WO2007004821A1 - Recording medium, and method and apparatus for recording data in the recording medium - Google Patents

Recording medium, and method and apparatus for recording data in the recording medium Download PDF

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Publication number
WO2007004821A1
WO2007004821A1 PCT/KR2006/002564 KR2006002564W WO2007004821A1 WO 2007004821 A1 WO2007004821 A1 WO 2007004821A1 KR 2006002564 W KR2006002564 W KR 2006002564W WO 2007004821 A1 WO2007004821 A1 WO 2007004821A1
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WO
WIPO (PCT)
Prior art keywords
area
layer
recording
recording medium
data
Prior art date
Application number
PCT/KR2006/002564
Other languages
French (fr)
Inventor
Sang Woon Suh
Original Assignee
Lg Electronics Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US69500605P priority Critical
Priority to US60/695,006 priority
Priority to KR10-2005-0104345 priority
Priority to KR1020050104345A priority patent/KR20070003511A/en
Application filed by Lg Electronics Inc. filed Critical Lg Electronics Inc.
Priority claimed from CN 200680023937 external-priority patent/CN101213594B/en
Publication of WO2007004821A1 publication Critical patent/WO2007004821A1/en

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Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00736Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10Digital recording or reproducing
    • G11B20/18Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1816Testing
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
    • G11B27/327Table of contents
    • G11B27/329Table of contents on a disc [VTOC]
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36Monitoring, i.e. supervising the progress of recording or reproducing
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126Circuits, methods or arrangements for laser control or stabilisation
    • G11B7/1267Power calibration
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00Record carriers by type
    • G11B2220/20Disc-shaped record carriers
    • G11B2220/21Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
    • G11B2220/215Recordable discs
    • G11B2220/218Write-once discs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00Record carriers by type
    • G11B2220/20Disc-shaped record carriers
    • G11B2220/23Disc-shaped record carriers characterised in that the disc has a specific layer structure
    • G11B2220/235Multilayer discs, i.e. multiple recording layers accessed from the same side
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00Record carriers by type
    • G11B2220/20Disc-shaped record carriers
    • G11B2220/25Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537Optical discs
    • G11B2220/2541Blu-ray discs; Blue laser DVR discs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403Layers; Shape, structure or physical properties thereof
    • G11B7/24035Recording layers
    • G11B7/24038Multiple laminated recording layers

Abstract

A multi-layered recording medium, and a method and apparatus for recording data in the recording medium are disclosed. A multi-layered recording medium, each of which includes an inner area, a data area, and an outer area, includes: first layer having at least a test area assigned to the inner area; and second layer having at least a management area assigned to the inner area, wherein the test area in the first layer is not physically located at the same location as the management area assigned to the second layer adjacent to the first layer with respect to an incident beam.

Description

[DESCRIPTION]

RECORDING MEDIUM, AND METHOD AND APPARATUS FOR RECORDING DATA

IN THE RECORDING MEDIUM

Technical Field

The present invention relates to a recording medium, and more particularly to a physical structure efficiently used when manufacturing the recording medium, and a method and apparatus for recording data in the recording medium using the physical structure.

Background Art

Generally, there has been widely used a disc acting as a recording medium capable of recording a large amount of data therein. Particularly, there has recently been developed a high-density optical recording medium capable of recording/storing high-quality video data and high-quality audio data for a long period of time, for example, a Blu-ray Disc (BD) . The BD based on the next-generation recording medium technique has been considered to be the next-generation optical recording solution capable of storing much more data than a conventional DVD. In recent times, many developers have conducted intensive research into the international standard technical specification associated with the BD along with those of other digital devices.

However, a preferred physical structure for the BD, and a preferred data management method for use in the physical structure have not yet been established, such that many limitations and problems occur in developing a BD-based optical recording/reproducing device.

Disclosure of Invention

Accordingly, the present invention is directed to a recording medium, and a method and apparatus for recording data in the recording medium that substantially obviate one or more problems due to limitations and disadvantages of the related art . An object of the present invention is to provide a new physical structure suitable for a recording medium, and a method and apparatus for recording data in the recording medium using the physical structure.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will 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 multi-layered recording medium, each of which includes an inner area, a data area, and an outer area, comprises: first layer having at least a test area assigned to the inner area; and second layer having at least a management area assigned to the inner area, wherein the test area in the first layer is not physically located at the same location as the management area assigned to the second layer adjacent to the first layer with respect to an incident beam.

In another aspect of the present invention, there is provided a method for recording data in a multi-layered recording medium comprising the steps of: a) testing a record power in a test area in first layer, and determining an optimum record power; and b) recording data at the determined optimum record power, and recording a control information according to the data recording in a management area assigned to second layer adjacent to the first layer, wherein the test area in the first area is not physically located at the same location as the management area in the second layer with respect to the incident beam. In yet another aspect of the present invention, there is provided an apparatus for recording data in a recording medium comprising: a pickup unit for recording data in the recording medium; and a control unit for testing a record power in a test area of first layer contained in the recording medium, determining an optimum record power, recording data at the determined optimum record power, and recording a control information according to the data recording in a management area assigned to second layer adjacent to the first layer, wherein the test area in the first layer- is not physically located at the same location as the management area in the second layer with respect to the incident beam.

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 intended 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 description serve to explain the principle of the invention.

In the drawings:

FIG. 1 is a dual-layered BD-R according to the present invention;

FIG. 2 is a dual-layered BD-RE according to the present invention;

FIG. 3 is a structural diagram illustrating a disc inner area according to a first preferred embodiment of the present invention;

FIG. 4 is a structural diagram illustrating a disc inner area according to a second preferred embodiment of the present invention; FIG. 5 is a structural diagram illustrating a disc inner area according to a third preferred embodiment of the present invention;

FIG. 6 is a structural diagram illustrating a disc inner area according to a fourth preferred embodiment of the present invention;

FIG. 7 is a structural diagram illustrating a disc inner area according to a fifth preferred embodiment of the present invention;

FIG. 8 is a block diagram illustrating an apparatus for recording data in a recording medium according to the present invention; and

FIG. 9 is a flow chart illustrating a method for recording data in a recording medium 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 recording medium, and a method and apparatus for recording data in the recording medium according to the present invention will hereinafter be described with reference to the annexed drawings . Prior to describing the present invention, it should be noted that most terms disclosed in the present invention correspond to general terms well known in the art, but some terms have been selected by the applicant as necessary and will hereinafter be disclosed in the following description of the present invention. Therefore, it is preferable that the terms defined by the applicant be understood on the basis of their meanings in the present invention.

The term "recording medium" for use in the present invention indicates all mediums capable of storing data therein according to various recording schemes. Representative examples of the recording medium are an disc, and a magnetic tape, etc.

For the convenience of description and better understanding of the present invention, the disc, such as a BD-R, will hereinafter be exemplarily used as the above-mentioned recording medium in the present invention. It should be noted that technical ideas of the present invention can be applied to other recording mediums without departing from the scope and spirit of the invention.

The term "Optimum Power Control (OPC) area" acting as an exemplary test area is indicative of a area assigned to perform an OPC process in the recording medium. The term "Optimum Power Control (OPC) " is indicative of a process capable of calculating an optimum record power when recording data in a recordable disc.

In other words, if the disc is seated in a specific optical recording/reproducing device, the optical recording/reproducing device repeatedly performs a process for recording data in the OPC area of the disc, and reproducing the recorded data, such that it calculates an optimum record power applicable to the disc. Thereafter, the optical recording/reproducing device uses the calculated optimum record power when recording data in the disc. Therefore, the OPC area is required for the recordable disc. In association with the above-mentioned description, a TDMA

(Temporary Disc Management Area) is an example of a management area. For example, the BD-R must update current

disc use states (e.g., a disc record state or defects generated by the data recording/reproducing process) , and

must reflect the updated information. For this purpose, the TDMA is used during the disc use time. A control information included in the TDMA includes information related to a recording layer in which TDMA is recorded and other recording layers.

The term "Multi-layer" is indicative of at least two layers. Specifically, if a multi-layer includes only two layers, this configuration is referred to as a dual-layer. The multilayer has different physical characteristics according to each layer, such that each layer require their unique OPC areas.

Specifically, the present invention can be effectively used for the multi-layered disc composed of at least three layers. In this case, although there are three layers in the above- mentioned disc, i.e., a cover layer, a spacer layer, and a recording layer, it is assumed that the present invention is limited to the recording layer for the convenience of description, such that the recording layer is referred to as a layer, and the single-layered disc and the multi-layered disc are distinguished from each other according to the number of the recording layers.

A recording medium, and a method and apparatus for recording

data in the recording medium will hereinafter be described

with reference to the annexed drawings . The present invention relates to an inner area of a multi- layered disc. For example, if N layers are contained in the disc, the layers are sequentially arranged in the order of a first layer (Layer 0, "LO"), a second layer (layer 1, "Ll"), , ,, an N-th layer (Layer N-I, "Ln-I") on the basis of a specific layer mostly distant from an incident direction of an optical beam. Needless to say, the above-mentioned layers may also be sequentially arranged on the basis of a specific layer closest to the optical beam incident direction, and the scope of the present invention is not limited to the above- mentioned examples. In association with the above-mentioned description, although the number of layers contained in the disc is not limited to a specific number, it is preferable that the maximum number of layers allowable in a single disc is about 8 considering that a disc thickness (t) is typically set to 1.2mm. Referring to a cross-sectional view of the disc, each layer

(LO, Ll, ..., or Ln-I) of the disc may be classified into an inner area, a data area, and an outer area on the basis of a disc inner area.

A specific area contained in each of the inner area and the outer area is used as either a record area for recording disc management information (DMI) or a test area. The data area records actual user data therein.

In this case, a spare area for the disc management may also be contained in the above-mentioned data area. The present invention relates to a recordable recording medium, such that the OPC area is contained in each of all layers contained in the disc, and OPC areas of adjacent layers (or neighboring layers) are not physically located at the same locations on the basis of a proceeding direction of the optical beam.

In other words, in order to perform the OPC process, a power value for the test is sequentially used in the range from a high power value to a low power value or alternatively. If the OPC area is physically located at the same location on the basis of the optical beam proceeding direction between the neighboring layers, the probability of encountering an beam interference capable of occurring in not only a really- used OPC area but also other OPC areas contained in the neighboring layers is increased. From the viewpoint of the purposes of the OPC area capable of calculating the optimum record power, the increasing probability of the beam interference may have a negative influence upon the calculation of the optimum record power. Therefore, it is assumed that the present invention includes zigzag-configured OPC areas according to the purposes of the OPC areas, and the TDMA location capable of being affected by the OPC result may be established in consideration of the

OPC-area location. FIG. 1 is a dual-layered BD-R according to the present

invention. FIG. 2 is a dual-layered BD-RE according to the present invention.

FIGS. 1~2 show the dual-layered discs. Specifically, individual inner areas of the BD-R and BD-RE from among a plurality of areas of each layer of the disc will hereinafter

be described with reference to FIGS. 1~2.

A detailed description of the inner area will hereinafter be described. The inner area includes a PIC (Permanent Information & Control data) area, an OPC area for performing the OPC process. The PIC area records disc management information as an embossed HFM (High Frequency Modulated) signal .

In association with the above-mentioned description, a write- once BD-R further includes a Temporary Disc Management Area (TDMA) adjacent to the OPC area, but a BD-RE includes a reserved area in the vicinity of the OPC area.

Referring to the inner area of the BD-R of FIG. 1, a PIC area, an OPCO area, and a TDMAO area are sequentially contained in the layer LO. An OPCl area, a TDMAl area, and a reserved area are contained in the layer Ll. Referring to the inner area of the BD-RE of FIG. 2, a PIC area, an OPCO area, and a reserved area are sequentially contained in the layer "LO". A PIC area, a reserved area, and an OPCl area are contained in the layer "Ll". As described above, the inner area of the BD-R of FIG. 1 is different from that of the BD-RE of FIG. 2, and the reason why the inner area of the BD-R is different from that of the BD-RE is as follows.

Firstly, the BD-R acts as a write-once recording medium, such that data can be recorded in the BD-R only one time. In other words, the disc management scheme and the defect management scheme of the BD-RE are different from those of the BD-R.

In association with the above-mentioned disc management scheme, there is no need for the inner area of the BD-RE to include the TDMA, but there is a need for the inner area of the BD-R to include the TDMA for the disc management required for the data record process. Therefore, the inner area of the BD-R to which the TDMA is assigned is different from that of the BD-RE to which no TDMA is assigned. Secondly, the OPC area is assigned to the inner area. In more detail, the BD-RE does not include a specific area (e.g., a TDMA) to which data capable of being affected by the OPC result of the OPC area is recorded, such that no problem occurs in the BD-RE. However, the BD-R includes the TDMA capable of being affected by the OPC result, such that the OPC area and the TDMA contained in each layer must be assigned at different locations to prevent the occurrence of a negative influence caused by the arrangement of the OPC area and the TDMA. As a result, the inner area of the BD-RE must be designed to be different from that of the BD-R.

In association with the above-mentioned description, the present invention provides an improved inner area structure for preventing data stored in the TDMA from being damaged by the OPC result of the neighboring layers in the multi-layered disc, such that it can effectively use the disc. Referring to the inner area structure of the layers LO and Ll of the BD-RE shown in FIG. 2, at least one OPC area is contained in each layer, and the OPCO area and the OPCl area are physically located at different locations with respect to

the incident beam. As a result, the OPC result between the OPCO area and the OPCl area, i.e., a Hi-power Recording effect, may have no influence upon the neighboring layer. Referring to the inner area structure of the layers LO and Ll of the BD-R shown in FIG. 1, the OPCl area of the layer Ll is located at the same location as the PIC area of the layer LO with respect to the incident beam.

In this case, no data is recorded in the PIC area, and the PIC area is configured in the form of a wobbled shape, such that the PIC area is not affected by the OPC result of the OPC area of the layer Ll.

A TDMA for recording disc management information and other

data therein is located at the same location as the OPCl area of the layer LO with respect to the incident beam, such that the OPC result of the OPCO area may affect the TDMAl. The above-mentioned situation indicates that the OPC result may unavoidably deteriorate RF-signal jitters of each layer. Therefore, it is desirable that important RF-format data may not be recorded in the layers of the BD-R.

Although the dual-layered disc has been disclosed in FIG. 1, it should be noted that the maximum number of layers allowable in a single disc (such as a BD) may be determined to be about λλ8". An inner area structure capable of effectively employing the disc will hereinafter be described with reference to FIGS.

3~7.

The present invention is characterized in that the OPC area and the TDMA are not physically located at the same location with respect to the incident beam so as to prevent TDMA data from being damaged by the OPC result.

If the OPC area is located at the same location as the TDMA, the OPC result may affect data of the TDMA, such that unexpected defects occur in the disc management information,

resulting in the occurrence of problems in data recording/reproducing operations of the disc.

Therefore, the OPC area and the TDMA of each layer must not be physically located at the same locations with respect to the incident beam. In this case, there is no need for each TDMA of each layer to be located at the same location. For the convenience of description, it is assumed that the each TDMA of each layer are located at the same location. FIG. 3 is a structural diagram illustrating a disc inner area according to a first preferred embodiment of the present invention. FIG. 3 shows a dual-layered disc. As can be seen

from FIG. 3, an inner area of the layer LO sequentially includes a PIC area, an OPC area, and a TDMAO area on the basis of the disc inner area. An inner area of the layer Ll sequentially includes an OPCl area, a reserved area, and a TDMAl on the basis of the disc inner area. The OPC result of the OPCl area from among the inner area of the layer Ll may have almost no influence upon the PIC area of the layer LO.

However, the OPC result of the OPCO area from among the inner area of the layer LO may affect the TDMAl of the layer Ll. Therefore, the disc of the present invention comprises the TDMA not to be physically located at the same location as the OPCO area with respect to the incident beam. Therefore, a reserved area, instead of the TDMAl, is physically located at the same location as the OPCO area with respect to the incident beam, such that data is not recorded in the reserved area, and the disc is not affected by the OPC result. Therefore, in the case of the inner area structure (See FIG. 3) according to the present invention, the TDMAO and the TDMAl of each layer LO and Ll are physically located at the same location with respect to the incident beam, and a reserved area is physically located at the same location as the OPC area with respect to the incident beam. FIG. 4 is a structural diagram illustrating a disc inner area according to a second preferred embodiment of the present invention. The concept of FIG. 3 is extended to the configuration of FIG. 4. FIG. 4 exemplarily shows an inner area structure of the disc composed of 4 layers. Referring to the above-mentioned inner area structure of FIG. 4, the layers LO and Ll have the same inner areas as those of the dual-layered disc of FIG. 3. Also, the layers L2 and L3 are equal to the layers LO and Ll. The structure of FIG. 4 is formed by repetition of the inner area of the dual-layered disc of FIG. 3. Therefore, the inner area of the layer LO sequentially includes a PIC area, an OPCO area, and a TDMAO. The inner area of the layer Ll sequentially includes an OPCl area, a reserved area, and a TDMAl. The inner area of the layer L2 sequentially includes a PIC area, an OPC2 area, and a TDMA2. The inner area of the layer L3 sequentially includes an OPC3 area, a reserved area, and a TDMA3.

In this case, the OPC result of the OPCl area , and the OPC result of the OPC3 area have almost no influence upon the

disc, because the PIC area of the layer LO and the PIC area of the layer L2 are embossed in the form of wobbles. However, the OPC result of the OPCO area of the layer LO and the OPC result of the OPC2 area of the layer L2 affect individual neighboring layers located at the same locations with respect to the incident beam. In other words, the OPC result of the OPCO area affects the layer Ll, and the OPC result of the OPC2 area affects the layer Ll or L3.

Therefore, in order to minimize the influence caused by the above-mentioned OPC results of the OPCO area and the OPC2 area, the TDMAl and the TDMA3 are not physically located at the same locations as the OPCO and OPC2 areas with respect to the incident beam, and the reserved areas having no data are physically located at the same locations as the OPCO and OPC2 areas, such that the influence of the OPC result may be minimized. In this case, if each TDMA is arranged as mentioned above, an overall inner area structure shown in FIG. 4 is extended to

the layers L0~L3, the TDMAs of each layer L0~L3 are physically located at the same location with respect to the incident beam, and the reserved areas are physically located at the same location as the OPC areas with respect to the incident beam, such that the OPC areas and the reserved areas

are alternately arranged in the layers L0~L3. Therefore, the disc is not affected by the OPC results of the OPC areas, such that the disc can be more effectively used. FIG. 5 is a structural diagram illustrating a disc inner area according to a third preferred embodiment of the present invention. As previously mentioned above, a maximum of 8 layers may be contained in a single disc. FIG. 5 exemplarily shows an inner area structure when 8 layers are contained in the single disc. In more detail, FIG. 5 exemplarily shows an 8-layered disc formed by the extension of the dual-layered disc of FIG. 3 and the 4-layered disc of FIG. 4.

The LO and Ll structures of FIG. 5 are equal to those of the inner areas of the dual-layered disc shown in FIG. 3. The L2 and L3 structures of FIG. 5 are equal to those of the LO and Ll structures of FIG. 4. In more detail, the structure of FIG. 5 is formed by repetition of the inner area of the dual- layered disc of FIG. 3. Therefore, the inner area of the layer LO sequentially includes a PIC area, an OPCO area, and a TDMAO. The inner area of the layer L2 sequentially includes a PIC area, an OPC2 area, and a TDMA2. The inner area of the layer L4 sequentially includes a PIC area, an OPC4 area, and a TDMA4. The inner area of the layer L6 sequentially includes a PIC area, an OPC6 area, and a TDMA6. The inner area of the layer Ll sequentially includes an OPCl area, a reserved area, and a TDMAl. The inner area of the layer L3 sequentially includes

an OPC3 area, a reserved area, and a TDMA3. The inner area of the layer L5 sequentially includes an OPC5 area, a reserved area, and a TDMA5. The inner area of the layer L7 sequentially includes an OPC7 area, a reserved area, and a TDMA7.

The access sequences of the OPC areas and the TDMAs are sequentially determined in the range from the layer LO to the layer L7.

The PIC areas contained in the layers LO, L2, L4, and L6 of FIG. 5 are not affected by the OPC results of the OPC areas (i.e., OPCl, OPC3, OPC5, and OPC7 areas) contained in the layers Ll, L3, L5, and L7 adjacent to the layers LO, L2, L4, and L6.

However, the TDMA including the disc management information in each layer is affected by the above-mentioned OPC result. In other words, the OPC result of the OPCO area of the layer LO affects the layer Ll, and the OPC result of the OPC2 area of the layer L2 affects the layers Ll and L3. Also, the OPC result of the OPC4 area in the layer L4 affects the layers L3 and L5, and the other OPC result of the OPCβ area in the layer L6 affects the layers L5 and L7. In order to minimize the negative influence upon the adjacent layers caused by the above-mentioned OPC results, the OPC areas of the present invention are not physically located at the same locations as the TDMAs with respect to the incident beam. In this case, it is preferable that the TDMAs of each layer of the disc shown in FIG. 5 are physically located at the same location with respect to the incident beam. Reserved areas, instead of a data record area capable of being affected by the OPC result, may be physically located at the same locations as the OPC2 area, the OPC4 area, and the OPC6 area with respect to the incident beam.

Therefore, the above-mentioned inner area structure according to the present invention prevents the occurrence of problems caused by the OPC results, resulting in increased efficiency of the disc. FIG. 6 is a structural diagram illustrating a disc inner area according to a fourth preferred embodiment of the present invention. FIG. 7 is a structural diagram illustrating a disc inner area according to a fifth preferred embodiment of the present invention.

FIGS. 6~7 show the conceptual and structural diagrams of the discs shown in FIGS. 3 to 5. FIG. 6 is an example of an inner area structure of a 4-layered disc. FIG. 7 is an example of an inner area structure of an 8-layered disc. In other words, since data units stored in a plurality of PIC

areas contained in the discs of FIGS. 4~5 are equal to each other, FIGS. 6~7 show examples of disc inner areas (e.g., buffer zones) replaced with unrecorded areas (i.e., areas incapable of recording data therein) , excepting the PIC area contained in the initial layer of the disc composed of a plurality of layers. The structure of FIG. 6 is basically equal to that of FIG. 4. As can be seen from FIG. 6, the PIC area is replaced with a buffer zone in the layer L2.

The structure of FIG. 7 is basically equal to that of FIG. 5. As can be seen from FIG. 7, the PIC areas are replaced with the buffer zones in the layers L2, L4, and L6 with respect to the incident beam.

The above-mentioned disc inner area structures of FIGS. 3~7 describe a variety of preferred embodiments of the present invention. Although the inner area structure is changed to another structure, the changed structure is not affected by the OPC result due to the TDMA capable of recording the disc management information therein, such that the scope and design of the present invention is not limited to the above- mentioned examples, and can also be applied to other examples as necessary.

FIG. 8 is a block diagram illustrating an apparatus for recording data in a recording medium according to the present invention. Referring to FIG. 8, an apparatus for recording data in a recording medium includes a recording/reproducing unit 10 for recording/reproducing data in/from a disc, and a controller 12 for controlling the recording/reproducing unit 10. The recording/reproducing unit 10 includes a pickup unit 11,

a signal processor 13, a servo unit 14, a memory 15, and a microprocessor 16. The pickup unit 11 directly records data in the disc, or reads data recorded in the disc. The signal processor 13 receives a signal read from the pickup unit 11, restores the received signal to a desired signal value, or modulates a signal to be recorded into another signal recorded in the disc, such that it transmits the recovered or modulated result. The servo unit 14 controls operations of the pickup unit 11, such that it correctly reads a desired signal from the disc, and correctly records the signal in the disc. The memory 15 temporarily stores not only management information but also data. The microprocessor 16 controls overall operations of the above-mentioned components. The above-mentioned recording/reproducing unit 10 performs a test in a test area of a recording medium, calculates an optimum record power, and records data using the calculated optimum record power.

In association with the above-mentioned description, the recording device composed of only the recording/reproducing unit 10 is referred to as a driver, and is generally used as a peripheral device of a computer.

The controller 12 controls operations of overall constituent components. In association with the present invention, the controller 12 refers to a user command by interfacing with a user, and transmits a recording/reproducing command capable of recording/reproducing data in/from the disc to the recording/reproducing unit 10.

The microprocessor 16 performs a test associated with the record power in the test area of the first layer, calculates an optimum record power, and records data using the calculated optimum record power, such that it records a control information (e.g., disc management information) according to the data recording process in the management area assigned the second layer adjacent to the first layer. In this case, the test area in the first layer is not physically located at the same location as the management area in the second with respect to the incident beam. In association with the preset invention, the functions of the controller 12 and the microprocessor 16 can be separated and operated by a first control unit and a second control unit, respectively. Alternatively, the functions of the controller 12 and the microprocessor 16 can be combined and operated as a single control unit.

The decoder 17 decodes a signal read from the disc upon receiving a control signal from the controller 12, restores the decoded signal to desired information, and transmits the restored signal to the user.

The encoder 18 receives a control signal from the controller

12 to record a desired signal in the disc, converts the received signal into a specific-format signal (e.g., an MPEG2

transport stream) , and transmits the specific-format signal to the signal processor 13.

A method for recording data in a multi-layered recording medium using the apparatus shown in FIG. 8 will hereinafter be described with reference to FIG. 9. FIG. 9 is a flow chart illustrating a method for recording data in a recording medium according to the present invention. Referring to FIG. 9, an optimum record power for recording data in a recording medium must firstly be calculated to record data in a multi-layered recording medium. For this operation, a record power of the OPC area is tested, such that the optimum record power is determined at step SlO. Then, the apparatus for recording data records data using the determined optimum record power of the recording medium at step S20. If the data recording operation of the above-mentioned recording medium begins, the apparatus for recording data records disc management information (DMI) and other data in the TDMA generated by the record process in the TDMA at the above-mentioned determined optimum record power. In this case, the OPC areas of each layer are not physically located at the same locations as the TDMAs of neighboring layers adjacent to the above-mentioned layers including the

OPC areas with respect to the incident beam. For example, in the case of the 8-layered recording medium, the OPC area exists in the layer L5, the TDMAs of the layers L4 and Lβ are not physically located at the same locations as the OPC area of the layer L5 with respect to the incident beam at step S30, such that the TDMAs of the layers L4 and Lβ are not affected by the OPC result executed by the OPC area. As apparent from the above description, a recording medium, and a method and apparatus for recording data in the recording medium according to the present invention can be applied to a method for manufacturing a recently-developed multi-layered BD, and can effectively record/reproduce data in/from the disc.

Industrial Applicability

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. 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

[CLAIMS]
1. A multi-layered recording medium, each of which includes an inner area, a data area, and an outer area, comprising: first layer having at least a test area assigned to the inner area; and second layer having at least a management area assigned to the inner area, wherein the test area in the first layer is not physically located at the same location as the management area assigned to the second layer adjacent to the first layer with respect to an incident beam.
2. The recording medium according to claim 1, wherein the test area is an OPC (Optimum Power Control) area.
3. The recording medium according to claim 2, wherein the second layer further includes test area, wherein the test area assigned to the first layer is not physically located at the same locations as the test area of the second layer with respect to the incident beam.
4. The recording medium according to claim 1, wherein the management area is a TDMA (Temporary Disc Management Area) in write-once type of recording layer.
5. The recording medium according to claim 4, wherein all the TDMAs assigned to each layer are physically located at the same locations with respect to the incident beam.
6. The recording medium according to claim 1, wherein the record area for recording data in first area is not physically located at the same location as the second layer including a test area with respect to the incident beam.
7. The recording medium according to claim 1, wherein a reserved area in the first layer is physically located at the same location as a test area in the second layer with respect to the incident beam.
8. The recording medium according to claim 1, wherein a PIC (Permanent Information & Control data) area in first layer is physically located at the same location as a test area in the second layer with respect to the incident beam.
9. The recording medium according to claim 1, wherein a
buffer zone in the first layer is physically located at the same location as a test area in the second layer of the layer with respect to the incident beam.
10. The recording medium according to claim 1, wherein the recording medium is a write-once BD-R (Blu-ray Disc Recordable) .
11. A method for recording data in a multi-layered recording medium comprising: a) testing a record power in a test area in first layer, and determining an optimum record power; and b) recording data at the determined optimum record power, and recording a control information according to the data recording in a management area assigned to second layer adjacent to the first layer, wherein the test area in the first area is not physically located at the same location as the management area in the second layer with respect to the incident beam.
12. The method according to claim 11, wherein the test area is an OPC (Optimum Power Control) area.
13. The method according to claim 11, wherein the management area is a TDMA (Temporary Disc Management Area) in write-once type of recording layer.
14. An apparatus for recording data in a recording medium comprising: a pickup unit for recording data in the recording medium; and a control unit for testing a record power m a resr. area or first layer contained in the recording medium, determining an optimum record power, recording data at the determined optimum record power, and recording a control information according to the data recording in a management area assigned to second layer adjacent to the first layer, wherein the test area in the first layer is not physically located at the same location as the management area in the second layer with respect to the incident beam.
15. The apparatus according to claim 14, wherein the test area is an OPC (Optimum Power Control) area.
16. The apparatus according to claim 14, wherein the management area is a TDMA (Temporary Disc Management Area) in write-once type of recording layer.
PCT/KR2006/002564 2005-06-30 2006-06-30 Recording medium, and method and apparatus for recording data in the recording medium WO2007004821A1 (en)

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