JPS61139984A - Optical disk device - Google Patents
Optical disk deviceInfo
- Publication number
- JPS61139984A JPS61139984A JP26130784A JP26130784A JPS61139984A JP S61139984 A JPS61139984 A JP S61139984A JP 26130784 A JP26130784 A JP 26130784A JP 26130784 A JP26130784 A JP 26130784A JP S61139984 A JPS61139984 A JP S61139984A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- track
- circuit
- error
- data
- 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
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は元ディスク装置に係り、特に光ディスクに情報
を記録す44合の記録情報の保Fa全確実にすまための
元ディスク装置に関すZo〔従来の技術〕
近時光ディスクに於ては再生専用ディスクだけでなく、
テルル酸化物等の薄膜を用いて予め記録された情報以外
に追加記録の可能な光デイスク装置も提案さnてい芝。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a source disk device, and more particularly to a source disk device for ensuring the integrity of recorded information in 44 times when information is recorded on an optical disk. [Prior art] Recently, optical discs are not only playback-only discs, but also
An optical disk device has also been proposed that uses a thin film of tellurium oxide or the like to record additional information in addition to pre-recorded information.
この場合、一般にこの穂元ディスクのデータ記eK於て
け、元ディスクに予めセクタを設は記録後に直ちに記録
内容のチェック確認を行ない、誤シがあ九ば他のセクタ
等に同一データを書き直す様にしてい芝。In this case, in general, when recording data on the original disk, if you set sectors on the original disk in advance, check the recorded contents immediately after recording, and if there is an error, rewrite the same data in another sector, etc. Shishi Shiba.
この様なデータ書き直し時に外部撮動が加わってトラッ
ク飛び等が生ず芝と元の正しく臀かハたデータと同一デ
ータを再び記録すえことになり、特に同一データ金前の
トラックに再び記録すA様な場合には正しいデータを損
うことにな石0又、記録す2データが音声信号の様な連
続していえこと及びセクタのロスを少くすえ71cめト
ラックエラー信号だけのプリグループの様なものが一般
的でろ刃先に述べたトラックエラがあえとディスク會取
フ替えて記録のやり直しを行ってい乙、この為に生演奏
t−碌音す2場合にはa数の元ディスク装置を並列運転
す4必要があった0
〔問題点を解決するための手段及び作用〕本発明は上記
整置に鑑みなされたもので音声信号情報等のデータ記録
においても誤って記録ずみのトラックデータを損う恐れ
なく、連続的に記録しう4光デイスク装置を得んとする
ものでこの為に本発明では記録中にトラックエラを監視
し、この際のノイズを検出し該ノイズが一定以上現われ
ると、トラックエラであると想定し、記録を中断し、正
しく記録すべきトラックを見つけ出し、ふたたびつづけ
て書き込むようにしたものであ40この時に中断中に相
当すえデーターのバッファメモリーをもうけておき、こ
の時に消費し次メモリtv回復すべく、記録レートおよ
び、ディスクの回転金早め何んどもエラが発生しても記
atつづけられえようにしたものであと。When rewriting data like this, external photography is added and track skipping occurs, resulting in the same data as the grass and the original correct buttock data being recorded again, especially if the same data is recorded again on the previous track. In case A, it is important to avoid losing correct data.In addition, if the two data to be recorded are continuous like an audio signal, and to reduce the loss of sectors, it is possible to record a pre-group with only track error signals at 71c. Such a thing is common, and if the track error mentioned above occurs, the disk is replaced and the recording is re-recorded. [Means and effects for solving the problem] The present invention has been made in view of the above-mentioned arrangement, and even when recording data such as audio signal information, it is necessary to operate the track data in parallel. The purpose of the present invention is to provide a four-optical disc device that can record continuously without fear of damaging the disc.For this purpose, the present invention monitors track errors during recording, detects noise at this time, and detects when the noise exceeds a certain level. When this occurs, it is assumed that a track error has occurred, and recording is interrupted, the track to be recorded correctly is found, and writing is continued again.40At this time, a buffer memory is created for the data corresponding to the interruption. In order to recover the memory consumed at this time, the recording rate and disk rotational speed are increased so that recording can continue even if errors occur many times.
以下不発明の一実施例全第1崗乃至第3図について畔記
す石。第1図に本発明の元ディスク装置の系統図を示す
、第1図に於いて記録、再生可能な元ヘッド1より信号
検出回路2に再生信号等の信号2人力し、再生信号や)
(F信号更にサーボの為のエラー信号等金取り出す。こ
れら検出信号のうちトラックエラー信号a及びHF信号
by導出してトラックエラー検出回路3にトラックエラ
ー信号avi−加え、HF信号bりeHF信号検出回路
5に加え石。トラックエラー検出回路ではトラックエラ
ー信号aが所定以上の場合にトラックエラー検出回wr
2の出力には検出々力Cが出力される。The following describes an embodiment of the invention in Figures 1 to 3. FIG. 1 shows a system diagram of the original disk device of the present invention. In FIG.
(The F signal and the error signals for the servo are taken out. Of these detection signals, the track error signal a and the HF signal by are derived and added to the track error detection circuit 3, where the track error signal avi- is added, and the HF signal b eHF signal is detected. In addition to circuit 5, the track error detection circuit detects the track error detection circuit wr when the track error signal a is higher than a predetermined value.
The detection power C is output as the output of 2.
上記トラックエラー検出回路の具体的回路49成金第2
図(イ)に示す。第2図(イ)でトラックエラー信号a
會つンドコンパレータ3−1に加え芝。該ランドコンパ
レータでは士の基準電圧+REF、−REFが加えられ
ていて、これらの基準電圧以上のトラックエラー信号a
が取り出され40即ち、第3図←)の囚に示す様にトラ
ックエラー信号aが士の基準電圧出REFt−スレーシ
ョルドレベルとしてこれらの基準電圧以上のパルスa′
が第3図(ロ)の03)K示す様にウィンドコンパレー
タ3−1から取シ出されえ。この電圧パルスa′は積分
検出回路3−2で積分されて第2図(ロ)の(Qで示す
様に検出々力Cが取シ出され4oここで基準電圧は、光
ビームがトラック方向に移動した場合のトラックエラー
信号の最大レベルよシ小さくしておけば良い。Detailed circuit of the above track error detection circuit 49 No. 2
Shown in Figure (a). In Figure 2 (a), the track error signal a
Shiba in addition to the comparator 3-1. In this land comparator, two reference voltages +REF and -REF are added, and a track error signal a higher than these reference voltages is detected.
40, that is, as shown in Fig. 3←), the track error signal a is the reference voltage output REFt-threshold level, and the pulse a' is higher than these reference voltages.
can be taken out from the window comparator 3-1 as shown at 03)K in FIG. 3(b). This voltage pulse a' is integrated by an integral detection circuit 3-2, and a detection force C is taken out as shown by Q in FIG. The maximum level of the track error signal may be set lower than the maximum level of the track error signal when moving to
こfigよって、外部振動によって、トラックを外7′
1次場合でも直ぐにトラックエラーを検出しう4゜又積
分検出回路3−2はなくても良いがこの回路を置くこと
で特に短いパルス性のノイズなどを検(1)せず更にビ
ームの想定移動速度以上の早い信号をのぞき、S/Nt
−改善すこことが出来る。この様なトラックエラー検出
回路を用い芝ことで書キ込み中に検出したトラックエラ
ーがエラーであ4とすZ確率はか7&フ高いものとな2
゜勿論トラックエラーでない場合もち2ので万一に備え
て検出々力Cによって7リツプフロツプ回路4をセット
し記録全停止させとと共に該フリップフロップ回路出力
Qによってトラツクサーチ回路6會作動させて、見失っ
た思われえ記録すべきトラックを探す。According to this figure, the track can be moved 7' by external vibration.
Tracking errors can be detected immediately even in the case of the first order.Although the integral detection circuit 3-2 can be omitted, by installing this circuit, it is possible to avoid detecting particularly short pulse noise (1) and further improve the beam estimation. Except for signals faster than the moving speed, S/Nt
- You can make a lot of improvements. By using such a track error detection circuit, if the track error detected during writing is an error (4), the Z probability will be 7 & 2.
゜Of course, there is a possibility that it is not a track error, so just in case, I set the 7 flip-flop circuit 4 using the detection power C to completely stop recording, and at the same time activated the track search circuit 6 using the flip-flop circuit output Q. Search for tracks that seem worth recording.
この状態を第3図で説明すふと、先づHF信号検出回路
3によって光ディスクからの情報再生時のHF信号全検
出し、記録済のトラック上に於りて信号を得てこの信号
をトラックサーチ回路6に加え石。第3園で元ディスク
のトラックT1〜T1上をスボツ)SPがP点迄来たと
きに塵埃、外部振動等の影響でトラックエラーを起して
スポット点PユがトラックTsへ飛んだ場合には飛ぶ寸
前でトラックT、への記録は停止され、再生状態となえ
。This state will be explained with reference to FIG. 3. First, the HF signal detection circuit 3 detects all HF signals when reproducing information from the optical disc, obtains signals on recorded tracks, and uses these signals for track search. Circuit 6 plus stone. In the case where spot point P jumps to track Ts due to a track error caused by dust, external vibration, etc. when SP reaches point P in the third garden, spot point P jumps to track Ts. Just before it flies off, recording to track T is stopped and the device is in playback mode.
この時22点が持ち来たされたトラックT、は未記録部
分であえためにHF信号検出回路5からはHF信号が検
出されずトラックサーチ回路6より光ディスクの記録開
始トラック側へ1つのキックパルスを出すと該キックパ
ルスはキック回路7を介して、元ヘッド1のスポットS
P?1)ラック分記録開始トラック側のトラックT4に
戻す。、この状態でも)HF信号検出回路5からのHF
信号がないために次々と1トラック分づつT、→T、と
戻ってスポットSPがP1迄来ふとトラックTLには情
報が記録されていえためにHF信号がHF信号検出回路
5で検出がなされる。こ\で開始側とは反対側に一クキ
ツクパルスを出す様にトラックサーチ回路6がキック回
路7に指示すえことでスポット ′SPのA4がトラッ
クT、の位置に来たとすればこ\でHF信号が再びなく
なるのでこの点が記録を再開すべき点と判断すべきであ
とのでトラックサーチ回路δは上記フリップフロップ回
路4ヘリセツトハルスを出して記録状態に戻してトラッ
クT3への記fjt再開すZo
上述の場合はトラックエラーによってスポットSPは未
記録トラック側に移動した利金説明したがこれが記録し
てあ4側、即ち記録開始側のトラックT1〜T3の方へ
何らかの原因で移動した場合にはHF信号が検出され2
のでHF信号が検出されない位置迄キック回路を作動さ
せてやれば再記録開始トラック位置を検知すえことが出
来芝。At this time, the track T to which the 22 points were brought is an unrecorded part, so the HF signal detection circuit 5 does not detect the HF signal, and the track search circuit 6 sends one kick pulse to the recording start track side of the optical disc. When the kick pulse is output, the kick pulse is sent to the spot S of the original head 1 via the kick circuit 7.
P? 1) Return the rack to track T4 on the recording start track side. , even in this state) HF from the HF signal detection circuit 5
Since there is no signal, the spot SP goes back one track at a time from T, →T, and when the spot SP reaches P1, information is recorded on the track TL and the HF signal is detected by the HF signal detection circuit 5. Ru. At this point, the track search circuit 6 instructs the kick circuit 7 to output one kick pulse to the side opposite to the starting side.If A4 of the spot 'SP comes to the position of the track T, the HF signal will be generated at this point. Since this point disappears again, this point should be judged as the point at which recording should be restarted.Then, the track search circuit δ outputs the heliset pulse of the flip-flop circuit 4 to return to the recording state and resume recording fjt on the track T3.Zo In the above case, the spot SP moved to the unrecorded track side due to a track error. However, if for some reason the spot SP moves to the recorded side, that is, the tracks T1 to T3 on the recording start side, HF signal is detected 2
Therefore, if the kick circuit is operated until the HF signal is not detected, the track position to start re-recording can be detected.
次に記録データ金メモリす4ための構成を第1図に戻し
て説明する。T1は、入力信号が加えられる 一端子で
入力信号は端子T、t−介してエンコーダ8によッテ所
定のフォーマットデータにな2様にエンコードされ40
エンコードされた人力信号はクロックパルス発生器9か
らの同期信号によってバックアメモリ10に書き込まf
i、iA。こ\でバッファメモリ10へのアドレスはラ
イトアドレスカウンタ11によってリング的にデータ入
力され、次バッファメモリ10の読み吊しは一定の位相
が遅れたリードアドレスカウンタ12によって読み出さ
れ乙。上記ライトアドレスカウンタ11とリードアドレ
スカウンタ12の位相を一定に保つ様なPLLt−引算
回路13、電圧制御発掘器14で構成すえ、即ち引算回
路13によってライトアドレスカウンタ11のアドレス
値よりリードアドレスカウンタ12のアドレス値が通常
の状態でわずかに遅れ4様にし、この値を基準として電
圧制御発振器14會作動し1.Aき込まれたデータを直
ちに出力して記録アンプ15に一部して元ヘッド1によ
り元ディスク上に信号を記Oしてい芝。今、先に述べた
トラックエラーによってトラック飛びが生じこれを検出
すれば記録アンプ15は停止させられえと共に電圧制御
発振器14から。り。ツクはゲート回路16−c停止さ
せられ、1リードアドレスカウンタ12は停止状態とな
4oスポツ)SPが元の記録すべきトラック位置に戻る
とゲート回路16が閉じてバッファメモリに貯えられて
いたデータを出力すzOここで続出しのリードアドレス
カウンター12の値はライトアドレスカウンタ11よフ
連れており、電圧制御発掘器14に加わえ電圧が増大す
4゜電圧制御発掘器には積分要素が入れてあり、このた
め徐々に発掘周波数が増大し、バックアメモリ10のリ
ードアドレスカウンタ11及びライトアドレスカウンタ
12はもとの安定状態のカウント差に落ちつく、この時
、電圧制御発振器の出力をディスク回転サーボのリファ
レンス周波数としてカウンター17會介し出力し、これ
に同期してディスクの回転を行なうことにより、記録波
長の変化は発しない。Next, the configuration for the recording data memory 4 will be explained with reference to FIG. 1 again. T1 is one terminal to which an input signal is applied, and the input signal is encoded into predetermined format data in two ways by the encoder 8 through the terminals T and t.
The encoded manual signal is written into the backup memory 10 by a synchronization signal from the clock pulse generator 9.
i, iA. Here, the address to the buffer memory 10 is inputted in a ring manner by the write address counter 11, and the next reading of the buffer memory 10 is read out by the read address counter 12 with a certain phase delay. It consists of a PLLt-subtraction circuit 13 and a voltage control excavator 14 that keep the phases of the write address counter 11 and read address counter 12 constant, that is, the read address is calculated from the address value of the write address counter 11 by the subtraction circuit 13. Under normal conditions, the address value of the counter 12 is slightly delayed 4 times, and the voltage controlled oscillator 14 is activated based on this value.1. The written data is immediately outputted, a portion of which is sent to the recording amplifier 15, and a signal is recorded on the original disk by the original head 1. Now, if a track jump occurs due to the above-mentioned track error and this is detected, the recording amplifier 15 is stopped and the voltage controlled oscillator 14 is activated. the law of nature. When SP returns to the original track position to be recorded, the gate circuit 16-c is closed and the data stored in the buffer memory is stopped. The value of the successive read address counter 12 is the same as that of the write address counter 11, and is applied to the voltage control excavator 14, and the voltage increases. Therefore, the excavation frequency gradually increases, and the read address counter 11 and write address counter 12 of the backup memory 10 settle to the original stable state count difference. At this time, the output of the voltage controlled oscillator is applied to the disk rotation servo. By outputting this as a reference frequency through the counter 17 and rotating the disk in synchronization with this, no change in the recording wavelength occurs.
不発明は叙上の如く構成したので記録中の外部振動等で
トラックはずれなどのエラーを起しても、連続的にデー
タを記録し得る、再生の場合には、記録データ中のアド
レス番号などを読み出し、詫碌中エラー金発生した部分
で入力デー・ターが一時中断ずとが、読み出しにもメモ
リーをもうけ、連続したデーターとして、、7tみ出せ
芝。勿論再生中にトラック飛びを起しても所定アドレス
をサーチすえことで容易に連続化でき40
以上説明のように書込中に何んどエラーを発生してもメ
モリーは大きいものが必要としない。しかし、一度のエ
ラーでもとのトラ゛ツクへもどこ時間は数m8〜数10
m8程度であり、エラー発生が少いものは電圧制御発振
614などのループがなくともよいことは勿論であえ。Since the invention is constructed as described above, even if an error such as a track shift occurs due to external vibrations during recording, data can be continuously recorded, and in the case of playback, the address number in the recorded data etc. The input data is not temporarily interrupted at the part where the error occurred during the processing, but memory is also provided for reading, and 7 tons of continuous data can be output. Of course, even if a track jump occurs during playback, it can be easily continued by searching for a predetermined address.40 As explained above, even if many errors occur during writing, a large memory is not required. . However, with one error, it takes several meters to several tens of meters to get back to the original track.
It goes without saying that a loop such as the voltage controlled oscillation 614 may be omitted if the number of errors is about m8 and the occurrence of errors is small.
第1□□□は不発明の系統図、第2陶(イ)(ロ)はト
ラックエラー検出回路並にその波形説明図、第3図は所
定トラックヘスボッ)k戻すための元ディスクの一部平
面図であえ。
1・・0元ヘッド 20・信号検出回路3φ・・トラッ
クエラー検出回路
4・・−フリップフロップ回路
5・・・HF信号検出回路 60・トラックサーチ回
路 70・キック回路 8110・エンコーター9・・
・クロックパルス発生器 10・11@バツフアメモリ
11・・・ライトアドレスカウンタ12−−−リード
アドレスカウンタ
14・・11電圧i+fli御発振器 15・−・記祿
アンプ16・・・ゲート回路 17・・・カウンター第
1図Part 1 □□□ is a system diagram of the uninvented system, Part 2 (a) and (b) are track error detection circuits and their waveform explanatory diagrams, and Fig. 3 is a diagram of the original disk to be returned to a predetermined track. Partial plan view. 1...0 source head 20.Signal detection circuit 3φ...Track error detection circuit 4...-Flip-flop circuit 5...HF signal detection circuit 60.Track search circuit 70.Kick circuit 8110.Encoder 9..
・Clock pulse generator 10・11@Buffer memory 11...Write address counter 12---Read address counter 14...11 Voltage i+fli control oscillator 15...Recording amplifier 16...Gate circuit 17...Counter Figure 1
Claims (2)
、記録データ用のバッハアメモリを有し記録中に記録エ
ラーを生じた場合に記録データを中断し、エラー復帰後
に続けて記録を続行する様にしてなることを特徴とする
光ディスク装置。(1) An optical disk device that records continuous signals has a buffer memory for recording data, and if a recording error occurs during recording, the recording data is interrupted, and recording continues after the error is recovered. An optical disc device characterized in that the optical disk device is configured to operate in a manner similar to that described above.
モリ量を回復する様に記録速度を増大させる様にしてな
ることを特徴とする特許請求の範囲第1項記載の光ディ
スク装置。(2) The optical disc device according to claim 1, wherein the recording speed is increased so as to recover the buffer memory amount consumed when the recording data is interrupted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26130784A JPS61139984A (en) | 1984-12-11 | 1984-12-11 | Optical disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26130784A JPS61139984A (en) | 1984-12-11 | 1984-12-11 | Optical disk device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61139984A true JPS61139984A (en) | 1986-06-27 |
Family
ID=17359970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26130784A Pending JPS61139984A (en) | 1984-12-11 | 1984-12-11 | Optical disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61139984A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0260722A2 (en) * | 1986-09-19 | 1988-03-23 | Kabushiki Kaisha Toshiba | Erroneous track jump restoration apparatus for optical record disc player |
WO1989005509A1 (en) * | 1987-11-30 | 1989-06-15 | Sony Corporation | Disk recording apparatus |
JPH056618A (en) * | 1991-06-28 | 1993-01-14 | Sanyo Electric Co Ltd | Skip recording or reproducing circuit |
EP0523985A2 (en) * | 1991-07-16 | 1993-01-20 | Sony Corporation | Disc recording apparatus |
EP1102257A2 (en) * | 1999-11-22 | 2001-05-23 | Sanyo Electric Co., Ltd. | Controller for data recorder to prevent buffer underrun errors |
EP1102262A2 (en) * | 1999-11-22 | 2001-05-23 | Sanyo Electric Co., Ltd. | Controller for data recorder to prevent buffer underrun errors |
EP1102259A2 (en) * | 1999-11-22 | 2001-05-23 | Sanyo Electric Co., Ltd. | Data recorder capable to prevent buffer underrun errors |
EP1102261A2 (en) * | 1999-11-22 | 2001-05-23 | Sanyo Electric Co., Ltd. | Data recorder capable to prevent buffer underrun errors |
EP1102258A2 (en) * | 1999-11-22 | 2001-05-23 | Sanyo Electric Co., Ltd. | Controller for data recorder to prevent buffer underrun errors |
EP1102260A2 (en) * | 1999-11-22 | 2001-05-23 | Sanyo Electric Co., Ltd. | Data recorder capable to prevent buffer underrun errors |
WO2003007294A1 (en) * | 2001-07-09 | 2003-01-23 | Koninklijke Philips Electronics N.V. | Write control method |
US6603719B1 (en) | 1999-07-20 | 2003-08-05 | Tung-Ke Wu | Speed control of optical information reproducing apparatus based on storage quantity of a buffer memory during access operation |
KR100517492B1 (en) * | 1998-06-17 | 2005-11-25 | 삼성전자주식회사 | Error Correction Method and Device for Deviation of Track in DVD-RAM Drive |
EP1686583A3 (en) * | 2000-12-26 | 2008-01-23 | Pioneer Corporation | Information recording/reproducing apparatus, and information recording medium |
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JPS57143740A (en) * | 1981-02-27 | 1982-09-06 | Fujitsu Ltd | Recording and reproducing control system of disk |
JPS57147141A (en) * | 1981-03-04 | 1982-09-10 | Matsushita Electric Ind Co Ltd | Optical type recorder and reproducer |
JPS57167142A (en) * | 1981-04-09 | 1982-10-14 | Mitsubishi Electric Corp | Optical recording and reproducing device |
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Cited By (32)
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EP0260722A2 (en) * | 1986-09-19 | 1988-03-23 | Kabushiki Kaisha Toshiba | Erroneous track jump restoration apparatus for optical record disc player |
WO1989005509A1 (en) * | 1987-11-30 | 1989-06-15 | Sony Corporation | Disk recording apparatus |
US5099464A (en) * | 1987-11-30 | 1992-03-24 | Sony Corporation | Magneto optical disk recording apparatus including a plurality of connected recording unit buffer memories |
JPH056618A (en) * | 1991-06-28 | 1993-01-14 | Sanyo Electric Co Ltd | Skip recording or reproducing circuit |
EP0523985A2 (en) * | 1991-07-16 | 1993-01-20 | Sony Corporation | Disc recording apparatus |
US5291467A (en) * | 1991-07-16 | 1994-03-01 | Sony Corporation | Disc recording apparatus for recording a signal without losing the signal during an occurrence of a track jump |
KR100517492B1 (en) * | 1998-06-17 | 2005-11-25 | 삼성전자주식회사 | Error Correction Method and Device for Deviation of Track in DVD-RAM Drive |
US6603719B1 (en) | 1999-07-20 | 2003-08-05 | Tung-Ke Wu | Speed control of optical information reproducing apparatus based on storage quantity of a buffer memory during access operation |
EP1102261A3 (en) * | 1999-11-22 | 2006-11-15 | Sanyo Electric Co., Ltd. | Data recorder capable to prevent buffer underrun errors |
EP1102259A3 (en) * | 1999-11-22 | 2006-11-15 | Sanyo Electric Co., Ltd. | Data recorder capable to prevent buffer underrun errors |
EP1102258A2 (en) * | 1999-11-22 | 2001-05-23 | Sanyo Electric Co., Ltd. | Controller for data recorder to prevent buffer underrun errors |
EP1102260A2 (en) * | 1999-11-22 | 2001-05-23 | Sanyo Electric Co., Ltd. | Data recorder capable to prevent buffer underrun errors |
US7196987B1 (en) | 1999-11-22 | 2007-03-27 | Sanyo Electric Co., Ltd. | Controller for data recorder |
EP1102259A2 (en) * | 1999-11-22 | 2001-05-23 | Sanyo Electric Co., Ltd. | Data recorder capable to prevent buffer underrun errors |
EP1102262A2 (en) * | 1999-11-22 | 2001-05-23 | Sanyo Electric Co., Ltd. | Controller for data recorder to prevent buffer underrun errors |
EP1102260A3 (en) * | 1999-11-22 | 2006-11-15 | Sanyo Electric Co., Ltd. | Data recorder capable to prevent buffer underrun errors |
EP1102257A2 (en) * | 1999-11-22 | 2001-05-23 | Sanyo Electric Co., Ltd. | Controller for data recorder to prevent buffer underrun errors |
EP1102257A3 (en) * | 1999-11-22 | 2006-11-15 | Sanyo Electric Co., Ltd. | Controller for data recorder to prevent buffer underrun errors |
EP1102258A3 (en) * | 1999-11-22 | 2006-11-15 | Sanyo Electric Co., Ltd. | Controller for data recorder to prevent buffer underrun errors |
EP1102261A2 (en) * | 1999-11-22 | 2001-05-23 | Sanyo Electric Co., Ltd. | Data recorder capable to prevent buffer underrun errors |
EP1102262A3 (en) * | 1999-11-22 | 2006-11-15 | Sanyo Electric Co., Ltd. | Controller for data recorder to prevent buffer underrun errors |
EP1686583A3 (en) * | 2000-12-26 | 2008-01-23 | Pioneer Corporation | Information recording/reproducing apparatus, and information recording medium |
US7404135B2 (en) | 2000-12-26 | 2008-07-22 | Pioneer Corporation | Information recording/reproducing apparatus, and information recording medium |
US7415650B2 (en) | 2000-12-26 | 2008-08-19 | Pioneer Corporation | Information recording/reproducing apparatus, and information recording medium |
US7480849B2 (en) | 2000-12-26 | 2009-01-20 | Pioneer Corporation | Information recording/reproducing apparatus, and information recording medium |
US7484163B2 (en) | 2000-12-26 | 2009-01-27 | Pioneer Corporation | Information recording/reproducing apparatus, and information recording medium |
US7484164B2 (en) | 2000-12-26 | 2009-01-27 | Pioneer Corporation | Information recording/reproducing apparatus, and information recording medium |
US7512866B2 (en) | 2000-12-26 | 2009-03-31 | Pioneer Corporation | Information recording/reproducing apparatus, and information recording medium |
US8020076B2 (en) | 2000-12-26 | 2011-09-13 | Pioneer Corporation | Information recording/reproducing apparatus, and information recording medium |
US8190978B2 (en) | 2000-12-26 | 2012-05-29 | Pioneer Corporation | Information recording/reproducing apparatus, and information recording medium |
WO2003007294A1 (en) * | 2001-07-09 | 2003-01-23 | Koninklijke Philips Electronics N.V. | Write control method |
US7349296B2 (en) * | 2001-07-09 | 2008-03-25 | Koninklijke Philips Electronics N.V. | Write control in response to tracking error |
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