JPH04337542A - Magneto-optical recording medium and magneto-optical recording method - Google Patents
Magneto-optical recording medium and magneto-optical recording methodInfo
- Publication number
- JPH04337542A JPH04337542A JP13726291A JP13726291A JPH04337542A JP H04337542 A JPH04337542 A JP H04337542A JP 13726291 A JP13726291 A JP 13726291A JP 13726291 A JP13726291 A JP 13726291A JP H04337542 A JPH04337542 A JP H04337542A
- Authority
- JP
- Japan
- Prior art keywords
- magneto
- recording
- optical recording
- power
- 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.)
- Pending
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【０００１】0001
【産業上の利用分野】本発明は書き換えが可能な光磁気
記録媒体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rewritable magneto-optical recording medium.
【０００２】0002
【従来の技術及び発明が解決しようとする課題】現在、
上市されている光磁気記録媒体及び光磁気記録再生装置
（ドライブ）では、媒体がドライブにローディングされ
るとドライブはコントロールトラックにプリフォーマッ
トされているメディア情報（記録、再生、消去パワー、
パルス幅）を読み取って、記録、再生、消去条件を決定
し、光磁気記録を行っている。この方法を用いた場合、
初期においては問題はないが、経時的にピックアップ（
主に対物レンズ）にゴミなどがついてくると、ドライブ
自体はコントロールトラックの情報どおりに記録、再生
、消去を行っても、媒体上ではパワーの低下が起こり、
所定の信号レベルが得られず、記録、再生が正確に行え
なくなる。レンズのクリーニングを定期的に行えば、問
題の出る確率は減るが、レンズのクリーニングを定期的
に行うことは実質、困難である。[Prior art and problems to be solved by the invention] Currently,
In magneto-optical recording media and magneto-optical recording and reproducing devices (drives) on the market, when a medium is loaded into the drive, the drive stores preformatted media information (recording, playback, erasing power,
The pulse width) is read to determine the recording, reproducing, and erasing conditions, and magneto-optical recording is performed. When using this method,
There is no problem in the beginning, but it picks up over time (
If dust gets on the object lens (mainly the objective lens), the power on the medium will decrease, even if the drive itself records, plays, and erases according to the information on the control track.
A predetermined signal level cannot be obtained, and recording and reproduction cannot be performed accurately. If you clean your lenses regularly, the chances of problems occurring will decrease, but it is actually difficult to clean your lenses regularly.
【０００３】本発明はこのような従来技術の問題点に鑑
みてなされたもので、常に最適な記録、再生パワーに設
定して記録、再生を行うことができ、エラーの発生の少
ない光磁気記録媒体及び光磁気記録方法を提供すること
を目的とする。The present invention has been made in view of the problems of the prior art, and provides a magneto-optical recording system that allows recording and reproduction to be performed by always setting the optimum recording and reproduction power, and that causes fewer errors. The purpose is to provide a medium and a magneto-optical recording method.
【０００４】0004
【課題を解決するための手段】上記目的を達成するため
、本発明によれば、レーザ光を用いて情報の記録、再生
及び消去を行う書き換え可能な光磁気記録媒体において
、当該媒体の内周及び外周の少なくとも一方に記録、再
生パワー調整用の領域を設けたことを特徴とする光磁気
記録媒体が提供される。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a rewritable magneto-optical recording medium for recording, reproducing and erasing information using a laser beam. A magneto-optical recording medium is provided, characterized in that a region for adjusting recording and reproducing power is provided on at least one of the outer periphery.
【０００５】また、本発明によれば、上記の光磁気記録
媒体を用い、前記記録、再生パワー調整用の領域におい
て記録、再生を行い、所定の信号レベルが得られるよう
に記録、再生パワーを調整することを特徴とする光磁気
記録方法が提供される。Further, according to the present invention, using the magneto-optical recording medium described above, recording and reproduction are performed in the recording and reproduction power adjustment area, and the recording and reproduction power is adjusted so as to obtain a predetermined signal level. A magneto-optical recording method is provided which is characterized by adjusting.
【０００６】[0006]
【作用】媒体がドライブにロードされた後、コントロー
ルトラック情報を読み、媒体の内周及び外周の少なくと
も一方に設けてある記録、再生パワー調整用領域にて記
録・再生を行い、所定の信号レベルが得られるように記
録、再生パワーを調整する。これにより、経時的に付着
するゴミ等にも拘らず、常に正確な記録、再生を行うこ
とができるようになる。[Operation] After the medium is loaded into the drive, the control track information is read, and recording/reproduction is performed in the recording/reproducing power adjustment area provided on at least one of the inner and outer circumferences of the medium, and the predetermined signal level is adjusted. Adjust the recording and playback power so that This makes it possible to always perform accurate recording and reproduction despite dust and the like that accumulate over time.
【０００７】[0007]
【実施例】以下本発明を実施例に基づき詳細に説明する
。本実施例に係る光磁気記録媒体は、その内周及び外周
の少なくとも一方に記録、再生パワー調整用領域を設け
る。この記録、再生パワー調整用領域は、内周はユーザ
エリアの内側に、外周はユーザエリアの外側に設ける。EXAMPLES The present invention will be explained in detail below based on examples. The magneto-optical recording medium according to this embodiment is provided with a recording/reproducing power adjustment area on at least one of its inner circumference and outer circumference. The recording/reproducing power adjustment area is provided with an inner periphery inside the user area and an outer periphery outside the user area.
【０００８】上記の媒体をドライブにローディングした
後、ドライブはコントロールトラック情報を読み、媒体
の内、外周の少なくとも一方に設けてある記録、再生パ
ワー調整用領域にて、記録、再生を行う。この時、記録
、再生パワー調整用領域に記録すべき信号は例えば図１
の（ａ）に示すようなもので、該領域には図１の（ｂ）
に示すような記録マークが形成される。この記録マーク
をドライブ側で読み取ったときの再生信号は図１の（ｃ
）のようになる。この時、予め再生信号にスレッシュレ
ベル（閾値）を設けておく。記録パワーが適切な場合に
は図１（ｃ）のように再生信号のピーク値がスレッシュ
レベルを越え、ドライブ側で再生信号を微分することに
より図１の（ｄ）のような微分波形が得られ、この微分
波形より図１の（ｅ）のような２値化信号が得られる。
一方、記録パワーが足りない場合は、記録マークは図２
の（ｂ）のようになり、得られる再生信号はスレッシュ
レベルを越えないため、２値化信号は得られない。そこ
でドライブがパワー調整を行い、再生信号がスレッシュ
レベルを越えるような記録、再生、消去条件に設定し直
す（図２の（ｃ’））。After loading the medium into the drive, the drive reads the control track information and performs recording and reproduction in a recording and reproduction power adjustment area provided on at least one of the inner and outer peripheries of the medium. At this time, the signals to be recorded in the recording/reproducing power adjustment area are as shown in FIG.
(b) of FIG.
A recording mark as shown in is formed. The playback signal when this recording mark is read on the drive side is shown in Figure 1 (c
)become that way. At this time, a threshold level (threshold value) is set in advance for the reproduced signal. When the recording power is appropriate, the peak value of the reproduced signal exceeds the threshold level as shown in Figure 1(c), and by differentiating the reproduced signal on the drive side, a differentiated waveform as shown in Figure 1(d) can be obtained. A binarized signal as shown in FIG. 1(e) is obtained from this differential waveform. On the other hand, if the recording power is insufficient, the recording marks will be
(b), and since the obtained reproduced signal does not exceed the threshold level, a binarized signal cannot be obtained. Therefore, the drive adjusts the power and resets the recording, playback, and erase conditions such that the playback signal exceeds the threshold level ((c') in FIG. 2).
【０００９】消去、記録、再生パワーの調整は図３に示
すように、（ｉ）記録（消去）パワーと再生パワーを増
加させる、（ｉｉ）記録（消去）パワーのみを増加させ
る、の２通りの方法があるが、コントロールトラック情
報の再生パワーを越えない範囲では（ｉ） の方法で調
整を行い、それでも十分でない場合には（ｉｉ）の方法
で調整を行う。
消去パワーは記録パワーと同じパワーに設定することが
望ましい。Erasing, recording, and reproducing power can be adjusted in two ways as shown in FIG. 3: (i) increasing the recording (erasing) power and reproducing power, and (ii) increasing only the recording (erase) power. However, as long as the reproduction power of the control track information is not exceeded, the adjustment is performed using method (i), and if that is not sufficient, adjustment is performed using method (ii). It is desirable to set the erasing power to the same power as the recording power.
【００１０】0010
【発明の効果】以上詳細に説明したように、本発明によ
れば、媒体をドライブにローディングした後、媒体に設
けた記録、再生パワー調整用領域を利用して、最適な記
録、再生パワーに設定して記録、再生、消去を行うこと
ができるので、常に正確な記録、再生を行える。従って
、エラーの発生が少ない媒体、システムを提供すること
が可能となる。As described in detail above, according to the present invention, after a medium is loaded into a drive, the recording/playback power adjustment area provided on the medium is used to adjust the optimum recording/playback power. Since recording, playback, and erasing can be performed by setting, accurate recording and playback can always be performed. Therefore, it is possible to provide a medium and a system in which fewer errors occur.
【図面の簡単な説明】[Brief explanation of the drawing]
【図１】本発明の光磁気記録媒体を用いて記録、消去、
再生パワーを調整する方法の説明図である。FIG. 1: Recording, erasing, and
FIG. 3 is an explanatory diagram of a method of adjusting reproduction power.
【図２】本発明の光磁気記録媒体を用いて記録、消去、
再生パワーを調整する方法の説明図である。FIG. 2: Recording, erasing, and recording using the magneto-optical recording medium of the present invention.
FIG. 3 is an explanatory diagram of a method of adjusting reproduction power.
【図３】記録、再生、消去パワーの調整の仕方を示す図
である。FIG. 3 is a diagram showing how to adjust recording, reproducing, and erasing power.
Claims (2)
び消去を行う書き換え可能な光磁気記録媒体において、
当該媒体の内周及び外周の少なくとも一方に記録、再生
パワー調整用の領域を設けたことを特徴とする光磁気記
録媒体。[Claim 1] A rewritable magneto-optical recording medium that records, reproduces and erases information using a laser beam,
1. A magneto-optical recording medium, characterized in that a region for adjusting recording and reproducing power is provided on at least one of the inner circumference and outer circumference of the medium.
い、前記記録、再生パワー調整用の領域において記録、
再生を行い、所定の信号レベルが得られるように記録、
再生パワーを調整することを特徴とする光磁気記録方法
。2. Using the magneto-optical recording medium according to claim 1, recording,
Perform playback and record to obtain the specified signal level.
A magneto-optical recording method characterized by adjusting reproduction power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13726291A JPH04337542A (en) | 1991-05-13 | 1991-05-13 | Magneto-optical recording medium and magneto-optical recording method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13726291A JPH04337542A (en) | 1991-05-13 | 1991-05-13 | Magneto-optical recording medium and magneto-optical recording method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04337542A true JPH04337542A (en) | 1992-11-25 |
Family
ID=15194557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13726291A Pending JPH04337542A (en) | 1991-05-13 | 1991-05-13 | Magneto-optical recording medium and magneto-optical recording method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04337542A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6288992B1 (en) | 1997-06-24 | 2001-09-11 | Sharp Kabushiki Kaisah | Optical reproducing device and optical memory medium |
| KR100323175B1 (en) * | 1997-06-24 | 2002-03-08 | 마찌다 가쯔히꼬 | Optical reproducing device and optical memory medium |
-
1991
- 1991-05-13 JP JP13726291A patent/JPH04337542A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6288992B1 (en) | 1997-06-24 | 2001-09-11 | Sharp Kabushiki Kaisah | Optical reproducing device and optical memory medium |
| KR100323175B1 (en) * | 1997-06-24 | 2002-03-08 | 마찌다 가쯔히꼬 | Optical reproducing device and optical memory medium |
| US6847592B2 (en) | 1997-06-24 | 2005-01-25 | Sharp Kabushiki Kaisha | Optical reproducing device and optical memory medium |
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