JPS5933632A - Recording system of disk recording medium - Google Patents
Recording system of disk recording mediumInfo
- Publication number
- JPS5933632A JPS5933632A JP14282182A JP14282182A JPS5933632A JP S5933632 A JPS5933632 A JP S5933632A JP 14282182 A JP14282182 A JP 14282182A JP 14282182 A JP14282182 A JP 14282182A JP S5933632 A JPS5933632 A JP S5933632A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- information
- circuit
- recorded
- disk
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/24—Arrangements for providing constant relative speed between record carrier and head
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は円盤状記録媒体の記録方式に関し、特に同期信
号を含む情報信号を同心円状又は渦巻状の記録トラック
として記録する円盤状の情報記録媒体への記録方式に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording method for a disk-shaped recording medium, and more particularly to a recording method for a disk-shaped information recording medium in which an information signal including a synchronization signal is recorded as concentric or spiral recording tracks.
ビデオ信号等の同期信号を含む情報信号をＦＭ（周波数
変調）処理して円盤状記録媒体に記録したものにビデオ
ディスクがある。当該ビデオディスク（以下単にディス
クという）における情報記録方式としては、ＣΔ■（定
角速度）方式によるものと、ＣＩＪＶ（定線速度）方式
によるものとがある。A video disc is a disc-shaped recording medium in which an information signal including a synchronizing signal such as a video signal is subjected to FM (frequency modulation) processing and recorded on a disc-shaped recording medium. Information recording methods on the video disc (hereinafter simply referred to as a disc) include a CΔ■ (constant angular velocity) method and a CIJV (constant linear velocity) method.
ＣＡＶ方式により記録されたディスクにおいては、第１
図に示すように、記録トラック゛ｖ１．Ｉｌｌ、、 −
二の同期信号の記録部分（黒点にて示す）がすべて略同
−半径線上に整列して配置されている関係士、再生情報
に隣接トラックの同期信号が悪影響を及ぼすいわゆるク
ロストーク現象が少ない利点がある。For discs recorded using the CAV method, the first
As shown in the figure, recording track 'v1. Ill,, -
The recorded parts of the second synchronization signal (indicated by black dots) are all aligned on the same radius line, which has the advantage that there is little so-called crosstalk phenomenon where the synchronization signal of the adjacent track adversely affects the reproduced information. There is.
その反面、内周トラックに比し外周トランクの線速度が
より犬となるために、内周トラックにおける１水甲同ｊ
υ」期間長ｔ１を適当に設定した場合、外周トランクで
は必要以十の区間長ｔ２を要することとなる。その結果
、記録密度をあまり大とすることができず長時間の情報
記録には不都合となる。On the other hand, since the linear velocity of the outer trunk is faster than that of the inner track, the linear velocity of the outer trunk is faster than that of the inner track.
υ'' If the period length t1 is set appropriately, the outer trunk will require a section length t2 that is ten times longer than necessary. As a result, the recording density cannot be increased too much, which is inconvenient for long-term information recording.
−・方、ＣＬＶ方式により記録されたディスクにおいて
は、第２図に示す如く各トラック＋ｐ 、 、 Ｔ＋Ｌ
−、。- On the disc recorded by the CLV method, each track +p, , T+L as shown in Figure 2.
-,.
Ｉｌｌ、、、七の１水平開期期間長ｔ１はすべて等しく
なるので記録密度が火となり、長時間の情報記録に好適
となっている。１〜かしながら、水平同期信号記録部分
（同じく黒点にて示す）が同一半径線上に整列して記録
されていないために、隣接トラックの情報に上り丙申情
報が悪影響をうけるいわゆるクロストーク現象が顕著と
なる。すなわち、映像信号に対応したＩｉ”Ｍ信号が記
録されている区間に、水下同期信号に対応したＩ”Ｍ信
号がクロストークとして漏洩すると、これを検波して得
られた再生情報には画周波数の差に応じだビート成分が
混入して、映像再生装置における画面十にこれが現出す
るからである。Since the horizontal opening period lengths t1 of Ill, . 1) However, because the horizontal synchronization signal recording portion (also indicated by black dots) is not recorded aligned on the same radius line, there is a so-called crosstalk phenomenon in which the information of the adjacent track is adversely affected. becomes noticeable. In other words, if the I"M signal corresponding to the underwater synchronization signal leaks as crosstalk in the section where the Ii"M signal corresponding to the video signal is recorded, the playback information obtained by detecting this leaks. This is because beat components are mixed in depending on the frequency difference and appear on the screen of the video reproducing device.
このように、（月）■方式によるディスクは長１ｔ；、
ｉ １１ｆｌの情報の記録には適しているが、クロスト
−りによる画面への悪影響は避けられないという欠点を
有している。In this way, the disk according to the (monthly) method is 1 t long;
Although this method is suitable for recording 11fl information, it has the disadvantage that the adverse effect on the screen due to crosstalk cannot be avoided.
本発明は手記従来技術の欠点に鑑みてなされたものであ
り、その目的とするところは、丙申時におけるクロスト
ークによる再生画像への悪影響を軽減しかつ長時間の情
報記録を勇能とした円盤状記録媒体の記録方式を提供す
ることにある。The present invention has been made in view of the shortcomings of the conventional handwriting technology, and its purpose is to reduce the adverse effect on the reproduced image due to crosstalk at the time of failure and to make long-term information recording more efficient. An object of the present invention is to provide a recording method for a disc-shaped recording medium.
本発明による円盤状記録媒体の記録方式は、記録媒体の
記録領域のうち情報記録トラックの曲率１″径が比較的
小なる部分においては回転角速度を変化さぜつつ線速度
一定となるように記録し、曲率１″径が比較的太なる部
分においては回転角速度を一定として記録するようにし
たことを特徴としている。The recording method of the disc-shaped recording medium according to the present invention records information so that the linear velocity is constant while changing the rotational angular velocity in a portion of the recording area of the recording medium where the curvature of the information recording track is relatively small. However, it is characterized in that the rotational angular velocity is recorded as constant in the portion where the curvature 1'' diameter is relatively thick.
第３図は本発明の実ＭＤ例の概略ブロック図であり、光
学的記録方式に適用した場合の例である。FIG. 3 is a schematic block diagram of an actual MD example of the present invention, and is an example when applied to an optical recording method.
図において、スピン１゛ルリ゛−ボ回路１１のザーポ出
力によりスピンドルモータ１２が回転駆動制御されてお
り、これに応じて情報記録ディスク１３が回転する様に
なっている。情報記録ディスク１３０表面には、フＡト
レノスト等の光感応桐料が塗付されており、レーザー光
源１４から照射される光に応じて感光するようになって
いる。In the figure, a spindle motor 12 is rotationally controlled by the servo output of a spin 1 reverberation circuit 11, and an information recording disk 13 is rotated accordingly. The surface of the information recording disk 130 is coated with a photosensitive paulownia material such as Futrenost, so that it becomes sensitive to light emitted from the laser light source 14.
ここで、レーザー光源１４から照射される光は、ト】１
０変換（電気／光変換）装置１５によって、入力端子１
６から入力され、ＦＭ変調回路１７によって変調された
情報信号に応じたレーザー光線の通過／非通過状態に変
換された後、固定ミラー１８及び集光レンズ１９を介し
て情報記録ディスク１３の表面に照射されている。この
情報記録ディスク１３の回転状態はロータリーエンコー
ダ等による回転検出回路２０によって検出され、この検
出回路と後述する可変分周回路２１の出力をスピンドル
モーボ回路内で周波数・位相比較する事によって、スぎ
ンドルモータ１２の制御信号を得ている。Here, the light emitted from the laser light source 14 is
0 conversion (electrical/optical conversion) device 15, input terminal 1
After the laser beam is converted into a passing/non-passing state according to the information signal input from 6 and modulated by the FM modulation circuit 17, it is irradiated onto the surface of the information recording disk 13 via the fixed mirror 18 and the condensing lens 19. has been done. The rotational state of the information recording disk 13 is detected by a rotation detection circuit 20 using a rotary encoder or the like, and by comparing the frequency and phase of this detection circuit and the output of a variable frequency dividing circuit 21 (described later) in a spindle motor control circuit. A control signal for the grinder motor 12 is obtained.
一方、キャリツノサーボ回路２２が設けられており、こ
のザーボ出力によりギヤ１ルソモータ２３の駆動が制御
されて、情報記録手段である記録レーザ光と、情報記録
ディスクとの半径方向の相対位置の移動制御がなされる
。−１記相ズ；１位置は、リニアエンコータ等による位
置検出回路２４により検出されて、ザーボ回路２２へ帰
還され後述する線速度検出回路２６及び制御回路２７に
も供給されている。ザｓ７回路２２には、さらに回転検
出回路の出力が入力されており、記録ディスクの回転に
応じて正しいピッチで情報トラックが形成さ才する様に
キＡ、リッツモータ２３の回転が制御されている。On the other hand, a caliper servo circuit 22 is provided, and the drive of the gear 1 ruso motor 23 is controlled by the servo output to move the relative position in the radial direction between the recording laser beam, which is the information recording means, and the information recording disk. Control is exercised. -1 phase: The 1 position is detected by a position detection circuit 24 using a linear encoder or the like, fed back to the servo circuit 22, and also supplied to a linear velocity detection circuit 26 and a control circuit 27, which will be described later. The output of the rotation detection circuit is further input to the S7 circuit 22, and the rotation of the key A and Litz motor 23 is controlled so that information tracks are formed at the correct pitch according to the rotation of the recording disk. There is.
ここで、スピンドルモーパ？回路１１においてｄ：、水
晶発振器等よりなる発振回路２５より出力した信号をｐ
ｌ変カウンタ等よりなるｎ１変分周回路２１によって所
定の割合で分周された出力と、回転検出回路２１の出力
との周波数・位相比較により、スピンドルモータ１２の
制御信号を得ている。さらに、分周回路２１における分
周１１戸ｔ、は、位置検出回路２４と回転検出回路２０
との出力とを用いて、線速度検出回路２６にて演ηされ
た絶速度情報に応じた制御回路２７の出力によって順次
変化さｉｔ、る様になっている。Where is Spindle Mopa? In the circuit 11, d:, the signal output from the oscillation circuit 25 consisting of a crystal oscillator, etc.
A control signal for the spindle motor 12 is obtained by comparing the frequency and phase of the output frequency-divided at a predetermined ratio by the n1 variable frequency dividing circuit 21, which is an l variable counter or the like, and the output of the rotation detection circuit 21. Furthermore, the frequency division 11 units t in the frequency division circuit 21 are the position detection circuit 24 and the rotation detection circuit 20.
It is designed to be sequentially changed by the output of the control circuit 27 in accordance with the absolute velocity information calculated by the linear velocity detection circuit 26 using the outputs of and.
即ち、記録線速度Ｖを、回転検出器２０により検出され
る記録ディスクの角速度ωと、位置検出回路２４により
検ＩＩ’される記録ディスク１３の回転中心から情報記
録点１）ｔでの距離ｒとによって、線速度検出回路２６
においてυ−ｒωの関係で演算し、この線速度１ノが所
定の範囲となる様に段階的に分周比７しを変化させてゆ
くのである。尚、分周の割合が変更される位置は後述す
る如くディスク十の所定の位置に限られる為、副側１回
路には位置検出回路２４の出力が入力されている。That is, the recording linear velocity V is determined by the angular velocity ω of the recording disk detected by the rotation detector 20 and the distance r at the information recording point 1) t from the rotation center of the recording disk 13 detected by the position detection circuit 24. The linear velocity detection circuit 26
The calculation is performed using the relationship υ-rω, and the frequency division ratio 7 is gradually changed so that the linear velocity 1 is within a predetermined range. Incidentally, since the position where the frequency division ratio is changed is limited to a predetermined position on the disk 10 as described later, the output of the position detection circuit 24 is inputted to the sub-side 1 circuit.
以−Ｆに第４図に従って第３図のブロックの動作を説明
する。第４図（σ）は清報の記録を記録ディスク１３の
内周から外周に向って行った場合におけるトラック線速
度ＩＩの変化を表している。区間へにおいては、分周回
路２１における分周比を次第に変化さ１）で内周から外
周に行くに従ってスピンドルモータ１２の回転角速度ω
を図（ｈ）のように減じてｌ・ラック線速度１１を一定
に保っている。すなわち記録トランクの曲率半径７゛が
比較的小なる区間ΔではＣｌノＶ方式で記録する。Hereinafter, the operation of the blocks in FIG. 3 will be explained with reference to FIG. 4. FIG. 4 (σ) shows the change in the track linear velocity II when the recording of fresh information is carried out from the inner circumference to the outer circumference of the recording disk 13. In the section, the frequency dividing ratio in the frequency dividing circuit 21 is gradually changed (1), and the rotational angular velocity ω of the spindle motor 12 increases from the inner circumference to the outer circumference.
is reduced as shown in Figure (h) to keep l/rack linear velocity 11 constant. That is, in the section Δ where the radius of curvature of the recording trunk is relatively small, 7°, recording is performed using the Cl-V method.
キャリノゾモータ２３の回転に従い記録トラックの曲率
半径ｒが所定値７１，５となったことを位置検出回路２
４が検出すると、制御回路２７へ制御信号が送出される
。そして、情報記録位置がこの曲率半径ｒ７＋に相当す
る位置を越えると、制御回路２７によりスピンドルモー
ボ回路［１に供給される可変分周回路２１の出力を一定
周波数となるようにし、スピンドルモータ１２の回転数
が一定となるＣＡＶ動作へ移行する。このＣＡＭ動作期
間（区間１３）においては同期信号記録部分を相隣るト
ランク同士において略同−半径線上に整列配置させて、
クロストークを除く必要があることから、とのＣＡＶ動
作への切替えを行うディスク半径位置は所定箇所に限ら
れることになる。よって位置検出回路２４の出力に応じ
てこの切替動作が制御されることになる。すなわち、本
発明の目的たる隣接トラック間での同期信号記録部分を
略同−半径線上に位置せしめるには、ＣＡｖ動作に移る
ときにおける半径ｒｒｔｃｈ」する円周長が１水平向期
即Ｊ間寸たはより好捷しくは１垂直間期間に相当する長
さＳの整数倍の関係を満たず必要があり、ま−）て次式
の関係を満足する半径ｒｒＬにおいて切替えが必要とな
る。The position detection circuit 2 detects that the radius of curvature r of the recording track has reached a predetermined value of 71.5 as the caliper motor 23 rotates.
4 is detected, a control signal is sent to the control circuit 27. When the information recording position exceeds the position corresponding to the radius of curvature r7+, the control circuit 27 makes the output of the variable frequency divider circuit 21 supplied to the spindle motor circuit [1] a constant frequency, and Shifts to CAV operation where the rotation speed is constant. During this CAM operation period (section 13), the synchronization signal recording portions are aligned on approximately the same radius line between adjacent trunks,
Since it is necessary to eliminate crosstalk, the disk radial position at which switching to CAV operation is performed is limited to a predetermined location. Therefore, this switching operation is controlled according to the output of the position detection circuit 24. That is, in order to position the synchronization signal recording portions between adjacent tracks on substantially the same radius line, which is the object of the present invention, the circumference length of the radius rrtch when moving to the CAv operation must be the same as the distance J in one horizontal direction. Or, more preferably, it is necessary to satisfy the relationship of an integer multiple of the length S corresponding to one vertical interval, and it is necessary to switch at a radius rrL that satisfies the following relationship.
ｒｎ＝ ｔｎ Ｓ ／ ２ ｙｒ −−（１
）ｍは整数（直である。rn=tn S/2 yr --(1
) m is an integer (direct).
ここで、最内周トラックとその隣接トラックとの間での
同期信号は同一半径線上に記録されているとすると、上
記長さＳは次式で与えられる。Here, assuming that the synchronization signals between the innermost track and its adjacent track are recorded on the same radius line, the length S is given by the following equation.
Ｓ＝２π７−ｏ−ｆ１／ｆ、２ −（２）ここに、ｒ
ｏｉｌ−ｉ最内周トランク同士、ｆｌはその時のディス
ク回転周波数（例えば３０ｆｉｚ ）で、またｆ２は水
平同期信号周波数（１５，７５ｋＨｚ ）または垂直同
期信号周波数Ｃ６０１１ｚ）である。従ッテ、（］）
、 （２）式よりＣＡ、Ｖへ切替わるときの半径ｒ、１
．は、ｒｎ＝ｍｒｏ−ｆ１／ｆ２・＝−・・（３＞とな
る。この（３）式で示されるｒＩｔＯ値を制御回路２７
に記憶させておくか演算によって求めるようにし、この
ｒ＋Ｌに相当する位置において、ＣＬＶからＣＡＶ方式
への動作切換が行われるようにする。S=2π7-o-f1/f, 2-(2) where, r
Between the oil-i innermost trunks, fl is the disk rotation frequency at that time (for example, 30fiz), and f2 is the horizontal synchronization signal frequency (15,75kHz) or vertical synchronization signal frequency C6011z). Follow, (])
, From equation (2), the radius r, 1 when switching to CA and V
．． is rn=mro-f1/f2=-...(3>).The rItO value shown by this equation (3) is set by the control circuit 27.
The value is stored in or calculated, and the operation is switched from CLV to CAV at the position corresponding to r+L.
本発明による記録方式によれば、内周部分でＣＩ・Ｖ方
式で記録し他の外周部を（’ＡＶ方式にて記録するもの
であるから、視覚上比較的クロスト−り現象の少ないＣ
ＡＶ方式の記録をより長時間とずれば、従来のＣ１，、
Ｖ方式のみの記録に比しクロスｌ−−りによる悪影響ｄ
：著しく軽減される。史には、ＣＡＶ方式のみの記録に
比しよう長時間の記録が＋ｉＪ能となる。According to the recording method according to the present invention, since the inner circumferential portion is recorded using the CI/V method and the other outer circumferential portion is recorded using the
If the AV format recording is extended for a longer time, the conventional C1,...
Compared to recording using only the V method, there is an adverse effect due to cross-linking.
: Significantly reduced. Historically, long-time recording has a +iJ performance compared to recording using only the CAV method.
また、クロスト−り現象は、情報読取用スポット光の光
軸と記録面とのなす角度に依存する事実がちり、記録デ
ィスクでは外周にいくにつれて面す
ｉＡ／／ｌ：犬となって、当該角度により生ずるクロス
トークは外周部の方が内周部に比し著しく大となる。In addition, the cross-steering phenomenon depends on the angle formed between the optical axis of the spot light for information reading and the recording surface. The crosstalk caused by the angle is significantly larger at the outer circumference than at the inner circumference.
従って、たとえば外周部においてＣＬＶ方式を用いて記
録すれば、ＣＬ Ｖ方式自身の有するクロストーク現象
の他に上述した当該角度によるクロストークり現象が加
わり合って画質劣化は著しくなる。そこて、本願の如く
、外周においてはＣＡ、Ｖ方式とし、内周においてはＣ
ＬＶ方式とすればクロストーク現象はより減少させるこ
とができるのである。Therefore, for example, if recording is performed using the CLV method in the outer periphery, the above-mentioned crosstalk phenomenon due to the angle is added to the crosstalk phenomenon inherent in the CLV method itself, resulting in significant image quality deterioration. Therefore, as in the present application, the outer circumference uses CA and V methods, and the inner circumference uses C.
If the LV method is used, the crosstalk phenomenon can be further reduced.
尚、内周部のＣＬ Ｖ記録帯のトラックピッチを外周部
のＣＡＶ記録帯のそれより大とするようにして、トラッ
クピンチによるクロスト−りを減少させるようにするこ
とができる。Note that by making the track pitch of the CLV recording band at the inner circumference larger than that of the CAV recording band at the outer circumference, it is possible to reduce crosstalk due to track pinch.
尚、本発明は光学式記録媒体のみならず他の静電式記録
媒体にも適用できることは勿論である。It goes without saying that the present invention is applicable not only to optical recording media but also to other electrostatic recording media.
第１図はＣＡＶ方式による記録ディスクの１部を示す図
、第２図はＣＬＶ方式による記録ディスクの１部を示す
図、第３図は本発明の実施例のブロック図、第４図１は
第３図のブロックの動作を説明する図である。
主要部分の符号の説明
１１・・・スピンドルザーｄ？
１２・・スピンドルモータ
１３・・・記録ディスク ２１・・・可変分
周回路２７・・制御回路FIG. 1 is a diagram showing a part of a recording disk using the CAV method, FIG. 2 is a diagram showing a part of a recording disk using the CLV method, FIG. 3 is a block diagram of an embodiment of the present invention, and FIG. FIG. 4 is a diagram illustrating the operation of the blocks in FIG. 3; Explanation of symbols of main parts 11...Spindlezer d? 12...Spindle motor 13...Recording disk 21...Variable frequency dividing circuit 27...Control circuit
Claims (3)
報の記録をなす円盤状記録媒体の記録方式であって、記
録媒体の記録領域のうち前記情報記録トランクの曲率半
径が所定値以下の範囲においては記録トラックの線速度
が一定となるように記録し、前記曲率半径が前記所定値
を越える範囲においては前記回転角速度を一定として記
録するようにしたことを特徴とする記録方式。(1) A recording method for a disk-shaped recording medium in which information is recorded as concentric or spiral information recording tracks, in which the radius of curvature of the information recording trunk is within a predetermined value within the recording area of the recording medium. A recording method characterized in that recording is performed so that the linear velocity of the recording track is constant, and recording is performed with the rotational angular velocity constant in a range where the radius of curvature exceeds the predetermined value.
１１記回転角速度を一定として記録した範囲においては
前記同期信号が略同−半径線上に整列して配置される如
き角速度として前記情報の記録をなすようにしたことを
特徴とする特許請求の範囲第１項記載の記録方式。(2) The information includes a predetermined periodic signal, and 1
11. In a range in which the rotational angular velocity is recorded as constant, the information is recorded as an angular velocity such that the synchronization signals are arranged substantially on the same radius line. Recording method described in Section 1.
号であり、前記同期信号は水平同期信号であることを特
徴とする特許請求の範囲第１項又ｄ、第２項記載の記録
方式。(3) The recording method according to claim 1, d, or 2, wherein the PJff information signal is a video format signal, and the synchronization signal is a horizontal synchronization signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14282182A JPS5933632A (en) | 1982-08-18 | 1982-08-18 | Recording system of disk recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14282182A JPS5933632A (en) | 1982-08-18 | 1982-08-18 | Recording system of disk recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5933632A true JPS5933632A (en) | 1984-02-23 |
| JPH0352148B2 JPH0352148B2 (en) | 1991-08-09 |
Family
ID=15324403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14282182A Granted JPS5933632A (en) | 1982-08-18 | 1982-08-18 | Recording system of disk recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5933632A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5136560A (en) * | 1989-02-21 | 1992-08-04 | Pioneer Electronic Corporation | CAV/CLV composite disk accessing method utilizing different accessing procedures for respective CAV and CLV areas |
| US5424015A (en) * | 1992-09-29 | 1995-06-13 | Yamashita Rubber Kabushiki Kaisha | Method and device for manufacturing rubber bend pipe |
| US5592451A (en) * | 1994-06-22 | 1997-01-07 | Victor Company Of Japan, Ltd. | Test-writing controlling method for optical disk recording device |
-
1982
- 1982-08-18 JP JP14282182A patent/JPS5933632A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5136560A (en) * | 1989-02-21 | 1992-08-04 | Pioneer Electronic Corporation | CAV/CLV composite disk accessing method utilizing different accessing procedures for respective CAV and CLV areas |
| US5424015A (en) * | 1992-09-29 | 1995-06-13 | Yamashita Rubber Kabushiki Kaisha | Method and device for manufacturing rubber bend pipe |
| US5592451A (en) * | 1994-06-22 | 1997-01-07 | Victor Company Of Japan, Ltd. | Test-writing controlling method for optical disk recording device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0352148B2 (en) | 1991-08-09 |
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