t h bytes, .a start time of a write pulse as. another write strategy (WS) coping with the intermediate recording velocity is recorded in 99thh-01 s c bytes, and a start time of an erase pulse as another write strategy (WS) coping with, the intermediate recording velocity is recorded in 102~-104 h bytes.

As explained in the foregoing- description, if a plurality of intermediate recording: velocities are intended to be recorded, information associated with another intermediate recording velocity can be recorded in a reserved area within disc information as well.

iO FIG. 4C schematically shows disc information recorded. in case of .recording the disc information of FIG. 4A; and more particularly, in case- of a dual layer .having two recordihg layers. The same principle can be applied to a single layer having one recording layer.

For ins-tance, when an optical. disc needs three .different recording velocity information per recording layer, six disc information corresponding to each recording velocity are required. Each disc information allocates to record a sequence number,. recording velocity information corresponding. to the sequence number, and. a write strategy (WS) in a predetermined area.

For instance, if recording velocities to be represented are Ixspeed, 2x-speed, and 6x-speed, first, second, and third disc .information mean the disc information for the first recording layer. The i st disc information is Ix-speed disc information of the 1 s t recording layer and has a sequence number of '00h'. The -corresponding recording velocity and write strategy are recorded in a previously promised location, whereby the recording. velocity information is recorded in bytes and. the write strategy is recorded in Mh"-lll th bytes.

The 2 nd disc information is 2x speed disc information of .the 1".

recording layer and has a sequence number of The corresponding recording velocity and write strategy are recorded in a previously promised -location like the 1 St disc information. The third disc information is 6x speed. disc .information of the 1' recording layer .and .has a sequence number of '02h'. The corresponding recording velocity and write strategy are recorded in .a previously promised location like the1t or 2 d .disc information.

Meanwhile, 4 th to 6 t h disc information mean disc information for S2nd recording layer.. The 4 disc information is lx speed disc information of the 2 nd recording:, layer and has a sequence number of '03h'. The 5 h disc information is 2x speed disc information of the 2 nd recording .layer and has. a sequence number of '04h' The 6 th disc. information is 6x speed disc information of the 2 nd recording layer and has a sequence number of '05h'. The corresponding recording velocity and -h write strategy of each of the 4" to 6 th disc information are recorded in the same location.

The first embodiment of the present.invention shown in FIGS. 4A to 4C is described by taking an example of recording a plurality of. the recording velocity information and per recording velocity write strategies (WS) within one. disc information. If necessary, one write strategy associated -with specific recording velocity information, may be recorded in one disc information,.and the remainder recorded in:another disc information.

For instance, in case that four kinds of recording .velocity..

information are required, the disc information are needed four times more than those of the .above-described embodiment of the present invention. Yet, the PIC area, as shown in FIG. 3, is San area sufficient for recording a multitude of 112-bytes disc information therein so that. sufficiently large amount of disc' information can be recorded therein if necessary. Hence, if one write strategy is recorded within the disc .information, it. is advantageous in allocating: more areas for recording intermediate recording velocity therein.

On the contrary, it is possible to record information commonly recorded in each. disc information as common information once and to change to record the per recording velocity write strategies only.

FIG. 5A and FIG. 5B are diagrams of a recording method of performing a recording on. an optical disc according to the first embodiment of the present invention. FIG. 5A relates to a case of using. one intermediate recording velocity, and FIG.

5B shows an example of using at least two intermediate recording velocities.

Namely, once an optical disc is loaded in. an optical record/playback unit, write strategies respectively associated wt.ith maximum recording velocity (Vmax), minimum recording velocity.(Vmin), and intermediate recording velocity (Vint) are read out as disc control information within the optical disc.

A recordable area between an inner circumference and .an outer circumference is virtually divided into three sections. The .maximum recording velocity. (Vmax), minimum recording velocity (Vmin), and intermediate recording velocity (Vint) are applied to an outer circumference area, an intermediate area, and an inner circumference area, respecively, .to perform a recording thereon. This means that the recording is performed by applying an appropriate recording velocity and write strategy (WS) associated with the corresponding recording velocity to a specific area, where the recording will be performed, to adjust write power, write pulse timing, and the like.

For instance, if a maximum recording velocity applicable by a disc is 6x-speed, disc information associated with 6x speed is read out. In case that the maximum recording velocity (Vmax) is 6x-speed, 2.5x-speed for a minimum recording velocity (Vmax/2.4) and 4.25x speed for an intermediate recording velocity (1.7Vmin) are recorded within the. disc information as well as 'write strategies for the respective recording velocities. A record/playback unit previously confirms. the recording velocity and write strategy which. will be applied.to a specific area where a recording will be performed, thereby enabling to quickly cope with the write strategy (WS) in performing the recording on the corresponding area and to reduce probability of error occurrence using the optimal recording velocity.

FIG. 5B schematically shows a method of performing a recording on an optical disc in case that a plurality of intermediate recording .velocities are recorded within disc information. A recordable area of an optical disc is virtually divided into a plurality of sections as many as a number of recording velocities within disc information. except Vnom. Maximum recording velocity (Vmax) and minimum recording velocity (Vmin) are applied to an outer circumference area and an inner circumference area, respectively, to perform a recording thereon. An intermediate area of the disc is divided into areas as many as the number of the -set intermediate recording velocities to apply the intermediate recording velocities Vintl-Vint-n thereto, respectively. Thus, the corresponding recording is performed on the divided areas. Hence, an optimal recording velocity to the. corresponding section is determined, Swhereby the recording is enabled using the determined write scrategy (WS) per the corresponding decided recording velocity.

FIGs.. 6A to. 6C illustrate a second embodiment of the present inventioh of recording disc control information,. in. which recording velocity information indicating a corresponding.

recording velocity and a write strategy corresponding to the recording velocity are recorded within each disc information to cope with high speed.

FIG..6A shows one example of recording disc information of an optical disc according to a third embodiment of the present invention, in which a disc information structure is schematically illustrated.

Referring to FIG. 6A, a sequence of each disc information is decided by a sequence number, and the corresponding sequence is by 1-byte. For instance, the corresponding information is recorded in 5 t h byte within the disc information, which is named 'DI frame sequence number in DI block' field and is briefly represented by '00h, 0Oh, Namely, the information of the 5 t h byte is defined in a following manner.

First of all, if the information of the 5 t h byte is 'OOh', '00h' means 1 s t disc information. '07h' means 8 t h disc information.

In a specific area within the disc information, each recording velocity information allowed by a disc is. represented by a specific bit to be recorded in a previously promised specific location' within the disc information. For instance, if a .corresponding disc 'needs four. different recording velocity information per recording layer, 4-bits are allocated to one recording velocity each, recording velocity information for the first recording layer (Layer is recorded in Nh and (N+l)th .bytes within the disc information,. and recording velocity .information for .2nd recording layer Layerl is recorded in MI h and (M+1) t h bytes within the disc information. If the disc has a single layer, the Mt h and bytes are set to 'zero' value. If at least four kinds of different recording velocity information are required, bytes such as N'h byte, t byte, S (N+2)th byte, and the like are additionally allocated to use.

Therefore, the recording velocity corresponding to its sequence number, as .shown in FIG.. 6A, is recorded in a previously promised specific location,.. whereby it is facilitated to confirm the recording velocity information possessed by the corresponding disc information. Moreover, the remaining bytes, 4 4-h~lith bytes, are utilized to record write. power, write parameters, and the like in detail.

FIG. 6B schematically shows disc information recorded n. case of representing.the recording velocity information like FIG. 6A, and more particularly, in case of. a single layer. If an optical Sdisc' requires four kinds of different recording velocity information,- four disc information' corresponding to each recording velocity are needed. Each of the disc information is recorded by allocating 4-bits to :a sequence number and 4-bits 'to recording velocity corresponding to the sequence number.

For instance, if recording velocities to be represented are lx speed, 2x speed, 4x speed, and 8x speed, respectively, 1 s disc nformnation has a sequence number corresponding to 100h, 0. represent a corresponding .recording velocity by '000Th' i ndicatiing ix speed, 2 disc inform~ation has a. sequence. number.

corresponding to 'O1l to represent a correspondingrcodn velocity by '0i0b' indi cating 2x speed, 3 d disc information h~as a sequence number corresponding to '02h' to repre-sent a correspond ing. recordin~g velocity by 'Olo0b' indicating 4x speed, and 4th disc information has a sequen~ce number correspon.di4ng to 1.03h' to represent *a corresponding recording velocizJ-y by 'lOQdb' nid n ax. speed. 7 n doing so, each recording vIelocity is represented by binary information. Hence, if 4--bits ea=ch is allocated, a maximum -applicable recording velocity repesetedby'l111b') wlbe15x speed. If the maximnum aPplicable recording velocity exceeds, 16x speed, at least hits each should be allocated.

Since the single layer is shown in FIG. GB, Mth and 1)th bytes rep'resenting rcdigvelocity information for 2 nd recording. layer Layerkl are *set 'to 'zero' to. be handled as unused information.

TIG 6C schematically~ shows disc information recorded in case o f represent ing the recording velocity information like FIG. GA, and more. pa-rt icularly, in case of a dual layer. If an oiptical' 29 disc requires four kinds of different recording velocity information, total eight.disc information corresponding-to each recording velocity are needed. Each of the disc information is recorded.by allocating 4-bits to a sequence number and 4-bits to recording velocity corresponding to the sequence number.

For instance, if recording velocities to be represented are Ix speed, 2x speed, 4x speed, and 8x .speed, respectively, 1 disc information has a sequence number corresponding to '00h'. to represent a corresponding recording velocity by '0001b' indicating Ix speed, 2"6 disc information has.a sequence number corresponding to '01h' to represent a corresponding recording velocity.by '0010b' indicating 2x speed, 3rd disc information has a sequence number corresponding to '02h' to represent a corresponding recording velocity by '0100b' indicating 4x speed, .and 4 t h disc information has a sequence number corresponding to '.03h' to represent a corresponding recording velocity by '1000b' indicating 8x speed. The i st to 4 th disc information are.

information for the 1i recording layer (Layero) and are .recorded in Nth and bytes of disc information, and 4bits represent each recording velocity by binary information.

Tikewise, recording velocity information can be represented for 2 nd recording .layer in the same manner., which is recorded in M" and bytes. Namely, 5 th disc information has a sequence number corresponding to '04h' to represent a corresponding recording velocity by '0001b' indicating lx speed, 6 t disc information has a sequence number corresponding to '05h' to represent a corresponding recording velocity by '0010b' indicating 2x speed, 7 t disc information has a sequence number corresponding to '06h' to represent a corresponding recording.velocity by '0100b' indicating 4x speed, and 8 t h disc information.has a sequence number corresponding to '07h' to represent a corresponding recording velocity by '1000b' indicating 8x speed.

In the second embodiment, write strategy for write power, write parameters, and the like fitting each recording velocity..is recorded in a rest area within the disc information as well as the recording velocity information. Hence, within one disc information, a sequence number of the corresponding disc information, recording velocity information represented by the corresponding disc information, write strategy (WS) coping with the corresponding recording velocity, and the like are recorded respectively.

Besides, in representing the recording velocity information like the second embodiment, byte information is previously defined as a specific recording velocity so that recording. velocity information is recorded in N t h

M

th and h bytes to confirm it.

For instance, it is previously defined that '00h' of 5 t byte.

information means 'Ix speed disc information of 1 t recording layer' and that '07h' of 5 h byte information means 'Bx speed disc information of 2 nd recording layer'. Four bits are allocated to each of the N h, Mh, and bytes so that an accurate recording velocity value is recorded as '0001b' .(lx speed) or 'Ol00b' (8x speed).. Thus, it is reconfirmed that the corresponding disc information is Ix- or 8x-speed.

FIGS. 7A to 7D are diagrams of recording disc information S according to a third embodiment of the present invention, in which applicable recording speed information. is recorded to cope-with high speed.

In order:to acquire disc information associated with a specific writing speed. of an intended specific recording layer from a :plurality of existing disc information, the entire disc 'informatibn should be read to take a lot of time. For instance, if there are four recording layers and eight writing speed.

applicable per recording layer, total thirty-two disc information are needed. A record/playback unit should search the entire disc information amounting to thirty-two whenever a value of the disc information for the specific recording layer and writing speed is needed. Hence, the present invention is characterized in recording 'disc-applicable writing speed information' and 'recording layer information existing in a disc' within disc information to enable a disc information search by a specified method using the recorded information.

:Namely, .the 'disc-applicable writing. speed information'. and 'recording layer information existing in a disc' are.

Sidentically recorded within each disc information in common and a sequence of a plurality of disc information is decided using these information, thereby facilitating to acquire .disc information related to.the specific recording layer and writing speed to -be searched, Moreover, one write strategy (WS) is recorded within. each disc information and identification information for identifying a kind or type of the corresponding write strategy..(WS) is separately recorded, whereby a record playback apparatus (FIG.

8) is facilitated to use the write strategy Moreover, by selecting to record one write strategy (WS) for a -specific writing speed and a specific recording layer in disc information, a disc manufacturer can be provided with convenience.

A method of recording disc information according to a third embodiment of the present invention is explained by referring o 'FIGs..7A to 7D as follows.

FIG. 7A shows a schematic structure of disc information for explaining a method of recording disc information according to a third.embodiment of the present invention.

Referring to FIG. 7A, 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 5 h S byte within disc information, is named 'DI frame sequence number in DI block' field, and is briefly represented by '00h, Olh, 02h, Namely, if the information of the 5th byte is 'OOh', it means i disc information. If the information of the 5 t h byte is '07h', it means 8 th disc infQrmation. A meaning of the sequence of the 5 th byte will be decided by Nh and Lh bytes that will be explained later.

Writing speed information applicable by a corresponding disc- is recorded in a specific area. (Nt 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 'Ob' in entire bits or that the corresponding writing speed is applicable (supported) if the bit value is 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.

For instance, if Ix speed is applicable by a corresponding disc only, '0000 0001' is written in Nh. byte. If all of the eight kinds of writing speeds are applicable,. '11li 1111' is written in the N"h byte.

In the above explanation, lx. and 2x 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 et 3 r d 4 t h 5 t h .6 h 7 th and 8 t h writing: speeds 3 rd X, 4 h 5 t h X, 6 t h X, 7 X 8 t h X) to 5x, 6x, 8x, 12x, 14x, and 16x speeds, respectively.

Hence, if the corresponding disc allows the writing speeds up to the. 4 h writing speed, it will be written as 'Writing speed flag 0000 111lb' Yet, if the .corresponding disc allows not the 3 r d writing speed but the 4 th writing speed, 'Writing speed flag 0000 1011b' is not allowed. Namely, in the 'Writing.speed flag' field, if upper bits are set to the corresponding lower bits should be set to Hence, it means that lower bits are not set to 'Ob' despite 'lb' of upper bits.

Meanwhile, recording layer ihformation indicating the number of recording layer(s) existing within the corresponding disc is recorded in another specific area (L'h byte) within the. disc i:nformation, 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 Lth 'byte. In case that the recording layer is the dual layer in FIG. 2, '0000 0010' is written in the L'h byte. In case that four recording layers exist, '0000 0100' is written in the L h byte.

Since limitation is put on the number of the% currently considered recording layer(s), which is currently two recording layers, within the L byte are enough to represent total fifteen recording layers (in case of In such a case, it is apparent that other valid information can be written in the rest area (4-bits) of the L 1 byte.

Moreover, identification information for identifying a kind of write strategy (WS) recorded in Ph-ll1" bytes is written in another specific area (Mt h byte) withir 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 write strategy types by a disc manufacturer.. Hence, if the corresponding disc information is a first type write -strategy .WS-1, 0:000 0001' is written in :the M byte. .If the corresponding disc information is a :second.type write strategy -WS-2, '0000 0010' is written in the byte. And, substantial Swrite strategy (WS) is recorded in P:-lllt h bytes. :Yet, the substantial write strategy will be recoded as a value interoperating with the.decided write strategy (WS) type in the

M.

h fbyte. The write strategy (WS) .type via the byte is optionally recordable in every disc information. And, it is also possible to apply one specified write strategy (WS) type in Ix speed disc information, which is expected to be supported by every record playback apparatus (FIG. in a mandatory manner.

And; the write strategy (WS) can be recorded in various ways.

As a disc becomes highly densified and has higher speed, a writing speed, disc RPM) as well as medium properties of 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 write pulse smaller by than a recording mark size formed on a recording layer medium, which may be.called WS'. Sedondly, there is a system having a write pulse having a size amounting -to a half of the recording mark size which may be called 'n/2 WS'.

Besides, new write strategies (WS) keep being developed.

Regarding the different kinds .or types .of write strategies (WS), when there exist the various write strategy (WS) types exist as.

parameters applied to the write, strategies (WS) differ from each. other, a- di'sc manufacturer tests write power according to the write strategy (WS) recorded in.the selected Mt- byte and then records a result of the test.as write strategy (WS) in the S th-.ll h bytes within the disc.information., From the above-recorded 'writing speed information' of the Nth byte and the 'recording layer information' of the Leh byte, the record playback apparatus (FIG. 8) recognizes how many disc information exist within the corresponding disc.

Namely, the number of the existing disc information 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 type and number of the write strategy (WS) may not be taken into consideration in deciding the number of disc information.

The. above-decided information about the number of total disc information can be recorded in a specific area 4 th byte or the like) (not shown in the drawing) within the disc information as well.

Hence,. it. is able to program a plurality of the above-decided disc information such that -the sequence (which: is written in the 5 h byte as mentioned in the foregoing description) of the disc information is decided by the sequence numbers and such that each of the disc information '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 Nt" byte is '0000 1111' and that two recording layers exist within the disc if: the L th byte is '0000 0010', total eight disc information are needed so that the sequence will be '00h-07h'. And, it is previously decided that disc information of '00h', 'olh', '02h', '03h', '04h', '05h' '06h', and '07.h' relate to 'lx speed, .1 recording layer', '2x speed, 2 nd recording layer', '2x speed, i st recording layer', '2x speed, 2 n d recording layer' 3 rd writing speed, 1 st recording layer', '3 r d writing speed, 2 nd recording layer', '4 t h writing speed, 1" recording layer', and '4"h writing speed, 2 n d recording 'layer', respectively.

In the above-explained example, the writing speed is preferentially taken into consideration. Yet, it. is .apparent that the recording layer can be pref-erentially taken. into consideration.

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. is facilitated to check which disc information is related to the specific target writing speed and recording layer from 'writing, speed information' of the Neh byte and 'recording layer information' of .the L.

G h byte commonly recorded within the respective .disc information instead of playing back to check the entire'disc information.

FIG. 7B shows an example of extending the third embodiment of the present invention in FIG. 7A. In case that writing speeds applicable by a disc exceed eight kinds, the N W h byte ('Writing speed flag' field) in FIG. 7A is extended to indicate presence or non-presence of applicability of i-8r writing speeds by a flag in N1 i h byte ('Writing speed flagl' field), and another byte is allocated to display presence or non-presence of applicability of 9 writing speeds by a flag ih N2 byte.

Contents written in the rest bytes are equivalent to those of the. third embodiment of the present invention in FIG. 7A, thereby being skipped in the following description.

FIG. 7C shows an example of recording disc information by the third embodiment of the present invention in FIG. 7A. It can be known that there are two (lX, 2X) applicable writing .speeds .from N byte ('0000 OOl0b') commonly recorded in the entire disc information and that two recording layers exist within a disc from L t h byte ('0000 0010b').

.Hence, in the example of FIG. 7C, total four disc information S(two .recording. layers two writing speeds) exist and a sequence of the disc information becomes '00h' (1X,LO) 1 'Oh' (IX,L1) '02h' (2XLO) '03h' (2X, L This is a specified content according to a predetermined sequence and, as mentioned in the foregoing description, can be rendered into a different sequence by a specification.

An intrinsic write strategy (WS) .is recorded in other bytes within each disc information as well as in N h and.L'h bytes.

Specifically, information of a type of write strategy (WS) twritten in P -ll1' bytes within the corresponding disc information is recorded in .M byte. Namely, information :ritten in .the Mth byte and the P.h-l!th" bytes can differ in each.disc information.

In the example in FIG. 7C, 'OOh' (1X,LO) and 'Olh' (IX,Ll) relate to. the.application of a first type write strategy (WS-l) and '02h'. (2X,LO) and '03h' (2X,L1) relate to the application of a second type write strategy (WS-2).

FIG. 7D shows another example of recording disc information according to the third embodiment of the present- invention in FIG. .7A. It can be known that there are eight. (lX, 16X) applicable writing speeds from byte ('1111 illlb') commonly recorded in the entire disc information and that four recording layers exist within a disc from. L' byte ('0000 0100b).:. Hence, in the another example of FIG. 7D, total thirty-two disc 42 information (four recording layers eight wjriting speeds) exist arid a sequence of the disc information -becomes. '00h' (1X,LO) Oil (1X,LI) 02h' IX, L2) '04h' (2X,LO) '31hi (16X,L4/) An intrinsic write str~kegy (WS) is recorded in other bytes Within each disc information as well as in N th and L t byt.es.

Specifi-ally iomation of a type of a write strategy NWs) written in P th- 1 1 th byt es within the corresponding disc in-formation .is recorded in Mth byte. I-amely, informnation written in the Mhbyte And the -t~ 1 bytes can differ in each disc information.

in the anor-her example of FIG. 7D, if a record playback unit -(PIG. 8/1 intends to search disc information related to 2x speed (2X*,LoY of a first recording layer to perform 'a recording by apilying a write strategy (WS) within the correspond ing. disc information, it can be known from ~e i f r a i n i h and Lth bytes commonly recorded in the entire disc inf ormat ion that -total thirty-two disc informati*on. (four recording 'layers* eight writing speeds) exist in the corresponding .isc according to the- sequence of the disc information such. as 'OOh' (lX,LO).

'0th' (1X,Ll-) -4 102h' (lX,L2) 031h' (1X,L4) 1> 04h' (2X, O) 4~ 4. -A31h' (16X, L4.), Hence, the record playback apparatus (FIG. 8) enables to recognize that the disc information related to the 2x speed (2X,LQ) of the first recording layer to be searched is '04h' and that the corresponding disc information is recorded as the first type write strategy (WS-1_ from the write strategy (WS) type identification information ('0000 0002b') recorded in the Mt byte within the corresponding information (04h'), thereby reading out parameter values of the first type write strategy (WS-1) via the P' -llh bytes to utilize in the recording.

Likewise, .if intending to search disc information related to 16x speed .(16X,L3) of a fourth recording layer to oerform recording by applying a write .strategy (WS) within the corresponding disc information, the record playback unit (FIG.

8) recognizes that the corresponding disc information is '31h' via the same process and that the write strategy type (WS) is the second type thereby enabling to .utilize them in the recording.

Therefore, if a host or a control unit in Fig. 8) intends to perform a recording on a specific recording layer at a specific writing speed, the record playback apparatus .(FIG. 8) is facilitated to search.the corresponding disc information, thereby enabling to confirm the write strategy (WS) recorded within the corresponding disc information.

For reference,. the information of the first and third embodiments can be recorded within the disc information (DI) together or.within separate disc control information (not shown in the drawing), respectively. In this case, the applicable speed information disclosed in the third embodiment may have a priority. This is to decide by the information disclosed in the third embodiment whether a corresponding specific writing .speed is applicable because a portion of maximum writing speed, mnimum writing speed, nominal writing speed, and other writing speed information may not be substantially applicable.

FIG. 8. illustrates an optical disc recording- and reproducing apparatus using disc. control information according to the present invention. The recording, and reproducing: apparatus comprises a record/playback unit 10 for recording data on and reproducing data from an optical disc and a controller 20 for controlling the record/playback unit 10. The controller generates a record or playback command for a specific area, and the record/playback unit 10 caries out the record/playback function for the specific area accordingly. The record/playback unit 10 includes an interface 12 for communicating with an external device, the controller (or host); a pickup 11 for performing read and write operations with respect to the optical disc; a data .processor 13 for modulating the pickup's input signal for.performing a recording operation and for demodulating the pickup's output signal for performing a reproduction operation; a servo 14 for controlling the read and write operations of the pickup; a memory 15 for temporarily storing disc control information and user data to be recorded or read; and a microcomputer 16 for respectively controlling each element of the record/playback unit.

Industrial Applicability In, the above system, it is also possible to control, the recording and/or reproducing of data without the control unit 20. In that case, the.Microcomputer 16 may control all units in the recozd/playback unit 10 as performing the function of the control unit In a recording, data on an optical disc according to the present invention, the optical disc recording and reproducing apparatus first reads the entire disc management area of an. inserted optical disc, the read information being disc information of the- present invention, .which is. temporarily stored- in the memory 15. Thus, the recording layer information, recording velocity information, and write strategy fitting the corresponding recording velocity are read .out and temporarily stored.

If intending to perform a writing on a specific area within the optical disc, the controller 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 recording velocity applied to an intended recording layer within the optical disc from the management information stored in the memory 15 and then performs the writing command using the most optimal write strategy by referring to the determined recording velocity.

Specifically, in case that the recording is performed on the optical-disc by the first embodiment of the present invention, the microcomputer 16 performs the recording in a manner of applying a different per writing speed write strategy (WS) to each area- within the disc by considering the maximum, intermediate,-.minimum, and other writing speeds.

Accordingly, the present invention provides various methods of .providing disc .control information coping with higher writing 47 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.

Claims (41)

1. A .data structure comprising a recording speed information, the recording speed information comprising: a first information 'indicating a maximum recording speed; a second information indicating a minimum recording- speed; a third information indicating a predetermined recording speed different from the maximum and minimum recording speed; and a fourth information indicating a basic recording speed.

2. The data structure of claim 1, further comprising a plurality of recording speed parameters to be used or used to record data by the respective recording speeds.

3. 'The data structure of claim wherein the first to fourth information are included in a recording speed grou..

4. The data structure of claim 1, wherein the first to fourth information are included in each layer of a multi- layer optical recording medium. 49 The data structure of claim 1, wherein the fourth information includes at least two basic recording speeds.

6. The data structure of claim 1, further comprising an applicable recording speed information indicating each applicable recording speed.

7. The data structure of claim 6, wherein the applicable recording speed information indicates the each recording speed in a bit position.

8. The data structure .'of claim 7, wherein the applicable recording speed information is configured in a manner that a lower bit position is set applicable if a higher bit position is set applicable.

9. The data structure of claim 6, wherein the applicable: recording speed information has a priority to determine an applicability of specific recording speed than the recording speed information.. The data structure of claim 1, further comprising a write strategy type information indicating a write strategy type applicable to a recording of data on an optical recording medium.

11. A method of recording control information of recording medium, comprising a step of recording the control information including a plurality of recording speed information and at least one write. strategy associated with a specific recording speed wherein one of the recording speed information is a basic recoding speed information.

12.: The method of claim 11, wherein the :recording speed information further include maximum recording. speed information, minimum recording. speed information, at least one.: intermediate recording speed information of an intermediate recording speed between maximum and .minimum recording speeds applicable to the recording medium..

13. The method of claim 12, wherein a plurality of write. strategies respectively associated with corresponding the respective recording.speeds are recorded 51

14. A method of recording data on an optical recording medium, comprising the steps of generating a recording. speed. information, wherein the speed information cdmprises a first information indicating a maximum recording speed, a second information indicating a minimum recording.speed, a third, information indicating a predetermined recording speed different from.the maximum or minimum recording speed, and a fourth information indicating a basic recording speed; and recording the speed information on a specific area of the optical recording medium. The method of claim 14, further comprising the step of recording an applicable recording speed information indicating presence of the maximum, minimum, basic, and predetermined recording speeds. 1.6. The method of claim 14, further comprising the step of recording a write strategy information indicating a write strategy type.applicable to a recording of data on an optical recording medium.

17. The method of claim 14, further comprising the step of. recording a plurality of recording speed parameters to be used to record data by the respective recording speeds.

18. The method of claim 14,..further comprising the step of recording a recordable speed information indicating whether specific recording speed is applicable.

19.. The method of claim 16, wherein the recordable speed information indicates the each recording speed in a bit position. The method of claim 19, wherein the recordable speed information is recorded in a manner that a. lower bit position is set .applicable if a higher bit position is set applicable.

21. The method of claim 18, wherein the recordable .speed information has a priority to determine the applicability of' .specific recording speed than the recording, speed information. 53

22. A method of recording/reproducing. data on/from an optical recording medium, comprising the steps of: reading a speed information from a specific area of the optical recording medium, wherein the speed information comprises a first information indicating a maximum recording speed, a second informatibn indicating a minimum recording speed, a third information- indicating a predetermined recording speed different from the maximum and minimum recording speed, and a fourth information indicating a basic recording speed; and recording data on a main data area. of the optical recording.medium based on the read speed information. The method of claim 22, .wherein in the recording step, the data is recorded using one .of the read recording speeds.

24. The method of. claim 22, wherein in the recording step, the data is.recorded using the basic-recording speed. The method of claim 23, wherein in the reading step, a plurality of recording speed parameters are further read from the specific area, and the data is recorded based on the recording speed parameters associated with to the used recording speed.

26. The method of claim' 23, wherein the recording-speed parameters include write strategy type for specific recording speed.

27.. The method of claim 22, wherein the soeed information further comprises a recordable speed information indicating an applicability of the maximum, minimum, basic, and predetermined recording speeds to record .thedata using an applicable recording speed. .28. The method of claim. 22, .wherein the. speed. information further comprises a recordable speed information indicating an applicabil.ity of specific recording speed, thereby recording data using an applicable recording speed.

29. The method of claim 28, wherein the recordable speed information indicates the each recording speed in a bit position.

30. The method of"claim 29, wherein the recordable speed information is configured in a manner that a lower bit position is. set applicable if a higher bit position is set applicable.

31. The method of claim, 28, wherein the recordable speed information has a priority to determine the applicability of specific recording speed than the recording speed information.

32. A recording medium having a recording. speed information, characterized in that the recording speed information comprises a first information indicating a maximum recording speed, a second information indicating a minimum recording speed, a third information indicating a predetermined recording speed different from the maximum and minimum recording speed, and a fourth information indicating,a basic recording. speed.

33. The recording medium of claim 32, further comprising a plurality of recording speed parameters to be used to record data by the respective recording speeds.

34. The recording medium of claim 32, wherein the first to fourth information are included in. a recording -speed group..

35. The recording medium of claim 32, wherein the first to fourth information are included in each layer of a multi-layer optical recording medium.

36. The recording medium of claim 32, wherein the fourth information includes at least two basic recording speeds.

37. The recording medium of claim 32, further comprising an applicable recording speed information indicating whether specific recording speed is.applicable.

38. The recording medium of claim 37, wherein the applicable recording speed. information indicates 57 applicability of each recording speed in a bit position.

39. The recording medium of claim 38,. wherein the applicable recording speed information is configured in a manner that a lower' bit position is set applicable if a higher bit position is set applicable. The recording medium of .claim 32, further comprising a write strategy type information indicating a write strategy type applicable to a recording of data on an optical recording medium. S41. An optical disc comprising at least. one .recording layer provided with a recordable, area and a prerecorded area, -wherein disc control .information is separately recorded within the. prerecorded area per the recording layer .and wherein a plurality of recording speed information and a plurality of write strategies associated with corresponding recording speeds are recorded within the disc control information, and wherein one of the recording speed information is a basic recoding speed information.

42. The optical disc of claim 41, wherein the recording speed .information include maximum and minimum recording speed information applicable by the optical disc.

43. The optical disc of claim. 42, wherein the recording speed information include at least one intermediate recording speed information of .an .intermediate recording speed between maximum and minimum recording speeds applicable by the optical disc.

44. The optical disc of claim 41, wherein the disc is a recordable Blu-ray disc.

45.. The optical disc of claim 41, wherein the disc is a recordable DVD. An -optical disc recording method comprising the steps of: reading disc control information written within a Smanagement. area of the optical .disc and storing .a .plurality of recording speed information and write strategies respectively fitting corresponding recording speeds within the disc control information; deciding the recording speed to be applied to the optical disc by referring to a plurality of the stored speed information and the"write strategies; and performing a recording at the decided recording speed.

47. The optical disc recording method of claim 46, wherein a plurality of. the recording speed information 10 include a basic (optimal) recording speed, an applicable maximum recording speed, an applicable minimum recording speed, and an intermediate recording speed different from the maximum and minimum recording speeds. 1 5 48. The optical disc recording method of claim 47, wherein the recording is performed on an inner circumference of the optical. disc at the applicable minimum recording speed.

49. The optical disc recording method of claim 47, wherein the recording is performed on an outer. circumference, of the optical disc at the applicable maximum recording speed. The optical disc recording method of claim 47, wherein the recording is performed between the inner and outer circumferences of the optical disc at the intermediate recording-speed.

51. The optical disc. recording method of claim 46, wherein the write strategies include write strategy'types and wherein data is recorded at the decided recording speed according to the. corresponding write strategy- type.

52. An apparatus for recording or reproducing data on or Sfrom an optical disc, comprising: a pickup unit reading or writing data and a controller controlling a recording in a 'manner of controlling .the pickup unit to read disc control information recorded within a management area .of an optical disc, the disc control information including a recording. speed information, the recording speed information including a maximum .recording. .speed information, a minimum recording speed information, a basic recording speed information, a predetermined speed information different from the maximum and minimum recording speed information, deciding a recording speed from the recording speed information for the recording, and controlling the recording based on the decided recording speed.

53. The apparatus of claim 52, wherein the disc control information further includes a write strategy associated with the corresponding recording. speeds, the controller controls the recording using the write strategy associated with the decided recording speed.

54. The apparatus of claim 52, wherein the disc. control information further includes a recordable speed information to indicate whether a specific recording speed is applicable, the controller decides the recording speed based on.the recordable speed information.