WO2007114044A1

WO2007114044A1 - Information recording medium

Info

Publication number: WO2007114044A1
Application number: PCT/JP2007/055641
Authority: WO
Inventors: Kazuo Kuroda
Original assignee: Pioneer Corporation
Priority date: 2006-03-31
Filing date: 2007-03-20
Publication date: 2007-10-11
Also published as: JPWO2007114044A1; JP4425322B2

Abstract

A first emboss pit region (21) is arranged in a lead in region (11). An emboss pit is formed in the first emboss pit region (21). A first wobble region (22), a second emboss pit region (23), and a second wobble region (24) are formed in a user data region (12). No emboss pit is formed and a wobble is formed in the first wobble region (22) and in the second wobble region (24). An emboss pit is formed in the second emboss pit region (23). No wobble is formed in the straight emboss pit region (23A) in the second emboss pit region (23). The emboss pit regions (21, 23) are reproduction-dedicated regions and the wobble regions (22, 24) are recording-enabled regions.

Description

Information recording medium

Technical field

The present invention relates to an information recording medium suitable for recording content data such as a movie, a television program, or music.

Background art

[0002] CSS (Content Scramble System) is an encryption method used when content data is encrypted and recorded on a DVD-ROM. CSS is used in DVD-ROM and other playback-only DVDs, but not in recordable DVDs such as DVD-R and DVD-RW. The recordable DVD uses an encryption method different from CSS, called CPRM (Content Protection for Prerecorded Media).

[0003] Now, two types of DVD players are in widespread use. One is a type of DVD player that can play content data that has been encrypted by CSS and recorded on a DVD, but cannot play content data that has been encrypted by CPRM and recorded on a DVD. . Hereinafter, this type of DVD player is referred to as a “first generation DVD player”. The other is a DVD player (with a playback function) that can play back both content data encrypted on CSS and recorded on a DVD as well as content data encrypted on CPRM and recorded on a DVD. Including DVD recorder). This type of DVD player is referred to as a “second generation DVD player”!

Disclosure of the invention

Problems to be solved by the invention

[0004] By the way, with the widespread use of recordable DVDs and DVD recorders, users can record content data such as movies (content data) using DVD recorders to the extent that they do not violate copyright protection rules. Possible to record on DVD

[0005] However, as described above, CPRM is employed for recordable DVDs. Therefore, if it is necessary to encrypt the content data and record it on a recordable DVD This content data is encrypted by CPRM and recorded on a recordable DVD. As a result, content data encrypted and recorded on recordable DVDs cannot be played back on first-generation DVD players! /.

[0006] In order to eliminate such inconvenience, it is conceivable to encrypt the content data with CSS and record it on a recordable DVD. This makes it possible to play back content data encrypted and recorded on a recordable DVD on a first-generation DVD player.

[0007] However, if content data is encrypted with CSS and recorded on a recordable DVD, the content data cannot be played back on a second-generation DVD player. In other words, the 2nd generation DVD player guesses a recordable DVD whose content data is encrypted and recorded with an encryption method other than CPRM as a DVD that may have been illegally copied, Designed to refuse playback (eg eject)!

[0008] In this way, information such as content data encrypted and recorded on a DVD using an information recording device such as a DVD recorder is reproduced on both the first generation DVD player and the second generation DVD player. I can't. In other words, the light beam emitted from the optical pickup is different from that of DVD-R and DVD-RW, which is different from the recording method in which information is recorded by forming embossed pits on the substrate using a stamper like DVD-ROM. The information recorded on the DVD by the recording method that records information on the recording layer (that is, the recording method adopted by DVD recorders) is recorded on the first-generation DVD player and the second-generation DVD player. I can't play both!

[0009] The present invention has been made in view of the problems exemplified above, and the first object of the present invention is encrypted by a recording method in which information is recorded on an information recording medium by irradiation with a light beam. It is an object of the present invention to provide an information recording medium that makes it possible to reproduce the information recorded by more types of information reproducing apparatuses.

[0010] The second problem of the present invention is that even when information is recorded on an information recording medium by irradiation of an information power light beam encrypted by CSS, this information is stored. An object of the present invention is to provide an information recording medium that can be reproduced by more types of information reproducing apparatuses. [0011] The third problem of the present invention is that the information power encrypted by CSS is recorded even when the information is recorded on the DVD by the irradiation of the light beam. An object of the present invention is to provide an information recording medium that can be played back by both a generation DVD player and a second generation DVD player.

[0012] A fourth problem of the present invention is that information recorded by being encrypted by a recording method in which information is recorded on an information recording medium by irradiation with a light beam is reproduced by more types of information reproducing apparatuses. Another object of the present invention is to provide an information recording medium that can be used to prevent duplication of recorded information.

Means for solving the problem

In order to solve the above problems, a first information recording medium of the present invention includes a disk-shaped substrate, a recording layer formed on the substrate, a lead-in area formed on the recording layer, A data area located on the outer side of the substrate in the radial direction from the lead-in area and formed on the recording layer; a first embossed pit area formed in the lead-in area; and a data area A first embossed pit area formed in the data area located outside the first wobble area in the radial direction of the substrate, and the second embossed pit area. A second wobble area formed outside the substrate in the data area, and a first emboss pit area having an embossed pit, and the first wobble area having a wobble area. Are formed, no emboss pits are formed, emboss pits are formed in the second emboss pit area, and no wobbles are formed, and no wobble is formed in the second wobble area. A wobble is formed and an embossed pit is formed.

In order to solve the above problems, a second information recording medium of the present invention includes a disk-shaped substrate, a recording layer formed on the substrate, a lead-in area formed on the recording layer, A data area located on the outer side of the substrate in the radial direction from the lead-in area and formed on the recording layer; a first embossed pit area formed in the lead-in area; and a data area A first embossed pit area formed in the data area located outside the first wobble area in the radial direction of the substrate, and the second embossed pit area. The data area located outside the substrate in the radial direction A second wobble area formed in the region, the first embossed pit area is formed with an embossed pit, the first wobbled area is formed with a wobble, and an embossed pit is formed. In addition, a wobble is formed in the second embossed pit region, and has a phase that is 180 degrees different from the phase of the waveform drawn by the wobble, and the amplitude is approximately twice the amplitude of the wobble. An embossed pit array arranged so as to draw a waveform is formed, a wobble is formed in the second wobble area, and an embossed pit is formed.

[0015] These effects and other advantages of the present invention will become apparent from the embodiments described below.

Brief Description of Drawings

FIG. 1 is an explanatory diagram showing an appearance, a cross section, and a recording area structure of an information recording medium according to an embodiment of the present invention.

2 is an explanatory diagram showing details of a recording area structure of the information recording medium in FIG. 1 and embossed pit rows and wobbles formed in the recording area of the information recording medium.

FIG. 3 is an explanatory diagram showing a wobbling group and a land pre-pit formed in the first wobble area.

FIG. 4 is an explanatory view showing a wobbling embossed pit row and a modified embossed pit row formed in a wobbling embossed pit region of a first embossed pit region.

FIG. 5 is an explanatory view showing a wobbling embossed pit row and a modified embossed pit formed in a wobbling embossed pit region of a first embossed pit region.

FIG. 6 is an enlarged perspective view showing a portion where a straight embossed pit region is formed in an information recording medium.

FIG. 7 is a cross-sectional view of the information recording medium 1 as viewed from the direction indicated by arrows A—A in FIG.

FIG. 8 is an explanatory diagram showing information recorded as embossed spots in each of the first embossed pit area and the second embossed pit area.

FIG. 9 is an explanatory diagram showing functions of the information recording medium according to the embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a modification of the information recording medium according to the embodiment of the present invention.

FIG. 11 is a cross-sectional view showing an embossed pit in FIG. Explanation of symbols

1 Information recording media

2 Board

3 Recording layer

11 Lead-in area

12 User data area (data area)

21 1st embossed pit area

21A, 23A Straight embossed pit area

21B, 23B Wobbling embossed pit area

22 First wobble area

23 2nd embossed pit area

24 Second wobble area

31, 34 Straight embossed pit 歹 [J

32, 35 wobbling embossed pit rows

33, 36 Wobbling Gunoleve

43 Deformed embossed pit row

44 Deformed embossed pit

51 Embossed pit

61 ECC block

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described for each embodiment in order with reference to the drawings.

[0019] (Outline of information recording medium)

FIG. 1 shows an information recording medium according to an embodiment of the present invention.

The information recording medium 1 in FIG. 1 can record information such as content data and control information, and can hold it. The information recording medium 1 includes a read-only area where information cannot be added or rewritten, and a recordable area where information can be additionally written. In this respect, the information recording medium 1 is a so-called hybrid type information recording medium. The

[0021] In the reproduction-only area, information is recorded as embossed pits. The embossed pits are formed by using, for example, a stamper during the manufacturing process of the information recording medium 1. Therefore, when the information recording medium 1 is shipped, some information is already recorded in the read-only area. In the read-only area, information other than the information already recorded cannot be added, information already recorded cannot be deleted, and information already recorded cannot be rewritten. The first embossed pit area 21 and the second embossed pit area 23 described later correspond to the read-only area.

On the other hand, information can be recorded as marks in the recordable area. The mark can be formed by irradiating the recording layer 3 of the information recording medium 1 with a light beam from an optical pickup of an information recording apparatus such as a DVD recorder. When the information recording medium 1 is shipped, no such mark is normally recorded in the recordable area. At the time of shipment of the information recording medium 1, wobbles and land prepits (LPP) are formed in the recordable area. The first wobble area 22 and the second wobble area 24 described later correspond to the recordable area.

[0023] (Physical structure of information recording medium)

The middle part of FIG. 1 shows the cross section of the information recording medium 1 with the central force of the information recording medium 1 and the outer peripheral edge. As shown in the middle part of FIG. 1, the information recording medium 1 includes a disk-shaped substrate 2, a recording layer 3 formed on the substrate 2, and a dummy substrate 4 formed on the recording layer 3. .

[0024] The material, shape, radius and thickness of the substrate 2 are the same as the material, shape, radius and thickness of the DVD substrate, respectively.

[0025] The recording layer 3 is formed of an organic dye layer, even if the deviation between the read-only area and the recordable area is! /. The specific material, radius, and thickness of the organic dye layer are the same as the material, radius, and thickness of the DVD-R dye layer in both the read-only area and the recordable area.

The material, shape, radius and thickness of the dummy substrate 4 are the same as the material, shape, radius and thickness of the DVD substrate, respectively. [0027] Note that, as with DVD-R, a reflective layer, a protective layer, an adhesive layer, and the like are formed between the recording layer 3 and the dummy substrate 4. These are not shown in FIG. is doing.

[0028] In the present embodiment, the recording layer 3 of the information recording medium 1 is formed of an organic dye layer, and information can be additionally recorded in a recordable area like a DVD-R. Take the case where rewriting cannot be performed as an example. However, the present invention is not limited to this. The recording layer 3 of the information recording medium 1 may be formed of a phase change layer so that information can be added and rewritten in the recordable area like a DVD-RW.

The lower part of FIG. 1 shows the structure of the recording area formed on the recording layer 3 of the information recording medium 1. As shown in the lower part of FIG. 1, a lead-in area 11, a user data area 12, and a lead-out area 13 are formed on the recording layer 3. The lead-in area 11 is located on the radially inner side of the substrate 2. The user data area 12 is located outside the lead-in area 11 in the radial direction of the substrate 2. The lead-out area 13 is located outside the user data area 12 in the radial direction of the substrate 2. The lead-in area 11 and the user data area 12 are adjacent to each other, and the user data area 12 and the lead-out area 13 are adjacent to each other.

[0030] The lead-in area 11 is an area for recording information relating to the information recording medium itself, information relating to information encryption, information relating to control of the information recording apparatus or information reproducing apparatus, and the like. Information relating to the information recording medium itself includes information (for example, media ID) indicating the type of the information recording medium. Information related to information encryption includes information necessary for encrypting information such as content data to be recorded in the user data area 12 using CSS. The information related to the control of the information recording device or the information reproducing device includes information for setting the optimum power of the light beam to be irradiated, for example, the optical pickup force of the disk drive provided in the DVD recorder.

[0031] The user data area 12 is an area for the user to record information such as content data using a DVD recorder or the like. The file system is also usually recorded in the user data area 12.

The lead-out area 13 is an area for recording control information or management information.

[0033] Further, as shown in the lower part of FIG. 21 is formed. In the user data area 12, a first wobble area 22, a second emboss pit area 23 and a second wobble area 24 are formed. The first embossed pit area 21, the first wobble area 22, the second embossed pit area 23 and the second wobble area 24 are continuously formed on the recording layer 3.

The first wobble area 22 is located at the beginning of the user data area 12. The first wobble area 22 extends over the boundary position P1 between the lead-in area 11 and the user data area 12 and extends toward the lead-in area 11, and the leading portion of the first wobble area 22 is the lead-in area. It is formed in region 11. That is, the first wobble area 22 is formed so that the end partial force of the lead-in area 11 also extends over the start portion of the user data area 12. In the first wobble area 22, the size of the portion formed in the lead-in area 11 is, for example, equal to the size of an ECC (Error Correcting Code) block (32 kilobytes). In the lead-in area 11, the first embossed pit area 21 and the first wobble area 22 are adjacent to each other.

The second embossed pit area 23 is located on the outer side in the radial direction of the substrate 2 than the first wobble area 22. The first wobble area 22 and the second embossed pit area 23 are adjacent to each other.

The second wobble area 24 is located on the outer side in the radial direction of the substrate 2 with respect to the second embossed pit area 23. The second embossed pit area 23 and the second wobble area 24 are adjacent to each other.

The upper part in FIG. 2 shows the recording area structure of the information recording medium 1. This is the same as the recording area structure shown in the lower part of Fig. 1. The middle part of Fig. 2 shows the recording area structure shown in the upper part of Fig. 2 in more detail.

[0038] As shown in the middle of FIG. 2, the first embossed pit area 21 includes a straight embossed pit area 21A and a wobbling embossed pit area 21B. The wobbling embossed area 21B is formed immediately before the first wobble area 22. That is, the double emboss pit area 21B is located at the end of the first emboss pit area 21, and the double emboss pit area 21B and the first wobble area 22 are adjacent to each other. The size of the double embossing pit area 21B is, for example, equal to the size of 1 ECC block! / ヽ. Within the first embossed pit area 21, the area other than the wobbling embossed pit area 21B is a straight embossed pit area 21A. [0039] As shown in the middle of FIG. 2, the second embossed pit area 23 includes a straight embossed pit area 23A and a wobbling embossed pit area 23B. The wobbling boss pit area 23B is formed immediately before the second wobble area 24. That is, the wobbling emboss pit area 23B is located at the end of the second emboss pit area 23, and the wobbling emboss pit area 23B and the second wobble area 24 are adjacent to each other. The size of the wobbling emboss pit area 23B is, for example, equal to the size of 1ECC block. In the second embossed pit area 23, the area other than the wobbling embossed pit area 23B is a straight embossed pit area 23A.

[0040] In addition, the starting end P2 of the straight embossed pit region 23A is located on the inner side in the radial direction of the substrate 2 from a position approximately 24 mm away from the center PO of the substrate 2 toward the outer side in the radial direction of the substrate 2. The end P3 of the straight embossed pit region 23A is located on the outer side in the radial direction of the substrate 2 from a position approximately 28 mm away from the center PO of the substrate 2 toward the outer side in the radial direction of the substrate 2.

[0041] It should be noted that the starting end P2 is preferably located on the inner side in the radial direction of the substrate 2 from a position just 24 mm away from the center PO of the substrate 2 toward the outer side in the radial direction of the substrate 2. It is desirable that the substrate 2 is located on the radially outer side of the substrate 2 rather than a position just 28 mm away from the center PO of the substrate 2 toward the radially outer side of the substrate 2. However, considering the eccentricity of the disk, etc., it is just 24mm away from the center PO of the board 2 toward the outside of the board 2 in the radial direction, or just from the center PO of the board 2 to the outside of the board 2 in the radial direction. It may be difficult to determine precisely 28mm away. In this case, the position of the start end P2 or the position of the end P3 may slightly shift in the radial direction of the substrate 2.

The lower part of FIG. 2 shows embossed pit rows and wobbling groups formed in the recording area on the recording layer 3.

As shown in the lower part of FIG. 2, embossed pits are formed in the first embossed pit region 21.

More specifically, a straight embossed pit row 31 is formed in the straight embossed pit region 21 A in the first embossed pit region 21. In other words, the embossed pit is formed in the straight embossed area 21A, and no wobble is formed. . The straight embossed pit row 31 extends substantially linearly along the track (that is, gently curves with the same curvature as that of the track).

A wobbling emboss pit row 32 is formed in a wobbling emboss pit region 21 B in the first emboss pit region 21. That is, embossed pits are formed in the wobbling embossed pit area 21B, and wobbles are formed. The wobbling embossed pit row 32 extends along the track, but vibrates (meanders) in the radial direction of the substrate 2 with a predetermined period and a predetermined amplitude. The wobble period of the wobbling emboss pit row 32 is the same as the wobble period of the wobbling group 33 formed in the wobble area 22. Also, the wobble amplitude of the wobbling emboss pit row 32 is twice the wobble amplitude of the wobbling group 33. Furthermore, the wobbling emboss pit row 32 and the wobbling group 33 are connected so that both wobbles are continuous!

On the other hand, a wobbling group 33 is formed in the first wobble area 22. That is, the wobble is formed in the first wobble area 22 and the emboss pit is not formed. The wobbling group 33 extends along the track, but vibrates (meanders) in the radial direction of the substrate 2 with a predetermined period and a predetermined amplitude.

On the other hand, embossed pits are formed in the second embossed pit region 23.

More specifically, a straight embossed pit row 34 is formed in the straight embossed pit region 23 A in the second embossed pit region 23. That is, in the straight embossed area 23A, embossed pits are formed and wobbles are not formed, as in the straight embossed pit area 21A.

In a wobbling emboss pit area 23B in the second emboss pit area 23, a wobbling emboss pit array 35 is formed. That is, in the wobbling emboss pit area 23B, emboss pits are formed and wobbles are formed in substantially the same manner as the wobbling emboss pit area 21B. The wobble period of the wobbling emboss pit row 35 is the same as the wobble period of the wobbling group 36 formed in the wobble area 24. In addition, the wobble amplitude of the wobbling emboss pit train 35 is twice the wobble amplitude of the wobbling group 36. In addition, the wobbling emboss pit row 35 and The wobbling group 36 is connected so that both wobbles are continuous!

On the other hand, a wobbling group 36 is formed in the second wobble region 24. That is, the wobble is formed in the second wobble area 24 and the emboss pit is not formed. The wobble period and amplitude of the wobble group 36 are the same as the wobble period and amplitude of the wobble ring group 33 formed in the wobble area 22, respectively.

FIG. 3 shows a wobbling group and a land replica formed in the first wobble area 22. As shown in FIG. 3, lands 41 are formed between two wobbling groups 33 adjacent to each other in the radial direction of the substrate 2 in the first wobble region 22. Land 41 has land prepits 42 formed therein. The rules, structure, and functions related to the layout of the land prepit 42 are the same as the rules, structure, and functions related to the layout of the land prepit in DVD-R.

Also in the second wobble region 24, lands are formed between two wobbling groups 36 adjacent to each other in the radial direction of the substrate 2, and land prep is formed on the lands. ing.

FIG. 4 shows a wobbling emboss pit row and a modified emboss pit row formed in the wobbling emboss pit region 21B. As shown in FIG. 4, in the wobbling emboss pit area 21, a deformed emboss pit row 43 is formed. The deformed embossed pit row 43 moves the position of one or more embossed pits constituting a part of the wobbling embossed pit row 32 in the radial direction of the substrate 2 by a distance smaller than, for example, the track pitch. Is formed by. In other words, the modified embossed pit row 43 has one or a plurality of embossed pits constituting a part of the wobbling boss pit row 32, and a predetermined position (for example, an intermediate position) between two adjacent wobbling embossed pit rows 32 It is formed by moving to). The modified embossed pit row 43 is formed so as to generate a reproduction waveform that can be recognized as a land pre-pit, and performs the same function as the land pre-pit. The rules for the arrangement of the modified embossed pit row 43 are the same as the rules for the arrangement of land prepits in DVD-R.

[0054] Further, the wobbling emboss pit area 23B is also included in the wobbling emboss pit area 23B. A modified embossed pit row is formed in the same manner as in FIG.

It should be noted that the modified embossed pit row 43 shown in FIG. 4 is a structure that functions as a land prepit as described above, but the structure that functions as a land prepit is not limited thereto. For example, as shown in FIG. 5, a deformed emboss pit 44 is formed by deforming the shape of one or a plurality of emboss pits constituting a part of the wobbling emboss pit row 32, and the land emboss pit 44 is formed. You may use as a structure which functions as a pit.

FIG. 6 shows an enlarged portion of the information recording medium 1 where the straight embossed pit region 21A is formed. FIG. 7 shows a cross section of the portion of the information recording medium 1 as viewed from the direction indicated by arrows A—A in FIG.

As shown in FIG. 6 or FIG. 7, a recording layer 3, a reflective layer 5, a protective layer 6 and an adhesive layer 7 are sequentially laminated on the substrate 2 of the information recording medium 1, and on the adhesive layer 7 A dummy substrate 4 is provided. The recording layer 3 is formed of an organic dye layer such as an organic dye material. This structure is the same as that of DVD-R.

[0058] In the straight embossed pit region 21A, a straight embossed pit row 31 is formed in the recording layer 3. The straight embossed pit row 31 is an array of embossed pits 51, 51,. A non-pit portion 52 is formed between two embossed pits 51 adjacent to each other in the extending direction of the track T !. As shown in FIG. 7, the inside of the non-pit portion 52 is filled with the organic dye material of the recording layer 3.

[0059] Wobbling embossed pit row 32 in wobbling embossed pit region 21B and modified embossed pit row 43, straight embossed pit row 34 in straight embossed pit region 23A, wobbling embossed in wobbling embossed pit region 23B The arrangement of individual embossed pits and individual non-pit parts is the same as that of embossed pits 51 and non-pit parts 52 in straight embossed pit string 31 although the arrangement of pit string 35 and modified embossed pit string is also different. .

[0060] The information recording medium 1 is manufactured as follows, for example. First, straight embossed pit row 31, wobbling embossed pit row 32, modified embossed pit row 43, wobbling group 33, straight embossed pit row 34, wobbling embossed pit row 35, modified embossed pit row, wobbling group Corrugations corresponding to each of 36 are recorded on the recording layer 3 on the substrate 2. It forms on the contact surface which contacts using a stamper.

Next, an organic dye material is applied to the contact surface of the substrate 2 on which the unevenness is formed. Thereby, the recording layer 3 is formed on the contact surface, the convex portion of the contact surface becomes an embossed pit, and the concave portion of the contact surface becomes a non-pit portion by filling the inside with an organic dye material.

Next, the reflective layer 5 and the protective layer 6 are formed on the recording layer 3.

Next, the adhesive layer 7 is applied on the protective layer 6, and the structure on which the substrate 2, the recording layer 3, the reflective layer 5, and the protective layer 6 are formed is bonded to the dummy substrate 4 with the adhesive layer 7. .

Next, DC writing is performed by irradiating the embossed pit areas 21 and 23 of the information recording medium 1 assembled in this way with a light beam having a DC waveform. As a result, the refractive index of the organic dye material (recording layer 3) in the emboss pit regions 21 and 23 can be increased, and the reading accuracy of the emboss pits formed from the organic dye material can be improved.

In FIG. 6, the recording layer 3, the reflective layer 5, the protective layer 6, the adhesive layer 7, and the dummy substrate 4 are shown in a transparent state. In each of FIGS. 6 and 7, the light beam from the optical pickup is irradiated in the direction indicated by the arrow B. In FIG. 6 and FIG. 7, since the surface irradiated with the light beam faces downward in the information recording medium 1, the embossed pit 51 is convex and the non-pit portion 52 is concave.

[0066] (Information recorded in the embossed pit area)

The upper part of FIG. 8 shows details of the recording area structure of the information recording medium 1, which is almost the same as the recording area structure shown in the middle part of FIG. The lower part of FIG. 8 shows information recorded as emboss pits in the first embossed area 21 and the second embossed pit area 23, respectively.

[0067] In the first embossed pit area 21 and the second embossed pit area 23, information is recorded as embossed pits. The emboss pit is formed using a stamper in the manufacturing process of the information recording medium 1, for example. Therefore, information is already recorded in the first embossed pit area 21 and the second embossed pit area 22 when the information recording medium 1 is shipped.

[0068] The information recorded as the embossed pits in the first embossed pit area 21 includes at least part of the information related to the information encryption key. [0069] Note that the information recorded as the embossed pits in the first embossed pit area 21 may include all of the information related to the information encryption key 匕. Information recorded as the embossed pit in the first embossed pit area 21 is recorded in the lead-in area 11 such as information on the information recording medium itself (for example, media ID) and information on the control of the information recording apparatus or information reproducing apparatus Include some or all of the information you need.

[0070] The first emboss pit area 21 has a size that is an integral multiple of the size of one ECC block. Information relating to information encryption is recorded in the first embossed pit area 21 in a state of being divided into a plurality of ECC blocks 61, 61,... As shown in the lower part of FIG. In other words, a plurality of ECC blocks 61, 61,... Are continuously arranged in the first embossed pit area 21.

However, as shown in the lower part of FIG. 8, the block of information recorded at the beginning of the first embossed pit area 21 is not a complete ECC block. The block of information recorded at the head portion of the first embossed pit area 21 is only the remaining portion 61B obtained by removing the head portion 61A from the complete ECC block 61. That is, the information recorded in the leading portion of the first embossed pit area 21 is information following the predetermined information constituting the leading portion 61 A of the ECC block 61.

[0072] Furthermore, the block of information recorded at the end of the first embossed pit area 21 is not a complete ECC block. The block of information recorded at the end portion of the first embossed pit area 21 is only the head portion 61 A of the ECC block 61. That is, the information recorded as the emboss pit in the end portion of the first emboss pit area 21 (partial area in the first emboss pit area 21 located immediately before the first wobble area 22) is the head part of the ECC block 61. 61 A is predetermined information constituting A.

[0073] The predetermined information constituting the leading portion 61A of the ECC block 61 includes at least a sector ID. More specifically, the predetermined information constituting the leading portion 61A of the ECC block 61 includes, for example, a sector ID, IED (ID Error Detection code), CPR—MAI (Copyright Management Information), and the like. The size m (see FIG. 8) of the leading portion 61A of the ECC block 61 is, for example, 16 bytes.

On the other hand, the information recorded as the embossed pits in the second embossed pit area 23 is almost Zero data. That is, in the second emboss pit area 23, for example, management information such as Sync code, sector ID, error correction code, etc., and data in which control information is added to zero data are recorded as emboss pits.

It should be noted that some content data having utility value may be recorded in the second emboss pit area 23 instead of zero data.

[0076] The second embossed pit area 23 has a size that is an integral multiple of the size of one ECC block. Zero data or the like is recorded in the second embossed pit area 23 in a state of being divided into a plurality of ECC blocks 61, 61,... As shown in the lower part of FIG. That is, a plurality of ECC blocks 61, 61,... Are continuously arranged in the second embossed pit area 23.

However, as shown in the lower part of FIG. 8, the information block recorded in the head portion of the second embossed pit area 23 is changed from the complete ECC block 61 to the head portion 61A (for example, 16 bytes). Only the remaining 61B is removed. That is, the information recorded in the leading portion of the second embossed pit area 23 is information following the predetermined information constituting the leading portion 61 A of the ECC block 61.

Furthermore, the information block recorded in the end portion of the second embossed pit area 23 is only the start portion 61 A (for example, 16 bytes) of the ECC block 61. In other words, the information recorded as the emboss pit in the end portion of the second emboss pit area 23 (partial area in the second emboss pit area 23 located immediately before the second wobble area 24) is the head part of the ECC block 61. 61 A is predetermined information constituting A. This predetermined information includes at least a sector ID, and more specifically includes, for example, a sector ID, IED, CPR-MAI, and the like.

[0079] (Address information prerecorded on information recording medium)

The tracks formed in the first embossed pit area 21, the first wobbled area 22, the second embossed pit area 23, and the second wobbled area 24, respectively, start from the beginning of the first embossed pit area 21 and end of the second wobbled area 24. The address information is recorded in advance according to the CLV (Constant Linear Velocity) format. The address information is recorded as embossed pits in the first embossed pit area 21 and the second embossed pit area 23. In the first wobbled area 22 and the second wobbled area 24, the land prepit is recorded. It is recorded as.

[0080] (Function of information recording medium)

FIG. 9 shows the functions of the information recording medium 1 for each divided recording area.

As shown in the lower part of FIG. 9, the first embossed pit area 21 has a copy prevention function.

The first wobble area 22 has a file system appending function. The straight embossed pit area 23A has a media type discrimination function. The second wobble area 24 has a content data appending function. The wobbling embossed pit areas 21B and 23B each have a recording control auxiliary function.

[0082] In the following, an example of a usage mode of the information recording medium 1 will be given, and the function of the information recording medium 1 described above will be described in an example of the usage mode.

First, the file system additional function for the first wobble area 22, the content data additional function for the second wobble area 24, and the media type discrimination function for the straight emboss pit area 23A will be described.

[0084] The outline of the usage mode of the information recording medium 1 taken up here is as follows. That is, the information recording medium 1 in which no information (except information formed by wobble and land prepits) is recorded in at least the first wobble area 22 and the second wobble area 24 is sold to the user. The user purchases the information recording medium 1 and records content data such as a movie or a television program on the information recording medium 1 using a DVD recorder. When this content data is recorded on the information recording medium 1, the content data is encrypted by CSS. That is, content data encrypted by CSS is recorded on the information recording medium 1. The content data recorded on the information recording medium 1 can be played back by, for example, the above-described first generation DVD player or second generation DVD player by the media discrimination function of the information recording medium 1 or the like. However, the encryption by CSS can prevent the content data recorded on the information recording medium 1 from being duplicated on other information recording media.

[0085] Now, the usage mode of the information recording medium 1 will be described in more detail.

First, for example, the following state is set in each divided recording area of the information recording medium 1 before the information recording medium 1 is shipped or sold. That is, the first embossed spin The area 21 stores at least information about the media ID and the information encryption key. This media ID indicates that the media type is DVD-ROM. Further, the information related to the information encryption key includes encryption information unique to the information recording medium 1.

[0087] On the other hand, although wobbles and land pre-pits are formed in the first wobble area 22, no information is recorded (that is, no marks are formed on the wobbling group. Nah,) For example, zero data is recorded in the second embossed pit area 22 and V. In the second wobble area 24, wobbles and land prepits are formed, but no information is recorded (that is, no marks are formed on the wobbling group).

[0088] The information recording medium 1 set in such a state is sold, and the user purchases the information recording medium 1. Then, the user records content data such as a movie or a TV program on the information recording medium 1 using a DVD recorder.

That is, the user inserts information recording medium 1 into the DVD recorder, and inputs an instruction to start recording content data to the DVD recorder. In response to this, the DVD recorder starts processing for recording content data input from the outside in the second wobble area 24 of the information recording medium 1 (hereinafter referred to as “content data recording processing”).

[0090] The second wobble area 24 is a recordable area. In the content data recording process, the DVD recorder can record content data in the second wobble area 24. In addition, the wobble and land pre-pit formed in advance in the second wobble area 24 are used to control the rotation of the information recording medium 1, positioning for information recording, address information acquisition, etc. in the content data recording process by the DVD recorder. Used for. This is the content data appending function of the second wobble area 24.

Further, this DVD recorder has a function of encrypting content data by CSS and recording it on the information recording medium 1. In the content data recording process, the DVD recorder reads the encryption key information recorded in advance in the first embossed pit area 21 and encrypts the content data by CSS using this encryption key information. As a result, the second wobble area 24 is encrypted from the CSS using encrypted information unique to the information recording medium 1. The recorded content data is recorded (added).

[0092] When the content data recording process is completed and the user inputs an instruction to finalize the information recording medium 1 to the DVD recorder, the DVD recorder finalizes the information recording medium 1 (hereinafter referred to as " “Finalize process” and “.) Start.

[0093] The first wobble area 22 is a recordable area. The first wobble area 22 is located at the top of the user-one data area 12. This position coincides with the position where the file system should be recorded on DVD-R. For example, at the boundary position P1 between the lead-in area 11 and the user data area 12, an address of 30000M hex is set. The first wobble area 21 includes this position P1. Therefore, in the finalization process, the DVD recorder can generate a file system and record (append) the file system from the position P1 in the first wobble area 22. In addition, the wobble and land prepit formed in advance in the first wobble area 22 are used to control rotation of the information recording medium 1, positioning for information recording, in finalization processing (file system recording processing) by a DVD recorder. Used for address information acquisition. This is the file system append function for the first wobble area 22.

[0094] The first wobble area 22 further has a feature related to a file system additional recording function.

That is, the first wobble area 22 extends over the boundary position P1 between the lead-in area 11 and the user data area 12 and extends toward the lead-in area 11 side. When recording the file system, the DVD recorder records the file system from the position P1 in FIG. 9 toward the end of the first wobble area 22. However, an abnormal situation may occur due to the inclination of the information recording medium 1 and the recording start position of the file system may be shifted inward in the radial direction of the substrate 2 from the position P1. Even when such an abnormal situation occurs, since the first wobble area 22 is expanded radially inward of the substrate 2, the DVD recorder can record the shifted recording start position force file system. In other words, even if the recording start position of the file system is shifted inward in the radial direction of the substrate 2 from the position P1 due to an abnormal situation, the shifted recording start position enters the first embossed pit area 21. There is nothing. Note that the start of file system recording also starts immediately before the position at which the file system recording starts (position P1 under normal conditions) at the start of the first wobble area 22. Zero data is recorded immediately before the hour.

Now, after the finalizing process for the information recording medium 1 is completed, the user takes out the information recording medium 1 with a DVD recorder. Then, in order to reproduce the content data recorded on the information recording medium 1, the information recording medium 1 is inserted into the second generation DVD player.

[0096] The second-generation DVD player performs media type determination processing on the inserted information recording medium. As a result of the media type discrimination process, the second generation DVD player has a recordable DVD as the type of the information recording medium inserted (media type), and the content data recorded on the parenthesis information recording medium is not recorded. When encrypted using an encryption method other than CPRM, this information recording medium is assumed to be a DV D that may have been illegally copied, and the content data recorded on this information recording medium is reproduced. It will be rejected (eg ejected). In addition, as a result of the media type discrimination process, the second-generation DVD player is a read-only DVD (DVD-ROM), and the content data recorded on this information recording medium is the type of information recording medium inserted. When the data is encrypted by the CSS encryption method, the reproduction of the content data recorded on the information recording medium is permitted.

[0097] The second-generation DVD player performs the media type determination process in the following procedure, for example. When the information recording medium is inserted into the second generation DVD player, first, the second generation DVD player reads the media ID from the inserted information recording medium. Next, the second generation DV D player irradiates a predetermined area (hereinafter referred to as “media type discrimination area”) of the recording layer of the inserted information recording medium with a light beam, and enters the media type discrimination area. Detects whether the wobble is formed or not. This media type discriminating area is located approximately 24 mm away from the center of the information recording medium outward in the radial direction of the information recording medium, and approximately 28 mm away from the center of the information recording medium outward in the radial direction of the information recording medium. It is arranged within the range up to the position.

[0098] When the media ID indicates DVD-ROM and no wobble is formed in the media type discrimination area, the second generation DVD player uses the DVD-ROM as the inserted information recording medium. Judge that there is. On the other hand, a recordable DVD (D VD—R, DVD—RW, etc.) and a wobble is formed in the media type discrimination area, the second generation DVD player indicates that the inserted information recording medium is a recordable DVD. to decide.

Now, when the information recording medium 1 is inserted into the second generation DVD player by the user, the second generation DVD player performs media type determination processing on the information recording medium 1. That is, the second generation DVD player first reads the media ID recorded in the first embossed pit area 21 of the information recording medium 1. Next, the second generation DVD player irradiates the media type discrimination area of the information recording medium 1 with the light beam, and detects whether or not a wobble is formed in the media type discrimination area.

[0100] The media ID recorded in the first embossed pit area 21 indicates that the media type is DVD-ROM.

[0101] Further, as shown in FIG. 2, the starting end P2 of the straight embossed pit region 23A is a radius of the substrate 2 that is approximately 24 mm away from the center PO of the substrate 2 toward the radially outer side of the substrate 2. Located inside the direction. The end P3 of the straight embossed pit region 23A is located on the outer side in the radial direction of the substrate 2 from the position approximately 28 mm away from the center PO of the substrate 2 toward the outer side in the radial direction of the substrate 2. Thus, the straight embossed pit area 23A completely includes the media discrimination area. Further, no wobble is formed in the straight embossed pit area 23A. As a result, a wobble is formed in the medium discriminating area of the information recording medium 1.

[0102] Therefore, in the second generation DVD player, as a result of the media type determination processing for the information recording medium 1, the media ID indicates DVD-ROM and no wobble is formed in the media type determination area. Get results. Based on this result, the second generation DVD player determines that the information recording medium 1 is a DVD-ROM. That is, the information recording medium 1 has a recordable area (the first wobble area 22 and the second wobble area 24) and is not a DVD-ROM, but a DVD— It is determined to be ROM.

[0103] In the information recording medium 1, the straight embossed pit area 23A force is placed in a place completely including the S media type discriminating area, and the straight embossed pit area 23A There is no wobble in it. With such a configuration, one of the conditions for making the second generation DVD player recognize the information recording medium 1 as a DVD-ROM is created. This is the media type discrimination function for the straight embossed pit area 23A.

Subsequently, when the user inputs an instruction to start playback of the content data to the second generation DVD player, the second generation DVD player responds to the content recorded on the information recording medium 1 in response to the instruction. Play the data. When reproducing the content data recorded on the information recording medium 1, the second generation DVD player decrypts (decrypts) the content data encrypted by CSS. Since it is normal that the content data recorded on the DVD—ROM is encrypted by CSS, the 2nd generation DVD player is the content recorded on the information recording medium 1 encrypted by CSS. It allows proper reproduction of data.

Next, the recording control auxiliary function of the wobbling emboss pit area 21B will be described.

As shown in FIG. 9, by providing a wobbling embossed pit area 21B, the DVD recorder uses a light beam from the first embossed area 21 for the content data recording process and the like. When the track is scanned toward the area 22, the rotation of the information recording medium 1 based on wobble and positioning for information recording based on wobble and land prepits can be performed with high accuracy.

That is, as shown in FIG. 2, the force wobble in which the embossed pit is formed is not formed in the straight embossed pit region 21A. For this reason, the DVD recorder performs rotation control of the information recording medium 1 based on the control information recorded as the straight emboss pit row 31 in the straight emboss pit area 21A. On the other hand, in the first wobble area 22, emboss pits are not formed, but wobbles are formed. For this reason, the DVD recorder performs rotation control of the information recording medium 1 and positioning for information recording based on the wobble in the first wobble area 22. In this way, the DVD recorder performs rotation control and the like in different ways in the straight embossed pit area 21A and the first wobble area 22. As a result, when the DVD recorder continuously scans from the straight embossed pit area 21A to the first wobble area 22, the rotation control method is switched. It is desirable that there is a preparation period (running period). The wobbling emboss pit area 21B is an area for creating this preparation period.

That is, a wobbling emboss pit row 32 and a modified emboss pit row 43 are formed in the wobbling emboss pit region 21B. Therefore, the DVD recorder can generate a clock signal for rotation control, a timing pulse signal for information recording, and the like based on the wobble of the wobbling emboss pit row 32 and the modified emboss pit row 43. Furthermore, the wobble cycle of the wobbling emboss pit row 32 and the wobble cycle of the wobbling darup 33 are the same, and the wobbling emboss pit row 32 and the wobbling group 33 are both continuously wobbled. It is connected. Therefore, the clock signal for rotation control and the timing pulse signal for information recording generated based on the wobble of the wobbling emboss pit row 32 and the modified emboss pit row 43 are the wobble and land pre-pit of the wobbling group 33. Therefore, it is synchronized with the clock signal for rotation control and the timing pulse for information recording. As a result, when the DVD recorder scans a track from the first embossed pit area 21 to the first wobble area 22 using a light beam, the rotation control of the information recording medium 1 based on wobble and the wobble and land pre- Positioning for information recording based on pits can be performed with high accuracy. This is the auxiliary recording control function for the wobbling emboss pit area 21B. The recording control auxiliary function of the wobbling emboss pit area 23B is the same as the recording control auxiliary function of the wobbling emboss pit area 21B.

It should be noted that the wobble amplitude of the wobbling emboss pit row 32 is twice the wobble amplitude of the wobbling group 33. As a result, the following effects can be obtained. DVD recorders use the push-pull method to detect wobbles. In the push-pull method, at least two light receiving elements arranged on one side and the other side of a straight line parallel to the track extension direction are used, and the reflected light of the light beam obtained by these two light receiving elements is used. The signal difference corresponding to the intensity of the signal is calculated, and the wobble is detected based on the calculation result. In the wobbling embossed pit row 32, the ratio of embossed pits to non-pits is 1: 1 (that is, the duty ratio is 50% when the irregularities composed of embossed pits and non-pits are compared to pulse signals) ). Therefore, the wobbling embossed pit row 32 Assuming that the wobble amplitude and the wobble amplitude of the wobbling group 33 are the same, the amplitude of the wobble detection signal obtained from the wobbling emboss pit row 32 is the amplitude of the wobble detection signal obtained from the wobbling group 33. It becomes half of. If the amplitude of the wobble in the wobbling emboss pit row 32 is twice the amplitude of the wobble in the wobbling group 33, the amplitude of the wobble detection signal obtained from the wobbling emboss pit row 32 is The amplitude of the wobble detection signal obtained from the covering group 33 is the same. Based on this concept, the wobble amplitude of the wobbling emboss pit row 32 is set to be twice the wobble amplitude of the wobbling group 33. Thus, when the DVD recorder scans the track from the first embossed pit area 21 to the first wobble area 22 using the light beam, the amplitude of the wobble detection signal does not vary greatly. Therefore, it is possible to perform the rotation control of the information recording medium 1 based on wobble and positioning for information recording based on wobble and land prepits with high accuracy. The same applies to the wobbling emboss pit row 35.

[0110] Next, the anti-duplication function of the first wobble area 21 will be described.

[0111] By providing the first wobble area 21, it is possible to prevent content data and the like from being illegally copied using the information recording medium 1.

[0112] That is, on the information recording medium 1, the user can record content data encrypted by CSS using a DVD recorder. The content data encrypted and recorded on the information recording medium 1 by CSS can be played back on both the first generation DVD and the second generation DVD. Therefore, assuming that the area in which the information (encrypted information) related to the information encryption key is to be recorded in the lead-in area 11 is a recordable area, the encryption key information and the encryption key information are used. Content data encrypted with CSS can be recorded on the information recording medium 1, and this content data can be played back on both 1st and 2nd generation DVDs. End up. As a result, for example, it becomes possible to easily create a copy of a commercial DVD-ROM in which movie content data is encrypted and recorded by CSS using the information recording medium 1.

[0113] However, actually, the lead-in area 11 of the information recording medium 1 has the first embossed pit area. 21 is formed, and information (encryption information) related to the information encryption key is recorded in the first emboss pit area 21 as an emboss pit. For this reason, the user cannot rewrite the encrypted information, delete the encrypted information, or add other encrypted information. Therefore, the encrypted information and the content data encrypted by CSS using this encrypted information cannot be recorded on the information recording medium 1. Therefore, the information recording medium 1 cannot be used to create a commercial DVD—ROM copy in which movie content data is encrypted and recorded with CSS. This is the anti-duplication function of the first wobble area 21.

[0114] As described above, the information recording medium 1 has the second wobble area 24 (recordable area), and the wobble group 36 and the land pre-pits are formed in the second wobble area 24. This configuration is compatible with DVD-R. Therefore, the content data can be recorded (added) on the information recording medium 1 using a DVD recorder having a function of recording the content data on the DVD-R.

[0115] Also, in the first embossed pit area 21, encryption key information used for CSS is recorded. Thus, by providing the DVD recorder with a function of encrypting content data with CSS, the content data encrypted with CSS can be recorded on the information recording medium 1 using this DVD recorder.

Further, the information recording medium 1 has a first wobble area 22 (recordable area), and a wobbling group 33 and land prepits 42 are formed in the first wobble area 22. . Further, the first wobble area 22 is arranged at the top of the user data area 12. That is, in the DVD-R, the first wobble area 22 is arranged in the same area as the area where the file system is to be recorded. As a result, the file system generated in the finalization process can be recorded on the information recording medium 1, and the position where the file system is recorded is the same as the position where the file system is recorded on the DVD-R. can do. Accordingly, a finalizing process can create a recording format suitable for the DVD recording format on the information recording medium 1. As a result, the content data recorded on the information recording medium 1 can be reproduced by a DVD player and a DVD recorder compliant with the DVD standard. Further, the first wobble area 22 extends over the boundary position P 1 between the lead-in area 11 and the user data area 12 and extends toward the lead-in area 11. As a result, even if an abnormal situation occurs due to the inclination of the information recording medium 1 and the recording start position of the file system is shifted inward in the radial direction of the substrate 2 from the position P 1 in FIG. File system can be recorded. This makes it possible to reliably record the file system on the information recording medium 1.

[0118] Further, the information recording medium 1 has a straight embossed pit area 23A, and no wobble is formed in the straight embossed pit area 23A. Further, as shown in FIG. 2, the start end of the straight embossed pit region 23A is located radially inward of the substrate 2 from a position approximately 24 mm away from the center PO of the substrate 2 toward the radially outward side of the substrate 2. The end P3 of the straight embossed pit area 23A is located on the outer side in the radial direction of the substrate 2 from the position approximately 28 mm away from the center PO of the substrate 2 toward the outer side in the radial direction of the substrate 2. As a result, the straight embossed pit area 23A completely includes the media type discrimination area in the second generation DVD player. This allows the second generation DVD player to recognize the information recording medium 1 as a DVD-ROM. Therefore, the content data encrypted by CSS and recorded on the information recording medium 1 can be reproduced by the second generation DVD player. Therefore, according to the information recording medium 1, the content data force encrypted by CSS is recorded on the information recording medium by the irradiation of the light beam (that is, the recording method adopted by the DVD recorder). Even when recorded, this content data can be played back on the 1st generation DVD player and 2nd generation DVD player. That is, according to the information recording medium 1, even if the content data is recorded on the information recording medium by the irradiation of the content data force light beam encrypted by CSS, the content data is recorded. It can be played back by more types of information playback devices.

[0119] The information recording medium 1 has a wobbling emboss pit area 21B. A wobbling emboss pit 32 and a modified emboss pit line 43 are formed in the wobbling emboss pit area 21B. For this reason, in the content data recording process, etc., the DVD recorder is directed from the first embossed pit area 21 to the first wobble area 22 using a light beam. Therefore, when scanning the track, it is possible to perform the rotation control of the information recording medium 1 based on the wobble and the positioning for information recording based on the wobble and the land prepit with high accuracy.

[0120] Further, the information recording medium 1 has a wobbling emboss pit area 23B. In the wobbling emboss pit area 23B, a wobbling emboss pit 35 and a modified emboss pit string are formed. As a result, when the DVD recorder scans a track from the second embossed pit area 23 to the second wobble area 24 using a light beam in content data recording processing or the like, the rotation control of the information recording medium 1 based on the wobble is performed. In addition, positioning for information recording based on wobbles and land prepits can be performed with high accuracy.

[0121] In addition, the information recording medium 1 has a first wobble area 21, and at least a part of information related to information encryption (encrypted information) is recorded as embossed pits in the first wobble area 21. ing. Thereby, the anti-duplication function of the first wobble area 21 as described above is realized. Therefore, it is possible to prevent content data and the like from being illegally copied using the information recording medium 1.

[0122] Also, as shown in FIG. 8, the information recorded in the head portion of the second embossed pit area 23 is information following predetermined information (such as a sector ID) constituting the head portion 61A of the ECC block 61. That is, it is information constituting the remaining part 61B. Thereby, the continuity between the information recorded in the first wobble area 22 and the information recorded in the second emboss pit area 23 can be ensured. Further, the information recorded as the embossed pit at the end portion of the second embossed pit area 23 is predetermined information constituting the leading portion 61 A of the ECC block 61. Thereby, the continuity between the information recorded in the second embossed pit area 23 and the information recorded in the second wobble area 24 can be ensured.

That is, for example, when information a is recorded on the DVD-R, predetermined information (sector ID or the like) constituting the head portion of the next ECC block Φ is recorded at the end portion of the information a. When additional information β is added to this DVD-R, information following the predetermined information constituting the head portion of the ECC block φ, that is, the remaining portion of the ECC block Φ is formed at the head portion of the information β. Record information. These two content data recording processes are completed. After that, in the DVD-R, the leading portion of the ECC block Φ recorded at the end portion of the information ex and the remaining portion of the ECC block Φ recorded at the beginning portion of the information β are connected to form one ECC. Block Φ is formed. In this way, continuity between the information recorded on the DVD-R for the first time and the information recorded for the second time is ensured.

[0124] If the content data recording rule regarding DVD-R can be applied to information recording medium 1, compatibility between information recording medium 1 and DVD-R can be achieved. it can. Therefore, in order to secure the continuity of information near the boundary between the first wobble area 22 and the second emboss pit area 23, the head part of the ECC block 61 is located at the head part of the second emboss pit area 23. Information following the predetermined information constituting A, that is, information constituting the remaining portion 61B of the ECC block 61 is recorded in advance. In addition, in order to ensure the continuity of information near the boundary between the second embossed pit area 23 and the second wobbled area 24, the last part of the second embossed pit area consists of the leading part 61A of the ECC block 61. Record the information you want to do in advance.

Further, as shown in FIG. 8, the information recorded in the head portion of the first embossed pit area 21 is information following the predetermined information constituting the head portion 61 A of the ECC block 61, that is, the ECC block 61. This is information constituting the remaining portion 61B. As a result, it is possible to ensure continuity between the information recorded in the area located on the radially inner periphery side of the substrate 2 with respect to the first embossed pit area 21 and the information recorded in the first embossed pit area 21. .

[0126] Information recorded as an emboss pit in the end portion of the first emboss pit area 21 is predetermined information constituting the start portion 61A of the ECC block 61. Thereby, continuity between the information recorded in the first embossed pit area 21 and the information recorded in the first wobble area 22 can be ensured.

[0127] Also, the first embossed pit area 21, the first wobbled area 22, the second enbossed pit area 23, and the second wobbled area 24 of the information recording medium 1 each have a first embossed pit area. 21 Starting force The address information is recorded in advance in the second wobble area 24 according to the CLV format. As a result, the continuity of the information recorded from the start edge of the first emboss pit area 21 to the end of the second wobble area 24 can be ensured, and a DVD player and a DVD recorder employing CLV can be used. Thus, the information recorded on the information recording medium 1 can be reproduced.

Note that, according to the embodiment described above, as shown in FIG. 2, the straight embossed pit row 34 is formed in the straight embossed pit region 23 A in the second embossed pit region 23. That is, the embossed pit is formed in the straight embossed pit area 23A, and no wobble is formed. However, instead of this configuration, a configuration as shown in FIG. 10 can be adopted. That is, as shown in FIG. 10, a wadding group 71 and an embossed pit row 72 are formed in the region 23A, have a phase that is 180 degrees different from the phase of the waveform drawn by the wobbling group 71, and the amplitude thereof. The embossed pits 72A in the embossed pit row 72 may be arranged so as to draw a waveform that is approximately double the amplitude of the wobbling group 71. That is, when the wobbling group 71 is swung to the right side in FIG. 10, the embossed pit row 72 shifts the center of gravity to the left side so as to cancel it. Similarly, when the wobbling group 71 is swung to the left in FIG. 10, the embossed pit row 72 shifts the center of gravity to the right so as to cancel it. In FIG. 10, for convenience of explanation, the wobbling group 71, the embossed pit row 72, and the like are shown being contracted in the circumferential direction of the track of the information recording medium 1. Further, FIG. 11 shows an enlarged cross-sectional shape of the embossed pit 72A as seen from the arrow B-B in FIG. According to such a configuration, it is possible to prevent a DV D recorder or a DVD player from detecting the wobble of the wobbling loop 71 formed in the area 23A. In other words, according to this configuration, although the wobble is actually formed, it is possible to create substantially the same state as when the wobble is not formed. Further, this configuration may be adopted for the straight embossed pit area 21A.

[0129] Further, the present invention can be changed as appropriate without departing from the gist or idea of the invention which can also read the claims and the entire specification, and an information recording medium accompanied with such a change can also be changed. It is included in the technical idea of the invention.

Industrial applicability

The information recording medium according to the present invention can be used as an information recording medium suitable for recording content data such as a movie, a TV program, or music.

Claims

The scope of the claims

[1] a disk-shaped substrate;

A recording layer formed on the substrate;

A lead-in area formed on the recording layer;

A data area located on the outer side of the substrate in the radial direction of the lead-in area and formed on the recording layer;

A first embossed pit region formed in the lead-in region;

A first wobble area formed in the data area;

A second embossed pit region located outside the first wobble region in the radial direction of the substrate and formed in the data region;

A second wobble area located outside the substrate in the radial direction with respect to the second emboss pit area and formed in the data area,

Embossed pits are formed in the first embossed pit area,

A wobble is formed in the first wobble area, and no emboss pit is formed.

Embossed pits are formed in the second embossed pit area, and no wobble is formed.

An information recording medium characterized in that a wobble is formed in the second wobble area and an emboss pit is formed.

[2] The first embossed pit region and the first wobbled region are adjacent to each other, and a first wobbling embossed pit region is formed at the end of the first embossed pit region,

2. The information recording medium according to claim 1, wherein an emboss pit is formed in the first wobbling emboss pit area, and a wobble is formed.

[3] The second embossed pit region and the second wobbled region are adjacent to each other, and a second wobbling embossed pit region is formed at the end of the second wobbled region, 2. The information recording medium according to claim 1, wherein an emboss pit is formed in the second wobbling emboss pit area, and a wobble is formed.

[4] The second embossed pit region and the second wobbled region are adjacent to each other on the recording layer, and the partial region in the second embossed pit region located immediately before the second wobbled region 2. The information recording medium according to claim 1, wherein the information recorded as the embossed pits is predetermined information constituting a leading portion of the ECC block.

[5] The first wobble area and the second embossed pit area are adjacent to each other on the recording layer, and information recorded as an embossed pit at the beginning of the second embossed pit area is: 2. The information recording medium according to claim 1, wherein the information recording medium is information subsequent to predetermined information constituting a head portion of the ECC block.

[6] The information recording medium according to [1], wherein the first wobble area is formed over an end portion of the lead-in area and a head portion of the data area.

[7] The starting end of the second embossed pit region is located on the radially inner side of the substrate from a position approximately 24mm away from the center of the substrate toward the radially outer side of the substrate. The information recording medium according to the first paragraph of the scope.

[8] The end of the second embossed pit region is located on the radially outer side of the substrate from a position approximately 28 mm away from the center of the substrate toward the radially outer side of the substrate. The information recording medium according to the first paragraph of the scope.

[9] Of the second embossed pit region, the end of the region excluding the second wobbling embossed pit region is located approximately 28 mm away from the center of the substrate toward the outside in the radial direction of the substrate. 4. The information recording medium according to claim 3, wherein the information recording medium is located on a radially outer side of the substrate.

[10] The first embossed pit area, the first wobble area, the second embossed pit area, and the second wobble area are continuously formed on the recording layer,

The first embossed pit area, the first wobble area, the second embossed pit area Address information is recorded in advance on each track formed in the second wobble area in accordance with the CLV (Constant Linear Velocity) format from the beginning of the first embossed area to the end of the second wobble area. 2. An information recording medium according to claim 1, characterized in that the information recording medium is characterized in that:

[11] In the first wobbling embossed pit area, a modified embossed pit or a modified embossed pit train for generating a reproduction waveform recognizable as a land prepit is formed. The information recording medium according to item.

[12] The second wobbling embossed pit region is formed with a modified embossed pit or a modified embossed pit train for generating a reproduction waveform recognizable as a land prepit. The information recording medium according to item.

[13] a disk-shaped substrate;