WO2006075696A1 - 情報記録媒体、情報記録装置及び方法、並びに記録制御用のコンピュータプログラム - Google Patents
情報記録媒体、情報記録装置及び方法、並びに記録制御用のコンピュータプログラム Download PDFInfo
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- WO2006075696A1 WO2006075696A1 PCT/JP2006/300366 JP2006300366W WO2006075696A1 WO 2006075696 A1 WO2006075696 A1 WO 2006075696A1 JP 2006300366 W JP2006300366 W JP 2006300366W WO 2006075696 A1 WO2006075696 A1 WO 2006075696A1
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Classifications
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- G11B7/00—Recording 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
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Definitions
- Information recording medium information recording apparatus and method, and computer program for recording control
- the present invention relates to a multi-layer information recording medium such as a dual-layer DVD and CD (Compact Disc), and an information recording apparatus and method such as a DVD recorder for recording information on the information recording medium.
- the present invention relates to the technical field of computer programs for recording control.
- Information recording such as CD-ROM (Compact Disc-Read Only Memory), CD-R (Compact Disc-Recordable), DVD-ROM, DVD-R, DVD-RW, and DVD + R
- an information recording medium such as a multilayer type or dual layer type optical disk in which a plurality of recording layers are laminated or bonded on the same substrate is also available.
- a DVD recorder that records on a dual layer type, that is, a two-layer type optical disc, the foremost side (ie, the side closer to the optical pickup) when viewed from the laser beam irradiation side.
- L0 layer By concentrating the recording laser beam on the recording layer (referred to as “L0 layer” in this application as appropriate) located at, information can be irreversibly changed by heating or rewritable to the L0 layer.
- Recording layer, and recording layer (referred to as “L1 layer” as appropriate in this application) located on the far side of the L0 layer (that is, the side far from the optical pickup force) when viewed from the laser beam irradiation side through the L0 layer, etc.
- L1 layer By collecting the laser beam, information is recorded on the L1 layer by an irreversible change recording method such as heating or a rewritable method.
- the L1 layer is irradiated via the recorded L0 layer as shown in FIG. 14 (a), for example.
- the optimum recording power of the laser beam is 44.5 (mW: milliwatt), which minimizes the jitter value on the parabola of the thin line (white triangle) in Fig. 14 (c).
- FIG. 14 (b) the optimum recording power of the laser light irradiated to the L1 layer through the unrecorded L0 layer, which has a light transmittance different from that of the recorded L0 layer, is shown in FIG.
- the L0 layer and the L1 layer are formed by separate stampers, and the respective recording layers are bonded or laminated.
- eccentricity may occur due to a bonding error.
- the L0 layer and the L1 layer are respectively created by different stampers, a deviation occurs in the track pitch in each recording layer, or the absolute radial position with respect to the reference address in each recording layer Deviations, so-called dimensional errors, may occur.
- the recording area of the L0 layer is displaced in the radial position of the recording area of the L1 layer corresponding to the address information such as the preformat address! /, And the above recording requirements must be satisfied.
- a recording laser beam that has been transmitted through the L0 layer where a recorded area and an unrecorded area are mixed on a single track is irradiated.
- the amplitude of the reproduction signal varies depending on the amount of eccentricity, that is, the asymmetry value transitions from one level to the other between an appropriate level and an incorrect level.
- the recording device force detecting the recording state of the recording area of the L0 layer corresponding to the recording area of the L1 layer is described above. Since it is also necessary to accurately recognize the relative displacement, the recording control process becomes complicated. I will end up. On the other hand, if information is recorded while ignoring the optimum recording power deviation due to this relative deviation, a processing parameter for obtaining a binary signal in a reproducing apparatus that reproduces the recorded information. Since this must be changed dynamically, the control becomes complicated, increasing the load in the playback process.
- the inventors of the present application do not cause a problem of deviation in reproduction quality of recorded information even if recording is performed between the LO layer and the L1 layer at a normal time with a constant recording power.
- a method for prescribing the relationship between the address and the physical radial position has been devised. Specifically, the recording medium is created such that the radial position in the address system of the L1 layer corresponding to this address system is located on the inner circumference side in the address system of the LO layer.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-311346
- Patent Document 2 Japanese Patent Laid-Open No. 2001-23237
- the address offset value on the other side satisfies the recording requirement more than necessary, in other words, the waste of the recording area for satisfying the recording requirement increases. It has a technical problem.
- the present invention has been made in view of, for example, the conventional problems described above. For example, even an information recording medium having a plurality of recording layers can record information more efficiently. It is an object of the present invention to provide an information recording medium, an information recording apparatus and method, and a computer program that causes a computer to function as such an information recording apparatus.
- the information recording medium of the present invention has at least a spiral or concentric first track for recording information (address and radial position in the LO layer).
- a first recording layer (LO layer) formed with a laser beam, and a spiral or concentric circle that is irradiated with laser light through the first recording layer and shares the center of rotation with the first track.
- the second recording layer is indicated by (i) a second address corresponding to the first address, and (ii) with respect to the first point (Bx point).
- Second point (Dx point) that can be defined based on a predetermined positional relationship (an ideal positional relationship that takes into account the standard eccentricity a at the UDA start position and a positional relationship that takes into account the dimensional error and eccentricity)
- recording information is written along, for example, the first track of the first recording layer.
- recording information is written along, for example, the second track of the second recording layer.
- the first track is directed from one side to the other of the inner and outer peripheral sides of, for example, a disk-shaped substrate provided in the information recording medium, and conversely, the second track is Alternatively, the configuration may be such that the directional force is directed from one side to the other side.
- the two-layer or multi-layer information recording medium enables continuous recording by the “opposite method” in which the recording track is directed in the opposite direction between the two recording layers.
- the recording layer as a target of the recording process or reproduction process related to the information is performed.
- the laser beam irradiation position in the substrate surface can be changed little or not in the radial direction, so that a quick interlayer jump (ie, interlayer switching operation) is possible.
- interlayer switching operation For example, when recording continuous recording information such as a movie, it becomes easy to perform continuous playback without requiring a special buffer function for switching the recording layer. In this sense, it is very convenient in practice.
- the first track is directed from one side to the other side of the inner circumferential side and the outer circumferential side described above, and the second track is also from the one side to the other side in the same manner as the first track. It may be configured to head toward. That is, in the two-layer or multilayer information recording medium, continuous recording by the “parallel method” is possible in which the track faces the same direction between the two recording layers. In this parallel method, when recording or reproduction on the first recording layer is completed, recording or reproduction on the second recording layer is started, for example, at the outermost periphery of the optical disc. Since the optical pickup needs to move again toward the innermost circumference, the first recording layer force also takes a longer time to switch to the second recording layer than the above-described object method.
- the second recording layer according to the present invention is (i) indicated by a second address corresponding to the first address, and (ii) based on a predetermined positional relationship with respect to the first point. And has a second point that can be defined.
- the “predetermined positional relationship” according to the present invention can uniquely specify another radial position from one radial position based on a predetermined relational expression, a table indicating the predetermined relationship, or the like. Means a relationship.
- “correspondence” according to the present invention means a relationship in which one address power and another address can be uniquely specified. Specifically, if one address and another address have a complement relationship, it can be said that one address corresponds to another address. More specifically, the first point is opposite to the second point.
- “opposite” according to the present invention may mean that the radial positions are substantially equal, and may mean that they are substantially equal, including a predetermined margin, for example.
- the difference between the radial position of the first point and the radial position of the second point is determined from one of the inner peripheral side and the outer peripheral side with the address in the first recording layer as a variable.
- it is defined to be within a predetermined range. Therefore, for example, an addition or subtraction to the address for specifying the position of the second recording layer determined to reduce the influence of the relative displacement between the first recording layer and the second recording layer on the outer peripheral side.
- the address offset value is not only suitable for satisfying the recording requirements on the outer circumference side, but also on the inner circumference side. However, it is possible to meet the recording requirements appropriately.
- waste of the recording area in the information recording medium of the present invention can be minimized and the recording area can be used more efficiently in accordance with the recording procedure for appropriately satisfying the recording requirement. Becomes pretty.
- the radius of the first point is larger than the radius of the second point.
- the radius of the first point is determined to be larger than the radius of the second point.
- the second address is a value obtained by bit-inverting the first address.
- this address is used.
- the offset value can appropriately satisfy the recording requirement on the inner peripheral side as well as the recording requirement on the outer peripheral side.
- the predetermined positional relationship is indicated by a function having the first address (X) as a variable.
- the second point can be more easily defined.
- the predetermined positional relationship is indicated by a table having at least the first address (X) as a parameter.
- the predetermined positional relationship is indicated by a table having the first address (X) as a parameter, for example, various control processes by, for example, a manufacturing apparatus for defining the second point are performed. It becomes possible to make it quick.
- the first address (X) is defined based on a predetermined unit (ECC block) indicating a data amount.
- ECC block predetermined unit
- the predetermined positional relationship is that the recording linear density indicating the data amount per unit length in the first track and the second track is In the recording area of the first recording layer and the second recording layer, at least within a desired range and numerically designated so that it can be easily calculated! Is done.
- the predetermined relational expression that defines the predetermined positional relationship is, for example, an information recording This can be easily derived based on the area of the recording area in the first recording layer and the second recording layer of the medium.
- the first recording layer has a first reference point (D0Z2) indicated by a first reference address
- the second recording layer is A second reference point (D0Z2-a) located at a radial position including a standard radial difference (a) indicating an error in the standard radial position at the radial position of the first reference point, and the predetermined positional relationship (I) the radial position (R (X)) of the first point, (ii) the amount of difference data determined by the first address and the first reference address, and the second reference point
- the ideal error (R (X)-Ri () is the difference from the radial position (Ri (X)) of the second ideal point indicated by the second ideal address that is theoretically determined based on the second reference address X)
- the positional relationship is based on).
- the predetermined relational expression that defines the predetermined positional relationship is derived easily and with high accuracy based on, for example, the area of the recording area in the optical disk and the standard radius difference (a). It becomes possible to do.
- the first point indicated by the first address is: (i) the difference data amount that is a difference between the first reference address and the first address; (ii) It may be configured as shown by a predetermined relational expression using a value indicating the recording linear density in the first recording layer as a parameter.
- the radial position of the first point included in the predetermined relational expression that defines the predetermined positional relation can be derived more easily based on, for example, a linear function or a spiral integral calculation. Is possible.
- the second point indicated by the second address is: (i) the difference data amount that is a difference between the second reference address and the second address; (ii) It may be configured as shown by a predetermined relational expression using a value indicating the recording linear density in the second recording layer as a parameter.
- the radial position of the second point included in the predetermined relational expression that defines the predetermined positional relation can be derived more easily based on, for example, a linear function or a spiral integral calculation. Is possible.
- the predetermined positional relationship is: (i) the first description A dimensional error held by each of the recording layer and the second recording layer, (ii) an eccentric amount generated based on a bonding error between the first recording layer and the second recording layer, and (iii) the second When the laser beam is irradiated so as to be focused on the recording layer, the laser beam is irradiated so as not to be focused on the first recording layer while passing through the first recording layer.
- the positional relationship is set so as to include at least one of the transmitted light diameters indicating the radius of the region.
- the predetermined positional relationship is defined such that a radial position of the second point is within a predetermined range.
- the second point it is possible to define the second point more strictly so that the second point is within a predetermined range defined by, for example, the upper limit and the lower limit of the error in the radial position.
- the information recording apparatus of the present invention is the above-described information recording medium of the present invention (including various aspects thereof), and the first recording layer has the first recording layer.
- control means to control said recording device to record the record information.
- the radial position of the first point indicated by the first address and the radial position of the second point indicated by the second address corresponding to the first address The positional relationship between and can be easily and easily detected. Based on the detected positional relationship, it is possible to detect whether or not the recording requirement is properly satisfied at least at the second point.
- the waste of the recording area in the information recording medium according to the present invention is minimized and more efficiently.
- the recording area can be used.
- the information recording method of the present invention is the above-described information recording medium of the present invention (including various aspects thereof), and the first recording layer includes the first recording layer.
- An information recording apparatus comprising a recording means for recording the recording information on an information recording medium capable of forming an area and forming a second recording area in the second recording layer (I) the second address in the second recording layer corresponding to the first address desired in the first recording layer, and (ii) depending on the first address
- the information recording method of the present invention can also adopt various aspects.
- a computer program for recording control provides A computer program for recording control for controlling a computer provided in the information recording apparatus of the present invention described above (including various aspects thereof), the computer comprising the recording means, the calculating means, and the computer Function as at least part of the control means
- the computer program of the present invention if the computer program is read from a recording medium such as a ROM, a CD-ROM, a DVD-ROM, and a hard disk that stores the computer program and then executed by the computer, Alternatively, if the computer program is downloaded to a computer via communication means and then executed, the above-described information recording apparatus of the present invention can be realized relatively easily.
- the computer program of the present invention can also adopt various aspects.
- a computer program product in a computer-readable medium is executable by a computer provided in the above-described information recording apparatus of the present invention (including various forms thereof).
- Program instructions are clearly embodied, and the computer is caused to function as at least a part of the recording unit, the calculating unit, and the control unit.
- the computer program product of the present invention if the computer program product is read into a computer from a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program product, or
- a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program product
- the computer program product which is a transmission wave
- the computer program product which is a transmission wave
- the computer program product may comprise a computer readable code (or computer readable instruction) that functions as the information recording apparatus of the present invention described above.
- the first recording layer having the first point and the second point that can be defined based on the predetermined positional relationship with the first point are provided. And a second recording layer. Therefore, in the recording procedure to properly meet the recording requirements, The waste of the recording area in the information recording medium of the invention is minimized, and the recording area can be used more efficiently.
- a recording means, a calculating means and a process, and a control means and a process are provided. Accordingly, in the recording operation for appropriately satisfying the recording requirement by the information recording apparatus according to the present invention, the waste of the recording area in the information recording medium according to the present invention is minimized, and the recording area is used more efficiently. Can be done.
- the information recording apparatus can be used to waste the recording area in the above-described information recording medium. It is possible to minimize the recording area and use the recording area more efficiently.
- FIG. 1 is a schematic plan view (FIG. 1 (a)) showing a basic structure of an optical disc having a plurality of recording areas according to an embodiment of the information recording medium of the present invention, and a schematic cross-sectional view of the optical disc.
- FIG. 1 (b) This is a schematic conceptual diagram (Fig. 1 (b)) of the recording area structure in the radial direction associated with this.
- FIG. 2 A graph (FIG. 2 (a)) showing a specific example of the relationship between the address and the radial position in the LO layer and the L1 layer according to the first recording layer and the second recording layer of the present invention, and other This is a graph showing a specific example (Fig. 2 (b)).
- FIG. 3 is a schematic diagram (FIG. 3 (a)) conceptually showing dimensional errors held by the LO layer and the L1 layer, respectively, according to the first recording layer and the second recording layer of the present invention, and the LO layer.
- Fig. 3 (b) is a schematic diagram conceptually showing the eccentricity generated based on the bonding error between the L1 layer and the L1 layer.
- FIG. 4 Irradiation position between the irradiation position where the laser beam is irradiated in the L1 layer according to the second recording layer of the present invention and the irradiation position where the laser beam is irradiated in the LO layer according to the first recording layer of the present invention. It is the schematic diagram which showed the error notionally.
- FIG. 5 LO in the case of a dimensional error, pasting error (eccentricity), and irradiation position error in the LO and L1 layers of the first and second recording layers of the present invention. Positional relationship between one track in the layer and other tracks in the L1 layer corresponding to the one track It is the schematic top view which showed.
- FIG. 6 At least one of a dimensional error, a pasting error (eccentricity), and an irradiation position error occurred in the LO layer and the L1 layer according to the first recording layer and the second recording layer of the present invention.
- 6 is a graph showing a specific example of the relationship between the address and the radial position in this case.
- FIG. 8 (a) A conceptual diagram showing the process of calculating the radial position (R (X)) of the first point “Bx point” in the LO layer of the first recording layer of the present invention (FIG. 8 (a)), and Conceptual diagram showing the process of calculating the radial position (Ri (x)) of the ideal point “Dix point” indicated by the ideal address theoretically determined for the L1 layer of the second recording layer of the present invention (Fig. 8 (b)).
- FIG.10 In general, the diagram shows a thick donut-shaped recording area “S1” on the inner circumference and a thin donut-shaped recording area “S2” on the outer circumference, corresponding to a fixed address offset value. It is a top view of the optical disk shown specifically.
- FIG. 11 is a cross-sectional view schematically showing the length in the radial direction of the recording area shown in FIG.
- FIG. 12 is a block diagram showing the basic configuration of an information recording / reproducing apparatus and a host computer in an embodiment according to the information recording apparatus of the present invention.
- FIG. 13 is a flowchart showing a recording operation by the information recording / reproducing apparatus in the example of the information recording apparatus of the present invention.
- FIG. 14 is a schematic diagram (FIGS. 14 (a) and 14 (b)) conceptually showing the recording requirements according to the present invention, and a graph (FIG. 14 (c)) shown numerically.
- the LO layer track path constituting an example of the “first track” according to the present invention and the L1 layer track constituting an example of the “second track” according to the present invention.
- the opposite method in which the recording direction is opposite to the pass is applied as an example of the recording method.
- this embodiment can also be applied to a parallel system.
- FIG. 1 (a) is a schematic plan view showing the basic structure of an optical disc having a plurality of recording areas according to an embodiment of the information recording medium of the present invention
- FIG. FIG. 2 is a schematic cross-sectional view of FIG. 2 and a schematic conceptual diagram of a recording area structure in the radial direction associated therewith.
- the optical disc 100 is implemented in the recording surface on the disc main body having a diameter of about 12 cm as in the DVD, with the center hole 1 as the center.
- Example A lead-in area 101 or a lead-out area 103, a data area 102, and a middle area 104 are provided.
- a recording layer such as the L0 layer and the L1 layer is laminated on the transparent substrate 106 of the optical disc 100, for example.
- tracks 10 such as a groove track and a land track are alternately provided in a spiral shape or a concentric shape around the center hole 1.
- ECC block 11 is a data management unit in which recorded information can be error-corrected.
- the present invention is not particularly limited to the optical disc having such three areas.
- the lead-in area 101 or the lead-out area 103 and the middle area 104 do not exist, the data structure described below can be constructed. Further, as will be described later, the lead-in area 101 or the lead-out 103 and the middle area 104 may be further subdivided.
- the optical disc 100 according to the present example constitutes an example of first and second recording layers according to the present invention, which will be described later, on a transparent substrate 106, for example.
- the L0 layer and L1 layer are stacked.
- the optical disc 100 according to the present embodiment may be a double-layer single side, that is, a double-layer double side, that is, not limited to a dual layer.
- the optical disc is not limited to an optical disc having two recording layers, and may be a multilayer optical disc having three or more layers.
- FIG. 2 is a graph showing a specific example of the relationship between the address and the radial position in the L0 layer and the L1 layer according to the first recording layer and the second recording layer of the present invention (FIG. 2 (a)).
- FIG. 2 is a graph showing another specific example (FIG. 2 (b)).
- FIG. 2 (a) and Fig. 2 (b) the relationship between the address and the radial position in the LO layer and the L1 layer related to the first recording layer and the second recording layer of the present invention.
- the relationship between the address and the radial position is defined based on the opposite method.
- the opposite method is more specifically described as a recording or reproducing procedure of a two-layer type optical disc.
- an optical pickup of an information recording / reproducing apparatus moves from the inner circumference side toward the outer circumference side. That is, contrary to the movement to the right of the arrow ARO in FIGS. 2 (a) and 2 (b), in the L1 layer, the optical pickup is directed from the outer peripheral side to the inner peripheral side, that is, In this method, recording or reproduction is performed on a two-layer optical disc by moving to the left of the arrow AR1 in FIGS. 2 (a) and 2 (b).
- the LO layer force also has the advantage that the switching time to the L1 layer is shorter compared to the parallel method, so recording of large-capacity content information Has been widely adopted.
- the address is reduced in the address system based on the above-described deposit system.
- the laser beam LB is irradiated from the upper side to the lower side
- the address transition in the LO layer is indicated by a straight line on the upper side
- the address transition in the L1 layer is lower side. It is indicated by a straight line.
- the laser light emitted from the optical pickup is transmitted in the lead-in area 101-0, the data area 102-0, and the middle area.
- the address in the recording area of the optical disc 100 decreases. More specifically, the focal point of the laser beam is the start of the data area 102-0 of the L0 layer whose address is “FFCFFFh” (hexadecimal notation) and the radial position is “24 (mm)”. It is moved from the position (point A in Fig. 2 (a)) toward the outer periphery.
- the focal point of the laser beam is the end position of the data area 102-0 in the L0 layer whose address is “FDD109h” and the radial position is “58. l (mm)” (point B in FIG. 2 (a)). Is moved to The information recorded in the data area 102-0 of the LO layer is recorded or reproduced.
- the address in the recording area of the optical disc 100 decreases as the laser light moves from the outer peripheral side to the inner peripheral side in the middle area 104-1, the data area 102-1 and the lead-out area 103-1. I will do it. More specifically, the focal point of the laser beam is the start position of the data area 102-1 in the L1 layer whose address is “22EF6h” and the radial position is “58.1 (mm)” (FIG. 2). (D) in (a) and move toward the inner circumference. The focal point of the laser beam is moved to the end position (point C in Fig. 2 (a)) of the L1 layer data area 102-1 with an address force of "03000h" and a radial position of "24mm". As a result, the information recorded in the data area 102-1 of the L1 layer is recorded or reproduced.
- the address increases in the address system based on the above-described deposit system.
- the laser beam LB is emitted from the lower side toward the upper side
- the address transition in the L0 layer is indicated by a straight line on the lower side
- the address transition in the L1 layer is upper side. It is indicated by a straight line.
- the laser light emitted from the optical pickup is irradiated with the lead-in area 101-0, the data area 102-0, and the middle area 104.
- the address in the recording area of the optical disc 100 increases as the inner peripheral force moves from 0 to the outer peripheral side. More specifically, the focal point of the laser beam is the start position of the data area 102-0 in the L0 layer whose address is “03000h” and radial position is “24 (mm)” (FIG. 2 (b) It is moved from the A point in the middle toward the outer periphery. Then, it is moved to the end position of data area 102-0 (point B in Fig. 2 (b)) where the focal point address of the laser beam is "22EF6h" and the radial position is "58.1 (mm)" As a result, the information recorded in the data area 102-0 of the L0 layer is recorded or reproduced.
- the address in the recording area of the optical disc 100 increases as the laser light power middle area 104-1, the data area 102-1 and the lead-out area 103-1 are moved from the outer peripheral side to the inner peripheral side. I will do it. More specifically, the data of the L1 layer where the focal point of the laser beam is the address “FDD109h” and the radial position is “58.1 (mm)” first. Move from the starting position of area 102-1 (point D in Fig. 2 (b)) toward the inner circumference. The focal point of the laser beam must be moved to the end position of data area 102-1 (point C in Fig. 2 (b)) whose address is "FFCFFFh" and whose radial position is "24mm". As a result, the information recorded in the data area 102-1 of the L1 layer is recorded or reproduced.
- the value of the address at one radial position in the LO layer according to the first recording layer of the present invention and the value of the point at one radial position in the L1 layer according to the second recording layer of the present invention is in the relationship of bit inversion with each other, that is, in a complement relationship.
- the complement relationship is defined by “Inv (x)”, which is a function indicating complement, as will be described later.
- addresses in the L0 layer and the L1 layer for example, a so-called sector number in which an ECC block address used as a land pre-pit (“LPP”) address is applied. It goes without saying that it may apply.
- FIG. 3 is a schematic diagram (FIG. 3 (a)), conceptually showing dimensional errors held by the L0 layer and the L1 layer, respectively, according to the first recording layer and the second recording layer of the present invention.
- Fig. 3 (b) is a schematic diagram conceptually showing the amount of eccentricity generated based on the bonding error between the L0 layer and the L1 layer.
- FIG. 3 is a schematic diagram conceptually showing the radius of a region irradiated with laser light (irradiation region), that is, the transmitted light diameter, without focusing.
- the LO layer and the L1 layer constituting the two-layer type optical disc each hold a dimensional error as a relative deviation.
- the “dimension error” is the error between the address and the radial position that the LO layer and L1 layer hold independently of each other.
- the absolute radius at the reference address of the LO layer Position and the reference address of the L1 layer This is the amount that occurs as a deviation from the absolute radial position.
- the dimensional error tol includes the radial position of the start position (point A) of the data area 102-0 of the L0 layer whose address is “FFCFFFh” shown in FIG. Is “0300 0h”, and is indicated as the difference from the radial position of the end position (point C) of the data area 102-1 of the L1 layer whose radial position is “24 mm”.
- the allowable range of the dimensional error tol is, for example, within “20 m” in the positive or negative direction in the L0 layer, and for example, in the positive or negative direction in the L1 layer. In the case of “20 m” or less, it means that it is allowed to hold a total of “40 m” for each individual optical disk of the two-layer type.
- the eccentricity ro is the radial position of the start position (point A) of the data area 102-0 of the L0 layer whose address is "FFCFFFh" shown in FIG. Is indicated as the difference from the radius position of the end position (point C) of the data area 102-1 of the L1 layer whose radius position is “24mm”.
- the allowable range of this eccentricity ro is in the L0 layer,
- each of the positive and negative directions is within “20 m”
- in the L1 layer for example, each of the positive and negative directions is within “30 m”. It means that it is allowed to hold only “50 m” in total for each individual.
- the absolute radial position at the reference address of the LO layer can be said to be a value of “90 / z mj in each of the positive direction and the negative direction. It can be said that there is a possibility of fluctuation within the range where the value of “180 m” is maintained.
- transmitted light diameter means that when laser light is irradiated so as to focus on the L1 layer, this laser light is transmitted through the LO layer, but not focused on the LO layer (defocused). It is the radius of the area (irradiation area) irradiated with the laser beam.
- the maximum value of the transmitted light diameter rb is expressed by the following equation (10).
- L is the thickness of the intermediate layer (the layer inserted between the LO layer and L1 layer)
- NA Aperture ratio of optical system
- the function “sin-l” means an inverse function of the function “sin”.
- a value of “34 / ⁇ ⁇ ” may be calculated based on the thickness of the intermediate layer that determines the distance between the LO layer and the L1 layer.
- FIG. Fig. 5 shows the LO when the dimensional error, pasting error (eccentricity), and irradiation position error occurred in the LO layer and L1 layer of the first recording layer and the second recording layer of the present invention.
- FIG. 4 is a schematic plan view showing a positional relationship between one track in the layer and another track corresponding to the one track in the L1 layer.
- FIG. 6 shows a case where at least one of a dimensional error, a pasting error (an eccentricity), and an irradiation position error occurs in the LO layer and the L1 layer according to the first recording layer and the second recording layer of the present invention.
- 4 is a graph showing a specific example of a relationship between an address and a radial position.
- relative deviation As shown in Fig. 5, for example, to meet the recording requirements even if three types of relative deviation occur, it corresponds to the circumference CrO indicated by one address of the LO layer and one address of the L1 layer.
- the positional relationship with the circumference Crl indicated by other addresses may be defined as “relative deviation”, which is a relative deviation that varies at each position of the circumference.
- the maximum relative deviation is determined by the deviation of the radial position between “Ml-b point” on one track of the L1 layer and “M0 —b point” on one track of the L0 layer. A value is shown.
- the deviation of the radial position between the “M1 ⁇ s point” on one track of the L1 layer and the “M0 ⁇ s point” on one track of the L0 layer indicates the minimum relative deviation.
- the radial position “24 mm” of “point A” indicated by the address “X0” in the L0 layer is The relative deviation is indicated by the deviation from the radial position of “C point” indicated by the address “Inv XO” in the LI layer.
- the radius position “58mm” of the “B point” indicated by the address “X” in the L0 layer and the radius position of the “D point” indicated by the address “Inv X” in the L1 layer are different. Relative deviations are shown.
- Figure 7 shows (i) the address (X) in the LO layer related to the first recording layer of the present invention, and (ii) the first point on the LO layer (including the dimensional error and eccentricity) ( Bx point) radius position (R (X)) and half of the ideal point (Dix point) indicated by the ideal address theoretically determined for the L1 layer corresponding to the first point (Bx point) It is a graph showing the relationship with the ideal error (R (X) — Ri (X)), which is the difference from the radial position (Ri (X)).
- the vertical axis shows the difference between the radial position (R (x)) at the first point (point Bx) and the radial position (Ri (x)) at the second point (point Dx) (mm: Mm), and the horizontal axis shows the address in the LO layer.
- the first point (Bx point) and the second point (Dx point) will be described later with reference to FIG.
- the radial position (R (x)) of the first point (point Bx) and the radial position of the second point (point Dx) is defined so that it falls within the range indicated by the gray tolerance area 10 with the address in the LO layer as a variable.
- the allowable region 10 satisfies the following conditional expressions (1) and (2).
- “DEVup (x)” and “DEVlow (x)” in the above formulas (1) and (2) are (i) the radial position “R (x)” at the first point (Bx). And (ii) the difference between the ideal point (D ix point) and the radial position “Ri (x)” corresponding to the first point (Bx point) as a reference (see the dashed line in FIG. 7) It is expressed in consideration of (iii) dimensional error “tol” according to the present invention and (iv) eccentricity “ro” according to the present invention. [0101] Specifically, “DEVup (x)” and “DEVlow (x)” are expressed by the following equations (5) and (6) in addition to the following equations (3) and (4). .
- Ri (x) Rt [ ⁇ Sqr (D0 / 2-a) X ⁇ + (Inv ⁇ - ⁇ xO) C> / ⁇ ]
- a term composed only of alphabets such as "Def” indicates a constant, and a term including "(X)” such as "DEVup (X)” is a rule indicating a variable.
- “Abs (X)” is a function indicating an absolute value.
- “AbsMX (x)” is a function indicating the absolute value of the maximum value of the variable “x”.
- Rt (x) is a function indicating a square root.
- Sqr (x) is a square function.
- Inv (x)” is a function indicating a complement.
- the second point of the L1 layer is “ The radial position of “D point” so as to be within the allowable range shown in the following formulas (la) and (2a). (Radial position of the first point “B”)-(Radial position of the second point “D”) ⁇ 0.195
- the standard error “a” at the radial position of “C point” with the address “003000h” at the end position of the data area of the L1 layer is 0.25 mm.
- FIG. 8 is a conceptual diagram showing the process of calculating the radial position (R (X)) of the first point “Bx point” in the LO layer according to the first recording layer of the present invention (FIG.
- the area "Sr” is obtained by multiplying ⁇ (pi) by the square of "R (x)”.
- the area “SO” is obtained by multiplying ⁇ by the square of “D0Z2”.
- the difference data amount “AS” is obtained by adding a predetermined coefficient “C” to the difference between the address “xO” and the address “x”. Therefore, the following equation (5a) is obtained.
- the radial position of the second point “Dx point” of the L1 layer is not only the relative deviation based on the tolerance region 10, that is, the ideal point “Dix”, but also the dimensional error and It is specified to be within the range including eccentricity.
- the radial position “Ri (x)” (address is “Inv x”) of the ideal point “Dix” is (i) the radial position “D0 / 2—a” (address Can be calculated based on “Inv xO”) and (ii) the difference data amount “ ⁇ S” from the address “Inv x0” to the address ⁇ ⁇ ”.
- FIG. 10 shows, as a general theory, a thick donut-shaped recording area “S1” on the inner peripheral side and a thin donut-shaped recording area “S2” on the outer peripheral side corresponding to a fixed address offset value.
- FIG. 2 is a plan view of an optical disc schematically showing
- FIG. 11 is a sectional view schematically showing the length in the radial direction of the recording area shown in FIG.
- the difference between the radial position of the first point and the radial position of the second point is the difference between the inner peripheral side and the outer peripheral side with the address in the L0 layer as a variable. From one side to the other, it is specified to be within a predetermined range!
- the difference between the radial position of the first point and the radial position of the second point is One force of the outer peripheral side is defined to fall within a predetermined range over the other. Therefore, for example, the address offset value added or subtracted to the address for specifying the position of the L1 layer, determined to reduce the influence of the relative deviation between the L0 layer and the L1 layer on the outer peripheral side. Based on this address when a recording operation is performed by the information recording device. The offset value appropriately satisfies the recording requirement not only on the outer peripheral side but also on the inner peripheral side.
- the present embodiment is an example in which the information recording apparatus according to the present invention is applied to an information recording / reproducing apparatus for an optical disc.
- FIG. 12 is a block diagram showing the basic configuration of the information recording / reproducing apparatus and the host computer in the embodiment of the information recording apparatus of the present invention.
- the information recording / reproducing apparatus 300 has a function of recording record data on the optical disc 100 and a function of reproducing the record data recorded on the optical disc 100.
- the information recording / reproducing apparatus 300 is an apparatus that records information on the optical disc 100 and reads the information recorded on the optical disc 100 under the control of a CPU (Central Processing Unit) 305 for driving.
- a CPU Central Processing Unit
- the information recording / reproducing apparatus 300 includes an optical disc 100, an optical pickup 301, a signal recording / reproducing unit 302, an address detecting unit 303, an address calculating unit 304, a CPU (drive control means) 305, a spindle motor 306, a memory 307, A data input / output control means 308 and a bus 309 are provided.
- the host computer 400 includes a CPU (host control means) 401, a memory 402, an operation control means 403, an operation button 404, a display panel 405, a data input / output control means 406, and a bus 407.
- the host computer 400 includes a CPU (host control means) 401, a memory 402, an operation control means 403, an operation button 404, a display panel 405, a data input / output control means 406, and a bus 407.
- the information recording / reproducing apparatus 300 may be configured to be able to communicate with an external network by housing the host computer 400 provided with communication means such as a modem in the same casing.
- the CPU (host control means) 401 of the host computer 400 provided with communication means such as i-link directly controls the information recording / reproducing apparatus 300 via the data input / output control means 308 and the bus 309. By doing so, you may be able to communicate with an external network.
- the optical pickup 301 performs recording / reproduction on the optical disc 100, and includes a semiconductor laser device and a lens. More specifically, the optical pickup 301 irradiates the optical disc 100 with a light beam such as a laser beam at a first power as a read light during reproduction, and modulates with a second power as a write light at the time of recording. Irradiate while letting go.
- a light beam such as a laser beam at a first power as a read light during reproduction
- a second power as a write light at the time of recording. Irradiate while letting go.
- the signal recording / reproducing means 302 performs recording / reproduction with respect to the optical disc 100 by controlling the optical pickup 301 and the spindle motor 306. More specifically, the signal recording / reproducing means 302 is constituted by, for example, a laser diode driver (LD dryer) and a head amplifier.
- the laser diode driver drives a semiconductor laser (not shown) provided in the optical pickup 301.
- the head amplifier amplifies the output signal of the optical pickup 301, that is, the reflected light of the light beam, and outputs the amplified signal.
- the signal recording / reproducing means 302 determines the optimum laser power by OPC pattern recording and reproduction processing together with a timing generator (not shown) under the control of the CPU 305 during OPC (Optimum Power Control) processing.
- a semiconductor laser (not shown) provided in the optical pickup 301 is driven so as to be able to perform the above.
- the signal recording / reproducing means 302 and the optical pickup 301 constitute an example of the “recording means” according to the present invention.
- the address detection unit 303 also detects an address (address information) in the optical disc 100 for the reproduction signal power output by the signal recording / reproduction means 302, for example, including a pre-format address signal. Further, the address detection unit 303 may be configured to be able to detect, for example, offset information pre-recorded in the control data zone.
- the address calculation unit 304 performs a calculation such as adding or subtracting an address offset value with respect to the detected address.
- the CPU (drive control means) 305 controls the entire information recording / reproducing apparatus 300 by giving instructions to various control means via the bus 309.
- the CPU 305 determines the arrangement of various recording areas based on the address for which the address calculation unit 304 has performed the calculation.
- the signal recording / reproducing means 302 is controlled so as to record various recording information in the various recording areas thus determined.
- software or firmware for operating the CPU 305 is stored in the memory 307.
- the CPU 305 constitutes an example of “control means” according to the present invention.
- the spindle motor 306 rotates and stops the optical disc 100, and operates when accessing the optical disc. More specifically, the spindle motor 306 is configured to rotate and stop the optical disc 100 at a predetermined speed while receiving spindle servo from a servo unit or the like (not shown).
- the memory 307 includes general data processing and OPC in the information recording / reproducing apparatus 300, such as a buffer area for recording / reproducing data and an area used as an intermediate buffer when converted into data used by the signal recording / reproducing means 302. Used in processing.
- the memory 307 has a program for operating as a recorder device, that is, a ROM area in which firmware is stored, a buffer for temporarily storing recording / playback data, a variable necessary for the operation of the firmware program, and the like.
- the RAM area to be stored is configured.
- the offset information such as the offset amount (deviation amount) described above and the address offset value calculated based on the offset amount (deviation amount) is stored (stored) in the memory 307. It may be.
- the data input / output control means 308 controls external data input / output to / from the information recording / reproducing apparatus 300, and stores and retrieves data in / from the data buffer on the memory 307. Connected to the information recording / reproducing apparatus 300 via an interface such as SCSI or ATAPI!
- the drive control command issued from the external host computer 400 (hereinafter referred to as a host as appropriate) is the data input / output control means. It is transmitted to CPU 305 via 308.
- the recording / playback data is also connected to the host combination via the data input / output control means 308. It is sent to and received from Uter 400.
- the CPU (host control means) 401, the memory 402, the data input / output control means 406, and the bus 407 are substantially the same as the corresponding components in the information recording / reproducing apparatus 300. It is.
- the operation control means 403 is for receiving and displaying an operation instruction for the host computer 400.
- the operation control means 403 notifies the CPU 401 of an instruction by the operation button 404, for example, recording or reproduction.
- the CPU 401 transmits a control command (command) to the information recording / reproducing apparatus 300 via the data input / output unit 406 based on the instruction information from the operation control means 403, and the entire information recording / reproducing apparatus 300 is controlled. You may comprise so that it may control.
- the CPU 401 can transmit a command requesting the information recording / reproducing apparatus 300 to transmit the operation state to the host.
- the operating state of the information recording / reproducing apparatus 300 during recording and reproducing can be grasped, so that the CPU 401 can display the operating state of the information recording / reproducing apparatus 300 on the display panel 405 such as a fluorescent tube or LCD via the operation control means 403. Can be output.
- One specific example of using the information recording / reproducing apparatus 300 and the host computer 400 in combination as described above is a household device such as a recorder device that records and reproduces video.
- This recorder device is a device that records video signals from broadcast receiver tuners and external connection jacks on a disc, and outputs the video signals reproduced from the disc to an external display device such as a television.
- the program stored in the memory 402 is executed by the CPU 401 to operate as a recorder device.
- the information recording / reproducing apparatus 300 is a disk drive (hereinafter referred to as a drive as appropriate)
- the host computer 400 is a personal computer workstation.
- the host computer such as a personal computer and the drive are connected via SCSI / ATAPI data input / output control means 308 (406), and the application such as writing software installed in the host computer controls the disk drive. To do.
- FIG. 13 shows the information recording apparatus of the present invention. It is the flowchart which showed the recording operation by the information recording / reproducing apparatus based on an Example.
- the address calculation unit 304 described above determines, for example, whether or not it is possible to perform recording on the L1 layer based on the address of the recording area where information recording is scheduled. (Step S102).
- the recording area of the L0 layer that corresponds to the recording area of the L1 layer and retains a relative deviation is recorded. It is determined under the control of the CPU 305 whether or not the power is already satisfied, that is, whether or not the recording requirement is satisfied (step S103).
- the recording area of the LO layer has been recorded, that is, when the recording requirement is satisfied (step S103: Yes)
- recording is performed on the L1 layer (step S104).
- step S103 if the recording area of this LO layer has not been recorded, that is, if the recording requirement is not satisfied (step S103: No), for example, the information is recorded under the control of the CPU 305.
- the address of the recording area where recording is scheduled is changed and another address is designated (step S105).
- step S102 determines whether recording is not performed on the L1 layer (step S102: No). If the result of determination in step S102 is that recording is not performed on the L1 layer (step S102: No), recording is performed on the L0 layer (step S106).
- the information recording medium for example, a dual-layer DVD-R or DVD + R, or a write-once or rewritable optical disc such as a DVD-RW or DVD + RW.
- the present invention can be applied to, for example, a multiple layer type optical disc such as a three-layer type.
- the present invention can be applied to a large-capacity recording medium such as a disk using a blue laser for recording and reproduction.
- an information recording / reproducing apparatus for additional recording such as one DVD-R recorder or one DVD + R recorder
- the present invention can be applied to an information recording / reproducing apparatus for rewriting such as a DVD-RW recorder or a DVD + RW recorder.
- the present invention can be applied to an information recording / reproducing apparatus for large capacity recording using a blue laser for recording / reproducing.
- the present invention is not limited to the above-described embodiments, but can be appropriately changed within the scope of the claims and the entire specification without departing from the gist or philosophy of the invention that can be read. Media, information recording apparatuses and methods, and computer programs are also included in the technical scope of the present invention.
- the information recording medium, information recording apparatus and method, and computer program for recording control according to the present invention can be used for, for example, a multi-layer optical disk such as a CD or a DVD, and information recording such as a DVD recorder or the like. Available to the device. Further, the present invention can also be used for an information recording apparatus or the like that is mounted on or can be connected to various computer equipment for consumer use or business use.
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JP2006552978A JP4627762B2 (ja) | 2005-01-14 | 2006-01-13 | 情報記録媒体、情報記録装置及び方法、並びに記録制御用のコンピュータプログラム |
EP06711651A EP1837872B9 (en) | 2005-01-14 | 2006-01-13 | Information recording medium, information recording device and method, and computer program for controlling recording |
US11/597,899 US7697390B2 (en) | 2005-01-14 | 2006-01-13 | Efficient recording of information on an information recording medium having a plurality of layers |
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EP (1) | EP1837872B9 (ja) |
JP (1) | JP4627762B2 (ja) |
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CN (1) | CN100481214C (ja) |
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WO (1) | WO2006075696A1 (ja) |
Cited By (1)
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WO2008069435A1 (en) * | 2006-12-05 | 2008-06-12 | Samsung Electronics Co., Ltd. | Multi-layered optical recording medium, address assignment method for multi-layered optical recording medium, apparatus and method of reproducing and method of recording |
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TW201108219A (en) * | 2009-08-17 | 2011-03-01 | Quanta Storage Inc | Writing method of multilayer optiacl disc |
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2006
- 2006-01-13 JP JP2006552978A patent/JP4627762B2/ja active Active
- 2006-01-13 EP EP06711651A patent/EP1837872B9/en active Active
- 2006-01-13 WO PCT/JP2006/300366 patent/WO2006075696A1/ja active Application Filing
- 2006-01-13 TW TW095101337A patent/TWI350538B/zh active
- 2006-01-13 US US11/597,899 patent/US7697390B2/en active Active
- 2006-01-13 CN CNB2006800004805A patent/CN100481214C/zh active Active
- 2006-01-13 KR KR1020067027246A patent/KR100836701B1/ko active IP Right Grant
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Cited By (2)
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WO2008069435A1 (en) * | 2006-12-05 | 2008-06-12 | Samsung Electronics Co., Ltd. | Multi-layered optical recording medium, address assignment method for multi-layered optical recording medium, apparatus and method of reproducing and method of recording |
US7864636B2 (en) | 2006-12-05 | 2011-01-04 | Samsung Electronics Co., Ltd. | Multi-layered optical recording medium, address assignment method for multi-layered optical recording medium, apparatus and method of reproducing and method of recording |
Also Published As
Publication number | Publication date |
---|---|
EP1837872B9 (en) | 2012-07-18 |
EP1837872A1 (en) | 2007-09-26 |
CN100481214C (zh) | 2009-04-22 |
CN1989553A (zh) | 2007-06-27 |
EP1837872B1 (en) | 2012-03-07 |
US20090103407A1 (en) | 2009-04-23 |
JP4627762B2 (ja) | 2011-02-09 |
TWI350538B (en) | 2011-10-11 |
KR20070083390A (ko) | 2007-08-24 |
EP1837872A4 (en) | 2009-01-07 |
JPWO2006075696A1 (ja) | 2008-06-12 |
US7697390B2 (en) | 2010-04-13 |
KR100836701B1 (ko) | 2008-06-10 |
TW200638405A (en) | 2006-11-01 |
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