JP2006190480A - Information recording medium, and device and method for recording information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform efficient trial writing and to efficiently record information with respect to each recording layer of a multilayered information recording medium. <P>SOLUTION: The disk-shaped information recording medium is provided with a first recording layer (L0 layer) having (I) a first test writing area (101P-1) for writing first test writing information used for laser beam calibration on trial along a first track path (TP1) directed from an inner peripheral side to an outer peripheral side, and (II) a first recording area for recording first recording information along the first track path (TP1) in this order from the inner peripheral side. The medium is further provided with a second recording layer (L1 layer) having (I) a second test writing area (101P-2) for writing second test writing information for laser beam calibration on trial along a second track path (TP2) directed from the outer peripheral side to the inner peripheral side, and (II) a second recording area for recording second recording information along the second track path (TP2) in this order from the inner peripheral side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technical field of an information recording medium such as a DVD, and an information recording apparatus and method such as a DVD recorder.

  For example, in an information recording medium such as a CD and a DVD, as described in Patent Documents 1 and 2, etc., a multilayer type, dual layer or multiple layer type optical disc in which a plurality of recording layers are laminated on the same substrate. Etc. are also being developed. In an information recording apparatus such as a CD recorder for recording such a two-layer type optical disc, a recording layer located closest to the laser light irradiation side (referred to as “L0 layer” in this application) By recording the laser beam for recording on the L0 layer, information is recorded on the L0 layer by an irreversible change recording method such as heating or a rewritable method, and the laser beam irradiation side through the L0 layer or the like Irreversible change of information on the L1 layer by heating or the like by condensing the laser beam on a recording layer (referred to as “L1 layer” in this application as appropriate) located on the far side of the L0 layer as viewed from Recording is performed by a recording method or a rewritable method.

  Also, in this type of optical disc, the optimum power in the recording power is set by OPC (Optimum Power Calibration) processing according to the type of optical disc, the type of information recording / reproducing apparatus, the recording speed, and the like. That is, recording power calibration is performed. Thereby, it is possible to realize an appropriate recording operation corresponding to variations in characteristics of the information recording surface of the optical disc. For example, when an optical disc is loaded and a write command is input, the light intensity is sequentially switched and data for trial writing is recorded in the OPC area, so-called trial writing processing is executed. In particular, Patent Document 1 discloses a technique in which an OPC area is provided in each of two recording layers, and an OPC process is performed on each of these two layers.

JP 2000-31346 A Japanese Patent Laid-Open No. 2001-23237

  However, in such a two-layer information recording medium, for example, a “parallel system” in which the direction of the track path is the same between two recording layers, a series of content information such as a movie, When recording is continuously performed on one recording layer, at the time of recording, the optical pickup that has reached the outermost periphery of the disk after the recording of the L0 layer is returned to the innermost periphery of the disk before the recording of the L1 layer is started, Recording related to the L1 layer must be resumed. Further, when a series of content information such as a movie is recorded in this way, at the time of reproduction, an optical pickup that reaches the outermost circumference side of the disc after completion of reproduction of the L0 layer is connected to the disc before the reproduction of the L1 layer starts. Since the reproduction related to the L1 layer has to be resumed after returning to the innermost circumference, there is a technical problem that it is not easy to reproduce without interruption. For example, if the playback buffer is made large, it is possible to play without interruption when switching the recording layer to be played back, but for this reason, it is costly to incorporate a huge buffer. From the aspect, it is very disadvantageous in practice. In addition, even when recording information that is allowed to be interrupted is recorded or reproduced, there is a problem that it takes a very long time to actually switch the recording layer.

  On the other hand, among such two-layer information recording media, for example, an “opposite method” in which the direction of the track path is opposite between two recording layers, the OPC process is performed in the L0 layer. A dedicated area “PCA (Power Calibration Area)” is an area on the innermost circumference side of the disk that is near the start point of the track path in the L0 layer. Similarly, the PCA area in the L1 layer is an area on the outermost periphery side of the disk that is near the start point in the track path. However, in the case of such a configuration, if the OPC process is to be executed collectively for both the L0 layer and the L1 layer, the light in the vicinity of the innermost circumference of the disk after the OPC process of the L0 layer is completed. The pickup must be moved to the vicinity of the outermost periphery of the disk before the OPC process of the L1 layer is started, and then the OPC process related to the L1 layer must be restarted. Therefore, the OPC process has a technical problem that it takes a very long time. Conversely, if the OPC process is to be executed separately for the L0 layer and the L1 layer, the L0 layer is recorded after the OPC process related to the L0 layer, and the OPC related to the L1 layer is recorded at the end of the recording related to the L0 layer. After processing, the L1 layer will be recorded, but this causes a technical problem that it takes a very long time to switch the recording layer during the recording operation.

  The present invention has been made in view of, for example, the conventional problems described above. For example, it is possible to efficiently perform test writing on each recording layer and to record recording information efficiently. It is an object of the present invention to provide a multilayer information recording medium and an information recording apparatus and method capable of efficiently recording information on such an information recording medium.

  In order to solve the above problems, an information recording medium according to claim 1 of the present invention is a disc-shaped information recording medium, and (I) for calibrating the laser light by irradiating the recording laser light. Irradiating the laser beam with a first trial write area for trial writing the first trial write information along a first track path from the inner circumference side to the outer circumference side of the information recording medium. The first recording area for recording one recording information along the first track path in this order from the inner peripheral side and the first recording layer as viewed from the laser light irradiation side. (I) a second track path from the outer peripheral side toward the inner peripheral side by irradiating the laser light to calibrate the second test writing information for calibrating the laser light. To write along A second test writing area and (II) a second recording area for recording second recording information along the second track path by irradiating the laser beam in this order from the inner circumference side. 2 recording layers.

  In order to solve the above-mentioned problem, an information recording apparatus according to claim 7 of the present invention is a disk-shaped information recording medium, which is irradiated with a recording laser beam from the inner peripheral side of the information recording medium. A first recording layer for recording first information along a first track path toward the outer peripheral side, and located on the back side of the first recording layer as viewed from the laser light irradiation side; An information recording medium comprising: a second recording layer for recording second information along a second track path from the outer periphery side toward the inner periphery side by irradiating the laser beam; An information recording apparatus for recording second information, wherein the first information is written to the first recording layer by irradiating the laser light so as to be focused on the first recording layer, Focus laser light on the second recording layer A writing means for writing the second information to the second recording layer by irradiating; and a second for calibration of the laser beam as a part of the first information for the first recording layer. The trial writing of one trial writing information is performed, and the writing means is controlled so as to trial write the second trial writing information for calibration of the laser beam as a part of the second information to the second recording layer. After the trial writing of the first and second trial writing information by the trial writing control means and the trial writing control means, (I) the first recording layer was calibrated based on the first trial writing information The first recording information is recorded along the first track path as another part of the first information on the outer peripheral side of the area where the first trial writing information is trial-written by the laser beam. II) The second trial with respect to the second recording layer The second track information as the other part of the second information is moved to the outer circumference side of the area where the second test writing information is trial-written by the laser light calibrated based on the second track path. And a recording control means for controlling the writing means so as to record along the line.

  In order to solve the above-mentioned problem, the information recording method according to claim 14 of the present invention is a disc-shaped information recording medium, which is irradiated with a laser beam for recording from the inner peripheral side of the information recording medium. A first recording layer for recording first information along a first track path toward the outer peripheral side, and located on the back side of the first recording layer as viewed from the laser light irradiation side; An information recording medium comprising: a second recording layer for recording second information along a second track path from the outer periphery side toward the inner periphery side by irradiating the laser beam; The second information is recorded, and the first information is written to the first recording layer by irradiating the laser light on the first recording layer so that the laser light is focused on the first recording layer. Previously by irradiating the layers so as to concentrate An information recording method in an information recording apparatus comprising a writing means for writing the second information to a second recording layer, wherein the information is recorded as a part of the first information with respect to the first recording layer. First test writing information for laser beam calibration is written on a trial basis, and second test writing information for laser light calibration is written on the second recording layer as a part of the second information. (I) after the trial writing of the first and second trial writing information by the trial writing control step, and (I) the first trial with respect to the first recording layer. The first track information as the other part of the first information is transferred to the outer circumference side of the area where the first test write information is test-written by the laser light calibrated based on the write information. (II) said second As another part of the second information, the laser beam calibrated based on the second trial writing information with respect to the recording layer is positioned closer to the outer periphery than the region where the second trial writing information is trial-written. A recording control step of controlling the writing means so as to record second recording information along the second track path.

  The effect | action and gain of this invention are clarified from embodiment described below.

(Embodiment related to information recording medium)
An embodiment of the information recording medium of the present invention is a disk-shaped information recording medium, and (I) the first test writing information for calibration of the laser beam is irradiated with the recording laser beam, A first trial writing area for trial writing along a first track path from the inner circumference side to the outer circumference side of the recording medium; and (II) irradiating the laser beam with the first recording information in the first track path. The first recording area for recording along the first recording layer in this order from the inner peripheral side and the back side of the first recording layer as viewed from the laser light irradiation side (I) a second test writing for calibrating the second test writing information for calibrating the laser beam along the second track path from the outer peripheral side toward the inner peripheral side by irradiating the laser beam; 2 trial writing area and (I ) A second recording area for recording along the second record information into the second track path by irradiating the laser beam, and a second recording layer having from the inner circumferential side in this order.

  According to the embodiment of the information recording medium of the present invention, for example, the first and second recording layers are laminated on one surface of a disk-shaped substrate, and a two-layer type or a multi-layer type, for example, a DVD or An information recording medium such as an optical disk is constructed. In the first recording layer, for example, first recording information such as audio, video information or content information can be recorded along a first track path in a first recording area which is a user data area. In the second recording layer, for example, second recording information such as audio, video information or content information can be recorded along a second track path in a second recording area which is a user data area.

  Here, in particular, the first track path goes from the inner circumference side to the outer circumference side of the disk-shaped substrate, and conversely, the second track path goes from the outer circumference side to the inner circumference side. That is, in the two-layer or multilayer information recording medium, continuous recording by the “opposite method” in which the track path is directed in the opposite direction between the two recording layers is possible. Therefore, if recording is continuously performed from the end of the first recording layer (that is, the end on the outer peripheral side) to the start end of the second recording layer (that is, the end on the outer peripheral side), recording is performed. When switching the recording layer as the target of the recording process or the reproducing process related to information, the irradiation position of the laser beam in the substrate surface needs little or no change in the radial direction, so that rapid interlayer jump (ie, interlayer switching) Operation). For example, when recording information such as a movie is recorded as continuous first and second recording information, reproduction is performed without interruption without requiring a special buffer function for switching the recording layer. It is very convenient in practice in the sense that it becomes easy.

  Incidentally, in the case of the “parallel method” in which the track path is oriented in the same direction between the two recording layers, the end of the first recording layer and the start of the second recording layer are located on different sides. Therefore, when switching the recording layer as the target of the recording process or the reproducing process related to the recording information, the irradiation position of the laser beam in the substrate surface has to be changed from the outer peripheral end to the inner peripheral end. Jumping is difficult or impossible. Therefore, in the case of the parallel system, for example, when recording information such as a movie is recorded as continuous first and second recording information, it is difficult or impossible to perform continuous reproduction. As described above, according to the present embodiment, when continuous recording information is recorded on the two recording layers, a quick interlayer jump is possible, and it is possible to reproduce without interruption relatively easily.

  Furthermore, in the present embodiment, in the first recording layer, a first trial writing area such as a predetermined OPC pattern is placed in a first trial writing area, which is a power calibration area (PCA), for example, located on the inner circumference side of the first recording area. Writing information is recorded. On the other hand, in the second recording layer, second test writing information such as a predetermined OPC pattern is recorded in a second test writing area, which is PCA, for example, located on the inner periphery side of the second recording area. Thus, since both the first and second test writing areas are located on the inner peripheral side of the disk-shaped substrate, these two test writing areas are recorded before or just before recording the first and second recording information. If trial writing is performed collectively in the writing area, when the recording layer as the target of the recording processing or reproducing processing related to the trial writing information is switched, the irradiation position of the laser beam in the substrate surface is almost or in the radial direction. You do n’t have to change anything. For this reason, a quick interlayer jump at the time of trial writing becomes possible, and the total time required for trial writing of these two pieces of trial writing information can be greatly shortened.

  Incidentally, even in the case of the opposite method, the trial writing area in the first recording layer is arranged on the inner peripheral side which is the starting point side of the track path according to the general arrangement, and the trial writing in the second recording layer. If the area is arranged on the outer peripheral side, which is the starting point side of the track path, following the general arrangement, if trial writing information is collectively written on the two recording layers, the laser beam in the substrate plane Since the irradiation position must be changed from the inner circumference side to the outer circumference side, it takes time for the interlayer jump, and the total time for trial writing becomes very long. As described above, according to the present embodiment, when trial writing is performed on two recording layers, trial writing can be appropriately performed and the trial writing can be performed in a short time as a whole.

  As described above, according to the information recording medium of the present embodiment, the track paths are opposite in the first recording layer and the second recording layer, and the test writing area is on the same side (that is, the inside of the disc). Therefore, the recorded information can be reproduced without interruption during continuous reproduction, and the trial writing can be carried out quickly.

  In one aspect of the embodiment of the information recording medium of the present invention, the first recording area indicates addresses sequentially given from the inner circumference side to the outer circumference side along the first track path. First address information is recorded in advance, and second address information indicating addresses sequentially given from the outer peripheral side to the inner peripheral side along the second track path in the second recording area. Is recorded in advance.

  According to this aspect, for the first recording area, for example, absolute address information given throughout the information recording medium or the entire first recording layer, or relative address information given on the basis of several reference positions. The first address information is recorded along the first track path. Specifically, for example, pre-pit address information is recorded by land pre-pits embossed on a land track, and the address value in the first recording area increases from the inner circumference side to the outer circumference side. Increase. On the other hand, for the second recording area, for example, absolute address information given throughout the information recording medium and the whole second recording layer, and relative address information given with reference to several reference positions, etc. Two-address information is recorded along the second track path. Specifically, for example, prepit address information is recorded by land prepits embossed on a land track, and the address value in the second recording area increases from the outer peripheral side to the inner peripheral side. Increase. Therefore, according to the address information, recording or reproduction along the track path and test writing can be reliably performed in each of the first and second recording layers as described above.

  In another aspect of the embodiment of the information recording medium of the present invention, the first test writing area has an area portion of a predetermined size in the operation of writing the first test writing information each time from the outer periphery side to the inner periphery. In the second trial writing area, areas of a predetermined size are used in order from the inner circumference side to the outer circumference side in the operation of writing the second trial writing information each time.

  According to this aspect, the first test writing area is a region of a predetermined size from the outer peripheral side to the inner peripheral side in the operation of writing the first test writing information each time, for example, a series of OPC operations performed before the start of each recording. Used in the order of the side. For this reason, in the n-th (where n is a natural number equal to or greater than 2) trial write information write operation, the start end of the area portion written n-1 times is searched for along the first track path. As a result, the region where the n-th writing operation is performed can be easily specified in such a manner that it is retracted by a predetermined size. In particular, if address information is recorded along the first track path, the start end of the area portion written in the (n-1) th time can be easily specified by the address, and the area in which the nth write operation is performed is addressed. Can be easily identified. On the other hand, similarly for the second trial writing area, in the n-th trial writing information writing operation, the start end of the area portion written n-1 times is searched for along the second track path. As a result, the region where the n-th write operation is performed can be easily specified.

  In another aspect of the embodiment of the information recording medium of the present invention, the first recording layer is on the outer peripheral side of the first test writing area and on the inner peripheral side of the first recording area. The recording medium further includes a first control information area in which first control information for controlling at least a part of the recording operation and the reproducing operation of the first and second recording information is recorded. A second for controlling at least a part of the recording operation and the reproducing operation of the first and second recording information on the outer peripheral side of the second trial writing area and on the inner peripheral side of the second recording area. It further has a second control information area in which control information is recorded.

  According to this aspect, the first recording layer has various first control information areas, for example, RMA (Recording Management Area), located between the first test writing area and the first recording area. One control information is recorded along the first track path. The second recording layer records various second control information along the first track path in a second control information area, for example, RMA, located between the second test writing area and the second recording area. Is done. Accordingly, at the time of recording or reproduction of the information recording medium, the first or second control information is recorded or reproduced immediately before the recording or reproduction of the first or second recording information. In addition, based on the second control information, it is possible to perform complex and advanced reproduction and recording operations. At this time, the first control information area is located between the first trial writing area and the first recording area, and the second control information area is located between the second trial writing area and the second recording area. Therefore, according to the above-described embodiment, it is possible to easily reproduce the recorded information without interruption at the time of continuous reproduction, and the effect that the test writing can be quickly performed collectively is hardly hindered.

  In another aspect of the embodiment of the information recording medium of the present invention, the first recording layer includes first address information indicating an address in the first track path adjacent to the outer peripheral side of the first test writing area. Is recorded, and it further has a free area in which other information is not recorded.

  According to this aspect, with respect to the first recording layer, the first address information is recorded along the first track path in the empty area. Specifically, for example, prepit address information is recorded by land prepits embossed on land tracks. Therefore, when accessing the first recording area via the first test writing area along the first track path, even if the address information in the first test writing area is destroyed by the test writing, the first recording The address information can be confirmed in the empty area before reaching the area, that is, the current reading position in the optical pickup or the like can be specified. Accordingly, the access operation along the first track path can access the start portion of the first recording area without any problem. Similarly, when the first control information area exists, when the first control information area is accessed via the first test writing area along the first track path, the start portion of the first control information area Can be accessed without problems.

  In another aspect of the embodiment of the information recording medium of the present invention, the first test writing area and the second test writing area are in the radial direction of the information recording medium as viewed from the normal direction of the information recording medium. Or at least a portion of the first trial writing area where the first trial writing information is written and a portion of the second trial writing area where the second trial writing information is written. Are mutually offset in the radial direction.

  According to this aspect, since the first trial writing area and the second trial writing area are shifted from each other in the radial direction, the laser beam used for the trial writing in the second trial writing area is, for example, the first recording area. It does not pass through the first trial writing area, for example, through an empty area in the layer. For this reason, it is possible to prevent a situation in which the trial writing in the second trial writing area becomes inaccurate due to the influence of the recording state in the first trial writing area, that is, whether the recording is performed or not recorded by the trial writing information. If it is not shifted in the radial direction in this way, the optical characteristics such as transmittance change in the first test writing area depending on the difference between recording and non-recording. Trial writing in the area is more or less inaccurate.

  Alternatively, at least the area portion where the first trial writing information is written in the first trial writing area and the area portion where at least the second trial writing information is written in the second trial writing area are shifted from each other in the radial direction. The laser beam used for trial writing in the second trial writing area does not pass through the area portion where the first trial writing information is recorded, for example, by passing through an empty area in the first recording layer. Therefore, even if the first test writing area and the second test writing area overlap, there is a situation in which the test writing in the second test writing area becomes inaccurate due to the influence of the recording state in the first test writing area. Can be prevented. In this case, in the first trial writing area, trial writing is performed so that an empty area exists between areas where the trial writing information is actually written. Similarly, in the second trial writing area, Trial writing is performed so that an empty area exists between the areas where the trial writing information is actually written, and further, such an empty area is complementary between the first and second test writing areas in the substrate surface. Trial writing may be performed so that the positional relationship is established.

(Embodiment related to information recording apparatus)
An embodiment according to the information recording apparatus of the present invention is a disc-shaped information recording medium, and the first track path from the inner circumference side to the outer circumference side of the information recording medium is irradiated by irradiating a recording laser beam. A first recording layer for recording first information along the laser beam, and a position behind the first recording layer as viewed from the side irradiated with the laser beam. Information for recording the first and second information on an information recording medium comprising a second recording layer for recording second information along a second track path from the outer peripheral side toward the inner peripheral side In the recording apparatus, the first information is written to the first recording layer by irradiating the laser light so as to be condensed on the first recording layer, and the laser light is applied to the second recording layer. By irradiating so as to collect light, Writing means for writing the second information to the layer; and trial writing of the first test writing information for calibration of the laser beam as a part of the first information to the first recording layer. Test writing control means for controlling the writing means so as to test-write second test writing information for calibration of the laser beam as a part of the second information with respect to the second recording layer; After the trial writing of the first and second trial writing information by the trial writing control means, (I) the first recording layer is calibrated to the first recording layer by the laser light calibrated based on the first trial writing information. First recording information is recorded along the first track path as another part of the first information on the outer peripheral side from the area where the trial writing information is trial-written, and (II) on the second recording layer On the other hand, it was calibrated based on the second trial writing information. The second recording information is recorded along the second track path as another part of the second information on the outer peripheral side of the area where the second trial writing information is trial-written by the laser beam. Recording control means for controlling the writing means.

  According to the embodiment of the information recording apparatus of the present invention, for example, with respect to the above-described embodiment of the information recording medium of the present invention under the control of the test writing control means including a CPU (Central Processing Unit) and the like. Thus, the trial writing process for the two recording layers can be efficiently performed by writing means including, for example, an optical pickup. That is, since both the first and second test writing areas are located on the inner peripheral side of the disk-shaped substrate, these two recording layers are recorded before or just before recording the first and second recording information. It is possible to write a trial write collectively. As a result, when switching the recording layer as the target of the recording process related to the trial writing information, the irradiation position of the laser beam in the substrate surface can be changed almost or not in the radial direction, so that a quick interlayer in the trial writing can be performed. Jumping is possible. As a result, the total time required for trial writing with respect to these two recording layers can be greatly reduced.

  Further, for example, an opposite type recording process can be efficiently performed by a writing unit including an optical pickup or the like under the control of a recording control unit including a CPU or the like. That is, recording can be continuously performed from the end of the first recording layer (that is, the end on the outer peripheral side) to the start end of the second recording layer (that is, the end on the outer peripheral side). In particular, when switching the recording layer as the target of the recording processing related to the recording information, the irradiation position of the laser beam within the substrate surface can be changed little or not in the radial direction, so that rapid interlayer jump (that is, interlayer switching) Operation). Therefore, when recording information such as a movie is recorded as continuous first and second recording information, it is possible to perform continuous reproduction without requiring a special buffer function for switching the recording layer. Becomes easy.

  As described above, according to the information recording apparatus of the present embodiment, it is possible to reproduce the recorded information without interruption during continuous reproduction, and it is possible to perform trial writing in a rapid manner.

  In one aspect of the embodiment of the information recording apparatus of the present invention, the first recording area indicates addresses sequentially given from the inner circumference side to the outer circumference side along the first track path. First address information is recorded in advance, and second address information indicating addresses sequentially given from the outer peripheral side to the inner peripheral side along the second track path in the second recording area. Is recorded in advance, and further includes address reading means for reading the first and second address information, and the recording control means stores the first recording information in accordance with the read first address information. The writing means is controlled to record along the track path and to record the second recording information along the second track path in accordance with the read second address information.

  According to this aspect, the first address information is read by an address reading unit including an optical pickup, for example, so that recording or trial writing in the first recording layer is performed under the control of the recording control unit. Can be done reliably. Further, by reading the second address information by the address reading means, recording and trial writing on the second recording layer can be reliably performed along the second track path under the control of the recording control means.

  In this aspect, the first recording layer has a free area in which the first address information is recorded and no other information is recorded adjacent to the outer peripheral side of the first test writing area, and the address The reading unit may be configured to read the first address information by accessing the empty area.

  With this configuration, when accessing the first recording area via the first trial writing area along the first track path, the address information in the first trial writing area is temporarily destroyed by the trial writing. In addition, the first address information can be read by the address reading means in the empty area before reaching the first recording area. That is, the current reading position in the optical pickup or the like can be specified. Accordingly, the access operation along the first track path can access the start portion of the first recording area without any problem.

  In the second recording layer, since the second test writing area is located downstream of the second track path from the second recording area, the address information in the second track path, etc., is assumed by trial writing of the test writing information. Even if the data becomes unreadable, if each address position in the second recording area is accessed along the second track path from the outer peripheral side of the second recording layer, there will be no inconvenience in accessing the second recording area. . That is, no empty area is required for the second recording layer. In addition, for the second recording layer, even when the second control information area exists, the empty area is not necessary similarly.

  In another aspect of the embodiment of the information recording apparatus of the present invention, the information recording apparatus further comprises area detecting means for detecting an area where the first and second test writing information has already been test-written, and the test writing control means comprises: The writing unit is controlled so as to set a start position for writing the first and second trial writing information each time in accordance with the region detected by the region detecting unit.

  According to this aspect, the area where the first and second test writing information has already been test-written is detected by the area detecting means including an optical pickup, for example. After that, under the control of the trial writing control means, the start position for writing the first and second trial writing information for each time is set according to the area thus detected. Therefore, by performing trial writing, even if the address information in the first or second trial writing area is destroyed, each trial writing can be performed from an appropriate start position.

  In another aspect of the embodiment of the information recording apparatus of the present invention, the trial writing control means moves the region portion of a predetermined size from the outer peripheral side to the inner peripheral side in the operation of writing the first trial writing information each time. The writing means is controlled so that the second trial writing information is written each time, and the area portion having a predetermined size is used in order from the inner circumference side to the outer circumference side in the operation of writing the second trial writing information. Control means.

  According to this aspect, at the time of the n-th (where n is a natural number equal to or greater than 2) trial write information write operation, the start end of the area portion written n-1 times along the first track path Thus, it is possible to easily specify the area in which the n-th writing operation is performed in such a manner as to recede by a predetermined size.

  In another aspect of the embodiment of the information recording apparatus of the present invention, the recording control means is (I) the outer peripheral side of the area where the first test writing information is trial-written in the first recording layer. The writing is performed so that the first control information for controlling at least one of the recording operation and the reproducing operation of the first recording information is recorded on the inner circumference side of the area where the first recording information is recorded. And (II) recording operation and reproduction of the second recording information on the outer peripheral side of the second test writing area and on the inner peripheral side of the second recording area in the second recording layer. The writing means is controlled to record second control information for controlling at least one of the operations.

  According to this aspect, recording and reproduction of the first and second control information are performed before and after the recording of the first or second recording information, and in particular, based on these first and second control information, It is possible to perform complex and advanced playback and recording operations.

  In another aspect of the embodiment of the information recording apparatus of the present invention, the test writing control means is configured such that the first test writing area and the second test writing area are viewed from a normal direction of the information recording medium. The writing means is controlled to use areas shifted in the radial direction of the information recording medium, or at least the first trial writing information in the first trial writing area is written; The writing unit is controlled so that at least the area portion in which the second trial writing information is written in the second trial writing area uses an area shifted from each other in the radial direction.

  According to this aspect, the laser light used for the trial writing in the second trial writing area has the first trial writing area or the first trial writing information recorded, for example, by passing through an empty area in the first recording layer. Do not pass through the area. For this reason, it is possible to prevent a situation in which the trial writing in the second trial writing area becomes inaccurate due to the influence of the recording state in the first trial writing area, that is, whether the recording is performed or not recorded by the trial writing information. As a result, the first recording information and the second recording information can be suitably recorded using the laser light calibrated according to the accurate test writing result.

(Embodiment related to information recording method)
An embodiment according to the information recording method of the present invention is a disc-shaped information recording medium, and the first track path from the inner circumference side to the outer circumference side of the information recording medium is irradiated by irradiating a recording laser beam. A first recording layer for recording first information along the laser beam, and a position behind the first recording layer as viewed from the side irradiated with the laser beam. Recording the first and second information on an information recording medium comprising a second recording layer for recording second information along a second track path from the outer peripheral side toward the inner peripheral side, and The first information is written to the first recording layer by irradiating the first recording layer with a laser beam, and the second recording layer is irradiated with the laser beam. The second recording layer with respect to the second recording layer. An information recording method in an information recording apparatus provided with a writing means for writing information, wherein the first test writing for calibrating the laser beam as part of the first information is performed on the first recording layer. Trial writing for controlling the writing means to test-write information and to write second trial-writing information for calibration of the laser beam as part of the second information to the second recording layer (I) the laser beam calibrated to the first recording layer based on the first test writing information after the test step and the trial writing of the first and second test writing information by the test writing control step The first recording information is recorded along the first track path as another part of the first information on the outer peripheral side of the area where the first trial writing information is trial-written, and (II) The second trial for the second recording layer The second track information as the other part of the second information is moved to the outer circumference side of the area where the second test writing information is trial-written by the laser light calibrated based on the second track path. And a recording control step for controlling the writing means so as to perform recording.

  According to the embodiment of the information recording method of the present invention, as in the case of the above-described embodiment of the information recording apparatus of the present invention, it is possible to reproduce the recorded information without interruption during continuous reproduction. Moreover, test writings can be performed quickly and collectively.

  In the embodiment relating to the information recording method of the present invention, it is possible to appropriately adopt the same aspects as the various aspects of the above-described embodiment relating to the information recording method of the present invention.

  Such an operation and other advantages of the present embodiment will be further clarified from examples described below.

  As described above, according to the embodiment of the information recording medium of the present invention, the track paths are opposite in the first recording layer and the second recording layer, and the test writing area is aligned on the same side. Therefore, it is possible to efficiently perform test writing for each recording layer and to record recording information efficiently. Further, according to the embodiment of the information recording apparatus of the present invention, it is provided with the trial writing control means and the recording control means, and according to the embodiment of the information recording method of the present invention, the trial writing control step and the recording control. Since the process is provided, the trial writing can be efficiently performed on the information recording medium on the multilayer side, and the recording information can be efficiently recorded.

(First embodiment of information recording medium)
Next, an optical disc according to the first embodiment of the information recording medium of the present invention will be described in detail with reference to FIGS.

  First, the basic structure of an optical disc according to the first embodiment will be described with reference to FIG. FIG. 1 shows the basic structure of an optical disc according to the first embodiment of the information recording medium of the present invention, and the upper part is a schematic plan view of an optical disc having a plurality of recording areas, and the lower side associated therewith. The portion is a schematic conceptual view of the recording area structure in the radial direction.

  As shown in FIG. 1, an optical disc 100 is a lead according to the present embodiment, for example, on a recording surface on a disc body having a diameter of about 12 cm as in a DVD, from the inner peripheral side to the outer peripheral side with the center hole 1 as the center. An in-area 101, a data zone 102, and a lead-out area 103 are provided. In each recording area, 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. On the track 10, data is divided and recorded in units of ECC blocks 11. The ECC block 11 is a data management unit based on a preformat address in which recorded information can be error-corrected.

  The present invention is not particularly limited to an optical disc having such three areas. For example, even if the lead-in area 101 and the lead-out area 103 do not exist, the data structure described below can be constructed. Further, as will be described later, the lead-in area 101 and the lead-out 103 may be further subdivided.

  Next, with reference to FIG. 2, the physical configuration of the optical disc according to the present embodiment will be described. More specifically, the optical disc 100 according to the present embodiment is configured as a two-layer type optical disc in which a plurality of data zones 102 and the like are formed in a laminated structure, for example. FIG. 2 is a partially enlarged perspective view of the recording surface of the optical disc of the first embodiment.

  In FIG. 2, in this embodiment, the optical disc 100 is formed on a disc-shaped transparent substrate 106 (on the lower side in FIG. 2), which is a phase change type constituting an information recording surface or a non-reversible change recording type by heating or the like. One recording layer 107 is laminated, and a transflective film 108 is further laminated thereon (on the lower side in FIG. 2). Groove tracks GT and land tracks LT are alternately formed on the information recording surface formed by the surface of the first recording layer 107. Incidentally, at the time of recording and reproduction of the optical disc 100, for example, as shown in FIG. 2, the laser beam LB is irradiated onto the groove track GT through the transparent substrate. For example, at the time of recording, the laser beam LB is irradiated with the recording laser power, so that irreversible change recording by writing or heating by phase change to the first recording layer 107 is performed according to the recording data. On the other hand, at the time of reproduction, the recording data written to the first recording layer 107 is read by irradiating the laser beam LB with a reproduction laser power weaker than the recording laser power.

  In this embodiment, the groove track GT is oscillated with a constant amplitude and spatial frequency. That is, the groove track GT is wobbled, and the period of the wobble 109 is set to a predetermined value. On the land track LT, address pits called land prepits LP indicating preformat address information are formed. Information necessary for data recording such as disk rotation control during recording, generation of a recording clock, and recording address can be obtained by these two addressing (ie, wobble 109 and land prepit LP). The preformat address information may be recorded in advance by modulating the wobble 109 of the groove track GT by a predetermined modulation method such as frequency modulation or phase modulation.

  Particularly in this embodiment, the second recording layer 207 is formed on the transflective film 108 (lower side in FIG. 2), and the reflective film 208 is further formed thereon (lower side in FIG. 2). . The second recording layer 207 is irradiated with the laser beam LB through the transparent substrate 106, the first recording layer 107, and the semi-transmissive reflective film 108. It is configured to be able to perform irreversible change recording type recording and reproduction. The second recording layer 207 and the reflective film 208 may be formed on the transparent substrate 106 on which the first recording layer 107 and the semi-transmissive reflective film 108 are formed, or may be formed on another substrate. After film formation, this may be bonded to the transparent substrate 106. A transparent intermediate layer 205 made of a transparent adhesive or the like is provided between the transflective film 108 and the second recording layer 207 as appropriate according to the manufacturing method.

  At the time of recording / reproduction of such a two-layer optical disc 100, recording / reproduction is performed on the first recording layer 107 or the second recording layer depending on which recording layer the focusing position of the laser beam LB is adjusted to. Recording / reproduction at 207 is performed.

  Note that the optical disc 100 according to the present embodiment is not limited to the two-layer single-sided, ie, dual layer, as shown in FIG. 2, and may be two-layer double-sided, ie, dual-layer double side. Furthermore, as described above, the optical disk is not limited to an optical disk having two recording layers, and may be a multilayer optical disk having three or more layers.

  Next, with reference to FIG. 3, the data structure and the area used in the OPC process for the optical disc according to the first embodiment of the information recording medium of the present invention will be described in more detail. FIG. 3 is a data structure diagram conceptually showing the data structure of the optical disc and the area used in the OPC process according to the first embodiment of the information recording medium of the present invention.

  As shown in FIG. 3, the optical disc 100 has two recording layers, that is, an L0 layer (that is, a recording layer corresponding to the first recording layer 107 in FIGS. 1 and 2) and an L1 layer (that is, FIGS. 1 and 2). Recording layer corresponding to the second recording layer 207 in FIG.

  In the L0 layer, a lead-in area 101-1, a data zone 102-1 and a middle area 104-1 are provided from the inner circumference side to the outer circumference side. The lead-in area 101-1 further includes an example of the power calibration area 101 P-1 constituting an example of the “first test writing area” according to the present invention and the “first control information area” according to the present invention. A recording management area 101M-1 is provided.

  On the other hand, the L1 layer is also provided with a middle area 104-2, a data zone 102-2, and a lead-out area 103-2 from the outer peripheral side to the inner peripheral side. The lead-out area 103-2 further includes an example of a power calibration area 101P-2 that constitutes an example of the “second test writing area” according to the present invention and an example of the “second control information area” according to the present invention. A recording management area 101M-2 is provided.

  Specifically, the power calibration area 101P-1 (101P-2) is an area used for the optimum recording laser power detection (ie, recording laser power calibration) process, so-called OPC process. In particular, the power calibration area 101P-1 is used for detecting the optimum recording laser power of the L0 layer, and the power calibration area 101P-2 is used for detecting the optimum recording laser power of the L1 layer. Used. More specifically, after completion of the trial writing of the OPC pattern, the trial-written OPC pattern is reproduced, and the reproduced OPC pattern is sequentially sampled to detect the optimum recording laser power. Further, the optimum recording laser power value obtained by OPC may be stored in a storage device such as a memory described later provided on the information recording device side, a management information recording area in the information recording medium, or the like. May be recorded.

  Then, with respect to the L0 layer and the L1 layer, a laser beam for OPC processing is emitted from the substrate side (not shown), that is, from the lower side to the upper side in FIG. The focal distance and the like are controlled, and the moving distance and direction of the optical disc 100 in the radial direction are controlled.

  In particular, the dual-layer optical disc 100 according to the first embodiment can perform continuous recording by the “opposite method” in which the track path is directed in the opposite direction between the two recording layers in the data recording or reproducing process. Is done. More specifically, under the opposite method, the optical pickup of the information recording / reproducing apparatus, which will be described later, in the L0 layer, the direction of the first track path TP1 indicated by the bold right arrow shown in FIG. That is, the disk-shaped substrate moves from the inner peripheral side toward the outer peripheral side. Next, interlayer jump, that is, focusing from the L0 layer to the L1 layer is performed. Next, in the L1 layer, the optical pickup moves in the second track path TP2 direction indicated by the thick left arrow shown in FIG. 3, that is, from the outer peripheral side to the inner peripheral side.

  In particular, in the first embodiment, the OPC process is performed collectively before and after the recording operation of the L0 layer and the L1 layer.

  Specifically, each OPC process in the power calibration area 101P-1 of the L0 layer is performed in the reverse order of the first track path TP1.

  More specifically, the first OPC process is performed using the area PC1-1 from the outermost peripheral side of the area of the power calibration area 101P-1, and the second OPC process is sequentially performed on the area PC1-2, A third OPC process is performed using the area PC1-3. As described above, in the L0 layer, the region of the power calibration area 101P-1 is consumed, that is, destroyed, toward the inner peripheral side by the OPC process. In each OPC process in the L0 layer, trial writing of the OPC pattern and reproduction of the trial-written OPC pattern are performed along the direction of the first track path TP1.

  On the other hand, each OPC process in the power calibration area 101P-2 of the L1 layer is also performed in the order opposite to the second track path TP2.

  More specifically, the first OPC process is performed using the area PC2-1 from the innermost circumference side of the area of the power calibration area 101P-2, and the second OPC process is sequentially performed in the area PC2-2. The third OPC process is performed using the area PC2-3. As described above, in the L1 layer, the region of the power calibration area 101P-2 is consumed, that is, destroyed, toward the outer peripheral side by the OPC process. In each OPC process in the L1 layer, trial writing of the OPC pattern and reproduction of the trial-written OPC pattern are performed along the direction of the second track path TP2.

  Note that the control information is recorded and reproduced in the recording management area 101M-1 in the L0 layer in the same direction as the first track path TP1 without the address information being destroyed unlike the OPC process.

  More specifically, the control information is recorded and reproduced for the first time from the inner periphery side of the recording management area 101M-1 by using the area MD1-1. Reproduction is performed in the area MD1-2, and control information is recorded and reproduced for the third time using the area MD1-3. Thus, in the L0 layer, the area of the recording management area 101M-1 is used toward the outer peripheral side.

  On the other hand, unlike the OPC process, the recording and reproduction of control information in the recording management area 101M-2 of the L1 layer is performed in the same direction as the second track path TP2, without destroying the address information.

  More specifically, the first control information recording and reproduction is performed using the area MD2-1 from the outer periphery side of the recording management area 101M-2, and the second control information recording and reproduction is sequentially performed. In the area MD2-2, the control information is recorded and reproduced for the third time using the area MD2-3. Thus, in the L1 layer, the area of the recording management area 101M-2 is used toward the inner peripheral side.

  As described above, according to the information recording medium of the first embodiment, the track paths are opposite in the L0 layer and the L1 layer, and the power calibration area 101P-1 (101P-2) is on the same side. (That is, on the inner circumference side of the disc), the recording information can be reproduced relatively easily without interruption during continuous reproduction, and the OPC processing can be performed quickly and collectively.

  Further, even if the power calibration area 101P-1 (101P-2) is aligned on the same side (that is, the inner circumference side of the disk), the L0 layer is subjected to the OPC process from the outer circumference side of the power calibration area 101P-1. And the L1 layer is subjected to the OPC process from the inner periphery side of the power calibration area 101P-2, so that the OPC process of the L0 layer and the L1 layer affect each other and the test writing becomes inaccurate. Can be suppressed.

(Second embodiment of information recording medium)
Next, with reference to FIG. 4, the data structure and the area used in the OPC process for the optical disc in the second embodiment of the information recording medium of the present invention will be described in more detail. FIG. 4 is a data structure diagram conceptually showing the data structure of the optical disc and the area used in the OPC process according to the second embodiment of the information recording medium of the present invention.

  The basic structure and the OPC process in the second embodiment of the information recording medium are substantially the same as those in the first embodiment described with reference to FIGS.

  In particular, in the second embodiment of the information recording medium, in addition to the area of the first embodiment, an unrecordable area 101U-1 in the L0 layer constituting an example of the “free area” according to the present invention is provided.

  Specifically, in this unrecordable area 101U-1, for example, prepit address information is recorded by land prepits embossed on a land track. Therefore, for example, when accessing the recording management area 101M-1 via the power calibration area 101P-1 along the first track path TP1, the address information in the power calibration area 101P-1 is temporarily recorded by trial writing. Even if it is destroyed, the address information can be confirmed in the unrecordable area 101U-1 before reaching the recording management area 101M-1, that is, the current reading position in the optical pickup or the like can be specified. Therefore, the access operation along the first track path TP1 makes it possible to access the start of the recording management area 101M-1 without any problem.

(Third embodiment of information recording medium)
Next, with reference to FIG. 5, the data structure and the area used in the OPC process for the optical disc according to the third embodiment of the information recording medium of the present invention will be described in more detail. FIG. 5 is a data structure diagram conceptually showing the data structure of the optical disc according to the third embodiment of the information recording medium of the present invention and the area used in the OPC process.

  The basic structure and the OPC process in the third embodiment of the information recording medium are substantially the same as those in the first embodiment described with reference to FIGS.

  Particularly in the third embodiment of the information recording medium, as shown in FIG. 5, the power calibration area 101P-1 and the power calibration area 101P-2 are shifted from each other in the radial direction. In the third embodiment, in addition to the recording area of the first embodiment, an unrecordable area 101U-1 is provided on the inner circumference side of the power calibration area 101P-1 in the L0 layer. In the L1 layer, an unrecordable area 101U-2 is provided on the outer peripheral side of the power calibration area 101P-2.

  Since the third embodiment is configured as described above, the laser light for trial writing in the power calibration area 101P-2 passes through the unrecordable area 101U-1 in the L0 layer, for example, so that the power calibration is performed. Does not pass through the area 101P-1. For this reason, there is a situation in which the test writing in the power calibration area 101P-2 becomes inaccurate due to the influence of the recording state in the power calibration area 101P-1, that is, whether it is recorded or not recorded by the test writing information. It can be prevented.

(Fourth embodiment of information recording medium)
Next, with reference to FIG. 6, the data structure and the area used in the OPC process for the optical disc in the fourth embodiment of the information recording medium of the present invention will be described in more detail. FIG. 6 is a data structure diagram conceptually showing the data structure of the optical disc and the area used in the OPC process according to the fourth embodiment of the information recording medium of the present invention.

  The basic structure and the OPC process in the fourth embodiment of the information recording medium are substantially the same as those in the first embodiment described with reference to FIGS.

  Particularly in the fourth embodiment of the information recording medium, as shown in FIG. 6, the power calibration area 101P-1 in the L0 layer and the power calibration area 101P-2 in the L1 layer are in a complementary positional relationship. Has been placed. That is, corresponding to the power calibration area 101P-1 in the L0 layer, the unrecordable area 101U-2 is provided at the same radial position in the L1 layer. Similarly, an unrecordable area 101U-1 is provided at the same radial position in the L0 layer corresponding to the power calibration area 101P-2 in the L1 layer.

  Since the fourth embodiment is configured as described above, the effects of the second embodiment and the third embodiment can be enjoyed simultaneously and reliably.

(Information recording / reproducing device)
Next, the configuration and operation of the information recording apparatus of the present invention will be described with reference to FIG. In particular, the present embodiment is an example in which the information recording apparatus according to the present invention is applied to the information recording / reproducing apparatus for an optical disc described above.

  First, the configuration of the information recording / reproducing apparatus 300 in the embodiment according to the information recording apparatus of the present invention will be described with reference to FIG. FIG. 7 is a block diagram of the information recording / reproducing apparatus 300 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 internal configuration of the information recording / reproducing apparatus 300 will be described with reference to FIG. The information recording / reproducing apparatus 300 is an apparatus that records information on the optical disc 100 and reads information recorded on the optical disc 100 under the control of the CPU 354.

  The information recording / reproducing apparatus 300 includes an optical disc 100, a spindle motor 351, an optical pickup 352, a signal recording / reproducing means 353, a CPU (drive control means) 354, a memory 355, a data input / output control means 306, an operation button 310, a display panel 311, And a bus 357.

  The spindle motor 351 rotates and stops the optical disc 100, and operates when accessing the optical disc. More specifically, the spindle motor 351 is configured to rotate and stop the optical disc 100 at a predetermined speed while receiving spindle servo from a not-shown servo unit or the like.

  The optical pickup 352 performs recording / reproduction with respect to the optical disc 100, and includes a semiconductor laser device and a lens. More specifically, the optical pickup 352 irradiates the optical disc 100 with a light beam such as a laser beam at a first power as reading light during reproduction, and modulates with a second power as writing light at the time of recording. Irradiate. In particular, the optical pickup 352 constitutes an example of “writing means”, “address reading means”, “area detection means” and the like of the present invention.

  The signal recording / reproducing means 353 performs recording / reproduction with respect to the optical disc 100 by controlling the spindle motor 351 and the optical pickup 352. More specifically, the signal recording / reproducing means 353 includes, for example, a laser diode (LD) driver and a head amplifier. The laser diode driver (LD driver) drives a semiconductor laser (not shown) provided in the optical pickup 352. The head amplifier amplifies the output signal of the optical pickup 352, that is, the reflected light of the light beam, and outputs the amplified signal.

  In particular, in the present embodiment, the signal recording / reproducing means 353 can determine the optimum laser power by the OPC pattern recording and reproduction processing together with a timing generator (not shown) under the control of the CPU 354 during the OPC processing. A semiconductor laser (not shown) provided in the optical pickup 352 is driven.

  The memory 355 is used in general data processing and OPC processing in the information recording / reproducing apparatus 300, such as a buffer area for recording / reproducing data and an area used as an intermediate buffer for conversion to data usable by the signal recording / reproducing means 353. . The memory 355 includes a ROM area in which a program for performing operations as these recorder devices is stored, a buffer used for compressing / decompressing video data, and a RAM area in which variables necessary for the program operation are stored. .

  A CPU (drive control means) 354 is connected to the signal recording / reproducing means 353 and the memory 355 via the bus 357, and controls the entire information recording / reproducing apparatus 300 by giving instructions to each control means. Normally, software for operating the CPU 354 is stored in the memory 355. In particular, the CPU 354 constitutes an example of “trial writing control means”, “recording control means”, and the like according to the present invention.

  The data input / output control unit 306 controls data input / output from the outside to the information recording / reproducing apparatus 300, and stores and retrieves data from / in the data buffer on the memory 355. When the data input / output is a video signal, the data received from the outside is compressed (encoded) into the MPEG format at the time of data input, and then output to the memory 355. At the time of data output, the MPEG format received from the memory 355 is output. Data is decompressed (decoded) and then output to the outside.

  The operation control means 307 receives and displays an operation instruction for the information recording / reproducing apparatus 300. The operation control means 307 transmits an instruction by the operation button 310 such as recording or reproduction to the CPU 354, and indicates the operation state of the information recording / reproducing apparatus 300 such as recording or reproduction. Output to a display panel 311 such as a fluorescent tube.

  As described above, the household device, which is an example of the information recording / reproducing apparatus 300, is a recorder device that records and reproduces video. This recorder device is a device that records a video signal from a broadcast receiving tuner or an external connection terminal on a disc, and outputs the video signal reproduced from the disc to an external display device such as a television. The operation as a recorder device is performed by causing the CPU 354 to execute the program stored in the memory 355.

(Flow of recording operation by information recording device)
Next, with reference to FIG. 8, the recording operation of the optical disc and the flow of the OPC process in the embodiment of the information recording apparatus of the present invention will be described in detail. FIG. 8 is a flowchart showing the optical disk recording operation and the OPC process in the embodiment of the information recording apparatus of the present invention.

  In FIG. 8, when the optical disk 100 is loaded, a seek operation is performed by the optical pickup 352 under the control of the CPU 354, and various management information necessary for recording processing on the optical disk 100 is acquired. Based on this management information, under the control of the CPU 354, for example, in accordance with an instruction from an external input device or the like, it is determined whether or not to start the data recording operation of the optical disc 100 via the data input / output control means 306 ( Step S101). Here, when the data recording operation of the optical disc 100 is started (step S101: Yes), it is further determined whether or not the recording layers to be recorded are the L0 layer and the L1 layer (step S102). If the recording layers to be recorded are the L0 layer and the L1 layer (step S102: Yes), the OPC process is performed on the L0 layer and the L1 layer (step S103). In particular, in the present embodiment, as described above, the track paths are opposite in the L0 layer and the L1 layer, and the power calibration area 101P-1 (101P-2) is on the same side (that is, the disk). The inner peripheral side), OPC processing can be carried out quickly and collectively. Moreover, after recording, it is possible to reproduce the recorded information without interruption during continuous reproduction.

  Subsequently, data is recorded on the L0 layer and the L1 layer with the optimum recording laser power calculated in step S103 (step S104).

  On the other hand, if the result of the determination in step S102 is that the recording layer to be recorded is not the L0 layer or the L1 layer (step S102: No), it is further determined whether or not the recording layer to be recorded is only the L0 layer. (Step S105). Here, when the recording layer to be recorded is only the L0 layer (step S105: Yes), the OPC process is performed on the L0 layer (step S106).

  Subsequently, data is recorded on the L0 layer with the optimum recording laser power calculated in step S106 (step S107).

  On the other hand, if the result of determination in step S105 is that the recording layer to be recorded is not only the L0 layer (step S105: No), the OPC process is performed on the L1 layer (step S108).

  Subsequently, data is recorded on the L1 layer with the optimum recording laser power calculated in step S108 (step S109).

  Subsequently, it is determined whether or not to end the data recording operation (step S110). Here, when the data recording operation is terminated (step S110: Yes), a series of recording operations by the information recording apparatus is completed.

  On the other hand, when the data recording operation is not terminated (step S110: No), it is determined whether or not the above-described recording layers to be recorded are the L0 layer and the L1 layer (step S102).

  On the other hand, if the result of the determination in step S101 is that the data recording operation on the optical disc 100 is not started (step S101: No), for example, an instruction such as a recording operation start command is awaited.

  The present invention is not limited to the above-described embodiments, and can be changed as appropriate without departing from the spirit or concept of the invention that can be read from the claims and the entire specification, and information recording accompanying such changes is possible. A medium, an information recording apparatus, and a method are also included in the technical scope of the present invention.

  INDUSTRIAL APPLICABILITY The information recording medium, information recording apparatus and method according to the present invention can be used for, for example, a multi-layer optical disc capable of recording various information with high density for consumer use or business use. Etc. are available. Further, the present invention can also be used for an information recording medium, an information recording apparatus, and the like that are mounted on or connectable to various computer equipment for consumer use or business use.

1 shows the basic structure of an optical disc according to a first embodiment of the information recording medium of the present invention, wherein the upper portion is a schematic plan view of an optical disc having a plurality of recording areas, and the lower portion associated therewith is the radial direction thereof. 2 is a schematic conceptual diagram of a recording area structure in FIG. 1 is a partially enlarged perspective view of a recording surface of an optical disc according to a first embodiment of an information recording medium of the present invention. FIG. 2 is a data structure diagram conceptually showing a data structure of an optical disc according to the first embodiment of the information recording medium of the present invention and an area used in OPC processing. It is a data structure figure which shows notionally the data structure of the optical disk based on 2nd Example of the information recording medium of this invention, and the area | region used in OPC processing. It is a data structure figure which shows notionally the data structure of the optical disk based on 3rd Example of the information recording medium of this invention, and the area | region used in OPC processing. It is a data structure figure which shows notionally the data structure of the optical disk based on 4th Example of the information recording medium of this invention, and the area | region used in an OPC process. It is a block diagram of the information recording / reproducing apparatus in the Example which concerns on the information recording apparatus of this invention. It is the flowchart figure which showed the recording operation and OPC processing of the optical disk in the execution example which relates to the information recording device of this invention.

Explanation of symbols

1 Center hole 10 Track 11 ECC block 100 Optical disk 101 (101-1) Lead-in area 102-1 (102-2) Data zone 103 (103-2) Lead-out area 101P-1 (101P-2) Power calibration area 101M-1 (101M-2) Recording management area 101U-1 Unrecordable area in the L0 layer 101U-2 Unrecordable area in the L1 layer 104-1 (104-2) Middle area 106 Transparent substrate 107 First recording layer 109 Wobble 108 Transflective film 205 Intermediate layer 207 Second recording layer 208 Reflective film 300 Information recording / reproducing device 306 Data input / output control means 307 Operation control means 310 Operation button 311 Display panel 351 Spindle motor 35 2 Optical pickup 353 Signal recording / reproducing means 354 CPU (drive control means)
355 Memory GT Groove track LT Land track LB Laser light LP Land pre-pits PC1-1 to PC1-n Regions PC2-1 to PC2-n L1 that have been trial-written in the first OPC process to the first OPC process in the L0 layer The area MD1-1 to the MD1-n L0 layer, which were trial-written in the first OPC process from the first OPC process in the layer, were used for the recording and reproduction of the nth control information from the first control information recording in the L0 layer. Area MD2-1 to MD2-n Area used for recording and reproduction of control information from the first recording of control information in the L1 layer

Claims (14)

A disc-shaped information recording medium,
(I) By irradiating the recording laser beam, the first test writing information for calibrating the laser beam is trial-written along the first track path from the inner circumference side to the outer circumference side of the information recording medium. And (II) a first recording area for recording the first recording information along the first track path by irradiating the laser beam in this order from the inner circumference side. A first recording layer;
It is located behind the first recording layer as viewed from the laser light irradiation side, and (I) the second test writing information for calibration of the laser light by irradiating the laser light. A second trial writing area for trial writing along a second track path from the outer peripheral side toward the inner peripheral side, and (II) irradiating the laser beam with second recording information along the second track path. And a second recording layer having a second recording area for recording in this order from the inner circumference side. In the first recording area, first address information indicating addresses sequentially given from the inner circumference side toward the outer circumference side along the first track path is recorded in advance.
In the second recording area, second address information indicating addresses sequentially given from the outer peripheral side toward the inner peripheral side along the second track path is recorded in advance. The information recording medium according to claim 1. In the first test writing area, in each operation of writing the first test writing information, an area portion of a predetermined size is used in order from the outer peripheral side to the inner peripheral side,
The first test writing area is characterized in that an area portion of a predetermined size is used in order from the inner circumference side to the outer circumference side in the operation of writing the second trial write information each time. The information recording medium according to item. The first recording layer controls at least one of a recording operation and a reproducing operation of the first recording information on the outer peripheral side of the first test writing area and on the inner peripheral side of the first recording area. A first control information area in which first control information for recording is further recorded,
The second recording layer controls at least one of a recording operation and a reproducing operation of the second recording information on the outer peripheral side of the second test writing area and on the inner peripheral side of the second recording area. The information recording medium according to claim 1, further comprising a second control information area in which second control information for recording is recorded.   In the first recording layer, first address information indicating an address in the first track path is recorded adjacent to the outer peripheral side of the first test writing area, and a free area in which no other information is recorded is further recorded. The information recording medium according to claim 1, wherein the information recording medium is provided.   The first test writing area and the second test writing area are shifted from each other in the radial direction of the information recording medium as viewed from the normal direction of the information recording medium, or the first test writing area At least the area portion in which the first trial writing information is written and the area portion in which at least the second trial writing information is written in the second trial writing area are shifted from each other in the radial direction. The information recording medium according to claim 1. A disk-shaped information recording medium, which is a first information for recording first information along a first track path from the inner circumference side to the outer circumference side of the information recording medium by irradiating a recording laser beam. A recording layer and a second track that is located on the back side of the first recording layer as viewed from the laser light irradiation side and that travels from the outer peripheral side to the inner peripheral side by irradiating the laser light. An information recording apparatus for recording the first and second information on an information recording medium comprising a second recording layer for recording second information along a path,
Irradiating the laser beam to the first recording layer by irradiating the laser beam to the first recording layer, and writing the first information to the first recording layer and irradiating the laser beam to the second recording layer. A writing means for writing the second information to the second recording layer,
First test writing information for calibration of the laser beam is written on the first recording layer as a part of the first information, and a part of the second information is written on the second recording layer. Test writing control means for controlling the writing means to test write the second test writing information for calibration of the laser beam,
After the trial writing of the first and second trial writing information by the trial writing control means, (I) the first recording layer by the laser light calibrated based on the first trial writing information. Recording the first recording information along the first track path as the other part of the first information on the outer peripheral side of the area where one trial writing information is trial-written, and (II) the second recording layer On the other hand, the laser light calibrated based on the second test writing information has a second part of the second information as a second part of the second information on the outer peripheral side from the region where the second test writing information is test-written. An information recording apparatus comprising: a recording control unit that controls the writing unit so as to record recording information along the second track path. In the first recording area, first address information indicating addresses sequentially given from the inner circumference side toward the outer circumference side along the first track path is recorded in advance.
Second address information indicating addresses sequentially given from the outer peripheral side toward the inner peripheral side along the second track path is recorded in the second recording area in advance.
An address reading means for reading the first and second address information;
The recording control means records the first recording information along the first track path according to the read first address information, and the second recording information according to the read second address information. 8. The information recording medium device according to claim 7, wherein the writing unit is controlled to perform recording along a track path. The first recording layer has a free area in which the first address information is recorded and no other information is recorded adjacent to the outer peripheral side of the first test writing area,
9. The information recording apparatus according to claim 8, wherein the address reading unit reads the first address information by accessing the empty area. An area detecting means for detecting an area in which the first and second test writing information has already been test-written;
The trial writing control means controls the writing means to set a start position when writing the first and second trial writing information for each time according to the area detected by the area detecting means. 8. The information recording apparatus according to claim 7, wherein   The trial writing control means controls the writing means to use a region portion of a predetermined size in order from the outer circumference side to the inner circumference side in the operation of writing the first trial writing information each time. 8. The writing means according to claim 7, wherein the writing means is controlled to use an area portion of a predetermined size in order from the inner circumference side to the outer circumference side in the operation of writing the second trial writing information. The information recording device described.   The recording control means is (I) the outer peripheral side of the area where the first test writing information is trial-written in the first recording layer and the inner peripheral side of the area where the first recording information is recorded. And (II) controlling the writing means so as to record first control information for controlling at least one of the recording operation and the reproducing operation of the first recording information, and (II) in the second recording layer, Second control information for controlling at least one of the recording operation and the reproducing operation of the second recording information is recorded on the outer peripheral side of the second trial writing area and on the inner peripheral side of the second recording area. The information recording apparatus according to claim 7, wherein the writing unit is controlled to do so.   The test writing control unit uses an area in which the first test writing area and the second test writing area are shifted from each other in the radial direction of the information recording medium when viewed from the normal direction of the information recording medium. The writing means is controlled so that at least the first trial writing information is written in the first trial writing area and at least the second trial writing information is written in the second trial writing area. 8. The information recording apparatus according to claim 7, wherein the writing unit is controlled so that a region portion that is shifted from each other in the radial direction is used. A disk-shaped information recording medium, which is a first information for recording first information along a first track path from the inner circumference side to the outer circumference side of the information recording medium by irradiating a recording laser beam. A recording layer and a second track that is located on the back side of the first recording layer as viewed from the laser light irradiation side and that travels from the outer peripheral side to the inner peripheral side by irradiating the laser light. The first and second information are recorded on an information recording medium including a second recording layer for recording second information along a path, and the laser light is condensed on the first recording layer. By irradiating the first recording layer, the first information is written to the first recording layer, and the second recording layer is irradiated with the laser beam so as to be focused on the second recording layer. 2 Information provided with writing means for writing information An information recording method in the recording apparatus,
First test writing information for calibration of the laser beam is written on the first recording layer as a part of the first information, and a part of the second information is written on the second recording layer. A test writing control step of controlling the writing means so as to test write the second test writing information for calibration of the laser beam,
After the trial writing of the first and second trial writing information in the trial writing control step, (I) the first recording layer is calibrated by the laser light calibrated based on the first trial writing information. Recording the first recording information along the first track path as the other part of the first information on the outer peripheral side of the area where one trial writing information is trial-written, and (II) the second recording layer On the other hand, the laser light calibrated based on the second test writing information has a second part of the second information as a second part of the second information on the outer peripheral side from the region where the second test writing information is test-written. A recording control step of controlling the writing means so as to record the recording information along the second track path.

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