JP2000285607A - Disk-shaped information recording medium, and information recording and reproducing device - Google Patents
Disk-shaped information recording medium, and information recording and reproducing deviceInfo
- Publication number
- JP2000285607A JP2000285607A JP11092036A JP9203699A JP2000285607A JP 2000285607 A JP2000285607 A JP 2000285607A JP 11092036 A JP11092036 A JP 11092036A JP 9203699 A JP9203699 A JP 9203699A JP 2000285607 A JP2000285607 A JP 2000285607A
- Authority
- JP
- Japan
- Prior art keywords
- information recording
- zone
- data
- spare area
- recording medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ディスク状情報記
録媒体を使用し、ユーザデータを記録するユーザ領域に
欠陥が検出された場合に、交替処理を行なう情報記録再
生装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus which uses a disc-shaped information recording medium and performs a replacement process when a defect is detected in a user area for recording user data.
【０００２】[0002]
【従来の技術】書換え型光ディスクであるＤＶＤ−ＲＡ
Ｍは、現在片面２．６ＧＢ、両面５．２ＧＢの記録容量
のものが製品化されている。ＤＶＤ−ＲＡＭでは、媒体
の欠陥や傷、繰り返し記録による劣化が発生したセクタ
を補償するため、欠陥管理を行なっている（日経エレク
トロニクス、１９９７．１０．２０（Ｎｏ．７０１）ｐ
ｐ．１６７−１８６）。欠陥は、ディスクの使用開始前
に発生した初期欠陥と、使用開始後に発生する二次欠陥
の２種類に分けられ、欠陥が生じた領域に対しては予め
設けられたスペア領域で代替する。2. Description of the Related Art DVD-RA which is a rewritable optical disk
M has a recording capacity of 2.6 GB on one side and 5.2 GB on both sides at present. In the DVD-RAM, defect management is performed in order to compensate for a defect or scratch on the medium or a sector in which deterioration due to repetitive recording has occurred (Nikkei Electronics, 1997.10.20 (No. 701) p.
p. 167-186). Defects are classified into two types: an initial defect that occurs before the start of use of the disk and a secondary defect that occurs after the start of use of the disk. The defective area is replaced with a spare area provided in advance.
【０００３】ＤＶＤ−ＲＡＭにおいてユーザデータを記
録するユーザ領域と欠陥セクタに対する交替セクタを提
供するスペア領域は図１に示すような配置を取る。デー
タ領域は２４ゾーンに分割され、各ゾーンのユーザ領域
の外側に同ゾーンに生じた欠陥を補償するスペア領域が
設けられている。In a DVD-RAM, a user area for recording user data and a spare area for providing a replacement sector for a defective sector are arranged as shown in FIG. The data area is divided into 24 zones, and a spare area for compensating for a defect occurring in the zone is provided outside the user area of each zone.
【０００４】欠陥の補償方法としては、初期欠陥と二次
欠陥に対してそれぞれ別々の交替処理方法が用意されて
いる。初期欠陥に対しては、スリップ交替を適用する。
図２にスリップ交替の概念を示す。図２（ａ）は初期欠
陥がない場合、図２（ｂ）は初期欠陥がある場合をそれ
ぞれ示している。スリップ交替はセクタ単位で行なう。
１６セクタで構成される１誤り訂正ブロック中に欠陥セ
クタを発見するとそのセクタをとばして代わりに次のセ
クタを使用する。図２（ｂ）の場合、本来セクタアドレ
ス５，１０，１１である３セクタが欠陥セクタであると
すると、そのセクタにはセクタアドレスを与えずにスキ
ップする。As a method for compensating for defects, separate replacement processing methods are prepared for the initial defect and the secondary defect. For initial defects, slip replacement is applied.
FIG. 2 shows the concept of slip replacement. FIG. 2A shows a case where there is no initial defect, and FIG. 2B shows a case where there is an initial defect. Slip replacement is performed in sector units.
If a defective sector is found in one error correction block composed of 16 sectors, that sector is skipped and the next sector is used instead. In the case of FIG. 2B, if three sectors which are originally sector addresses 5, 10, and 11 are defective sectors, the sector is skipped without giving a sector address.
【０００５】このようなスリップ交替は、一つのゾーン
内で行なわれる。図３にスリップ交替におけるスペア領
域の使用方法を表す。図３（ａ）は欠陥セクタがない場
合、図３（ｂ）は欠陥セクタがある場合をそれぞれ示し
ている。図ではユーザ領域の２箇所にそれぞれｍセク
タ、ｎセクタの欠陥がある場合を示している。この場合
スリップ交替によって欠陥セクタ分だけユーザ領域がず
れ込み、そのゾーンのユーザ領域の末尾において、スペ
ア領域の（ｍ＋ｎ）セクタ分がユーザ領域に割り当てら
れる。このため、この分だけ後に述べる二次欠陥に使用
できるスペア領域は小さくなる。[0005] Such a slip change is performed in one zone. FIG. 3 shows a method of using the spare area in the slip replacement. FIG. 3A shows a case where there is no defective sector, and FIG. 3B shows a case where there is a defective sector. The figure shows a case where there are m sectors and n sectors of defects at two locations in the user area, respectively. In this case, the user area is shifted by the number of defective sectors due to the slip replacement, and (m + n) sectors of the spare area are allocated to the user area at the end of the user area in that zone. For this reason, the spare area that can be used for a secondary defect described later becomes smaller by that much.
【０００６】一方、二次欠陥に対しては、リニア交替を
適用する。図４にリニア交替の概念を示す。リニア交替
は誤り訂正ブロック単位で行なう。１誤り訂正ブロック
（１６セクタ）内に規定数以上の誤りのある行を発見す
ると、そのブロックは欠陥と判定し、使用せず、その代
わりにスペア領域にあるブロックを使用する。On the other hand, linear replacement is applied to secondary defects. FIG. 4 shows the concept of linear replacement. Linear replacement is performed in error correction block units. When a row having an error equal to or more than a prescribed number is found in one error correction block (16 sectors), the block is determined to be defective and is not used. Instead, a block in the spare area is used.
【０００７】リニア交替は、まず同一ゾーン内で行なわ
れる。図５にリニア交替におけるスペア領域の使用方法
を示す。例えば、ユーザ領域の２箇所でそれぞれｍ個の
ブロックとｎ個のブロックが二次欠陥を起こしていた場
合、リニア交替を行なう。スペア領域の先頭から（ｍ＋
ｎ）ブロックを、二次欠陥を起こしていたブロックの代
わりに使用する。代替したブロック内のセクタには、元
のセクタと同じ論理アドレスを付与する。同一ゾーンの
スペア領域を使い切ったときは他のゾーンのスペア領域
を使っても良いことになっている。[0007] Linear replacement is first performed in the same zone. FIG. 5 shows a method of using the spare area in the linear replacement. For example, if m blocks and n blocks have secondary defects at two locations in the user area, linear replacement is performed. (M +
n) Use the block instead of the block that had the secondary defect. The same logical address as that of the original sector is assigned to the sector in the replaced block. When the spare area of the same zone is used up, the spare area of another zone may be used.
【０００８】[0008]
【発明が解決しようとする課題】前述したように、ＤＶ
Ｄ−ＲＡＭではデータ領域が２４ゾーンに同心円状に分
割され、それぞれにユーザ領域とスペア領域を持つ。あ
るユーザ領域の初期欠陥、二次欠陥に対しては、まず同
一ゾーンのスペア領域を使用する。同一ゾーンのスペア
領域を使い切った場合には、他のゾーンの空いているス
ペア領域を使うことになる。As described above, the DV
In the D-RAM, the data area is concentrically divided into 24 zones, each of which has a user area and a spare area. For an initial defect and a secondary defect in a certain user area, first, a spare area in the same zone is used. When the spare area in the same zone is used up, an empty spare area in another zone is used.
【０００９】ＤＶＤ−ＲＡＭではＺｏｎｅｄ Ｃｏｎｓ
ｔａｎｔ Ｌｉｎｅａｒ Ｖｅｌｏｃｉｔｙ（以下ＺＣ
ＬＶ）方式の記録フォーマットを採用している。この記
録フォーマットでは、各ゾーン内でディスクの回転数は
一定であるが、ゾーン間では回転数を異ならせている。
この場合、内周のゾーンでは外周のゾーンに比べてディ
スクを高速で回転させ、ディスク全面に渡って線速度が
ほぼ一定となるようにしている。このため、ピックアッ
プが、あるゾーンから別のゾーンに移動する場合、ピッ
クアップの移動（シーク）と同時にディスク回転数の変
更も行なう必要がある。そのため、回転サーボが目標の
回転数に落ち着くまでの待ち時間が生ずるためアクセス
が遅くなる。In DVD-RAM, Zoned Cons
tang Linear Velocity (hereinafter ZC)
(LV) recording format. In this recording format, the number of revolutions of the disk is constant in each zone, but the number of revolutions differs between zones.
In this case, the disk is rotated at a higher speed in the inner zone than in the outer zone, so that the linear velocity is substantially constant over the entire surface of the disk. Therefore, when the pickup moves from one zone to another zone, it is necessary to change the number of rotations of the disk at the same time as the movement (seek) of the pickup. For this reason, there is a waiting time until the rotation servo settles at the target number of revolutions, so that access is delayed.
【００１０】したがって、あるゾーンのユーザ領域で多
く欠陥が発生し、他のゾーンのスペア領域をも使用する
ような状況になった場合、本来一ゾーン内で収まるデー
タの記録再生中にも、往復２回以上のシークおよび回転
数変更を伴うことになる。このためデータの平均転送速
度が極端に低下することになってしまう。Therefore, when many defects occur in the user area of a certain zone and the spare area of another zone is used, a round-trip operation is performed even during recording / reproducing of data which normally fits in one zone. This involves two or more seeks and rotation speed changes. For this reason, the average transfer speed of data is extremely reduced.
【００１１】そこで、本発明では、特に、複数の情報記
録層を持つＤＶＤ−ＲＡＭにおいて、欠陥管理方法にお
けるスペア領域の使用方法を規定し、ゾーン間のシーク
やディスク回転数変更によるオーバヘッド時間を低減さ
せて転送速度の低下を防ぎ、ユーザの使い勝手のよいデ
ィスク状情報記録媒体および情報記録再生装置を提供す
ることを目的とする。Therefore, in the present invention, in particular, in a DVD-RAM having a plurality of information recording layers, a method of using a spare area in a defect management method is specified, and seek time between zones and reduction of an overhead time due to a change in a disk rotation speed are reduced. It is therefore an object of the present invention to provide a disc-shaped information recording medium and an information recording / reproducing apparatus which can prevent a decrease in transfer speed and are easy for a user to use.
【００１２】[0012]
【課題を解決するための手段】上記目的を達成するた
め、本発明では、データを記録するデータ領域が、ディ
スク半径方向に関して分割された複数のゾーンで構成さ
れ、各ゾーンにおける線速度が一定となるように回転が
制御されるディスク状情報記録媒体において、少なくと
も２層の情報記録層を備え、そのうち少なくとも２層の
情報記録層は互いに同一のゾーン構成を有することを特
徴とするディスク状情報記録媒体を提供する。In order to achieve the above object, according to the present invention, a data area for recording data is composed of a plurality of zones divided in a disk radial direction, and a linear velocity in each zone is constant. A disk-shaped information recording medium whose rotation is controlled to have at least two information recording layers, wherein at least two of the information recording layers have the same zone configuration as each other. Provide media.
【００１３】ここで、前記データ領域に欠陥セクタが検
出されたときに、該欠陥セクタに記録されるべきデータ
を代わりに記録するためのスペア領域を更に具備するも
のであってもよい。Here, when a defective sector is detected in the data area, the data area may further include a spare area for recording data to be recorded in the defective sector instead.
【００１４】また、前記スペア領域は、前記各ゾーンご
とに設けられるようにしてもよい。また、本発明では、
ディスク状情報記録媒体のデータ領域に欠陥セクタが検
出された場合に、該ディスク状情報記録媒体にあらかじ
め設定されたスペア領域の交替セクタに、該欠陥セクタ
に記録されるべきデータを代わりに記録する情報記録再
生装置において、前記ディスク状情報記録媒体は少なく
とも２層の情報記録層を有し、そのうちの一層のデータ
領域において発生した欠陥セクタに記録されるべきデー
タを、他の情報記録層のスペア領域の交替セクタに代わ
りに記録することを特徴とする情報記録再生装置を提供
する。Further, the spare area may be provided for each of the zones. In the present invention,
When a defective sector is detected in the data area of the disk-shaped information recording medium, data to be recorded in the defective sector is recorded instead in a spare sector of a spare area set in advance in the disk-shaped information recording medium. In the information recording / reproducing apparatus, the disc-shaped information recording medium has at least two information recording layers, and data to be recorded in a defective sector generated in a data area of one of the information recording layers is used as a spare for another information recording layer. There is provided an information recording / reproducing apparatus characterized in that recording is performed instead of an alternate sector in an area.
【００１５】ここで、前記ディスク状情報記録媒体の前
記データ領域は、ディスク半径方向に関して分割された
複数のゾーンで構成され、各ゾーンにおける線速度が一
定となるように前記ディスク状情報記録媒体の回転が制
御されるようにしてもよい。Here, the data area of the disc-shaped information recording medium is composed of a plurality of zones divided in the radial direction of the disc, and the data area of the disc-shaped information recording medium is kept constant in each zone. The rotation may be controlled.
【００１６】また、前記スペア領域が前記複数のゾーン
ごとに設けられており、前記情報記録層のうち少なくと
も二層は同一のゾーン構成を有し、そのうちの一の情報
記録層において前記欠陥セクタが存在する前記ゾーンに
設けられた前記スペア領域に使用可能なセクタがない場
合に、同一のゾーン構成を有する他の情報記録層におけ
る同一のゾーンに設けられた前記スペア領域に、前記欠
陥セクタに記録されるべきデータを代わりに記録するよ
うにしてもよい。さらに、前記ディスク状情報記録媒体
がＺＣＬＶ方式の記録フォーマットを採用するものであ
ってもよい。Further, the spare area is provided for each of the plurality of zones, and at least two of the information recording layers have the same zone configuration. If there is no usable sector in the spare area provided in the existing zone, the defective sector is recorded in the spare area provided in the same zone in another information recording layer having the same zone configuration. The data to be performed may be recorded instead. Further, the disc-shaped information recording medium may adopt a recording format of the ZCLV system.
【００１７】[0017]
【発明の実施の形態】以下、本発明の実施形態について
図面を参照しつつ詳細に説明する。最近ＤＶＤ−ＲＡＭ
を大容量化する手段として、ビット長を低減したり、ト
ラックピッチを縮小することにより、記録面密度を上げ
る方法に加え、記録層を２層化してディスク１枚あたり
の記録容量を増加させる方法が考えられている。Embodiments of the present invention will be described below in detail with reference to the drawings. Recent DVD-RAM
In order to increase the recording capacity, in addition to the method of increasing the recording surface density by reducing the bit length or the track pitch, the method of increasing the recording capacity per disk by forming two recording layers. Is considered.
【００１８】ＤＶＤ−ＲＡＭを２層化する場合、互換性
の観点から物理フォーマット、論理フォーマットはＤＶ
Ｄ−ＲＡＭのフォーマットを踏襲することが好ましいと
考えられる。この場合、欠陥管理についても同様な管理
方法を採ることが互換ドライブ製造のコストパフォーマ
ンスを考えても有効と言える。When a DVD-RAM has two layers, the physical format and the logical format are DV from the viewpoint of compatibility.
It is considered preferable to follow the format of the D-RAM. In this case, it can be said that adopting a similar management method for defect management is also effective considering the cost performance of manufacturing compatible drives.
【００１９】したがって、２層ＤＶＤ−ＲＡＭでは各々
の情報記録層が１層のＤＶＤ−ＲＡＭと同様のフォーマ
ットを持ち、各々の情報記録層に欠陥管理用のスペア領
域を持つ構成とすることが互換性に優れた２層ＤＶＤ−
ＲＡＭと言える。Therefore, in a two-layer DVD-RAM, it is compatible that each information recording layer has the same format as a one-layer DVD-RAM, and each information recording layer has a spare area for defect management. Double-layer DVD with excellent performance
It can be called RAM.
【００２０】さらに、このような２層ＤＶＤ−ＲＡＭに
おいて上記のようにあるゾーンのユーザ領域で多く欠陥
が発生し、そのゾーンのスペア領域を使い切って他のゾ
ーンのスペア領域をも使用しなくてはならない状況にな
った場合、同一情報記録層における別ゾーンのスペア領
域を使用しようとすると、前述のようにアクセス時間を
多く要することになってしまう。Further, in such a two-layer DVD-RAM, many defects occur in the user area of a certain zone as described above, and the spare area of the zone is used up and the spare area of another zone is not used. In such a situation, if an attempt is made to use a spare area of another zone in the same information recording layer, a long access time is required as described above.
【００２１】本発明では、図６に示すように、あるゾー
ン（ｌａｙｅｒ１のｚｏｎｅＮ）でスペア領域に空きセ
クタがなかった場合、同一情報記録層における別ゾーン
（例えばｌａｙｅｒ１のｚｏｎｅＮ−１）のスペア領域
ではなく、他の情報記録層における同一ゾーンのスペア
領域（ｌａｙｅｒ２のｚｏｎｅＮ）を使用する。こうす
ることで回転数変更を伴わずに済み、アクセス時間は向
上する。したがって同一情報記録層における別ゾーンの
スペア領域を使う場合に比べて平均転送速度の低下を抑
えることができる。In the present invention, as shown in FIG. 6, when there is no empty sector in a spare area in a certain zone (zoneN of layer 1), a spare area of another zone (for example, zoneN-1 of layer1) in the same information recording layer is used. Instead, a spare area (zoneN of layer2) of the same zone in another information recording layer is used. By doing so, the rotation speed does not need to be changed, and the access time is improved. Therefore, a decrease in the average transfer speed can be suppressed as compared with a case where a spare area of another zone in the same information recording layer is used.
【００２２】次に、本発明に係る情報記録媒体の詳細に
ついて図７，８を参照しつつ説明する。図７は本発明の
情報記録媒体の一例として用いられる書換え型２層光デ
ィスクの断面を摸式的に表したものである。この光ディ
スクは０．６ｍｍ厚のポリカーボネート（ＰＣ）基板
１，２を２枚貼り合わせた１．２ｍｍの厚さ寸法を持つ
ものである。ＰＣ基板１の上部、およびＰＣ基板２の下
部にはそれぞれ情報記録層１，２が形成されており、両
者の中間には、レーザ光に対して透明な中間層（厚さは
例えば４０μｍ程度）が形成され、この中間層をもって
両基板は貼り合わされている。情報記録層１，２にはレ
ーザ光を情報記録トラックに追従させるための案内溝
（グルーブ）が形成されている。データは案内溝内およ
び案内溝と案内溝の間（ランド）に記録される。Next, details of the information recording medium according to the present invention will be described with reference to FIGS. FIG. 7 schematically shows a cross section of a rewritable double-layer optical disc used as an example of the information recording medium of the present invention. This optical disk has a thickness of 1.2 mm in which two 0.6 mm thick polycarbonate (PC) substrates 1 and 2 are bonded together. Information recording layers 1 and 2 are formed on the upper part of the PC substrate 1 and the lower part of the PC substrate 2, respectively. An intermediate layer (thickness is, for example, about 40 μm) transparent to the laser beam is provided between the two. Are formed, and both substrates are bonded together with this intermediate layer. The information recording layers 1 and 2 are formed with guide grooves (grooves) for causing the laser light to follow the information recording tracks. Data is recorded in the guide groove and between the guide grooves (land).
【００２３】図８は、図７の点線で囲った領域の詳細図
である。情報記録層１および情報記録層２はそれぞれ書
換え可能な記録材料層を含む、例えば相変化記録媒体多
層膜体である。情報記録層１は、Ｇｅ，Ｓｂ，Ｔｅの化
合物による相変化記録材料膜をＺｎＳ−ＳｉＯ2 からな
る２つの保護層で挟んだものである。実際にはＧｅＳｂ
Ｔｅ層がレーザ光による熱で相変化を生じ、非晶質状態
のマークを形成し情報を記録する。再生では、相変化を
起こさない程度の光量のレーザ光を照射して、非晶質状
態のマーク部と結晶状態のスペース部の反射率差による
反射光の強弱を検知して情報を読みとる。FIG. 8 is a detailed view of a region surrounded by a dotted line in FIG. The information recording layer 1 and the information recording layer 2 are, for example, phase change recording medium multilayer films each including a rewritable recording material layer. Information recording layer 1, Ge, Sb, those sandwiched between two protective layers formed of a phase change recording material layer from the ZnS-SiO 2 with a compound of Te. Actually GeSb
The Te layer undergoes a phase change due to heat generated by the laser beam, and forms an amorphous mark to record information. In the reproduction, information is read by irradiating a laser beam with an amount of light that does not cause a phase change and detecting the intensity of reflected light due to a difference in reflectance between a mark portion in an amorphous state and a space portion in a crystalline state.
【００２４】情報記録層２は情報記録層１と同様なＧｅ
ＳｂＴｅ層をＺｎＳ−ＳｉＯ2 層で挟んだ構造を持ち、
さらにその上部には反射層としてＡｌ合金からなる薄膜
が形成されている。また、その下部にはＡｕの半透明層
が設けられており、相変化多層膜全体としての光学特性
のバランスを調整している。The information recording layer 2 has the same Ge as the information recording layer 1.
It has a structure in which an SbTe layer is sandwiched between ZnS-SiO 2 layers,
Further, a thin film made of an Al alloy is formed thereon as a reflective layer. Further, a translucent layer of Au is provided underneath to adjust the balance of the optical characteristics of the entire phase-change multilayer film.
【００２５】本発明の情報記録媒体の一例である書換え
型２層光ディスクの平面図は図１に示したものと同様で
ある。ディスクの最内周と最外周にはコントロールデー
タ領域や欠陥管理情報領域を有するリードイン領域とリ
ードアウト領域が設けられている。ユーザデータを記録
するデータ領域はリードイン領域とリードアウト領域の
間に複数のゾーンに区切られる、いわゆるＺＣＬＶ方式
のフォーマットである。図１では、データ領域はゾーン
０からゾーン２３の計２４ゾーンに分割され、各ゾーン
はユーザ領域と交替処理に用いるスペア領域にさらに分
割される。ユーザ領域とスペア領域の容量比は例えば１
００：５である。A plan view of a rewritable double-layer optical disc which is an example of the information recording medium of the present invention is the same as that shown in FIG. A lead-in area and a lead-out area having a control data area and a defect management information area are provided on the innermost and outermost circumferences of the disc. The data area for recording user data is a so-called ZCLV format which is divided into a plurality of zones between the lead-in area and the lead-out area. In FIG. 1, the data area is divided into a total of 24 zones from zone 0 to zone 23, and each zone is further divided into a user area and a spare area used for replacement processing. The capacity ratio between the user area and the spare area is, for example, 1
00: 5.
【００２６】図９は、ＺＣＬＶ方式におけるゾーン分割
の物理的配置の例であり、ＤＶＤ−ＲＡＭの場合を表し
ている。最内周のゾーン０から最外周のゾーン２３まで
各ゾーン毎にディスクの回転数が段階的に低減される。
これは、各ゾーンにおける線速度をほぼ一定とするため
で、内周ほど高く、外周ほど低い回転数となる。FIG. 9 shows an example of a physical arrangement of zone division in the ZCLV system, and shows the case of a DVD-RAM. From the innermost zone 0 to the outermost zone 23, the rotational speed of the disk is reduced step by step for each zone.
This is because the linear velocity in each zone is made substantially constant. The rotation speed becomes higher toward the inner circumference and becomes lower toward the outer circumference.
【００２７】本発明の情報記録媒体においては、図７に
示す２つの情報記録層がともに図１に示す平面構造を持
ち、互いに上下に貼り合わされているものである。した
がって、各々の情報記録層は貼り合わせ時に生ずる偏心
により多少のずれは生ずるが、各ゾーンのほとんどの領
域は２層において直上・直下の状態にオーバラップする
と考えて良い。したがって、このような構造とすること
により一方の情報記録層のあるゾーンから、直上あるい
は直下の情報記録層へ層間移動（フォーカスジャンプ）
する場合は、ディスクの回転数は同一でよいことにな
る。In the information recording medium of the present invention, the two information recording layers shown in FIG. 7 both have the planar structure shown in FIG. 1 and are vertically bonded to each other. Therefore, although each information recording layer slightly shifts due to the eccentricity generated at the time of bonding, it can be considered that almost the area of each zone overlaps the two layers directly above and below. Therefore, by adopting such a structure, interlayer movement (focus jump) from one zone of one information recording layer to the information recording layer immediately above or immediately below it.
In this case, the number of rotations of the disk may be the same.
【００２８】図１０は、図１および図７であらわされる
ような複数の情報記録層をもつ光ディスクにおいて、欠
陥セクタが検出された場合の交替処理の流れを説明する
フローチャートである。この図では、光ディスクが後述
する情報記録再生装置に装填され、ユーザがデータをあ
るゾーンに書き込む指令行なった場合を想定している。FIG. 10 is a flowchart for explaining the flow of a replacement process when a defective sector is detected in an optical disc having a plurality of information recording layers as shown in FIGS. In this figure, it is assumed that the optical disc is loaded in an information recording / reproducing apparatus described later, and a user issues a command to write data to a certain zone.
【００２９】まず、書き込むべきデータが情報記録再生
装置に取り込まれる（Ｓ１）。取り込まれたデータは、
情報記録再生装置の制御系によって指定される所定のブ
ロック（例えばゾーンＮ内のあるブロック）に書き込ま
れる（Ｓ２）。書き込まれたデータは直後に一度再生さ
れ正しいデータとなっているか照合される（ベリファ
イ: Ｓ３）。ベリファイの結果、欠陥と見なされるブロ
ックが存在するどうか判断される（Ｓ４）。欠陥ブロッ
クがなかった場合は、正常に書き込みが行なわれてとし
て、続くデータがあるかどうかの判別に移り（Ｓ８）、
続きがある場合はデータの読み込みへ移行し（Ｓ１）、
すべてのデータ書き込みが終了した場合は終了する。First, data to be written is taken into the information recording / reproducing device (S1). The captured data is
The data is written in a predetermined block (for example, a certain block in the zone N) specified by the control system of the information recording / reproducing device (S2). Immediately after that, the written data is reproduced once and collated as to whether the data is correct (verify: S3). As a result of the verification, it is determined whether or not there is a block regarded as a defect (S4). If there is no defective block, it is determined that writing has been normally performed, and the process proceeds to determination as to whether or not there is subsequent data (S8).
If there is a continuation, the process proceeds to data reading (S1),
When all data writing is completed, the process ends.
【００３０】さて、Ｓ４において欠陥ブロックが存在す
る場合は、まず、Ｓ２で指定された所定ブロックの含ま
れるゾーン（ゾーンＮ）に割り当てられたスペア領域に
欠陥ブロックの代わりにデータを書き込むだけの空きが
あるか否かを判断される（Ｓ５）。同一ゾーンのスペア
領域に空きがある場合は、そのスペア領域に対して交替
記録を行ない（Ｓ６）、続くデータの存在の判別（Ｓ
８）へと移行する。If there is a defective block in S4, first, an empty space for writing data instead of the defective block in the spare area allocated to the zone (zone N) including the predetermined block specified in S2. It is determined whether or not there is (S5). If there is a vacancy in the spare area of the same zone, replacement recording is performed on the spare area (S6), and it is determined whether or not subsequent data exists (S6).
Go to 8).
【００３１】一方、同一ゾーンのスペア領域に空きがな
い場合、他の情報記録層、具体的には直上あるいは直下
の情報記録層における同一ゾーン（ゾーンＮ）のスペア
領域に交替記録を行なう（Ｓ７）。On the other hand, if there is no free space in the spare area of the same zone, replacement recording is performed in the spare area of the same zone (zone N) in another information recording layer, specifically, the information recording layer immediately above or immediately below (S7). ).
【００３２】このようなシーケンスとすることで、同一
ゾーンのスペア領域に空きがない場合に、同一情報記録
層の別ゾーンに交替記録する場合に比べて、回転数変更
の必要がないため回転数安定までの待ち時間が生じない
分アクセス時間の短縮ができ、引いてはデータ記録時の
平均転送レートが向上することになる。もちろん、この
欠陥ブロックを挟んだデータの再生時においても欠陥ブ
ロックにおいて別ゾーンへ移動する必要がないため、平
均転送レートが向上することになる。With this sequence, when there is no free space in the spare area of the same zone, there is no need to change the number of revolutions as compared with the case where replacement recording is performed in another zone of the same information recording layer. The access time can be shortened because the waiting time until stabilization does not occur, and the average transfer rate at the time of data recording can be improved. Of course, it is not necessary to move to another zone in the defective block even when reproducing data sandwiching the defective block, so that the average transfer rate is improved.
【００３３】図１１に本発明の実施形態における情報記
録再生装置のブロック図を示す。光ディスク１は、記録
再生ゾーン（半径位置）によって回転数を変更させるよ
うな記録フォーマット（例えばＺＣＬＶ方式）に従った
書換え型光ディスク、例えばＤＶＤ−ＲＡＭである。ユ
ーザデータを記録するデータ領域は、図１に示すように
複数のゾーン（例えば２４ゾーン）に分割され、各ゾー
ンに交替処理用のスペア領域が設けられている。FIG. 11 is a block diagram of an information recording / reproducing apparatus according to the embodiment of the present invention. The optical disc 1 is a rewritable optical disc, for example, a DVD-RAM, that conforms to a recording format (for example, the ZCLV method) in which the number of revolutions is changed according to a recording / reproducing zone (radial position). The data area for recording user data is divided into a plurality of zones (for example, 24 zones) as shown in FIG. 1, and each zone is provided with a spare area for replacement processing.
【００３４】光ディスク１はスピンドルモータ２に固定
され、光ピックアップ３によって情報の記録再生が行わ
れる該光ディスク１上のゾーンに応じた回転数で回転駆
動される。The optical disk 1 is fixed to a spindle motor 2 and is driven to rotate at a rotational speed corresponding to a zone on the optical disk 1 on which information is recorded and reproduced by an optical pickup 3.
【００３５】光ディスク１へのデータの記録・再生は、
光ピックアップ３から照射されるレーザ光によってなさ
れる。光ディスク１上には、ユーザデータを記録すべき
トラックを形成する凹凸、すなわちランド・グルーブが
スパイラル状に形成されている。例えば、ＤＶＤ−ＲＡ
Ｍでは、このランドとグルーブによって形成されたトラ
ックのピッチは０．７４μｍである。データはセクタ単
位で記録され、光ディスク１上では１セクタ毎にアドレ
ス情報等が予めピットとして記録されている。Recording and reproduction of data on the optical disk 1 are as follows.
This is performed by laser light emitted from the optical pickup 3. On the optical disk 1, irregularities forming tracks for recording user data, that is, land / grooves are formed in a spiral shape. For example, DVD-RA
In M, the pitch of the track formed by the land and the groove is 0.74 μm. Data is recorded in sector units, and address information and the like are recorded in advance on the optical disc 1 as pits for each sector.
【００３６】また、光ディスク１は、このようなランド
／グルーブおよびピットからなる情報記録層が図７に示
すように２層となっていることが特徴である。基本的な
記録フォーマットは、１層目と２層目で同一となってい
ることが望ましく、本実施形態ではゾーン構成、セクタ
構成は両者で同一のものであるとする。ただし、両層に
おいてゾーン構成が極端に変わらない限り、異なるゾー
ン構成の場合においても本発明は有効である。例えば、
ある情報記録層における同一ゾーンのスペア領域に空き
がない場合、他の情報記録層、具体的には直上あるいは
直下の情報記録層に位置するゾーンのスペア領域に交替
記録を行なうようにすれば良い。The optical disc 1 is characterized in that the information recording layer composed of such lands / grooves and pits has two layers as shown in FIG. The basic recording format is desirably the same for the first layer and the second layer. In this embodiment, it is assumed that the zone configuration and the sector configuration are the same for both. However, the present invention is effective even in the case of different zone configurations as long as the zone configuration in both layers is not extremely changed. For example,
If there is no free space in the spare area of the same zone in a certain information recording layer, replacement recording may be performed in another information recording layer, specifically, a spare area of a zone located immediately above or immediately below the information recording layer. .
【００３７】光ピックアップ３から光ディスク１上の情
報記録層へ照射されるレーザ光のビームスポットは、光
ピックアップ３内の図示しないアクチュエータによって
ディスクの情報記録面に対して垂直方向（フォーカス方
向）とディスク半径方向（トラック方向）に微小な位置
制御が可能となっている。目標の情報記録面およびトラ
ックからのビームスポットの位置ずれ量は、光ピックア
ップ３内の光学系により、例えばフォーカス方向の位置
ずれは周知の非点収差法、トラック方向の位置ずれは周
知のプッシュプル法によって検出される。検出された位
置ずれ情報を含む信号は電気信号として光ピックアップ
３より出力されプリアンプ４において所定の演算をなさ
れたのちサーボ回路５へ送られる。サーボ回路５からは
位置ずれ量に応じた適正なアクチュエータドライブ信号
が光ピックアップ３のアクチュエータへ送られアクチュ
エータを適正な位置へ駆動する。こうして、サーボルー
プが形成され、ビームスポットが目標位置へ安定に制御
される。The beam spot of the laser beam emitted from the optical pickup 3 to the information recording layer on the optical disk 1 is moved vertically (focus direction) with respect to the information recording surface of the disk by an actuator (not shown) in the optical pickup 3. Fine position control is possible in the radial direction (track direction). The amount of displacement of the beam spot from the target information recording surface and the track is determined by an optical system in the optical pickup 3, for example, the displacement in the focus direction is a known astigmatism method, and the displacement in the track direction is a known push-pull method. Detected by the method. The signal including the detected positional deviation information is output from the optical pickup 3 as an electric signal, and is sent to the servo circuit 5 after performing a predetermined operation in the preamplifier 4. An appropriate actuator drive signal according to the amount of displacement is sent from the servo circuit 5 to the actuator of the optical pickup 3 to drive the actuator to an appropriate position. Thus, a servo loop is formed, and the beam spot is stably controlled to the target position.
【００３８】なお、光ビームスポットの情報記録層間の
移動（フォーカスジャンプ）もこのアクチュエータによ
って位置制御可能な移動である。また、ディスク半径方
向への大幅な移動（例えば１ｍｍ以上の移動）に対して
はリニアモータ６によって光ピックアップ３全体が移動
させられて追従する。The movement (focus jump) of the light beam spot between the information recording layers is also a movement whose position can be controlled by this actuator. In addition, for a large movement (for example, a movement of 1 mm or more) in the disk radial direction, the entire optical pickup 3 is moved and followed by the linear motor 6.
【００３９】前述のスピンドルモータ２の回転制御を含
む光ディスク１上の所望位置へのサーボ制御は、ドライ
ブ制御回路７からの指示を受け、サーボ回路５によって
実際に処理される。The servo control to the desired position on the optical disk 1 including the rotation control of the spindle motor 2 is actually processed by the servo circuit 5 upon receiving an instruction from the drive control circuit 7.
【００４０】光ディスク１からの情報の再生処理は以下
のように行なわれる。光ディスク１が装填されると図１
のリードイン領域とリードアウト領域がまず再生され、
その中に含まれる光ディスク１の欠陥リストが読み出さ
れる。欠陥リストは欠陥リストメモリ８に格納される。
外部（例えばパソコン）から光ディスク１上の所定の論
理アドレスに対するアクセス要求がインターフェース９
より送られて来ると、システム制御部１０にて論理アド
レスが物理アドレスに変換される。この際、光ディスク
１のフォーマットにおける物理アドレス配置を表すゾー
ン構成表１１と欠陥リストメモリ８を参照して、光ディ
スク１上の交替記録状態が正確に反映される。こうし
て、アクセス要求のあったデータの論理アドレスに対す
る物理アドレスが判明し、システム制御部１０からドラ
イブ制御回路７へ順次送られる。ドライブ制御回路７で
はその物理アドレスへ再生ビームスポットを移動させる
べくサーボ回路５へ指示を送る。サーボ回路５は、アク
チュエータ、リニアモータ６を必要に応じて駆動し指示
のあった物理アドレスへビームスポットを移動させる。
このとき所望の物理アドレスが存在するゾーンにおける
所定の回転数が直前の回転数と異なる場合、サーボ回路
５はスピンドルモータの回転数も併せて変更させる。The process of reproducing information from the optical disk 1 is performed as follows. When the optical disk 1 is loaded, FIG.
The lead-in and lead-out areas of the
The defect list of the optical disk 1 included therein is read. The defect list is stored in the defect list memory 8.
An access request from the outside (for example, a personal computer) to a predetermined logical address on the optical disc 1
Then, the logical address is converted into a physical address by the system control unit 10. At this time, the alternate recording state on the optical disk 1 is accurately reflected by referring to the zone configuration table 11 indicating the physical address arrangement in the format of the optical disk 1 and the defect list memory 8. In this way, the physical address corresponding to the logical address of the data requested to be accessed is determined, and is sequentially transmitted from the system control unit 10 to the drive control circuit 7. The drive control circuit 7 sends an instruction to the servo circuit 5 to move the reproduction beam spot to the physical address. The servo circuit 5 drives the actuator and the linear motor 6 as needed to move the beam spot to the physical address specified.
At this time, if the predetermined rotation speed in the zone where the desired physical address exists is different from the previous rotation speed, the servo circuit 5 also changes the rotation speed of the spindle motor.
【００４１】こうして、所望の物理アドレスに記録され
た例えば相変化マーク列をビームスポットが走査し、光
ディスク１からの反射光の光量の強弱を検出する。反射
光の検出においては光ピックアップ３内の光検出器によ
って光パワーが電流に変換され、その信号がプリアンプ
４によって電気信号として増幅される。プリアンプ４か
らの信号に対して、信号処理回路１２ではデータ記録時
に施されたデータ変調方式に基づいた復調処理を行な
い、変調前のオリジナルデータを復元し、バッファメモ
リ１３へと書き込む。書き込まれたデータが再生データ
としてバッファメモリ１３から順次インターフェース９
を介して外部へと出力される。以上が一連の再生処理で
ある。In this manner, the beam spot scans, for example, a phase change mark string recorded at a desired physical address, and detects the intensity of the amount of reflected light from the optical disk 1. In detecting the reflected light, the optical power is converted into a current by the photodetector in the optical pickup 3, and the signal is amplified by the preamplifier 4 as an electric signal. The signal from the preamplifier 4 is demodulated by the signal processing circuit 12 based on the data modulation method applied at the time of data recording, and the original data before modulation is restored and written into the buffer memory 13. The written data is sequentially transmitted from the buffer memory 13 to the interface 9 as reproduction data.
Is output to the outside through. The above is a series of reproduction processing.
【００４２】次に、光ディスク１上に欠陥ブロック（二
次欠陥）が発見された場合の、実際のデータ書き込み動
作を説明する。外部からデータの書き込み指令があった
場合、インターフェース９を介してデータが所定の単位
で取り込まれ、一旦バッファメモリ１３へと書き込まれ
る。取り込まれたデータはシステム制御部１０によって
光ディスク１上の空き領域の物理アドレスへ書き込み指
示が出される。Next, an actual data writing operation when a defective block (secondary defect) is found on the optical disk 1 will be described. When a data write command is issued from outside, the data is fetched in a predetermined unit via the interface 9 and is once written into the buffer memory 13. The system controller 10 issues a write instruction to the physical address of the empty area on the optical disk 1 for the fetched data.
【００４３】ドライブ制御回路７は、指定された物理ア
ドレスへビームスポットを移動させるべく再生処理で述
べた方法と同様にサーボ回路５へ指示を出し、ビームス
ポットを所望の物理アドレスへと移動させる。所望の物
理アドレスへの移動が完了すると、バッファメモリに蓄
えられていたデータは一定の単位（例えば１６セクタ＝
３２ＫＢ単位）で信号処理回路１２へ取り込まれ、信号
処理回路１２にて所定の変調方式によりデータ変調を施
され、光ディスク１上へ記録する記録データ列へと変換
される。レーザドライバ１４は信号処理回路１２からの
記録データ列に応じて、光ピックアップ３内のレーザを
強度変調し、所望の物理アドレスへのマーク列（例えば
相変化マーク列）の記録を行なう。The drive control circuit 7 issues an instruction to the servo circuit 5 to move the beam spot to the specified physical address in the same manner as the method described in the reproduction processing, and moves the beam spot to a desired physical address. When the movement to the desired physical address is completed, the data stored in the buffer memory becomes a fixed unit (for example, 16 sectors =
The data is taken into the signal processing circuit 12 in units of 32 KB, subjected to data modulation by a predetermined modulation method in the signal processing circuit 12, and converted into a recording data sequence to be recorded on the optical disc 1. The laser driver 14 modulates the intensity of the laser in the optical pickup 3 according to the recording data sequence from the signal processing circuit 12, and records a mark sequence (for example, a phase change mark sequence) at a desired physical address.
【００４４】記録されたデータはその直後に読み出さ
れ、記録要求があったデータと照合される（ベリファ
イ）。ベリファイによってデータブロック（例えば１６
セクタ）中に所定の数以上のエラーが発見されたデータ
ブロックは欠陥ブロックと見なされ、交替処理が実行さ
れる。このとき欠陥リストメモリ８に書き込まれた欠陥
リストとゾーン構成表１１から、欠陥ブロックの存在す
るゾーンに設けられたスペア領域に空きブロックが存在
するかシステム制御部１０により判断される。空きブロ
ックがある場合には、その物理アドレスへのアクセス指
示がドライブ制御回路７へ送られる。サーボ回路５はビ
ームスポットの移動処理を実行するが、この場合は同一
ゾーンへのアクセス指令のため、スピンドルモータ２の
回転数変更は必要ない。The recorded data is read immediately after that, and is compared with the data requested to be recorded (verify). The data block (for example, 16
A data block in which a predetermined number or more errors are found in a sector) is regarded as a defective block, and a replacement process is performed. At this time, from the defect list written in the defect list memory 8 and the zone configuration table 11, the system control unit 10 determines whether there is an empty block in the spare area provided in the zone where the defective block exists. If there is an empty block, an instruction to access the physical address is sent to the drive control circuit 7. The servo circuit 5 executes the process of moving the beam spot. In this case, however, there is no need to change the rotation speed of the spindle motor 2 because of an access command to the same zone.
【００４５】一方、欠陥ブロックの存在するゾーン（仮
にゾーンＮ）に設けられたスペア領域に空きブロックが
存在しない場合には、システム制御部１０は欠陥ブロッ
クの存在した光ディスク１上の情報記録層（仮に情報記
録層１）における別ゾーン（例えばゾーンＮ−１）のス
ペア領域ではなく、他の情報記録層（例えば情報記録層
２）における同一ゾーン（ゾーンＮ）のスペア領域に空
きブロックがあるかどうか確認する。そのスペア領域に
空きブロックがある場合、システム制御部１０はその物
理アドレスへのアクセス指示をドライブ制御回路７へ送
る。この指示に従ったアクセスにおいては、情報記録層
間（例えば情報記録層１から情報記録層２へ）のフォー
カスジャンプは必要となるが、同一ゾーンへの移動であ
るためスピンドルモータ２の回転数変更は生じない。通
常、フォーカスジャンプに要する時間とスピンドルモー
タ２の回転数変更後に回転数が安定するまでに掛かる時
間とでは後者の方が長いため、このような制御を行なう
ことにより同一情報記録層の別ゾーンへのアクセスに比
べるとアクセス時間の短縮が図れることになる。On the other hand, if there is no empty block in the spare area provided in the zone where the defective block exists (assuming that the zone is N), the system control unit 10 determines whether the information recording layer (the optical disk 1) on the optical disk 1 has the defective block. If there is an empty block in the spare area of the same zone (zone N) in another information recording layer (eg, information recording layer 2), not in the spare area of another zone (eg, zone N-1) in information recording layer 1) Check if it is. If there is an empty block in the spare area, the system control unit 10 sends an instruction to access the physical address to the drive control circuit 7. In the access according to this instruction, a focus jump between the information recording layers (for example, from the information recording layer 1 to the information recording layer 2) is required, but since the movement is to the same zone, the rotation speed of the spindle motor 2 cannot be changed. Does not occur. Normally, the time required for the focus jump and the time required for the rotation speed to stabilize after changing the rotation speed of the spindle motor 2 are longer, so that by performing such control, it is possible to move to another zone of the same information recording layer. In this case, the access time can be reduced as compared with the case of the above access.
【００４６】以上のような指定のスペア領域へアクセス
制御の後、欠陥ブロックの交替記録を行ない、二次欠陥
がある場合の一連の記録処理が完了する。このように、
複数の情報記録層を持つＤＶＤ−ＲＡＭにおいて、欠陥
管理方法におけるスペア領域の使用方法を工夫すること
により、ゾーン間のシークやディスク回転数変更による
オーバヘッド時間を低減させて転送速度の低下を防ぎ、
ユーザの使い勝手のよい書換え型光ディスク装置を提供
することができる。After access control to the designated spare area as described above, replacement recording of defective blocks is performed, and a series of recording processing when there is a secondary defect is completed. in this way,
In a DVD-RAM having a plurality of information recording layers, by devising a method of using a spare area in a defect management method, it is possible to reduce the overhead time due to seek between zones and a change in the number of rotations of a disk, thereby preventing a decrease in transfer speed.
A user-friendly rewritable optical disk device can be provided.
【００４７】[0047]
【発明の効果】以上詳述したように本発明によれば、特
に、情報記録層を複数所有するディスク状情報記録媒体
において、ディスクの記録フォーマットがＺＣＬＶ方式
のようなゾーン毎に回転数変動を伴うような仕様である
場合に、あるゾーンの交替処理用のスペア領域に空きが
ないときに、他の情報記録層における同一ゾーンのスペ
ア領域を交替処理に使用することにより、交替処理時に
回転数変更を伴わずに済み、アクセス時間が低減する。
したがって、同一情報記録層の別ゾーンのスペア領域を
使う場合に比べて平均転送速度の低下を抑えることがで
き、ユーザの使い勝手を格段に良くすることができる。As described in detail above, according to the present invention, in particular, in a disk-shaped information recording medium having a plurality of information recording layers, the recording format of the disk is such that the rotation speed fluctuation varies per zone as in the ZCLV system. When the spare area for spare processing in a certain zone has no free space, the spare area of the same zone in another information recording layer is used for No change is required, and access time is reduced.
Therefore, a decrease in the average transfer speed can be suppressed as compared with the case where a spare area in another zone of the same information recording layer is used, and the usability of the user can be significantly improved.
【図１】 ＤＶＤ−ＲＡＭディスクの領域構造を示す
図。FIG. 1 is a view showing an area structure of a DVD-RAM disk.
【図２】 スリップ交替の概念を示す図。FIG. 2 is a view showing the concept of slip replacement.
【図３】 スリップ交替時のスペア領域の使用方法を示
す図。FIG. 3 is a diagram showing a method of using a spare area at the time of slip replacement.
【図４】 リニア交替の概念を示す図。FIG. 4 is a diagram showing the concept of linear replacement.
【図５】 リニア交替時のスペア領域の使用方法を示す
図。FIG. 5 is a diagram showing a method of using a spare area during linear replacement.
【図６】 本発明に係る情報記録再生装置におけるスペ
ア領域の使用方法の一例を示す図。FIG. 6 is a diagram showing an example of a method of using a spare area in the information recording / reproducing apparatus according to the present invention.
【図７】 本発明に係る情報記録媒体の一例を示す断面
図。FIG. 7 is a sectional view showing an example of the information recording medium according to the present invention.
【図８】 本発明に係る情報記録媒体の一例を示す詳細
断面図。FIG. 8 is a detailed sectional view showing an example of the information recording medium according to the present invention.
【図９】 ＺＣＬＶ方式の光ディスクにおけるゾーン分
割例を示す図。FIG. 9 is a view showing an example of zone division in a ZCLV optical disk.
【図１０】 本発明に係る情報記録再生装置において、
欠陥セクタが検出された場合の交替処理の流れを示すフ
ローチャート。FIG. 10 shows an information recording / reproducing apparatus according to the present invention.
9 is a flowchart illustrating a flow of a replacement process when a defective sector is detected.
【図１１】 本発明に係る情報記録再生装置の基本構成
を示す図。FIG. 11 is a diagram showing a basic configuration of an information recording / reproducing apparatus according to the present invention.
１ 光ディスク ２ スピンドルモータ ３ 光ピックアップ ４ プリアンプ ５ サーボ回路 ６ リニアモータ ７ ドライブ制御回路 ８ 欠陥リストメモリ ９ インターフェース １０ システム制御部 １１ ゾーン構成表 １２ 信号処理回路 １３ バッファメモリ １４ レーザドライバ Reference Signs List 1 optical disk 2 spindle motor 3 optical pickup 4 preamplifier 5 servo circuit 6 linear motor 7 drive control circuit 8 defect list memory 9 interface 10 system control unit 11 zone configuration table 12 signal processing circuit 13 buffer memory 14 laser driver
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｇ１１Ｂ 20/18 ５７２ Ｇ１１Ｂ 20/18 ５７２Ｃ ５７２Ｆ (72)発明者 岡本 豊 神奈川県川崎市幸区小向東芝町１番地 株 式会社東芝研究開発センター内 (72)発明者 長谷川 裕 神奈川県川崎市幸区小向東芝町１番地 株 式会社東芝研究開発センター内 Ｆターム(参考） 5D044 AB01 BC04 CC04 DE12 DE62 DE66 5D090 AA01 BB04 BB12 CC01 CC14 DD03 DD05 EE02 FF27 FF38 HH03 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat 参考 (Reference) G11B 20/18 572 G11B 20/18 572C 572F (72) Inventor Yutaka Okamoto Toshiba Komukai, Yuuki-ku, Kawasaki-shi, Kanagawa No. 1 town Toshiba R & D Center (72) Inventor Hiroshi Hasegawa 1 Tokoba Toshiba R & D Center, Komukai-ku, Kawasaki-shi, Kanagawa F-term 5D044 AB01 BC04 CC04 DE12 DE62 DE66 5D090 AA01 BB04 BB12 CC01 CC14 DD03 DD05 EE02 FF27 FF38 HH03
Claims (7)
ク半径方向に関して分割された複数のゾーンで構成さ
れ、各ゾーンにおける線速度が一定となるように回転が
制御されるディスク状情報記録媒体において、 少なくとも２層の情報記録層を備え、そのうち少なくと
も２層の情報記録層は互いに同一のゾーン構成を有する
ことを特徴とするディスク状情報記録媒体。1. A disc-shaped information recording medium in which a data area for recording data is constituted by a plurality of zones divided in a radial direction of a disc and whose rotation is controlled so that a linear velocity in each zone is constant. A disc-shaped information recording medium comprising at least two information recording layers, wherein at least two information recording layers have the same zone configuration.
たときに、該欠陥セクタに記録されるべきデータを代わ
りに記録するためのスペア領域を更に具備することを特
徴とする請求項１記載のディスク状情報記録媒体。2. The apparatus according to claim 1, further comprising a spare area for recording data to be recorded in the defective sector when a defective sector is detected in the data area. Disc-shaped information recording medium.
設けられていることを特徴とする請求項２記載のディス
ク状情報記録媒体。3. The disk-shaped information recording medium according to claim 2, wherein the spare area is provided for each of the zones.
欠陥セクタが検出された場合に、該ディスク状情報記録
媒体にあらかじめ設定されたスペア領域の交替セクタ
に、該欠陥セクタに記録されるべきデータを代わりに記
録する情報記録再生装置において、 前記ディスク状情報記録媒体は少なくとも２層の情報記
録層を有し、そのうちの一層のデータ領域において発生
した欠陥セクタに記録されるべきデータを、他の情報記
録層のスペア領域の交替セクタに代わりに記録すること
を特徴とする情報記録再生装置。4. When a defective sector is detected in a data area of a disk-shaped information recording medium, data to be recorded in the defective sector is set in a spare sector of a spare area preset in the disk-shaped information recording medium. In the information recording / reproducing apparatus for recording the information instead, the disc-shaped information recording medium has at least two information recording layers, of which data to be recorded in a defective sector generated in a data area of one layer is replaced with another data. An information recording / reproducing apparatus for recording information instead of a spare sector in a spare area of an information recording layer.
タ領域は、ディスク半径方向に関して分割された複数の
ゾーンで構成され、各ゾーンにおける線速度が一定とな
るように前記ディスク状情報記録媒体の回転が制御され
ることを特徴とする請求項４記載の情報記録再生装置。5. The data area of the disc-shaped information recording medium is composed of a plurality of zones divided in a radial direction of the disc, and the rotation of the disc-shaped information recording medium is controlled such that the linear velocity in each zone is constant. 5. The information recording / reproducing apparatus according to claim 4, wherein:
に設けられており、前記情報記録層のうち少なくとも二
層は同一のゾーン構成を有し、そのうちの一の情報記録
層において前記欠陥セクタが存在する前記ゾーンに設け
られた前記スペア領域に使用可能なセクタがない場合
に、同一のゾーン構成を有する他の情報記録層における
同一のゾーンに設けられた前記スペア領域に、前記欠陥
セクタに記録されるべきデータを代わりに記録すること
を特徴とする請求項５記載の情報記録再生装置。6. The spare area is provided for each of the plurality of zones, at least two of the information recording layers have the same zone configuration, and the defective sector is located in one of the information recording layers. If there is no usable sector in the spare area provided in the existing zone, the defective sector is recorded in the spare area provided in the same zone in another information recording layer having the same zone configuration. 6. The information recording / reproducing apparatus according to claim 5, wherein data to be recorded is recorded instead.
方式の記録フォーマットを採用していることを特徴とす
る請求項４乃至６のいずれか一項に記載の情報記録再生
装置。7. The disk-shaped information recording medium is a ZCLV
The information recording / reproducing apparatus according to any one of claims 4 to 6, wherein the information recording / reproducing apparatus adopts a recording format of a system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09203699A JP3856980B2 (en) | 1999-03-31 | 1999-03-31 | Information recording / reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09203699A JP3856980B2 (en) | 1999-03-31 | 1999-03-31 | Information recording / reproducing device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004306343A Division JP4176699B2 (en) | 2004-10-21 | 2004-10-21 | Disc information recording medium, information recording apparatus, and information reproducing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000285607A true JP2000285607A (en) | 2000-10-13 |
| JP3856980B2 JP3856980B2 (en) | 2006-12-13 |
Family
ID=14043314
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09203699A Expired - Fee Related JP3856980B2 (en) | 1999-03-31 | 1999-03-31 | Information recording / reproducing device |
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| Country | Link |
|---|---|
| JP (1) | JP3856980B2 (en) |
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