WO2014128866A1

WO2014128866A1 - Recording medium, recording device and method, and recording/playback device and method

Info

Publication number: WO2014128866A1
Application number: PCT/JP2013/054185
Authority: WO
Inventors: 吉田　昌義; 琢也白戸; 一雄 ▲高▼橋; 小笠原　昌和; 田中　博之; 田切　孝夫
Original assignee: パイオニア株式会社
Priority date: 2013-02-20
Filing date: 2013-02-20
Publication date: 2014-08-28

Abstract

A recording medium (11) is provided with a guide layer (12) and one or more recording layers (13). The guide layer comprises: a first area (12a) having formed thereon a recording track that is configured so as to make it possible to record information using a first laser light having a first wavelength or a second laser light having a second wavelength that is longer than the first wavelength; and a second area (12b) having formed thereon a guide track that is configured for use in tracking during the recording of information on the recording layer. First pre-formatted information is recorded on the recording track using wobble modulation. The track pitch of the recording track is configured so as to correspond to at least the optical diameter of the second laser light. Second pre-formatted information is recorded on the guide track. The track pitch of the guide track is configured so as to correspond to the optical diameter of the first laser light.

Description

Recording medium, recording apparatus and method, and recording / reproducing apparatus and method

The present invention relates to a recording medium such as an optical disk having a large number of recording layers, a recording apparatus and method for recording information on the recording medium, and a recording / reproducing apparatus for reproducing information recorded on or recorded from the recording medium. And the technical field of methods.

As a recording medium having a large number of recording layers, for example, a recording medium having a plurality of recording layers that are actually targets of at least one of a recording operation and a reproducing operation, and a guide layer in which a guide track for tracking is formed (for example, A so-called guide layer separation type optical disc) has been proposed (see Patent Document 1).

Or, for example, the BDXL standard having three or four recording layers has been proposed (see Non-Patent Document 1, especially Section 2.1-Disc outline, Figure 2-2-2 Outline-of Quadruple-Layer-BD-Recordable-disc)

Japanese Patent Application 2012-010085 Japanese Patent Application No. 2012-122413

In a so-called guide layer separation type optical disc, management information relating to recording / reproduction of the optical disc is recorded in any of the recording layers. Management information is sequentially added according to the use of the optical disc. Here, when the management information is recorded on the so-called guide layer separation type optical disc, the guide laser beam for reading the guide track of the guide layer and the recording laser beam for performing the recording operation on the recording layer are recorded on the optical disc. Irradiated.

Then, in order to avoid the influence of the deviation between the optical axis of the guide laser beam and the optical axis of the recording laser beam, when the management information is additionally recorded, a predetermined amount interval is provided from the position where the previous management information was recorded. After that, it is necessary to start appending. For this reason, there is a technical problem that more storage capacity (space) than necessary is required for recording management information. In addition, there is a technical problem that it may take time to search for management information when reproducing the management information recorded at a predetermined interval.

Although it is theoretically possible to stack five or more recording layers having a groove structure as in the technique described in Non-Patent Document 1, it is difficult to stack with high accuracy in practical use. There is a technical problem that it is difficult to increase the capacity.

The present invention has been made in view of the above-described problems, for example, and while avoiding the influence of the optical axis shift of the laser beam while increasing the capacity of the recording medium, it is possible to facilitate the search for management information. An object of the present invention is to propose a recording medium, a recording apparatus and method, and a recording / reproducing apparatus and method.

In order to solve the above problems, a recording medium according to claim 1 is a recording medium including a guide layer in which tracks are formed in advance, and one or more recording layers laminated on the guide layer. The guide layer is configured to be capable of recording information using a first laser beam having a first wavelength or a second laser beam having a second wavelength longer than the first wavelength, and as a part of the track A first area in which recording tracks are formed and a second area in which guide tracks are formed as other parts of the track, which are configured for tracking when information is recorded on the recording layer. And the recording track records first preformat information by wobble modulated by a predetermined method, and the track pitch related to the recording track is the second label. The guide track is recorded with second preformat information, and the track pitch associated with the guide track is the light associated with the first laser beam. It is configured to correspond to the diameter.

In order to solve the above-described problem, the recording apparatus according to claim 7 includes a guide layer in which tracks are formed in advance, and one or more recording layers stacked on the guide layer, and the guide layer Is configured to be capable of recording information using a first laser beam having a first wavelength or a second laser beam having a second wavelength longer than the first wavelength, and a recording track as a part of the track is provided. A first area formed; and a second area configured for tracking when information is recorded on the recording layer and having a guide track as another part of the track, and the recording The first preformat information by wobble modulated by a predetermined method is recorded on the recording track, and the track pitch related to the recording track is smaller than the light diameter related to the second laser beam. The pre-format information is recorded on the guide track, and the track pitch related to the guide track corresponds to the light diameter related to the first laser beam. A recording apparatus for recording information on a recording medium configured as follows: a first light source capable of irradiating the first laser light; a second light source capable of irradiating the second laser light; Recording to record information on the recording layer by controlling the first light source to irradiate the first laser light to the recording layer while controlling the second light source to irradiate the second laser light Means for controlling the first light source or the second light source so as to irradiate the first laser beam or the second laser beam on the first region, and managing information relating to the recorded information Tube to record in one area It comprises an information recording unit.

In order to solve the above-described problem, the recording method according to claim 8 includes a guide layer in which tracks are formed in advance, and one or more recording layers stacked on the guide layer, and the guide layer Is configured to be capable of recording information using a first laser beam having a first wavelength or a second laser beam having a second wavelength longer than the first wavelength, and a recording track as a part of the track is provided. A first area formed; and a second area configured for tracking when information is recorded on the recording layer and having a guide track as another part of the track, and the recording The first preformat information by wobble modulated by a predetermined method is recorded on the recording track, and the track pitch related to the recording track is smaller than the light diameter related to the second laser beam. The pre-format information is recorded on the guide track, and the track pitch related to the guide track corresponds to the light diameter related to the first laser beam. A method of recording information on a recording medium configured as described above, wherein the recording layer is irradiated with the first laser beam while the track is irradiated with the second laser beam, and the recording layer is recorded with information. And a management information recording step of irradiating the first area with the first laser light or the second laser light and recording management information related to the recorded information in the first area. .

In order to solve the above-mentioned problem, the recording / reproducing apparatus according to claim 9 includes a guide layer in which tracks are formed in advance, and one or more recording layers laminated on the guide layer, and the guide The layer is configured to be able to record information using a first laser beam having a first wavelength or a second laser beam having a second wavelength longer than the first wavelength, and a recording track as a part of the track And a second area configured for tracking when information is recorded on the recording layer and having a guide track as another part of the track, and In the recording track, first preformat information by wobble modulated by a predetermined method is recorded, and a track pitch related to the recording track has an optical diameter related to the second laser beam. The pre-format information is recorded on the guide track, and the track pitch related to the guide track corresponds to the light diameter related to the first laser beam. A recording / reproducing apparatus for recording information on a configured recording medium or reproducing information recorded on the recording medium, the first light source capable of irradiating the first laser light, and the second laser light A second light source capable of irradiating the recording layer, and controlling the second light source to irradiate the track with the second laser light, and irradiating the first laser light to the recording layer. Controlling the recording means for recording information on the recording layer, and controlling the first light source or the second light source so as to irradiate the first laser light or the second laser light on the first region. The record Recorded in the recording layer by controlling the first light source so as to irradiate the recording layer with the first laser beam, and the management information recording means for recording the management information related to the recorded information in the first area And reproducing means for reproducing information.

In order to solve the above-mentioned problem, the recording / reproducing method according to claim 10 includes a guide layer in which tracks are formed in advance, and one or more recording layers laminated on the guide layer, and the guide The layer is configured to be able to record information using a first laser beam having a first wavelength or a second laser beam having a second wavelength longer than the first wavelength, and a recording track as a part of the track And a second area configured for tracking when information is recorded on the recording layer and having a guide track as another part of the track, and In the recording track, first preformat information by wobble modulated by a predetermined method is recorded, and the track pitch related to the recording track is the light related to the second laser beam. The second preformat information is recorded on the guide track, and the track pitch associated with the guide track corresponds to the light diameter associated with the first laser beam. A recording / reproducing method for recording information on a recording medium configured as described above or reproducing information recorded on the recording medium, wherein the recording layer is irradiated with the second laser light while the recording layer is irradiated with the second laser light. A recording step of irradiating the first laser beam to record information on the recording layer, and a management relating to the recorded information by irradiating the first laser beam or the second laser beam to the first region. A management information recording step for recording information in the first area; and a reproduction step for reproducing the information recorded on the recording layer by irradiating the recording layer with a first laser beam.

The operation and other advantages of the present invention will be clarified from the embodiments to be described below.

FIG. 3 is a schematic partial enlarged cross-sectional view showing an objective lens for focusing a first beam for guide and a second beam for recording (or reproduction) and an information recording medium in an example. It is a conceptual diagram which shows the concept at the time of recording management information on the optical disk based on an Example. It is a conceptual diagram which shows the concept at the time of recording user information on the optical disk based on an Example. FIG. 3 is a schematic conceptual diagram of a recording area structure in a radial direction of an optical disc according to an example. It is a conceptual diagram which shows the concept of the management information recorded on the optical disk which concerns on an Example (a) and each of a comparative example (b). It is a block diagram which shows the structure of the recording / reproducing apparatus which concerns on an Example. It is a block diagram which shows the structure of the optical pick-up of the recording / reproducing apparatus based on an Example. It is a flowchart which shows the recording / reproducing process based on an Example. It is a flowchart which shows the media information acquisition process which concerns on an Example. It is a flowchart which shows the disk management information acquisition process based on an Example. It is a flowchart which shows the user data recording process which concerns on an Example. It is a flowchart which shows the disk management information generation process which concerns on an Example. It is a flowchart which shows the user data reproduction | regeneration processing based on an Example. It is a flowchart which shows the management information recording process at the time of finalization based on an Example. It is a flowchart which shows the management information recording process which concerns on an Example. It is a block diagram which shows the structure of the reproducing | regenerating apparatus based on an Example. It is a block diagram which shows the structure of the optical pick-up of the reproducing | regenerating apparatus based on an Example. It is a flowchart which shows the reproduction | regeneration processing based on an Example. It is a flowchart which shows the media information and disc management information acquisition process based on an Example. It is a flowchart which shows the user data reproduction | regeneration processing based on an Example.

Hereinafter, embodiments of the recording medium, recording apparatus and method, and recording / reproducing apparatus and method of the present invention will be described.

(recoding media)
The recording medium according to the embodiment includes a guide layer in which tracks are formed in advance, and one or more recording layers stacked on the guide layer. That is, the recording medium according to the embodiment is a so-called guide layer separation type recording medium.

The guide layer uses a first laser beam (for example, blue laser beam) having a first wavelength or a second laser beam (for example, red laser beam) having a second wavelength longer than the first wavelength. A first area on which a recording track configured to record information is formed; and a second area on which a guide track configured for tracking when information is recorded on the recording layer is formed. Yes.

The first preformat information by wobble modulated by a predetermined method is recorded on the recording track formed in the first area of the guide layer. The first preformat information includes various known aspects disclosed in, for example, Non-Patent Document 1 described above (especially, see Section 3.4 Track layout of the Wobbled Grooves (p52) and Section 3.5 ADIP information (p53)). Is applicable.

The track pitch related to the recording track formed in the first region of the guide layer is configured to correspond at least to the light diameter related to the second laser beam. Here, “corresponding to the light diameter related to the second laser beam” means that information can be appropriately recorded on the recording track using the second laser beam. “At least correspondence” means that the track pitch may be wider than the track pitch corresponding to the light diameter of the second laser beam.

The second preformat information is recorded on the guide track formed in the second area of the guide layer. The track pitch related to the guide track is configured to correspond to the light diameter related to the first laser light. For example, the structure of the guide layer disclosed in

Patent Documents

1 and 2 can be applied to the structure of the second region of the guide layer.

As described above, in the so-called guide layer separation type recording medium, management information relating to recording / reproduction of the recording medium is recorded in any of the recording layers. When management information is recorded on a so-called guide layer separation type recording medium, the optical axis of laser light (for example, second laser light) irradiated on the guide layer and the laser light irradiated on the recording layer ( For example, in order to avoid the influence of the deviation of the first laser light) from the optical axis, the current management information is recorded after a predetermined amount interval from the position where the previous management information was recorded. Then, an unnecessarily large storage capacity is required for recording the management information, and it may take time to search for the management information when reproducing the management information.

However, the recording medium according to the present embodiment has a recording track formed in the first region of the guide layer. When information is recorded on the recording track, only one of the first laser beam and the second laser beam has to be used, so that the problem relating to the optical axis deviation does not occur. Therefore, if the management information is recorded on the recording track, the management information can be efficiently recorded and the recorded management information can be searched relatively easily. In addition, since the recording medium is a so-called guide layer separation type, the capacity of the recording medium can be increased relatively easily.

In one aspect of the recording medium according to the embodiment, at least the first preformat information is recorded by a CLV (Constant Linear Velocity) method.

According to this aspect, it is possible to suppress deterioration of the wobble signal due to crosstalk between adjacent tracks, which is very advantageous in practice. Both the first preformat information and the second preformat information may be recorded by the CLV method.

In another aspect of the recording medium according to the embodiment, the format relating to the first area of the guide layer is such that the recording groove relating to the recording track formed in the first area includes at least recording data recorded on the recording layer. This format is formed without being divided into ECC unit lengths.

In another aspect of the recording medium according to the embodiment, the recording track includes a groove track and a land track, and the depth of the groove track is greater than or equal to λ / 8n and less than λ / 6n (where λ is a second value). The wavelength, and n is the substrate refractive index of the recording medium.

According to this aspect, the signal characteristics of the push-pull signal can be improved, and tracking control can be suitably executed.

In another aspect of the recording medium according to the embodiment, the data format related to the data recorded on the recording track of the guide layer using the first laser beam or the second laser beam is the data recorded on the recording layer. The data format is the same.

According to this aspect, it is possible to reduce the processing load of the reproduction circuit mounted on the reproduction apparatus, which is very advantageous in practice.

(Recording device)
The recording apparatus according to the embodiment includes a guide layer in which tracks are formed in advance, and one or more recording layers stacked on the guide layer, and the guide layer has a first laser beam having a first wavelength. Alternatively, a first area where a recording track configured to record information using a second laser beam having a second wavelength longer than the first wavelength is formed, and tracking when information is recorded on the recording layer And a second area formed with a guide track, and the recording track is recorded with the first preformat information by wobble modulated by a predetermined method. The track pitch related to the track is configured to correspond at least to the light diameter related to the second laser beam. The second preformat information is recorded on the guide track, and the guide track is recorded. Track pitch according to is a recording apparatus capable of recording information on a recording medium that is configured to correspond to the optical diameter of the first laser beam. That is, the recording apparatus is a recording apparatus capable of recording information on the recording medium according to the above-described embodiment.

The recording apparatus performs recording while controlling the first light source capable of irradiating the first laser light, the second light source capable of irradiating the second laser light, and the second light source so as to irradiate the track with the second laser light. The first light source is controlled to irradiate the layer with the first laser beam, and the recording means for recording information on the recording layer and the first region of the guide layer are irradiated with the first laser beam or the second laser beam. And a management information recording means for controlling the first light source or the second light source and recording management information related to the recorded information in the first area.

According to the recording apparatus according to the present embodiment, similarly to the recording medium according to the above-described embodiment, while increasing the capacity of the recording medium, it is possible to avoid the influence of the optical axis deviation of the laser beam and to search for management information. Can be easily adjusted. That is, the recording method is a recording method for recording information on the recording medium according to the above-described embodiment.

(Recording method)
The recording method according to the embodiment includes a guide layer in which a track is formed in advance, and one or more recording layers stacked on the guide layer, and the guide layer has a first laser beam having a first wavelength. Alternatively, a first area where a recording track configured to record information using a second laser beam having a second wavelength longer than the first wavelength is formed, and tracking when information is recorded on the recording layer And a second area formed with a guide track, and the recording track is recorded with the first preformat information by wobble modulated by a predetermined method. The track pitch related to the track is configured to correspond at least to the light diameter related to the second laser beam. The second preformat information is recorded on the guide track, and the guide track is recorded. Track pitch according to is a recording method for recording information on a recording medium that is configured to correspond to the optical diameter of the first laser beam.

The recording method includes a recording step of irradiating the first laser beam on the recording layer while irradiating the track of the guide layer with the second laser beam, and recording information on the recording layer, and a first region on the guide layer. A management information recording step of irradiating the first laser beam or the second laser beam to record the management information related to the recorded information in the first area.

According to the recording method according to the present embodiment, similarly to the recording apparatus according to the above-described embodiment, while avoiding the influence of the optical axis shift of the laser beam while increasing the capacity of the recording medium, the search for management information is performed. Can be easily adjusted.

(Recording and playback device)
The recording / reproducing apparatus according to the embodiment includes a guide layer in which tracks are formed in advance, and one or more recording layers stacked on the guide layer, and the guide layer has a first laser having a first wavelength. A first area where a recording track configured to record information using light or a second laser beam having a second wavelength longer than the first wavelength is formed, and information is recorded on the recording layer And a second area in which a guide track configured for tracking is formed. The recording track is recorded with first preformat information in wobble modulated by a predetermined method, The track pitch related to the recording track is configured to correspond at least to the light diameter related to the second laser beam, and the second preformat information is recorded on the guide track. The track pitch related to the recording medium is a recording / reproducing apparatus capable of recording information on a recording medium configured to correspond to the light diameter of the first laser beam, or reproducing information recorded on the recording medium. is there. That is, the recording / reproducing apparatus is a recording / reproducing apparatus that can reproduce the preformat information of the recording medium according to the above-described embodiment, can record information on the recording medium, or can reproduce the recorded information. .

The recording / reproducing apparatus controls the first light source capable of irradiating the first laser light, the second light source capable of irradiating the second laser light, and the second light source so as to irradiate the track of the guide layer with the second laser light. However, the first light source is controlled so as to irradiate the recording layer with the first laser beam, and recording means for recording information on the recording layer, and the first laser beam or the second laser in the first region of the guide layer Management information recording means for controlling the first light source or the second light source to irradiate light, and recording management information related to the recorded information in the first area, and irradiating the recording layer with the first laser light And a reproducing means for controlling the first light source to reproduce the information recorded on the recording layer.

According to the recording / reproducing apparatus according to the present embodiment, similarly to the recording apparatus according to the above-described embodiment, while avoiding the influence of the optical axis deviation of the laser beam while increasing the capacity of the recording medium, the management information The search can be made easy.

(Recording and playback method)
The recording / reproducing method according to the embodiment includes a guide layer in which tracks are formed in advance, and one or more recording layers stacked on the guide layer, and the guide layer has a first laser having a first wavelength. A first area where a recording track configured to record information using light or a second laser beam having a second wavelength longer than the first wavelength is formed, and information is recorded on the recording layer And a second area in which a guide track configured for tracking is formed. The recording track is recorded with first preformat information in wobble modulated by a predetermined method, The track pitch related to the recording track is configured to correspond at least to the light diameter related to the second laser beam, and the second preformat information is recorded on the guide track. The track pitch for recording is a recording / reproducing method for recording information on a recording medium configured to correspond to the light diameter of the first laser beam, or reproducing information recorded on the recording medium. . That is, the recording / reproducing method is a recording / reproducing method for recording information on the recording medium according to the above-described embodiment or reproducing the recorded information.

The recording / reproducing method includes a recording step of irradiating the first laser beam to the recording layer while irradiating the track of the guide layer with the second laser beam, and recording information on the recording layer; A management information recording step of irradiating the first laser beam or the second laser beam to record management information related to the recorded information in the first area, and irradiating the recording layer with the first laser beam, A reproducing step of reproducing the information recorded in

According to the recording / reproducing method according to the present embodiment, similarly to the recording / reproducing apparatus according to the above-described embodiment, while avoiding the influence of the optical axis deviation of the laser beam while increasing the capacity of the recording medium, the management information Can be easily searched.

(recoding media)
An embodiment according to the recording medium of the present invention will be described with reference to FIGS. Here, a so-called guide layer separation type optical disk will be described as an example of the recording medium of the present invention.

In FIG. 1, an optical disk 11 includes a single guide layer 12 and a plurality of recording layers 13 stacked on the guide layer 12.

The guide layer 12 includes a first region 12a in which recording tracks configured to be recordable using blue laser light LB1 (for example, wavelength 405 nm) or red laser light LB2 (for example, wavelength 650 nm), and a plurality of regions And a second region 12b formed with a guide track configured for tracking when information is recorded on each recording layer (see FIGS. 2 and 3). The “blue laser beam LB1” and the “red laser beam LB2” according to the present embodiment are examples of the “first laser beam” and the “second laser beam” according to the present invention, respectively.

1st area | region 12a is arrange | positioned at a part of lead-in area | region of the guide layer 12, as shown to Fig.4 (a). Particularly in the present embodiment, a management information recording area for recording or updating management information to be described later is provided in the first area 12a.

The recording track formed in the first area 12a is composed of, for example, a single spiral groove track. Here, in particular, the format relating to the first area 12a is a format in which the recording groove relating to the recording track is formed without being divided by the ECC unit length relating to the recording data recorded on each of the plurality of recording layers 13. It has become.

In the recording track formed in the first area 12a, first preformat information by wobble modulated by a predetermined method is recorded (see FIG. 4B). The first preformat information is recorded by the CLV method, and the track pitch corresponds to the light diameter of the red laser beam LB2, as will be described later. Therefore, the first preformat information is generated by the blue laser beam LB1. Particularly when information is reproduced, it is possible to suppress deterioration of the wobble signal due to crosstalk between adjacent tracks. Even when the first preformat information is reproduced with the red laser beam LB2, the crosstalk between adjacent tracks is within a practical range.

The track pitch related to the recording track is set to, for example, 0.64 μm so that information can be appropriately recorded on the recording track using the red laser beam LB2 (see FIG. 4B). The depth of the groove track of the recording track is not less than λ / 8n and less than λ / 6n (where λ is the wavelength associated with the red laser beam LB2, and n is the refractive index of the substrate of the optical disc 11). It is configured (see FIG. 4B).

With this configuration, when information is recorded on the recording track using the blue laser beam LB1, the influence of aberration caused by the relatively long distance from the cover layer to the guide layer 12 of the optical disk 11 is achieved. Can be reduced. In addition, information can be recorded by the blue laser light LB1 at a corresponding position on the recording layer while performing tracking control using the return light of the red laser light LB2 from the recording track. These are effects unique to the present invention.

The guide track formed in the second region 12b of the guide layer 12 is configured, for example, by alternately arranging a groove track and a land track for each turn. Here, in particular, the track pitch related to the guide track is configured to correspond to the light diameter (spot) related to the blue laser light LB1. With this configuration, information can be recorded at a relatively high density on each of the plurality of recording layers 13.

For example, a groove notch having a notch structure may be formed in the groove track constituting the guide track. A notch is a mirror surface that is cut out over one track width of a groove track. Land prepits, land notches, and the like may be formed in the land tracks constituting the guide track. In addition, prepits may be appropriately formed for land tracks on which no prepits are formed.

The guide track has a physical structure that carries a recording synchronization clock (or its original timing signal), a tracking error signal (or a signal for generating a tracking error such as its original wobble signal), and a prepit signal. A plurality of servo areas that are respectively provided are arranged.

The physical structure included in the servo area is an example of “second preformat information” according to the present invention. The physical structure may also be configured to be suitable for the CLV system.

The details of the physical configuration of the second region 12b of the guide layer 12 are relatively low in relevance to the essence of the present invention, and are therefore omitted in order to avoid complications. The structure of the guide layer disclosed in

Patent Documents

1 and 2 described above can be applied to the structure of the second region 12b.

The plurality of recording layers 13 are configured to be capable of optically recording and reproducing information independently of each other, for example, 16 layers. More specifically, in each of the plurality of recording layers 13, in an unrecorded state, the track is not formed in advance, and for example, the entire area is a mirror surface or a flat surface without unevenness.

Each of the plurality of recording layers 13 is assigned a recording layer number such as “Layer 0”, “Layer 1”, “Layer 2”,... “Layer n” from the lower layer side in FIG. 4 (a)).

With respect to the optical disk 11, at the time of recording, red laser light LB2 (see FIG. 1) for generating a recording synchronous clock and tracking servo, and blue laser light LB1 (see FIG. 1) for information recording. ) And are irradiated.

More specifically, when recording information on a desired recording layer 13 to be recorded among the plurality of recording layers 13, the red laser beam LB2 is condensed on the guide layer 12, and the blue laser beam LB1 is collected on the desired recording layer. 13 (see FIGS. 1 and 3).

Further, after the recording of information on the desired recording layer 13 is completed, when the management information related to the recorded information is recorded, the blue laser beam LB1 or the red laser beam LB2 The light is condensed on one area 12a (see FIG. 2).

On the other hand, when information recorded on the optical disk 11 is reproduced, the optical disk 11 is simultaneously irradiated with the red laser beam LB2 and the blue laser beam LB1 for information reproduction. During reproduction, it is also possible to use the blue laser beam LB1 as a single light beam for tracking servo and information reproduction (that is, not using the red laser beam LB2).

For example, in the so-called guide layer separation type optical disc disclosed in

Patent Documents

1 and 2, the guide layer is configured as a whole reproduction-only area, and the management information is recorded in at least one of the plurality of recording layers. The For this reason, when the management information is recorded, the management information is recorded by, for example, irradiating one recording layer with, for example, blue laser light while applying tracking servo by irradiating the guide layer with, for example, red laser light. The

Management information is sequentially added according to the use of the optical disk (for example, addition of user data). When management information is added, in order to avoid the effect of deviation between the optical axis of the tracking servo laser beam and the optical axis of the recording laser beam, a predetermined interval from the position where the previous management information was recorded The management information for this time is recorded (see FIG. 5B). For this reason, a storage capacity more than necessary for recording management information is used. In addition, when searching for the recorded management information, the management information acquisition method becomes relatively complicated, and it takes a relatively long time to acquire the management information.

However, in the optical disc 11 according to the present embodiment, the management information is recorded in the first area 12a of the guide layer 12 as described above (see FIG. 5A). When the management information is recorded, since the tracking servo and the management information are recorded by the blue laser beam LB1 or the red laser beam LB2, a problem relating to the optical axis deviation does not occur. Therefore, the current management information can be recorded immediately after the end point of the previously recorded management information (see “U1”, “U2”,... “Un” in FIG. 5A). Also, the recorded management information can be searched relatively easily.

(Recording and playback device)
Next, an embodiment of the recording / reproducing apparatus (and recording apparatus) according to the present invention will be described with reference to FIGS.

In FIG. 6, a recording / reproducing apparatus 101 is configured as a disk drive as an example of a “recording apparatus” and a “recording / reproducing apparatus” according to the present invention, and is connected to a host computer 201. FIG. 6 is a block diagram illustrating the configuration of the recording / reproducing apparatus according to the embodiment.

The recording / reproducing apparatus 101 includes an optical pickup 102, a signal recording / reproducing means 103, a spindle motor 104, a bus 106, a CPU (drive control unit) 111, a memory 112, and a data input / output unit 113.

Here, the optical pickup 102 will be described with reference to FIG. FIG. 7 is a block diagram illustrating the configuration of the optical pickup according to the embodiment.

7, the optical pickup 102 includes a light source LD1 that is a red laser diode and a light source LD2 that is a blue laser diode. The red laser beam LB2 is emitted from the light source LD1, and the blue laser beam LB1 is emitted from the light source LD2.

The red laser beam LB2 emitted from the light source LD1 is condensed on the guide layer 12 of the optical disc 11 through a deflection beam splitter (PBS), a quarter-wave plate (1/4 WP), an objective lens 102L, and the like. . The reflected light of the red laser beam LB2 from the guide layer 12 is incident on the light receiving element PD1 through the objective lens 102L, the quarter wavelength plate, the deflection beam splitter, and the like.

The blue laser beam LB1 emitted from the light source LD2 is recorded or reproduced among the plurality of recording layers 13 of the optical disc 11 through a deflection beam splitter (PBS), a quarter-wave plate, an objective lens 102L, and the like. Is condensed on a desired recording layer. The reflected light of the blue laser beam LB1 is incident on the light receiving element PD2 via the objective lens 102L, a quarter-wave plate, a deflection beam splitter, and the like.

The light receiving elements PD1 and PD2 are typically light receiving elements such as a two-part or four-part CCD.

Returning to FIG. 6 again, the host computer 201 includes an operation / display control unit 202, operation buttons 203, a display panel 204, a bus 206, a CPU 211, a memory 212, and a data input / output control unit 213. During recording, data to be recorded is input from the data input / output control unit 213 to the recording / reproducing apparatus 101, and during reproduction, data reproduced from the recording / reproducing apparatus 101 is output via the data input / output control unit 213. It is configured.

The memory 112 and the memory 212 are (i) a computer program for controlling each element such as the CPU 111 in the recording / reproducing apparatus 101 and each element such as the CPU 211 in the host computer 201 so that a recording / reproducing operation described later is performed, And (ii) various data such as control data, in-process data, and processed data necessary for the recording / reproducing operation are appropriately used for temporarily or permanently storing the data via the bus 106, the bus 206, and the like.

When user data is recorded on the optical disc 11, the optical system (see FIG. 7) for irradiating the blue laser beam LB1 and the red laser beam LB2 is fixed, and thus formed by the blue laser beam LB1 and the red laser beam LB2, respectively. The positional relationship between the light spots is also fixed. Therefore, if a guide operation such as tracking servo is performed for the position of the red laser beam LB2 (that is, the position of the light spot on the guide track formed thereby), the blue laser beam LB1 (that is, the laser beam LB1 is formed thereby). (The position of the light spot on the recording layer to be recorded) is also guided with reproducibility. In other words, it is possible to track or guide the blue laser beam LB1 on the recording layer on which the track does not exist by using the red laser beam LB2 on the guide track that exists in advance (so-called master-slave method).

On the other hand, when the optical disk 11 is reproduced, the optical pickup 102 and the signal recording / reproducing means 103 in the recording / reproducing apparatus 101 receive the DPD ( A tracking error signal is generated by a tracking method (differential phase detector: phase difference detection), for example, a data signal is generated as a signal for the total light amount.

Next, recording / reproducing processing according to the recording / reproducing apparatus configured as described above will be described with reference to the flowcharts of FIGS.

In FIG. 8, first, after the optical disc 11 is mounted on the recording / reproducing apparatus 101 (step S1), media information acquisition processing for acquiring media information related to the optical disc 11 is performed (step S2).

Here, the media information acquisition process will be described with reference to the flowchart of FIG. The media information is preformatted in advance in a predetermined format.

In FIG. 9, first, the CPU 111 of the recording / reproducing apparatus 101 controls the optical pickup 102 via the signal recording / reproducing means 103 so as to irradiate and collect the red laser beam LB2 on the guide layer 12 (step). S201).

Subsequently, the CPU 111 controls the optical pickup 102 via the signal recording / reproducing means 103 so that the red laser beam LB2 reaches a predetermined media information area address in the guide layer 12 (step S202).

The CPU 111 controls the signal recording / reproducing means 103 so as to acquire the media information related to the optical disc 11 after the red laser beam LB2 reaches a predetermined media information area address (step S203). The acquired media information relating to the optical disc 11 is transmitted to the host computer 201 via the data input / output control means 113 of the recording / reproducing apparatus 101.

Returning to FIG. 8 again, after the media information acquisition process (step S2) is completed, the disk from which the management information recorded in the management information recording area (see FIG. 5A) of the first area 12a of the guide layer 12 is acquired. A management information acquisition process is performed (step S3).

Here, the disk management information acquisition process will be described with reference to the flowchart of FIG.

In FIG. 10, first, the CPU 111 of the recording / reproducing apparatus 101 controls the optical pickup 102 via the signal recording / reproducing means 103 so as to irradiate and collect the blue laser beam LB1 on the guide layer 12 (step). S301).

Subsequently, the CPU 111 controls the optical pickup 102 via the signal recording / reproducing means 103 so that the blue laser beam LB1 moves to the address corresponding to the head of the management information recording area of the guide layer 12 (step S302). .

Subsequently, the CPU 111 searches for the end of the recorded track while referring to the recorded RF signal obtained by the reflected light from the guide layer 12 of the blue laser beam LB1 (step S303). Subsequently, the CPU 111 searches for the recording position of the latest disk management information (step S304).

Next, the CPU 111 controls the signal recording / reproducing means 103 so as to acquire the disc management information after the blue laser beam LB1 reaches an address having the latest disc management information (step S305). The acquired disc management information is transmitted to the host computer 201 via the data input / output control means 113 of the recording / reproducing apparatus 101.

Returning to FIG. 8 again, after the disc management information acquisition process (step S3) is completed, the CPU 111 of the recording / reproducing apparatus 101 determines whether or not the operation requested by the host computer 201 is a recording operation (step). S4).

If it is determined that the recording operation is being performed (step S4: Yes), the CPU 111 performs user data recording (step S5). On the other hand, when it is determined that the recording operation is not performed (step S4: No), the CPU 111 performs a process of step S6 described later.

Here, the user data recording process will be described with reference to the flowchart of FIG.

In FIG. 11, first, the CPU 111 of the recording / reproducing apparatus 101 determines whether or not recording is performed on a track in which disk management information already exists (step S501). When it is determined that the recording is on a track in which no disc management information exists (step S501: No), the CPU 111 generates disc management information (step S20) (details will be described later).

On the other hand, if it is determined that the recording is on the track in which the disc management information already exists (step S501: Yes), the CPU 111 irradiates the red laser beam LB2 onto the guide layer 12 and collects the signal. The optical pickup 102 is controlled via the recording / reproducing means 103 (step S502).

Subsequently, the CPU 111 controls the optical pickup 102 via the signal recording / reproducing means 103 so that the red laser beam LB2 moves to a position on the guide layer 12 corresponding to the recording start address in the recording layer to be recorded. (Step S503).

Next, the CPU 111 controls the optical pickup 102 via the signal recording / reproducing means 103 so as to irradiate and collect the blue laser beam LB1 on the recording layer to be recorded (step S504).

Next, the CPU 111 sets the red laser beam LB2 to the “PLAY” state (that is, starts tracking servo based on the reflected light of the red laser beam LB2) (step S505). Subsequently, the CPU 111 determines whether or not the track header start point has been reached while referring to the reproduction signal output from the light receiving element PD1 that has received the reflected light of the red laser beam LB2 (step S506).

When it is determined that the track header start point has not been reached (step S506: No), the CPU 111 performs the process of step S506. On the other hand, when it is determined that the track header start point has been reached (step S506: Yes), the CPU 111 records the track header with the blue laser beam LB1 while applying the tracking servo based on the reflected light of the red laser beam LB2. As described above, the optical pickup 102 is controlled via the signal recording / reproducing means 103 (step S507).

Next, the CPU 111 determines whether or not the user data recording start point has been reached (step S508). When it is determined that the user data recording start point has not been reached (step S508: No), the CPU 111 performs the process of step S508. On the other hand, when it is determined that the user data recording start point has been reached (step S508: Yes), the CPU 111 controls the optical pickup 102 via the signal recording / reproducing means 103 so as to record predetermined user data. (Step S509).

Next, the CPU 111 determines whether or not a predetermined user data recording end point has been reached (step S510). When it is determined that the user data recording end point has not been reached (step S510: No), the CPU 111 performs the process of step S510.

On the other hand, when it is determined that the user data recording end point has been reached (step S510: Yes), the CPU 111 passes the optical pickup 102 via the signal recording / reproducing means 103 so as to end the recording operation of the blue laser beam LB1. Is controlled (step S511). Subsequently, the CPU 111 updates the management information stored in the memory 112 (step S512).

Next, disk management information generation processing will be described with reference to the flowchart of FIG.

In FIG. 12, the CPU 111 of the recording / reproducing apparatus 101 determines whether or not the command from the host computer 201 relates to the generation of the first track management information (step S2001). When it is determined that the command relates to generation of the first track management information (that is, there is no management information related to the first track) (step S2001: Yes), the CPU 111 determines the user data recording start point, The first track header start point is calculated using the radial position, the radial width of the track header area, and the track pitch as parameters (step S2002).

When it is determined that the command is not related to the generation of the first track management information (step S2001: No), the CPU 111 determines whether the command from the host computer 201 is related to the generation of the second track management information ( Step S2003).

When it is determined that the command is related to the generation of the second track management information (step S2003: Yes), the CPU 111 determines the user data recording start point, the radial position of the point, the radial width of the track header area, and the track pitch. Is used as a parameter to calculate the second track header start point (step S2004).

Subsequently, the CPU 111 calculates the first track user data recording end point by using the calculated second track header start point, the radial position of the point, the radial width of the track boundary area, and the track pitch as parameters (step). S2005).

When it is determined that the command is not related to the generation of the second track management information (step S2001: No), the CPU 111 determines whether the command from the host computer 201 is related to the generation of the third track management information. The CPU 111 sequentially performs such processing.

After the processing related to the (n−1) th track is completed, the CPU 111 determines whether or not the command from the host computer 201 relates to the generation of the nth track management information (step S2006).

When it is determined that the command relates to the generation of the nth track management information (step S2006: Yes), the CPU 111 determines the user data recording start point, the radial position of the point, the radial width of the track header area, and the track pitch. Is used as a parameter to calculate the nth track header start point (step S2007).

Subsequently, the CPU 111 sets the (n-1) th track user data recording end point using the calculated nth track header start point, the radial position of the point, the radial width of the track boundary area, and the track pitch as parameters. Calculation is performed (step S2008).

When it is determined that the command is not related to the generation of the nth track management information (step S2001: No), or after the process of step S2008, the CPU 111 updates the disk management information stored in the memory (step S2008). S2009).

Returning to FIG. 8 again, if it is determined in step S4 that the recording operation is not performed (step S4: No), or after the user data recording process (step S5) is completed, the CPU 111 makes a request by the host computer 201. It is determined whether or not the operation being performed is a reproduction operation (step S6).

When it is determined that the operation is a reproduction operation (step S6: Yes), the CPU 111 performs a user data reproduction process (step S7).

Here, the user data reproduction process will be described with reference to the flowchart of FIG.

In FIG. 13, first, the CPU 111 of the recording / reproducing apparatus 101 controls the optical pickup 102 via the signal recording / reproducing means 103 so as to irradiate and collect the red laser beam LB2 on the guide layer 12 (step). S701).

Next, the CPU 111 passes through the signal recording / reproducing unit 103 so that the red laser beam LB2 moves to a position on the guide layer 12 corresponding to the reproduction start address related to desired data in the recording layer to be reproduced. Then, the optical pickup 102 is controlled (step S702).

Next, the CPU 111 controls the optical pickup 102 via the signal recording / reproducing means 103 so as to irradiate and collect the blue laser beam LB1 on the recording layer to be reproduced (step S703).

Next, the CPU 111 switches the light from the tracking servo based on the reflected light of the red laser light LB2 to the DPD tracking servo based on the DPD tracking method based on the reflected light of the blue laser light LB1, via the signal recording / reproducing means 103. The pickup 102 is controlled (step S704).

Next, the optical pickup 102 is controlled via the signal recording / reproducing means 103 so that the blue laser beam LB1 moves to the reproduction start point (step S705). Subsequently, the CPU 111 sets the blue laser beam LB1 to the “PLAY” state (step S706) and controls the signal recording / reproducing unit 103 to reproduce desired data based on the reflected light of the blue laser beam LB1 (step S706). Step S707).

Next, the CPU 111 determines whether or not the reproduction of the desired data has been completed (step S708). When it is determined that the reproduction of the desired data has not ended (step S708: No), the CPU 111 performs the process of step S708. On the other hand, when it is determined that the reproduction of the desired data has been completed (step S708: Yes), the CPU 111 ends the user data reproduction process.

Returning again to FIG. 8, when it is determined in step S6 that the reproduction operation is not performed (step S6: No), or after the user data reproduction process (step S7) is completed, the CPU 111 receives the optical disk 11 from the host computer 201. It is determined whether or not there has been a request for finalization processing (step S8).

When it is determined that there is a request for finalization processing (step S8: Yes), the CPU 111 performs management information recording processing (that is, finalization processing) (step S9).
Here, the management information recording process will be described with reference to the flowchart of FIG.

In FIG. 14, first, the CPU 111 of the recording / reproducing apparatus 101 controls the optical pickup 102 via the signal recording / reproducing means 103 so as to irradiate and collect the red laser beam LB2 on the guide layer 12 (step). S901).

Subsequently, the CPU 111 passes the optical pickup 102 via the signal recording / reproducing means 103 so that the red laser beam LB2 moves to a position on the guide layer 12 corresponding to the management information recording start address in the recording layer to be recorded. Is controlled (step S902).

Next, the CPU 111 controls the optical pickup 102 via the signal recording / reproducing means 103 so as to irradiate and collect the blue laser beam LB1 on the recording layer to be recorded (step S903).

Next, the CPU 111 sets the red laser beam LB2 to the “PLAY” state (step S904). Subsequently, the CPU 111 determines whether or not the management information recording start point has been reached with reference to the reproduction signal output from the light receiving element PD1 that has received the reflected light of the red laser beam LB2 (step S905).

When it is determined that the management information recording start point is not reached (step S905: No), the CPU 111 performs the process of step S905. On the other hand, if it is determined that the management information recording start point has been reached (step S905: Yes), the CPU 111 records management information with the blue laser beam LB1 while applying tracking servo based on the reflected light of the red laser beam LB2. Thus, the optical pickup 102 is controlled via the signal recording / reproducing means 103 (step S906).

Next, the CPU 111 determines whether or not the management information recording end point has been reached (step S907). When it is determined that the management information recording end point has not been reached (step S907: No), the CPU 111 performs the process of step S907. On the other hand, when it is determined that the management information recording end point has been reached (step S907: Yes), the CPU 111 passes the optical pickup 102 via the signal recording / reproducing means 103 so as to end the recording operation of the blue laser beam LB1. Is controlled (step S908).

Returning to FIG. 8 again, when it is determined in step S8 that the finalizing process is not performed (step S8: No), the CPU 111 determines whether or not the host computer 201 has requested to eject the optical disk 11 (step S9).

When it is determined that there is no eject request (step S10: No), the CPU 111 performs the process of step S6. On the other hand, when it is determined that there is an ejection request (step S10: Yes), the CPU 111 uses the management information stored in the memory 112 as the management information recording area (that is, the first area 12a) of the guide layer 12 of the optical disc 11. ), The optical pickup 102 is controlled via the signal recording / reproducing means 103 (step S11). After the management information is recorded, the CPU 111 performs a predetermined eject operation (step S12).

Here, the management information recording process will be described with reference to the flowchart of FIG.

In FIG. 15, first, the CPU 111 of the recording / reproducing apparatus 101 controls the optical pickup 102 via the signal recording / reproducing means 103 so as to irradiate and collect the blue laser light LB1 on the guide layer 12 (step). S1101).

Subsequently, the CPU 111 searches the head of the disc management information recording area in the first area 12a of the guide layer 12 while referring to the reproduction signal output from the PD 2 that has received the reflected light of the blue laser light LB1 (step S1102). ).

Next, the CPU 111 opens the tracking servo, sends the slider to the outer peripheral side of the optical disc 11, and searches for the end of the recorded area of the disc management information by the RF search via the signal recording / reproducing means 103. Then, the optical pickup 102 is controlled (step S1103).

Next, the CPU 111 determines whether or not the end address of the recorded area has been reached (step S1104). When it is determined that the end address of the recorded area has not been reached (step S1104: No), the CPU 111 performs the process of step S1104.

On the other hand, when it is determined that the end address of the recorded area has been reached (step S1104: Yes), the CPU 111 performs optical pickup via the signal recording / reproducing means 103 so as to record the management information with the blue laser beam LB1. 102 is controlled (step S1105).

Next, the CPU 111 determines whether or not the recording of management information has been completed (step S1106). When it is determined that the recording of management information has not ended (step S1106: No), the CPU 111 performs the process of step S1106. On the other hand, if it is determined that the recording of the management information has ended (step S1106: Yes), the CPU 111 moves the optical pickup 102 through the signal recording / reproducing means 103 so as to end the recording operation of the blue laser beam LB1. Control is performed (step S1107).

(Playback device)
Next, an example of a reproduction (dedicated) device will be described with reference to FIGS.

In FIG. 16, the playback device 301 is connected to the host computer 201. The reproduction apparatus 301 includes an optical pickup 302, a signal reproduction unit 303, a spindle motor 304, a bus 306, a CPU (drive control unit) 311, a memory 312 and a data input / output unit 313.

The memory 312 includes (i) a computer program for controlling each element such as the CPU 111 in the playback device 301 so that the playback operation is performed, and (ii) control data, in-process data, and processed that are necessary for the playback operation. Various kinds of data such as data are appropriately used for temporarily or permanently storing the data via the bus 306 or the like.

Here, the optical pickup 302 will be described with reference to FIG.

In FIG. 17, an optical pickup 302 includes a light source LD that is a blue laser diode and a light receiving element such as a quadrant CCD. The light beam emitted from the light source LD is condensed on a recording layer to be reproduced among the plurality of recording layers 13 of the optical disc 11 through a deflecting beam splitter (PBS), a quarter-wave plate, an objective lens, and the like. Is done. The reflected light of the light beam is incident on the light receiving element through an objective lens, a quarter wave plate, a deflection beam splitter, and the like.

Next, playback processing according to the playback apparatus configured as described above will be described with reference to the flowcharts of FIGS.

In FIG. 18, first, the CPU 311 of the playback apparatus 301 performs an acquisition process of acquiring media information and disk management information related to the optical disk 11 after the optical disk 11 is mounted on the playback apparatus 301 (step S31). Step S32).

Here, the acquisition process will be described with reference to the flowchart of FIG.

In FIG. 19, first, the CPU 311 of the reproducing apparatus 301 reproduces the signal so that the blue laser light emitted from the light source LD is applied to “Layer 1” of the plurality of recording layers 13 of the optical disk 11 and condensed. The optical pickup 302 is controlled via the means 303.

The CPU 311 reproduces the signal so that the blue laser light acquires the media information and the disc management information related to the optical disc 11 after reaching the management information recording area (typically in the lead-in area of the recording layer 13). The means 303 is controlled (step S3201).

Here, the media information is recorded in advance as, for example, a preformat related to the guide layer 12 of the optical disc 11, and is recorded in a predetermined format on the predetermined recording layer 13 of the optical disc 11 during the finalizing operation by the recording / reproducing apparatus described above. It may be recorded. Similarly, the disc management information may be generated by the recording / reproducing apparatus described above and recorded in a predetermined format on the predetermined recording layer 13 of the optical disc 11 at the time of finalizing operation.

Note that the acquired media information and disc management information relating to the optical disc 11 are transmitted to the host computer 201 via the data input / output control means 313 of the playback device 301.

18 again, the CPU 311 determines whether or not there has been a reproduction request for the optical disk 11 from the host computer 201 (step S33). When it is determined that there is a reproduction request (step S33: Yes), the CPU 311 performs a user data reproduction process (step S34).

In FIG. 20, first, the CPU 311 of the reproducing apparatus 301 uses the signal reproducing means 303 to irradiate and collect the blue laser light emitted from the light source LD onto the desired recording layer. The pickup 302 is controlled. Subsequently, the CPU 311 performs DPD tracking servo by the DPD tracking method based on the reflected light of the blue laser light (step S3401).

Next, the CPU 311 controls the optical pickup 302 via the signal reproduction means 303 so that the blue laser light moves to the reproduction start point (step S3402). Subsequently, the CPU 311 sets the blue laser light to the “PLAY” state (step S3403), and controls the signal reproduction means 303 to reproduce desired data based on the reflected light of the blue laser light (step S3404). .

Next, the CPU 311 determines whether or not the reproduction of desired data has been completed (step S3405). When it is determined that the reproduction of the desired data has not ended (step S3405: No), the CPU 311 performs the process of step S3405. On the other hand, when it is determined that the reproduction of the desired data is finished (step S3405: Yes), the CPU 311 finishes the user data reproduction process.

Referring back to FIG. 18 again, if it is determined in step S33 that the reproduction operation is not performed (step S33: No), the CPU 311 determines whether or not the host computer 201 has requested ejection of the optical disc 11 (step S35).

When it is determined that there is no eject request (step S35: No), the CPU 311 performs the process of step S33. On the other hand, when it is determined that there is an ejection request (step S35: Yes), the CPU 311 performs a predetermined ejection operation (step S36).

The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit or concept of the invention that can be read from the claims and the entire specification. The apparatus and method, and the recording / reproducing apparatus and method are also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 11 ... Optical disk, 12 ... Guide layer, 13 ... Recording layer, 101 ... Recording / reproducing apparatus, 102, 302 ... Optical pick-up, 103 ... Signal recording / reproducing means, 104, 304 ... Spindle motor, 111, 211, 311 ... CPU, 112 , 212, 312 ... memory, 113, 213, 313 ... data input / output control means, 201 ... host computer, 301 ... reproduction device, 303 ... signal reproduction means, LD1, LD2 ... light source

Claims

A recording medium comprising a guide layer in which a track is formed in advance, and one or more recording layers laminated on the guide layer,
The guide layer is
Information recording is possible using a first laser beam having a first wavelength or a second laser beam having a second wavelength longer than the first wavelength, and a recording track is formed as a part of the track. A first region;
Configured for tracking when information is recorded on the recording layer, and a second region in which a guide track as another part of the track is formed;
Have
In the recording track, the first preformat information by wobble modulated by a predetermined method is recorded,
The track pitch related to the recording track is configured to correspond at least to the light diameter related to the second laser light,
Second guide format information is recorded on the guide track,
The recording medium according to claim 1, wherein a track pitch related to the guide track is configured to correspond to a light diameter related to the first laser light.
2. The recording medium according to claim 1, wherein at least the first preformat information is recorded by a CLV method.
The recording medium according to claim 1, wherein the first preformat information and the second preformat information are recorded by a CLV method.
The format related to the first area is a format in which the recording groove related to the recording track is formed without being divided at least by the ECC unit length related to the recording data recorded in the recording layer. The recording medium according to claim 1.
The recording track includes a groove track and a land track,
The depth of the groove track is not less than λ / 8n and less than λ / 6n (where λ is the second wavelength and n is the substrate refractive index of the recording medium). The recording medium described.
A data format related to data recorded on the recording track using the first laser light or the second laser light is the same as a data format related to data recorded on the recording layer. The recording medium according to claim 1.
A guide layer in which a track is formed in advance, and one or more recording layers laminated on the guide layer, wherein the guide layer has a first laser beam having a first wavelength or the first wavelength. Information is recorded using a second laser beam having a long second wavelength, and when information is recorded on the recording layer and the first area where a recording track as a part of the track is formed. And a second region in which a guide track is formed as another part of the track, and the recording track has a first wobble modulated by a predetermined method. Preformat information is recorded, and a track pitch related to the recording track is configured to correspond at least to a light diameter related to the second laser beam, and the guide track Is a recording apparatus that records second preformat information and records information on a recording medium configured such that the track pitch of the guide track corresponds to the light diameter of the first laser beam. There,
A first light source capable of irradiating the first laser beam;
A second light source capable of irradiating the second laser light;
While controlling the second light source to irradiate the track with the second laser light, the first light source is controlled to irradiate the recording layer with the first laser light, and information is recorded on the recording layer. Recording means for recording,
Control the first light source or the second light source to irradiate the first laser beam or the second laser beam to the first region, and manage information related to the recorded information in the first region. Management information recording means for recording;
A recording apparatus comprising:
A guide layer in which a track is formed in advance, and one or more recording layers laminated on the guide layer, wherein the guide layer has a first laser beam having a first wavelength or the first wavelength. Information is recorded using a second laser beam having a long second wavelength, and when information is recorded on the recording layer and the first area where a recording track as a part of the track is formed. And a second region in which a guide track is formed as another part of the track, and the recording track has a first wobble modulated by a predetermined method. Preformat information is recorded, and a track pitch related to the recording track is configured to correspond at least to a light diameter related to the second laser beam, and the guide track Is a recording method in which second preformat information is recorded, and the track pitch associated with the guide track is recorded on a recording medium configured to correspond to the light diameter associated with the first laser beam. There,
A recording step of irradiating the recording layer with the first laser beam while irradiating the second laser beam on the track, and recording information on the recording layer;
A management information recording step of irradiating the first region with the first laser beam or the second laser beam and recording management information relating to the recorded information in the first region;
A recording method comprising:
A guide layer in which a track is formed in advance, and one or more recording layers laminated on the guide layer, wherein the guide layer has a first laser beam having a first wavelength or the first wavelength. Information is recorded using a second laser beam having a long second wavelength, and when information is recorded on the recording layer and the first area where a recording track as a part of the track is formed. And a second region in which a guide track is formed as another part of the track, and the recording track has a first wobble modulated by a predetermined method. Preformat information is recorded, and a track pitch related to the recording track is configured to correspond at least to a light diameter related to the second laser beam, and the guide track The second preformat information is recorded, and the track pitch associated with the guide track records information on a recording medium configured to correspond to the light diameter associated with the first laser beam, or A recording / reproducing apparatus for reproducing information recorded on a recording medium,
A first light source capable of irradiating the first laser beam;
A second light source capable of irradiating the second laser light;
While controlling the second light source to irradiate the track with the second laser light, the first light source is controlled to irradiate the recording layer with the first laser light, and information is recorded on the recording layer. Recording means for recording,
Control the first light source or the second light source to irradiate the first laser beam or the second laser beam to the first region, and manage information related to the recorded information in the first region. Management information recording means for recording;
Reproducing means for reproducing the information recorded on the recording layer by controlling the first light source so as to irradiate the recording layer with a first laser beam;
A recording / reproducing apparatus comprising:
A guide layer in which a track is formed in advance, and one or more recording layers laminated on the guide layer, wherein the guide layer has a first laser beam having a first wavelength or the first wavelength. Information is recorded using a second laser beam having a long second wavelength, and when information is recorded on the recording layer and the first area where a recording track as a part of the track is formed. And a second region in which a guide track is formed as another part of the track, and the recording track has a first wobble modulated by a predetermined method. Preformat information is recorded, and a track pitch related to the recording track is configured to correspond at least to a light diameter related to the second laser beam, and the guide track The second preformat information is recorded, and the track pitch associated with the guide track records information on a recording medium configured to correspond to the light diameter associated with the first laser beam, or A recording / reproducing method for reproducing information recorded on a recording medium,
A recording step of irradiating the recording layer with the first laser beam while irradiating the second laser beam on the track, and recording information on the recording layer;
A management information recording step of irradiating the first area with the first laser light or the second laser light and recording management information relating to the recorded information in the first area;
A reproducing step of reproducing the information recorded in the recording layer by irradiating the recording layer with a first laser beam;
A recording / reproducing method comprising: