JP2004145953A

JP2004145953A - Information recording device, information recording method, program and recording medium

Info

Publication number: JP2004145953A
Application number: JP2002308588A
Authority: JP
Inventors: Atsushi Okada; 岡田　敦
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 2002-10-23
Filing date: 2002-10-23
Publication date: 2004-05-20

Abstract

<P>PROBLEM TO BE SOLVED: To increase the probability of correctly recording data by unnecessitating an alteration processing when the data is recorded on a recording medium. <P>SOLUTION: After initial value setting (S1), a CPU records/reproduces data in a recoding area specified as the recording side of an optical disk by setting a head recording pulse width to a default value D0 (S2, S3), updates the number of retrial recording times to add α to the head recording pulse width D of data recorded immediately before (S5, S7, S8) if there is a recording error (S4) and the number S of retrial recording times is less than the maximum number XMAX of retrial recording times, and then exectues retrial recording. Such retrial recording of an enlarged head recording pulse width is repeated, and the alteration processing is carried out to record data in an alteration area set in an optical disk (S6) if the number X of retrial recording times is equal to/higher than the predetermined number XMAX of times (S5). <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、ＣＤ−Ｒ／ＲＷドライブ，ＤＶＤ−Ｒ／ＲＷドライブ，ＤＶＤ＋Ｒ／ＲＷドライブ，ＤＶＤ−ＲＡＭドライブ，ＤＶＤ＋ＲＡＭドライブ等のレーザ光を用いて書き換え可能な記録媒体にデータを繰り返し記録する情報記録装置とその情報記録方法とプログラムとそのプログラムを記録したコンピュータ読み取り可能な記録媒体とに関する。
【０００２】
【従来の技術】
光ディスク（記録媒体）にデータを記録する光学情報記録再生装置等の情報記録装置において、記録したデータを再生し、データ内に付加されている誤り訂正コードを用いてもそのデータが正しいデータに訂正できない記録エラーが存在した場合、光ディスク内に設けられた交替領域に上記データを記録する交替処理を行うシステムが導入されているものがある。そのようなシステムによれば、光ディスクにデータを正しく記録することができ、光ディスクに記録したデータの信頼性を高めることができる。
しかし、上述のような交替処理を行った場合、データは本来の記録領域と交替領域にまたがって記録されてしまうので、データ再生時にはデータの読み込みに時間がかかるという問題があった。
【０００３】
光ディスクの中でもデータの書き換え可能な光ディスク（記録媒体）の場合、その光ディスクに対するデータの記録再生を行う光ディスク装置では、光ディスクの記録領域にデータを記録した後に再生し、その再生したデータに基づいて記録エラーが発生した場合、同じ記録領域に再度記録を行うデータの再記録（リトライ記録）を行うのが一般的である。
そして、数回のリトライ記録を行っても記録エラーが発生すれば、データの書き換え可能な光ディスクに設けられた交替領域に書き込む交替処理へ移行する。
【０００４】
このようなデータの書き換え可能な光ディスクでは、リトライ記録によってデータを正しく記録できれば、交替領域を用いることなく連続した記録領域にデータを格納することができ、データの読み込みに時間がかかるという問題を解消することができる。そのためにもリトライ記録によってデータが正しく記録できる確率を高める必要がある。
【０００５】
従来のデータの書き換え可能な光ディスクにデータを記録する情報記録装置は、光ディスクにデータを記録した後にそのデータを再生し、その再生データのエラーレートを測定し、そのエラーレートが基準値を越えた場合、データ再記録（リトライ記録）時にデフォルト値よりも大きい記録パワーで記録することにより、リトライ記録によってデータが正しく記録できる確率を高めている（例えば、特許文献１参照）。
【０００６】
【特許文献１】
特開平１１−１５４３３０号公報
【０００７】
【発明が解決しようとする課題】
しかしながら、上述した従来の情報記録装置では、リトライ記録時に記録パワーを大きくしていくと、レーザ光を照射するピックアップ装置の寿命を縮め、記録媒体の記録面を劣化させてしまうので、記録パワーの上限値が決められており、データが正しく記録されるまで無制限に記録パワーを大きくしてリトライ記録をすることができず、データを正しく記録できる確率が高まらないという問題があった。
【０００８】
この発明は上記の課題を解決するためになされたものであり、記録媒体へのデータ記録の際の交替処理を行わないようにしてデータが正しく記録できる確率を高めることを目的とする。
【０００９】
【課題を解決するための手段】
この発明は上記の目的を達成するため、次の（１）〜（５）の情報記録装置を提供する。
（１）データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手段と、その記録手段によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する判断手段と、その判断手段によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う再記録手段と、その再記録手段によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手段を備えた情報記録装置。
【００１０】
（２）上記（１）の情報記録装置において、上記再生したデータについて誤り訂正コードを用いても正しく訂正できなかったデータの数に基づいて上記記録領域に対してデータを正しく記録できるか否かを判断する手段と、その手段によって上記記録領域に対してデータを正しく記録できると判断したときには上記再記録手段によるデータの再記録を繰り返すようにし、上記記録領域に対してデータを正しく記録できないと判断したときには上記交替記録手段によって上記交替領域に上記データを記録するようにした情報記録装置。
（３）上記（１）又は（２）の情報記録装置において、上記所定回数再記録するとき、その所定回数内の予め設定した回数後は前記パルス幅の異ならせる量を変更するようにした情報記録装置。
（４）上記（１）又は（２）の情報記録装置において、前回の記録時に行った再記録回数が所定回数以上のとき、上記記録手段によって記録するデータの記録パルス幅のうちの先頭記録パルス幅を初期値とは異なるパルス幅で上記データを記録するようにした情報記録装置。
【００１１】
（５）データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手段と、その記録手段によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する判断手段と、その判断手段によって正しく記録できなかったと判断したとき、上記レーザ光の記録パワーを直前に記録したときの記録パワーよりも大きいパワーにして上記データを上記記録領域に再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う第１の再記録手段と、その第１の再記録手段によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う第２の再記録手段と、その第２の再記録手段によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手段を備えた情報記録装置。
【００１２】
また、次の（６）と（７）の情報記録方法も提供する。
（６）データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録し、その記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行い、その所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する情報記録方法。
【００１３】
（７）データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録し、その記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったとき、上記レーザ光の記録パワーを直前に記録したときの記録パワーよりも大きいパワーにして上記データを上記記録領域に再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行い、その所定回数再記録しても正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行い、その所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する情報記録方法。
【００１４】
さらに、次の（８）と（９）のプログラムも提供する。
（８）コンピュータに、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手順と、その記録手順によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する判断手順と、その判断手順によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う再記録手順と、その再記録手順によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手順とを実行させるためのプログラム。
【００１５】
（９）コンピュータに、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手順と、その記録手順によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する判断手順と、その判断手順によって正しく記録できなかったと判断したとき、上記レーザ光の記録パワーを直前に記録したときの記録パワーよりも大きいパワーにして上記データを上記記録領域に再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う第１の再記録手順と、その第１の再記録手順によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う第２の再記録手順と、その第２の再記録手順によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手順とを実行させるためのプログラム。
【００１６】
また、次の（１０）〜（１３）の各情報記録装置も提供する。
（１０）データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手段と、その記録手段によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する第１の判断手段と、その第１の判断手段によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータの誤り訂正コードを用いても正しく訂正できなかったデータ数が直前に記録したときの正しく訂正できなかったデータ数よりも増えたか否かに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う再記録手段と、その再記録手段によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手段と、上記再記録手段による再記録のときに上記再生したデータについて誤り訂正コードを用いても正しく訂正できなかったデータの数に基づいて上記再記録手段によるデータの再記録を繰り返すか上記交替記録手段によって上記交替領域に上記データを記録するかを判断する第２の判断手段と、その第２の判断手段の判断結果に基づいて上記再記録手段によるデータの再記録を繰り返すか上記交替記録手段によって上記交替領域に上記データを記録するかを切り換える手段を備えた情報記録装置。
【００１７】
（１１）データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手段と、その記録手段によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する判断手段と、その判断手段によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う再記録手段と、その再記録手段によって所定回数再記録して正しく記録できたデータの先頭記録パルス幅のうちの最大値である最大先頭記録パルス幅を記憶する最大先頭記録パルス幅記憶手段と、次に上記記録手段によってデータの書き換えが可能な記録媒体の記録領域にデータを記録したとき、その記録したデータを再生し、その再生したデータに基づいて上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったと判断したとき、上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録する動作を所定回数行い、その所定回数の動作を行う内に上記再記録するデータの先頭記録パルス幅が上記最大先頭記録パルス幅記憶手段に記憶された最大先頭記録パルス幅以上になったとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手段を備えた情報記録装置。
【００１８】
（１２）上記（１１）の情報記録装置において、上記最大先頭記録パルス幅と共に、その時の記録速度及び記録媒体の種類とを記憶し、自装置の電源遮断後あるいはリセット後も保持し続ける手段を設けた情報記録装置。
（１３）上記（１１）の情報記録装置において、自装置の電源遮断後あるいはリセット後、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録し、その記録したデータを再生し、その再生したデータに基づいて上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったと判断したとき、上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録する動作を所定回数行い、その所定回数の動作を行う内に上記再記録するデータの先頭記録パルス幅が上記最大先頭記録パルス幅記憶手段に記憶された最大先頭記録パルス幅以上になったとき、上記記録媒体内に設けられた交替領域に上記データを記録する手段を設けた情報記録装置。
【００１９】
さらに、次の（１４）と（１５）の情報記録方法も提供する。
（１４）データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録し、その記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータの誤り訂正コードを用いても正しく訂正できなかったデータ数が直前に記録したときの正しく訂正できなかったデータ数よりも増えたか否かに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行い、その所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録し、上記再記録のときに上記再生したデータについて誤り訂正コードを用いても正しく訂正できなかったデータの数に基づいて上記データの再記録を繰り返すか上記交替領域に上記データを記録するかを判断し、その判断結果に基づいて上記データの再記録を繰り返すか上記交替領域に上記データを記録するかを切り換える情報記録方法。
【００２０】
（１５）データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録し、その記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行い、その所定回数再記録して正しく記録できたデータの先頭記録パルス幅のうちの最大値である最大先頭記録パルス幅を記憶し、次にデータの書き換えが可能な記録媒体の記録領域にデータを記録したとき、その記録したデータを再生し、その再生したデータに基づいて上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったと判断したとき、上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録する動作を所定回数行い、その所定回数の動作を行う内に上記再記録するデータの先頭記録パルス幅が上記記憶された最大先頭記録パルス幅以上になったとき、上記記録媒体内に設けられた交替領域に上記データを記録する情報記録方法。
【００２１】
また、次の（１６）と（１７）のプログラムも提供する。
（１６）コンピュータに、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手順と、その記録手順によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する第１の判断手順と、その第１の判断手順によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータの誤り訂正コードを用いても正しく訂正できなかったデータ数が直前に記録したときの正しく訂正できなかったデータ数よりも増えたか否かに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う再記録手順と、その再記録手順によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手順と、上記再記録手順による再記録のときに上記再生したデータについて誤り訂正コードを用いても正しく訂正できなかったデータの数に基づいて上記再記録手順によるデータの再記録を繰り返すか上記交替記録手順によって上記交替領域に上記データを記録するかを判断する第２の判断手順と、その第２の判断手順の判断結果に基づいて上記再記録手順によるデータの再記録を繰り返すか上記交替記録手順によって上記交替領域に上記データを記録するかを切り換える手順とを実行させるためのプログラム。
【００２２】
（１７）コンピュータに、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手順と、その記録手順によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する判断手順と、その判断手順によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う再記録手順と、その再記録手順によって所定回数再記録して正しく記録できたデータの先頭記録パルス幅のうちの最大値である最大先頭記録パルス幅を記憶する最大先頭記録パルス幅記憶手順と、次に上記記録手順によってデータの書き換えが可能な記録媒体の記録領域にデータを記録したとき、その記録したデータを再生し、その再生したデータに基づいて上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったと判断したとき、上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録する動作を所定回数行い、その所定回数の動作を行う内に上記再記録するデータの先頭記録パルス幅が上記最大先頭記録パルス幅記憶手順によって記憶された最大先頭記録パルス幅以上になったとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手順とを実行させるためのプログラム。
【００２３】
さらに、次の（１８）の記録媒体も提供する。
（１８）上記（８）と（９）と（１６）と（１７）のいずれかのプログラムを記録したコンピュータ読み取り可能な記録媒体。
【００２４】
【発明の実施の形態】
以下、この発明の実施形態を図面に基づいて具体的に説明する。
図１は、この発明の一実施形態である光ディスク装置の構成を示すブロック図である。
なお、この発明を適用する光ディスクに対してデータを記録再生する光ディスク装置としては、この実施形態の光ディスク装置の他に、データの書き換えが可能な記録媒体であれば光ディスクに限らず、光磁気ディスクなどの光記録媒体に対してデータを記録再生する装置にも適応することができる。
【００２５】
この光ディスク装置（光ディスクドライブ）は、スピンドルモータ２，光ピックアップ３，モータドライバ４，レーザコントローラ５，リードアンプ（ＲＦアンプ）６，ＣＤエンコーダ７，ＣＤデコーダ８，サーボ部９，ＣＤ−ＲＯＭエンコーダ１０，バッファＲＡＭ（バッファメモリ）１１，ＣＤ−ＲＯＭデコーダ１２，バッファマネージャ１３，ＲＯＭ１４，ＣＰＵ１５，ＲＡＭ１６からなる。
同図中に示す矢印付き線は各部（各ブロック）間においてデータが主に流れる方向を示しており、また、図を簡略化するために、各部を制御するＣＰＵ１５には、矢印付き太線のみを記し、各ブロックとの接続の図示を省略している。
ＲＯＭ１４には、ＣＰＵ１５で解読可能なコードで記述された制御プログラムが格納されている。光ディスク装置の電源がオン状態になると、ＲＯＭ１４内の制御プログラムを図示を省略した公知のメインメモリにロードし、ＣＰＵ１５はその制御プログラムに従って上記各部の動作を制御すると共に、その制御に必要なデータ等を一時的にＲＡＭ１６に保存する。
【００２６】
次に、この光ディスク装置の基本的な動作の概要について説明する。
この光ディスク装置は、ＲＡＭ１６に光ディスク１に記録するデータの記録パルス幅の情報を保存し、その記録パルス幅の情報を変更してこの発明に係る再記録動作（リトライ記録動作）を行うことを特徴とする。
この光ディスク装置は、スピンドルモータ２がＣＤ−ＲＷディスク，ＤＶＤ−ＲＷディスク，ＤＶＤ＋ＲＷディスク，ＤＶＤ−ＲＡＭディスク，ＤＶＤ＋ＲＡＭディスク等のレーザ光を用いて書き換え可能な記録媒体光であるディスク１を回転駆動する。モータドライバ４とサーボ部９は、スピンドルモータ２を線速度一定もしくは回転速度一定になるように制御する。
【００２７】
光ピックアップ３は、図示を省略した公知の半導体レーザ光源，光学系部，フォーカスアクチュエータ，トラックアクチュエータ，受光素子及びポジションセンサを内蔵しており、レーザ光Ｌを光ディスク１に照射する。また、この光ピックアップ３は、モータドライバ４とサーボ部９により、レーザ光Ｌのスポットが光ディスク１上の目的の場所（記録する箇所）に位置するように制御される。
【００２８】
そして、光ディスク１に記録されたデータの再生（リード）時には、ＲＦアンプ６が光ピックアップ３によって得られた再生信号を増幅して２値化した後、ＣＤデコーダ８に入力する。このＣＤデコーダ８は、ＲＦアンプ６から入力された２値化データをＥＦＭ（Ｅｉｇｈｔ　ｔｏ　Ｆｏｕｒｔｅｅｎ　Ｍｏｄｕｌａｔｉｏｎ）復調してＣＤ−ＲＯＭデコーダ１２へ出力する。ＣＤ−ＲＯＭデコーダ１２はＣＤデコーダ８で復調されたデータに誤り訂正の処理を行い、バッファマネージャ１３がその誤り訂正の処理が行われたデータを一旦バッファＲＡＭ１１に蓄える。
【００２９】
また、光ディスク１へのデータの記録（ライト）時には、図示を省略したＡＴＡＰＩ／ＳＣＳＩインタフェースを通してホストコンピュータから送られてきたデータをバッファマネージャ１３によって一旦バッファＲＡＭ１１に蓄える。そして、バッファＲＡＭ１１内にある程度の量のデータが蓄積された状態で、ライト動作を開始する。そのライト動作は、ＣＤ−ＲＯＭエンコーダ１０やＣＤエンコーダ７において、バッファＲＡＭ１１のデータに誤り訂正コードを付加し、レーザコントローラ５，光ピックアップ３を介して光ディスク１にデータを記録する。
【００３０】
図２は、データの書き換えが可能な光ディスク１におけるデータの記録パルス幅の形状の一例を示す波形図である。
データの記録パルスは一つの記録パルス幅Ｄ１の先頭パルスと一つもしくは複数の記録パルス幅Ｄ２の中間パルス（同図には３個の場合を示す）から形成されている。一方、記録パワーレベルはＰｒとＰ１とＰ２の３種類を有する。
この光ディスク装置では、光ディスク１にデータを記録するとき、そのデータの先頭パルスの記録パルス幅を通常よりは広くすることにより、オーバーライトの品質を向上させるものである。
【００３１】
（１）この光ディスク装置におけるこの発明に係る第１の記録機能
この第１の記録機能を実現するため、光ディスク装置のＣＰＵ１５のＲＯＭ１４又はＲＡＭ１６に、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手順と、その記録手順によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する判断手順と、その判断手順によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う再記録手順と、その再記録手順によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手順とを実行させるためのプログラムをインストール（ＣＰＵが実行可能に格納）する。
【００３２】
そして、ＣＰＵ１５がそのプログラムを実行することにより、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録し、その記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行い、その所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する記録処理を行う。
【００３３】
すなわち、上記ＣＰＵ１５等が、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手段と、その記録手段によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する判断手段と、その判断手段によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う再記録手段と、その再記録手段によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手段の機能を果たす。
【００３４】
次に、この第１の記録機能の動作を図３に示すフローチャート図に基づいて説明する。
図３は、この光ディスク装置における第１の記録処理を示すフローチャート図である。
この第１の記録処理は、ＣＰＵ１５が、ステップ（図中「Ｓ」で示す）１で初期値を設定する。その初期値の設定では、データを正しく記録できなかったときの再記録回数をカウントするための初期値としてリトライ記録回数（再記録回数）Ｘ＝０にし、データの再記録（リトライ記録）のときに先頭記録パルス幅Ｄを直前に記録したときとは異ならせるためのデフォルト値（初期値）Ｄ０にする。
ステップ２で光ピックアップから光ディスクにレーザ光を照射することにより、まず、光ディスクの記録先として指定された記録領域に先頭記録パルス幅Ｄをデフォルト値Ｄ０にしてデータを記録する。
【００３５】
次に、ステップ３でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅Ｄをデフォルト値Ｄ０でデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ４で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
ステップ４で記録エラー無しでデータが正しく記録されていると判断した場合、すなわち、誤り訂正の必要がない場合、もしくは誤り訂正によって全てのデータが正しく訂正できた場合はデータが正しく記録されているとしてデータ記録終了もしくは次のデータの記録を続ける。
【００３６】
一方、ステップ４の判断で記録エラー有りでデータが正しく記録できなかったと判断した場合、すなわち、データが誤り訂正コードを用いても正しく訂正できないデータがあった場合はデータが正しく記録できなかったとして、ステップ５でリトライ記録回数Ｘが予め設定した所定回数（最大リトライ記録回数）ＸＭＡＸ以上になったか否かを判断する。
【００３７】
ステップ５の判断でリトライ記録回数Ｘが予め設定した所定回数ＸＭＡＸ未満なら、ステップ７へ進んでリトライ記録回数Ｘ＝Ｘ＋１でリトライ記録回数に１を加算し、ステップ８で直前に記録したデータの先頭記録パルス幅Ｄに所定記録パルス幅αを加算してリトライ記録するときの先頭記録パルス幅をＤ＋αにし、ステップ２へ戻って光ピックアップから光ディスクにレーザ光を照射することにより、先頭記録パルス幅をＤ＋αでデータをリトライ記録し、ステップ３でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅をＤ＋αでデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ４で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【００３８】
このようにして、ステップ１〜４で最初に光ディスク１の記録先の記録領域に先頭記録パルス幅Ｄをデフォルト値Ｄ０にしたデータを記録し、その記録したデータを再生し、その再生したデータに基づいて記録領域にデータを正しく記録できたか否かを判断する。その判断によって正しく記録できなかったとき、ステップ２〜４とステップ５とステップ７〜８で直前のデータの記録パルス幅のうちの先頭記録パルス幅Ｄに所定の記録パルス幅αを加算して直前に記録したときとは異なるパルス幅にしてデータを再記録し、その再記録したデータを再生し、その再生したデータに基づいて再記録したデータが記録領域に正しく記録できたか否かを判断する動作を所定回数ＸＭＡＸ行う。
【００３９】
つまり、ＲＡＭ１６に保存されている記録パルス幅の情報を変更することによって、直前の記録の際の先頭記録パルス幅Ｄから所定記録パルス幅αだけ広く設定してリトライ記録を行う。リトライ記録をして、そのデータが誤り訂正コードを用いても訂正できない記録エラーが発生しなければ記録終了もしくは次のデータの記録を続け、記録エラーが発生すれば更に先頭記録パルス幅Ｄを所定記録パルス幅αだけ広く設定してリトライ記録を行う。この一連の処理の流れを繰り返し、リトライ記録回数が予め定めた最大記録回数ＸＭＡＸに達すれば交替処理へ移行する。
【００４０】
したがって、リトライ記録の度にデータの先頭記録パルス幅Ｄを所定記録パルス幅αづつ広げて（１回目のリトライ記録では先頭記録パルス幅はデフォルト値Ｄ０＋α，２回目のリトライ記録では先頭記録パルス幅はデフォルト値Ｄ０＋２α，・・・，ｎ回目のリトライ記録では先頭記録パルス幅はデフォルト値Ｄ０＋ｎα（ｎは正の整数））再記録する。
そして、ステップ５の判断でリトライ記録回数Ｘが予め設定した所定回数ＸＭＡＸ以上なら、すなわち、光ディスクの記録先の記録領域に対して所定回数ＸＭＡＸ再記録してもデータを正しく記録できなかったと判断したとき、ステップ６へ進んで光ディスク内に設けられた交替領域にデータを記録する記録処理（交替処理）を行う。
【００４１】
一般に、光ディスク装置において記録エラーが発生する原因はさまざまであるが、その中には、オーバーライトする際に記録パワーが小さいために消し残りが出てしまうといった原因がある。そこで、消し残りを生じさせないためには記録パワーを大きくすることが考えられるが、レーザ光を照射するピックアップ装置の寿命を縮めることから、無制限に記録パワーを大きくすることはできない。
この実施形態の光ディスク装置の第１の記録機能は、リトライ記録時に記録パワーを大きくする代わりに、データの先頭記録パルス幅をデフォルト値よりも広くして記録するので、記録パワーの上限には関係がなく、記録パワーを大きくするのと同等の効果を得られ、リトライ記録によってデータが正しく記録できる確率を高め、光ディスクにデータを正しくオーバーライトすることができる。
【００４２】
（２）この光ディスク装置におけるこの発明に係る第２の記録機能
上述の第１の記録機能において、リトライ記録はデータが正しく記録されるまで数回行われるが、そのリトライ記録回数が多ければ記録時間は長くなる問題がある。記録領域に正しく記録されない欠陥が複数回生じた場合、２回目以降は可能な限りリトライ記録回数を少なくして正しく記録する必要がある。
また、リトライ記録はデータが正しく記録されるまで数回行われるが、そのリトライ記録回数が多ければ記録時間は長くなる問題がある。
正しく記録できない可能性が高いリトライ記録は、記録時間を長める原因となるので、実行しないようにする必要がある。
そこで、第２の記録機能では、リトライ記録回数を少なくしている。
【００４３】
この第２の記録機能を実現するため、上記プログラムに、上記再生したデータについて誤り訂正コードを用いても正しく訂正できなかったデータの数に基づいて上記記録領域に対してデータを正しく記録できるか否かを判断する手順と、その手順によって上記記録領域に対してデータを正しく記録できると判断したときには上記再記録手順によるデータの再記録を繰り返すようにし、上記記録領域に対してデータを正しく記録できないと判断したときには上記交替記録手順によって上記交替領域に上記データを記録するようにする手順とを追加し、上記ＣＰＵ１５等がその手順も実行することにより、第２の記録機能を実現する。
【００４４】
次に、この第２の記録機能の動作を同じく図３に示すフローチャート図に基づいて説明する。
この第２の記録処理は、ＣＰＵ１５が、上述の処理と同様にして上記ステップ５の処理でリトライ記録回数Ｘが予め設定した所定回数（最大リトライ記録回数）ＸＭＡＸ以上になったか否かを判断し、さらに上記再生したデータについて誤り訂正コードを用いても正しく訂正できなかったデータの数に基づいて上記記録領域に対してデータを正しく記録できるか否かも判断する。
【００４５】
このように、上述の交替処理へ移行するか否かの判断において、リトライ記録回数Ｘが予め設定した所定回数（最大リトライ記録回数）ＸＭＡＸ以上になったか否かの判断と、再生したデータについて誤り訂正コードを用いても正しく訂正できないデータ数（記録エラー数）が予め設定した判断基準値以上か否かを判断し、その両判断によってリトライ記録を繰り返すか交替処理に移行するかを判断する。その判断基準値となる記録エラー数は予め一定数に定めておいても良いし、リトライ記録が何回目であるかによって上記記録エラー数を変えるようにしても良い。
例えば、リトライ記録回数が２回以上からは、記録エラーが有り、その記録エラー数が判断基準値未満の場合には先頭記録パルス幅を変えてリトライ記録を繰り返し、記録エラー数が判断基準値以上の時には直ちに交替処理に移行するようにする。
【００４６】
この実施形態の光ディスク装置の第２の記録機能は、再生したデータの誤り訂正コードを用いても正しいデータに訂正できなかった記録エラー数が多いほど、その後、同じ領域に同じデータを記録しても正しく記録できない可能性が高いことに着目し、リトライ記録を繰り返すか交替領域への記録に移行するかを、記録エラー数で判断することによって、正しく記録できないリトライ記録の回数を減らすことができ、記録時間の短縮を実現することができる。
【００４７】
（３）この光ディスク記録装置におけるこの発明に係る第３の記録機能
第３の記録機能では、上述の第２の記録機能とは異なる方法でリトライ記録回数を少なくしている。
この第３の記録機能を実現するため、上記プログラムに、上記所定回数再記録するとき、その所定回数内の予め設定した回数後は上記パルス幅の異ならせる量を変更するようにする手順を追加し、上記ＣＰＵ１５等がその手順も実行することにより、第３の記録機能を実現する。
【００４８】
次に、この第３の記録機能の動作を図４に示すフローチャート図に基づいて説明する。
図４は、この光ディスク記録装置における第３の記録処理を示すフローチャート図である。
この第３の記録処理は、ＣＰＵ１５が、ステップ（図中「Ｓ」で示す）１１で最初のデータの書き込みか否かを判断し、最初のデータの書き込み（最初のデータの記録）でない場合はステップ１３へ進み、最初のデータの書き込みの場合、ステップ１２でデータ記録前にリトライ記録発生回数Ｎを初期値“０”に設定してステップ１３へ進む。このリトライ記録発生回数Ｎは先頭記録パルス幅のパルス幅の異ならせる量を変更するタイミングを判断するためのカウント値である。
【００４９】
ステップ１３で初期値を設定する。その初期値の設定では、データを正しく記録できなかったときの再記録回数をカウントするための初期値としてリトライ記録回数（再記録回数）Ｘ＝０にし、データの再記録（リトライ記録）のときに先頭記録パルス幅Ｄを直前に記録したときとは異ならせるためのデフォルト値（初期値）Ｄ０にする。
ステップ１４で光ピックアップから光ディスクにレーザ光を照射することにより、まず、光ディスクの記録先として指定された記録領域に先頭記録パルス幅Ｄをデフォルト値Ｄ０にしてデータを記録する。
【００５０】
次に、ステップ１５でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅Ｄをデフォルト値Ｄ０でデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ１６で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【００５１】
ステップ１６で記録エラー無しでデータが正しく記録されていると判断した場合、すなわち、誤り訂正の必要がない場合、もしくは誤り訂正によって全てのデータが正しく訂正できた場合はデータが正しく記録されているとしてステップ１７へ進んでリトライ記録回数Ｘ＝０か否かを判断し、リトライ記録回数Ｘ＝０ならデータ記録終了もしくは次のデータの記録を続け、リトライ記録回数Ｘ＝０でなければステップ１８でリトライ記録発生回数Ｎに１を加算してその記録領域におけるリトライ記録発生回数としてＲＡＭ等のメモリに格納し、データ記録終了もしくは次のデータの記録を続ける。その光ディスクの各記録領域におけるリトライ記録発生回数は、その光ディスクの管理領域や空き領域に記録するようにすると良い。そして、次回のオーバーライト時には、光ディスク上からその記録先の記録領域におけるリトライ記録発生回数を読み出してセットしてデータの記録を行う。
【００５２】
一方、ステップ１６の判断で記録エラー有りでデータが正しく記録できなかったと判断した場合、すなわち、データが誤り訂正コードを用いても正しく訂正できないデータがあった場合はデータが正しく記録できなかったとして、ステップ１９でリトライ記録回数Ｘが予め設定した所定回数（最大リトライ記録回数）ＸＭＡＸ以上になったか否かを判断する。
【００５３】
ステップ１９の判断でリトライ記録回数Ｘが予め設定した所定回数ＸＭＡＸ未満なら、ステップ２１へ進んでリトライ記録発生回数Ｎが１０回以上か否かを判断し、１０回以上でなければステップ２３へ進んでリトライ記録回数Ｘ＝Ｘ＋１でリトライ記録回数に１を加算し、ステップ２４で直前に記録したデータの先頭記録パルス幅Ｄに所定記録パルス幅αを加算してリトライ記録するときの先頭記録パルス幅をＤ＋αにし、ステップ１４へ戻って光ピックアップから光ディスクにレーザ光を照射することにより、先頭記録パルス幅をＤ＋αでデータをリトライ記録し、ステップ１５でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅をＤ＋αでデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ１６で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【００５４】
一方、ステップ２１の判断でリトライ記録発生回数Ｎが１０回以上なら、ステップ２２で直前に記録したデータの先頭記録パルス幅Ｄに所定記録パルス幅αを加算し、ステップ２３へ進んでリトライ記録回数Ｘ＝Ｘ＋１でリトライ記録回数に１を加算し、ステップ２４でデータの先頭記録パルス幅Ｄにさらに所定記録パルス幅αを加算してリトライ記録するときの先頭記録パルス幅をＤ＋αにし、ステップ１４へ戻って光ピックアップから光ディスクにレーザ光を照射することにより、先頭記録パルス幅をＤ＋２αでデータをリトライ記録し、ステップ１５でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅をＤ＋２αでデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ１６で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【００５５】
このようにして、ステップ１〜４で最初に光ディスク１の記録先の記録領域に先頭記録パルス幅Ｄをデフォルト値Ｄ０にしたデータを記録し、その記録したデータを再生し、その再生したデータに基づいて記録領域にデータを正しく記録できたか否かを判断する。その判断によって正しく記録できなかったとき、リトライ記録回数が９回目迄はステップ１４〜１６とステップ１９とステップ２１とステップ２３〜２４で直前のデータの記録パルス幅のうちの先頭記録パルス幅Ｄに所定の記録パルス幅αを加算して直前に記録したときとは異なるパルス幅にしてデータを再記録し、その再記録したデータを再生し、その再生したデータに基づいて再記録したデータが記録領域に正しく記録できたか否かを判断する動作を所定回数ＸＭＡＸ行う。
【００５６】
また、リトライ記録回数が１０回目からはステップ１４〜１６とステップ１９とステップ２１〜２４で直前のデータの記録パルス幅のうちの先頭記録パルス幅Ｄに所定の記録パルス幅αを二倍にした２αを加算して直前に記録したときとは異なるパルス幅にしてデータを再記録し、その再記録したデータを再生し、その再生したデータに基づいて再記録したデータが記録領域に正しく記録できたか否かを判断する動作を所定回数ＸＭＡＸ行う。
【００５７】
したがって、１回目〜９回目のリトライ記録では、その都度データの先頭記録パルス幅Ｄを所定記録パルス幅αづつ広げて（１回目のリトライ記録では先頭記録パルス幅Ｄはデフォルト値Ｄ０＋α，２回目のリトライ記録では先頭記録パルス幅Ｄはデフォルト値Ｄ０＋２α，・・・，９回目のリトライ記録では先頭記録パルス幅Ｄはデフォルト値Ｄ０＋９α）再記録し、１０回目のリトライ記録からはその都度データの先頭記録パルス幅Ｄを９αから所定記録パルス幅２αづつ広げて（１０回目のリトライ記録では先頭記録パルス幅Ｄはデフォルト値Ｄ０＋１１α，１１回目のリトライ記録では先頭記録パルス幅Ｄはデフォルト値Ｄ０＋１３α，・・・，ｎ回目のリトライ記録では先頭記録パルス幅Ｄはデフォルト値Ｄ０＋（２ｎ−９）α（ｎは１０以上の正の整数））再記録する。
【００５８】
一方、光ディスクから読み出したリトライ記録発生回数Ｎが既に１０回以上の場合、ステップ２１〜２４の処理でその都度データの先頭記録パルス幅Ｄを所定記録パルス幅２αづつ広げて（１０回目のリトライ記録では先頭記録パルス幅Ｄはデフォルト値Ｄ０＋２α，１１回目のリトライ記録では先頭記録パルス幅Ｄはデフォルト値Ｄ０＋４α，・・・，ｎ回目のリトライ記録では先頭記録パルス幅Ｄはデフォルト値Ｄ０＋２（ｎ−９）α）再記録する。
そして、ステップ１９の判断でリトライ記録回数Ｘが予め設定した所定回数ＸＭＡＸ以上なら、すなわち、光ディスクの記録先の記録領域に対して所定回数ＸＭＡＸ再記録してもデータを正しく記録できなかったと判断したとき、ステップ２０へ進んで光ディスク内に設けられた交替領域にデータを記録する記録処理（交替処理）を行う。
【００５９】
また、次のようにしても良い。まず、先頭記録パルス幅Ｄをデフォルト値Ｄ０でデータを記録し、そのデータを記録した記録領域を再生し、正しく記録されているか否かを判断する。ここで、記録エラーが発生しなければ正しく記録されているとして記録終了もしくは次の情報の記録を続ける。
一方、再生して記録エラーが発生した場合、その記録領域におけるリトライ記録発生回数Ｎが１０回未満であれば、初回リトライ記録時の先頭記録パルス幅Ｄをデフォルト値Ｄ０に所定記録パルス幅α×リトライ記録発生回数Ｎだけ加算し、１０回以上であればデフォルト値Ｄ０に所定記録パルス幅２αだけ加算し、リトライ記録をして記録エラーが発生しなければ記録終了もしくは次のデータの記録を続け、記録エラーが発生すればリトライ記録を行う。この一連の処理の流れを繰り返し、リトライ記録回数が予め定めた最大記録回数ＸＭＡＸに達すれば交替処理へ移行する。
【００６０】
また、記録エラーが発生しなかった場合、その記録領域でリトライ記録したか否かを判断し、リトライ記録をしているときはリトライ記録発生回数Ｎに１を加算して次回のオーバーライト時のリトライ記録発生回数としてメモリに記憶し、記録終了もしくは次の情報の記録を続ける。
この実施形態の光ディスク装置の第３の記録機能は、初回リトライ記録での先頭記録パルス幅をリトライ記録回数に応じて変化量を変化させることにより、正しく記録できる適切な記録パルス幅に到達するまでのリトライ記録回数を少なくすることができ、記録時間の短縮を実現することができる。
【００６１】
（４）この光ディスク記録装置におけるこの発明に係る第４の記録機能
第４の記録機能では、上述の第２の記録機能と第３の記録機能とは異なる方法でリトライ記録回数を少なくしている。
この第４の記録機能を実現するため、上記プログラムに、前回の記録時に行った再記録回数が所定回数以上のとき、上記記録手順によって記録するデータの記録パルス幅のうちの先頭記録パルス幅を初期値とは異なるパルス幅で上記データを記録するようにする手順を追加し、上記ＣＰＵ１５等がその手順も実行することにより、第４の記録機能を実現する。
【００６２】
次に、この第４の記録機能の動作を図５に示すフローチャート図に基づいて説明する。
図５は、この光ディスク記録装置における第４の記録処理を示すフローチャート図である。
この第４の記録処理は、ＣＰＵ１５が、ステップ（図中「Ｓ」で示す）３１で最初のデータの書き込みか否かを判断し、最初のデータの書き込み（最初のデータの記録）でない場合は光ディスクから記録先の記録領域におけるリトライ記録発生回数Ｎを読み出して初期値として設定してステップ３３へ進み、最初のデータの書き込みの場合、ステップ３２でデータ記録前にリトライ記録発生回数Ｎの値を０に設定してステップ３３へ進む。このリトライ記録発生回数は先頭記録パルス幅のパルス幅の異ならせる量を変更するタイミングを判断するためのカウント値である。
【００６３】
ステップ３３で初期値を設定する。その初期値の設定では、データを正しく記録できなかったときの再記録回数をカウントするための初期値としてリトライ記録回数（再記録回数）Ｘ＝０にし、データの再記録（リトライ記録）のときに先頭記録パルス幅Ｄを直前に記録したときとは異ならせるためのデフォルト値（初期値）Ｄ０とする。
ステップ３４でリトライ記録発生回数Ｎが予め設定した所定回数の１０回未満か否かを判断し、リトライ記録発生回数Ｎが所定回数の１０回以上のとき、ステップ３９へ進んでデータの先頭記録パルス幅Ｄに所定記録パルス幅αを加算してデータ記録するときの先頭記録パルス幅をＤ＋αにし、ステップ３５で光ピックアップから光ディスクにレーザ光を照射することにより、まず、光ディスクの記録先として指定された記録領域に先頭記録パルス幅をＤ＋αにしてデータを記録する。
【００６４】
次に、ステップ３６でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅をＤ＋αでデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ３７で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【００６５】
ステップ３７で記録エラー無しでデータが正しく記録されていると判断した場合、すなわち、誤り訂正の必要がない場合、もしくは誤り訂正によって全てのデータが正しく訂正できた場合はデータが正しく記録されているとしてステップ３８へ進んでリトライ記録回数Ｘ＝０か否かを判断し、リトライ記録回数Ｘ＝０ならデータ記録終了もしくは次のデータの記録を続け、リトライ記録回数Ｘ＝０でなければステップ４０でリトライ記録発生回数Ｎに１を加算してその記録領域におけるリトライ記録発生回数としてＲＡＭ等のメモリに格納し、データ記録終了もしくは次のデータの記録を続ける。その光ディスクの各記録領域におけるリトライ記録発生回数は、その光ディスクの管理領域や空き領域に記録するようにすると良い。そして、次回のオーバーライト時には、光ディスク上からその記録先の記録領域におけるリトライ記録発生回数を読み出してセットしてデータの記録を行う。
【００６６】
一方、ステップ３７の判断で記録エラー有りでデータが正しく記録できなかったと判断した場合、すなわち、データが誤り訂正コードを用いても正しく訂正できないデータがあった場合はデータが正しく記録できなかったとして、ステップ４１でリトライ記録回数Ｘが予め設定した所定回数（最大リトライ記録回数）ＸＭＡＸ以上になったか否かを判断する。
【００６７】
ステップ４１の判断でリトライ記録回数Ｘが予め設定した所定回数ＸＭＡＸ未満なら、ステップ４３へ進んでリトライ記録回数Ｘ＝Ｘ＋１でリトライ記録回数に１を加算し、ステップ４４で直前に記録したデータの先頭記録パルス幅Ｄ＋αに所定記録パルス幅αを加算してリトライ記録するときの先頭記録パルス幅をＤ＋２αにし、ステップ３５へ戻って光ピックアップから光ディスクにレーザ光を照射することにより、先頭記録パルス幅をＤ＋２αでデータをリトライ記録し、ステップ３６でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅をＤ＋２αでデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ３７で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【００６８】
また、ステップ４１の判断でリトライ記録回数Ｘが予め設定した所定回数ＸＭＡＸ以上なら、すなわち、光ディスクの記録先の記録領域に対して所定回数ＸＭＡＸ再記録してもデータを正しく記録できなかったと判断したとき、ステップ４２へ進んで光ディスク内に設けられた交替領域にデータを記録する記録処理（交替処理）を行う。
一方、ステップ３４の判断でリトライ記録発生回数Ｎが所定回数の１０回未満のとき、ステップ３５でリトライ記録発生回数Ｎ＝０とし、光ピックアップから光ディスクにレーザ光を照射することにより、まず、光ディスクの記録先として指定された記録領域に先頭記録パルス幅Ｄをデフォルト値Ｄ０にしてデータを記録する。
【００６９】
次に、ステップ３６でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅Ｄをデフォルト値Ｄ０でデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ３７で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【００７０】
ステップ３７で記録エラー無しでデータが正しく記録されていると判断した場合、すなわち、誤り訂正の必要がない場合、もしくは誤り訂正によって全てのデータが正しく訂正できた場合はデータが正しく記録されているとしてステップ３８へ進んでリトライ記録回数Ｘ＝０か否かを判断し、リトライ記録回数Ｘ＝０ならデータ記録終了もしくは次のデータの記録を続け、リトライ記録回数Ｘ＝０でなければステップ４０でリトライ記録発生回数Ｎに１を加算してその記録領域におけるリトライ記録発生回数としてＲＡＭ等のメモリに格納し、データ記録終了もしくは次のデータの記録を続ける。その光ディスクの各記録領域におけるリトライ記録発生回数は、その光ディスクの管理領域や空き領域に記録するようにすると良い。そして、次回のオーバーライト時には、光ディスク上からその記録先の記録領域におけるリトライ記録発生回数を読み出してセットしてデータの記録を行う。
【００７１】
また、ステップ３７の判断で記録エラー有りでデータが正しく記録できなかったと判断した場合、すなわち、データが誤り訂正コードを用いても正しく訂正できないデータがあった場合はデータが正しく記録できなかったとして、ステップ４１でリトライ記録回数Ｘが予め設定した所定回数（最大リトライ記録回数）ＸＭＡＸ以上になったか否かを判断する。
【００７２】
ステップ４１の判断でリトライ記録回数Ｘが予め設定した所定回数ＸＭＡＸ未満なら、ステップ４３へ進んでリトライ記録回数Ｘ＝Ｘ＋１でリトライ記録回数に１を加算し、ステップ４４で直前に記録したデータの先頭記録パルス幅Ｄに所定記録パルス幅αを加算してリトライ記録するときの先頭記録パルス幅をＤ＋αにし、ステップ３５へ戻って光ピックアップから光ディスクにレーザ光を照射することにより、先頭記録パルス幅をＤ＋αでデータをリトライ記録し、ステップ３６でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅をＤ＋αでデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ３７で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【００７３】
また、ステップ４１の判断でリトライ回数Ｘが予め設定した所定回数ＸＭＡＸ以上なら、すなわち、光ディスクの記録先の記録領域に対して所定回数ＸＭＡＸ再記録してもデータを正しく記録できなかったと判断したとき、ステップ４２へ進んで光ディスク内に設けられた交替領域にデータを記録する記録処理（交替処理）を行う。
このようにして、光ディスク１の記録先の記録領域に対してリトライ記録発生回数が０〜９回まではリトライ記録の度に先頭記録パルス幅Ｄをデフォルト値Ｄ０から徐々に広げていき、１０回からは最初から先頭記録パルス幅Ｄを広げてＤ＋αにし、その値から徐々に広げていく。
【００７４】
また、次のようにしても良い。リトライ記録が発生する前の初回記録において、それまでの記録のリトライ発生回数を調べる。リトライ記録発生回数Ｎが１０回未満であれば、初回記録時の先頭パルス幅はデフォルト値Ｄ０で、１０回以上であればデフォルト値Ｄ０にαだけ加算して記録する。その記録した領域を再生して記録エラーが発生しなければ記録終了もしくは次のデータの記録を続け、記録エラーが発生すればリトライ記録を行う。この一連の処理の流れを繰り返し、リトライ記録回数が予め定めた最大記録回数ＸＭＡＸに達すれば交替処理へ移行する。また、記録エラーが発生しなかった場合、その領域でリトライ記録したか否かを判断し、リトライ記録をしているときはリトライ記録発生回数Ｎに１を加算し、データ記録終了もしくは次のデータの記録を続ける。
【００７５】
この実施形態の光ディスク装置の第４の記録機能は、初回の記録で正しく記録できる確率を上げることにより、リトライ記録が発生する頻度を少なくすることができ、記録時間の短縮を実現することができる。
【００７６】
（５）この光ディスク記録装置におけるこの発明に係る第５の記録機能
上述の第１〜第４の記録機能では、記録パルス幅はデフォルトで最適に設定されており、パルス幅を変化させたときに記録品質が若干落ちる。記録パルス幅を変化させてリトライ記録を行う前に、記録品質が落ちない手段でリトライ記録を行う必要がある。
そこで、第５の記録機能では、記録品質が落ちない手段でリトライ記録を行うようにしている。
【００７７】
この第５の記録機能を実現するため、光ディスク装置のＣＰＵ１５のＲＯＭ１４又はＲＡＭ１６に、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手順と、その記録手順によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する判断手順と、その判断手順によって正しく記録できなかったと判断したとき、上記レーザ光の記録パワーを直前に記録したときの記録パワーよりも大きいパワーにして上記データを上記記録領域に再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う第１の再記録手順と、その第１の再記録手順によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う第２の再記録手順と、その第２の再記録手順によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手順とを実行させるためのプログラムをインストール（ＣＰＵが実行可能に格納）する。
【００７８】
そして、ＣＰＵ１５がそのプログラムを実行することにより、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録し、その記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったとき、上記レーザ光の記録パワーを直前に記録したときの記録パワーよりも大きいパワーにして上記データを上記記録領域に再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行い、その所定回数再記録しても正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行い、その所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する記録処理を行う。
【００７９】
すなわち、上記ＣＰＵ１５等が、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手段と、その記録手段によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する判断手段と、その判断手段によって正しく記録できなかったと判断したとき、上記レーザ光の記録パワーを直前に記録したときの記録パワーよりも大きいパワーにして上記データを上記記録領域に再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う第１の再記録手段と、その第１の再記録手段によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う第２の再記録手段と、その第２の再記録手段によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手段の機能を果たす。
【００８０】
次に、この第５の記録機能の動作を図６に示すフローチャート図に基づいて説明する。
図６は、この光ディスク記録装置における第５の記録処理を示すフローチャート図である。
【００８１】
この第５の記録処理は、ＣＰＵ１５が、ステップ（図中「Ｓ」で示す）５１で記録パワーＰをデフォルト値Ｐ０に、記録パワーの上限値Ｐを予め設定された所定値Ｐｌｉｍにそれぞれ設定し、ステップ５２で先頭記録パルス幅Ｄをデフォルト値Ｄ０に設定し、ステップ５３でデータを正しく記録できなかったときの再記録回数をカウントするための初期値としてリトライ記録回数（再記録回数）Ｘ＝０に、リトライ記録発生回数Ｎの値を０にそれぞれ設定し、ステップ５４で光ピックアップから光ディスクにレーザ光を照射することにより、まず、光ディスクの記録先として指定された記録領域に記録パワーＰをデフォルト値Ｐ０にし、先頭記録パルス幅Ｄをデフォルト値Ｄ０にしてデータを記録する。
【００８２】
次に、ステップ５５でその記録したデータを再生し、光ピックアップから光ディスクに記録パワーＰをデフォルト値Ｐ０で、先頭記録パルス幅Ｄをデフォルト値Ｄ０でデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ５６で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
ステップ５６で記録エラー無しでデータが正しく記録されていると判断した場合、すなわち、誤り訂正の必要がない場合、もしくは誤り訂正によって全てのデータが正しく訂正できた場合はデータが正しく記録されているとしてデータ記録終了もしくは次のデータの記録を続ける。
【００８３】
一方、ステップ５６の判断で記録エラー有りでデータが正しく記録できなかったと判断した場合、すなわち、データが誤り訂正コードを用いても正しく訂正できないデータがあった場合はデータが正しく記録できなかったとして、ステップ５７へ進んで記録パワーＰが上限値Ｐｌｉｍ以上か否かを判断し、記録パワーＰが上限値Ｐｌｉｍ以上でなければ、ステップ６２へ進んで記録パワーＰを直前に記録したときの記録パワーよりも所定記録パワーβ分だけ大きくして、すなわち次のリトライ記録の記録パワーをＰ＋βにしてステップ５４へ戻って光ピックアップから光ディスクにレーザ光を照射することにより、光ディスクの記録先として指定された記録領域に記録パワーＰ＋βにし、先頭記録パルス幅Ｄをデフォルト値Ｄ０のままにしてデータをリトライ記録する。
【００８４】
次に、ステップ５５でそのリトライ記録したデータを再生し、光ピックアップから光ディスクに記録パワーをＰ＋βで、先頭記録パルス幅Ｄをデフォルト値Ｄ０のままでデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ５６で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。この処理を記録パワーＰが上限値Ｐｌｉｍになるまで所定回数繰り返す。
【００８５】
このようにして、データの書き換えが可能な光ディスクの記録先に指定された記録領域にレーザ光を照射することによってデータを記録し、その記録したデータを再生し、その再生したデータに基づいて記録領域にデータを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったとき、レーザ光の記録パワーを直前に記録したときの記録パワーよりも大きいパワーにして同じデータを同じ記録領域に再記録し、その再記録したデータを再生し、その再生したデータに基づいて再記録したデータが記録領域に正しく記録できたか否かを判断する動作を記録パワーＰが上限値Ｐｌｉｍになるまで所定回数行う。
【００８６】
上述の処理を行い、ステップ５７の判断で記録パワーＰが上限値Ｐｌｉｍになったら、ステップ５８へ進んで今度はデータの先頭記録パルス幅Ｄをデフォルト値Ｄ０よりも所定記録パルス幅αだけ大きくして、すなわち先頭記録パルス幅ＤをＤ＋αにして、ステップ５９で光ピックアップから光ディスクにレーザ光を照射することにより、記録パワーＰを直前のリトライ記録の時のままの値（上限値Ｐｌｉｍ未満の最大値）にし、先頭記録パルス幅をＤ＋αでデータをリトライ記録し、ステップ６０でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅をＤ＋αでデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ６１で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【００８７】
ステップ６１で記録エラー無しでデータが正しく記録されていると判断した場合、すなわち、誤り訂正の必要がない場合、もしくは誤り訂正によって全てのデータが正しく訂正できた場合はデータが正しく記録されているとしてデータ記録終了もしくは次のデータの記録を続ける。
一方、ステップ６１の判断で記録エラー有りでデータが正しく記録できなかったと判断した場合、すなわち、データが誤り訂正コードを用いても正しく訂正できないデータがあった場合はデータが正しく記録できなかったとして、ステップ６３でリトライ記録回数Ｘが予め設定した所定回数（最大リトライ記録回数）ＸＭＡＸ以上になったか否かを判断する。
【００８８】
ステップ６３の判断でリトライ記録回数Ｘが予め設定した所定回数ＸＭＡＸ未満なら、ステップ６５へ進んでリトライ記録回数Ｘ＝Ｘ＋１でリトライ記録回数に１を加算し、ステップ５８へ戻って直前に記録したデータの先頭記録パルス幅Ｄに更に所定記録パルス幅αを加算してリトライ記録するときの先頭記録パルス幅をＤ＋２αにし、ステップ５９で光ピックアップから光ディスクにレーザ光を照射することにより、先頭記録パルス幅をＤ＋２αでデータをリトライ記録し、ステップ６０でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅をＤ＋２αでデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ６１で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【００８９】
このようにして、記録パワーＰを大きくしてリトライ記録する動作を所定回数繰り返しても正しく記録できなかったと判断したとき、今度は同じ記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で再記録し、その再記録したデータを再生し、その再生したデータに基づいて再記録したデータが記録領域に正しく記録できたか否かを判断する動作をリトライ記録回数Ｘが所定回数ＸＭＡＸ所定回数になるまで行う。
そして、ステップ６３の判断でリトライ記録回数Ｘが予め設定した所定回数ＸＭＡＸ以上なら、すなわち、光ディスクの記録先の記録領域に対して所定回数ＸＭＡＸ再記録してもデータを正しく記録できなかったと判断したとき、ステップ６４へ進んで光ディスク内に設けられた交替領域にデータを記録する記録処理（交替処理）を行う。
【００９０】
この第５の記録処理は、記録パワーＰをデフォルト値Ｐ０に、先頭記録パルス幅をデフォルト値Ｄ０にしてデータを記録し、その記録した記録領域を再生し、正しく記録されているか否かを判断する。ここで、記録エラーが発生しなければ正しく記録されているとして記録終了もしくは次のデータの記録を続ける。
一方、再生して記録エラーが発生すれば、記録パワーをβだけ大きく設定してリトライ記録を行う。リトライ記録をして記録エラーが発生しなければ記録終了もしくは次のデータの記録を続け、記録エラーが発生すればさらに記録パワーをβだけ大きくしてリトライ記録を行う。この一連の処理の流れを繰り返し、記録パワーが予め設定された上限値Ｐｌｉｍに達した場合、先頭記録パルス幅Ｄをデフォルト値よりも広くなるように変えることによりリトライ記録を行う。
【００９１】
まず、先頭記録パルス幅をデフォルト値Ｄ０よりもαだけ広く設定してリトライ記録を行う。リトライ記録をして記録エラーが発生しなければ記録終了もしくは次のデータの記録を続け、記録エラーが発生すればさらに先頭記録パルス幅をα広げて（デフォルト値よりも２α広げて）リトライ記録を行う。この一連の処理の流れを繰り返し、リトライ記録回数が予め定めた最大回数ＸＭＡＸに達すれば交替処理へ移行する。
この実施形態の光ディスク装置の第５の記録機能は、レーザダイオードが劣化しない範囲においては、記録パワーを大きくしてリトライ記録することによって記録品質を良好に保つことができる。
【００９２】
（６）この光ディスク記録装置におけるこの発明に係る第６の記録機能
上述の記録機能では、リトライ記録時にデフォルト値よりも広い先頭記録パルス幅で記録し、リトライ記録から交替処理への移行を、再生したデータの誤り訂正コードを用いても正しく訂正できなかったデータの数が一定量を越えたか否かによって判断したが、再生したデータの誤り訂正コードを用いても正しく訂正できなかったデータの数の増減を判断材料とすることもでき、その場合、上述の記録機能に比べてリトライ記録の繰り返し回数を少なくすることができる。
また、上述の記録機能でもリトライ記録が発生する毎に繰り返し回数を減少させることはできるが、その記録処理のプログラムは電源遮断後あるいはリセット後に初期化される。
【００９３】
そこで、電源遮断後あるいはリセット後も記録処理のプログラムが存続するようにすれば、同種類の光ディスクであれば２枚目以降の光ディスクは初回のリトライ記録発生時の繰り返し回数が１枚目の時よりも減少させることができる。そのため、同種類の光ディスクを複数枚記録する場合、記録時間の短縮効果が大きくなる。
この第６の記録機能では、さらにリトライ記録回数と１枚あたりの光ディスクのデータ記録時間を短縮している。
【００９４】
この第６の記録機能を実現するため、光ディスク装置のＲＯＭ１４又はＲＡＭ１６に、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手順と、その記録手順によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に前記データを正しく記録できたか否かを判断する第１の判断手順と、その第１の判断手順によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータの誤り訂正コードを用いても正しく訂正できなかったデータ数が直前に記録したときの正しく訂正できなかったデータ数よりも増えたか否かに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う再記録手順と、その再記録手順によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手順と、上記再記録手順による再記録のときに上記再生したデータについて誤り訂正コードを用いても正しく訂正できなかったデータの数に基づいて上記再記録手順によるデータの再記録を繰り返すか上記交替記録手順によって上記交替領域に上記データを記録するかを判断する第２の判断手順と、その第２の判断手順の判断結果に基づいて上記再記録手順によるデータの再記録を繰り返すか上記交替記録手順によって上記交替領域に上記データを記録するかを切り換える手順とを実行させるためのプログラムをインストール（ＣＰＵが実行可能に格納）する。
【００９５】
そして、ＣＰＵ１５がそのプログラムを実行することにより、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録し、その記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータの誤り訂正コードを用いても正しく訂正できなかったデータ数が直前に記録したときの正しく訂正できなかったデータ数よりも増えたか否かに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行い、その所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録し、上記再記録のときに上記再生したデータについて誤り訂正コードを用いても正しく訂正できなかったデータの数に基づいて上記データの再記録を繰り返すか上記交替領域に前記データを記録するかを判断し、その判断結果に基づいて上記データの再記録を繰り返すか上記交替領域に上記データを記録するかを切り換える記録処理を行う。
【００９６】
すなわち、上記ＣＰＵ１５等が、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手段と、その記録手段によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する第１の判断手段と、その第１の判断手段によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータの誤り訂正コードを用いても正しく訂正できなかったデータ数が直前に記録したときの正しく訂正できなかったデータ数よりも増えたか否かに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う再記録手段と、その再記録手段によって所定回数再記録しても正しく記録できなかったと判断したとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手段と、上記再記録手段による再記録のときに上記再生したデータについて誤り訂正コードを用いても正しく訂正できなかったデータの数に基づいて上記再記録手段によるデータの再記録を繰り返すか上記交替記録手段によって上記交替領域に上記データを記録するかを判断する第２の判断手段と、その第２の判断手段の判断結果に基づいて上記再記録手段によるデータの再記録を繰り返すか上記交替記録手段によって上記交替領域に上記データを記録するかを切り換える手段の機能を果たす。
【００９７】
次に、この第６の記録機能の動作を図７に示すフローチャート図に基づいて説明する。
図７は、この光ディスク記録装置における第６の記録処理を示すフローチャート図である。
この第６の記録処理は、ＣＰＵ１５が、ステップ（図中「Ｓ」で示す）７１で最初のデータの書き込みか否かを判断し、最初のデータの書き込みの場合、ステップ７２で最大記録可能先頭記録パルス幅ＤＭＡＸをデフォルト値Ｄ０に設定してステップ７３へ進む。また、最初のデータの書き込み（最初のデータの記録）でない場合はそのままステップ７３へ進む。
【００９８】
ステップ７３で初期値を設定する。その初期値の設定では、交替処理移行判定値Ｙに初期値“０”を設定し、データの再記録（リトライ記録）のときに先頭記録パルス幅Ｄを直前に記録したときとは異ならせるためのデフォルト値（初期値）Ｄ０を設定する。
ステップ７４で光ピックアップから光ディスクにレーザ光を照射することにより、まず、光ディスクの記録先として指定された記録領域に先頭記録パルス幅Ｄをデフォルト値Ｄ０にしてデータを記録する。
次に、ステップ７５でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅Ｄをデフォルト値Ｄ０でデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ７６で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【００９９】
ステップ７６で記録エラー無しでデータが正しく記録されていると判断した場合、すなわち、誤り訂正の必要がない場合、もしくは誤り訂正によって全てのデータが正しく訂正できた場合はデータが正しく記録されているとしてステップ７７へ進んで先頭記録パルス幅Ｄが最大記録可能先頭記録パルス幅ＤＭＡＸより大きいか否かを判断し、大きくなければデータ記録終了もしくは次のデータの記録を続ける。また、大きければステップ７８へ進んでその先頭記録パルス幅Ｄを最大記録可能先頭記録パルス幅ＤＭＡＸとしてメモリ（光ディスク１の管理領域や空き領域やＲＡＭ１６等）に格納し、データ記録終了もしくは次のデータの記録を続ける。
【０１００】
一方、ステップ７６の判断で記録エラー有りでデータが正しく記録できなかったと判断した場合、すなわち、データが誤り訂正コードを用いても正しく訂正できないデータがあった場合はデータが正しく記録できなかったとして、ステップ７９でその訂正不可能データ数（データが誤り訂正コードを用いても正しく訂正できなかったデータの数）Ｘを求め、ステップ８０で交替処理移行判定値Ｙ＝０か否かを判断し、交替処理移行判定値Ｙ＝０なら、ステップ８３へ進んで交替処理移行判定値Ｙを訂正不可能データ数Ｘにし、ステップ８４で直前に記録したデータの先頭記録パルス幅Ｄに所定記録パルス幅αを加算し、ステップ７４へ戻って光ピックアップから光ディスクにレーザ光を照射することにより、先頭記録パルス幅をＤ＋αでデータをリトライ記録し、ステップ７５でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅をＤ＋αでデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ７６で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【０１０１】
次に、ステップ８０で交替処理移行判定値Ｙ＝０でなければ、ステップ８１で訂正不可能データ数Ｘが交替処理移行判定値Ｙよりも多いか否かを判断する。すなわち、再記録したデータを再生し、その再生したデータの誤り訂正コードを用いても正しく訂正できなかったデータ数が直前に記録したときの正しく訂正できなかったデータ数よりも増えたか否かに基づいて再記録したデータが記録領域に正しく記録できたか否かを判断する。
ステップ８１の判断で訂正不可能データ数Ｘが交替処理移行判定値Ｙよりも多くなければ、ステップ８３へ進んで上述の処理を繰り返す。また、訂正不可能データ数Ｘが交替処理移行判定値Ｙよりも多ければ、すなわち、再生したデータの誤り訂正コードを用いても正しく訂正できなかったデータ数が直前に記録したときの正しく訂正できなかったデータ数よりも増えたら、ステップ８２へ進んで光ディスク内に設けられた交替領域にデータを記録する記録処理（交替処理）を行う。
【０１０２】
この処理は、まず、光ピックアップ３から光ディスク１にレーザ光を照射することにより、先頭記録パルス幅をデフォルト値Ｄ０で記録する。次に、光ピックアップ３から記録した記録領域の再生信号を得て、リードアンプ６で増幅した後に２値化し、ＣＤデコーダ８でＥＦＭ復調し、誤り訂正の処理を行い、正しく記録されているか否かを判断する。ここで、誤り訂正の必要がない、もしくは、誤り訂正によって全てのデータが正しく訂正できた場合、正しく記録されているとして記録終了もしくは次のデータの記録を続ける。
また、誤り訂正コードを用いても正しく訂正できないデータがあった場合、訂正不可能データ数Ｘを交替処理移行判定値Ｙとし、先頭記録パルス幅をαだけ広く設定してリトライ記録を行う。リトライ記録をして、そのデータが誤り訂正コードを用いても訂正できない記録エラーが発生しなければ記録終了もしくは次のデータの記録を続ける。
【０１０３】
それでも記録エラーが発生した場合、訂正不可能データ数Ｘを交替処理移行判定値Ｙと比較し、訂正不可能データ数Ｘが交替処理移行判定値Ｙより大きければ交替処理へ移行し、同じ又は少なければ訂正不可能データ数Ｘを交替処理移行判定値Ｙとして保存し、先頭記録パルス幅をαだけ広く設定し、リトライ記録を行う。以下、この一連の流れの処理を繰り返す。
【０１０４】
この実施形態の光ディスク装置の第６の記録機能は、リトライ記録において、記録後に再生したデータの誤り訂正コードを用いても正しく訂正できなかったデータの数が直前のリトライ記録時の数より増えた場合は、その後リトライ記録を繰り返しても正しく記録できない可能性が高いことに着目し、そのような場合、リトライ記録の繰り返しを中止し、交替領域への記録に移行することにより、正しく記録できない可能性が高いリトライ記録の回数を減らすことができ、記録時間の短縮を実現することができる。
【０１０５】
（７）この光ディスク記録装置におけるこの発明に係る第７の記録機能
上述の第６の記録機能において、リトライ記録で先頭パルス幅を広げても記録エラーが発生する原因として、広げた幅の量が足りないことが挙げられるが、その他に、先頭パルス幅を広げすぎたために記録ピットの形状が記録ディスクに適さない形状になっていることも挙げられる。
記録ディスクに適さない記録ピット形状となる先頭パルス幅のリトライ記録は、正しく記録できない可能性が高く、記録時間を長める原因となるので、実行しないようにする必要がある。
そこで、第７の記録機能では、さらに記録時間を短縮している。
【０１０６】
この第７の記録機能を実現するため、光ディスク装置のＲＯＭ１４又はＲＡＭ１６に、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手順と、その記録手順によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する判断手順と、その判断手順によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う再記録手順と、その再記録手順によって所定回数再記録して正しく記録できたデータの先頭記録パルス幅のうちの最大値である最大先頭記録パルス幅を記憶する最大先頭記録パルス幅記憶手順と、次に上記記録手順によってデータの書き換えが可能な記録媒体の記録領域にデータを記録したとき、その記録したデータを再生し、その再生したデータに基づいて上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったと判断したとき、上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録する動作を所定回数行い、その所定回数の動作を行う内に上記再記録するデータの先頭記録パルス幅が上記最大先頭記録パルス幅記憶手順によって記憶された最大先頭記録パルス幅以上になったとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手順とを実行させるためのプログラムをインストール（ＣＰＵが実行可能に格納）する。
【０１０７】
そして、ＣＰＵ１５がそのプログラムを実行することにより、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録し、その記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行い、その所定回数再記録して正しく記録できたデータの先頭記録パルス幅のうちの最大値である最大先頭記録パルス幅を記憶し、次にデータの書き換えが可能な記録媒体の記録領域にデータを記録したとき、その記録したデータを再生し、その再生したデータに基づいて上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったと判断したとき、上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録する動作を所定回数行い、その所定回数の動作を行う内に上記再記録するデータの先頭記録パルス幅が上記記憶された最大先頭記録パルス幅以上になったとき、上記記録媒体内に設けられた交替領域に上記データを記録する記録処理を行う。
【０１０８】
すなわち、上記ＣＰＵ１５等が、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録する記録手段と、その記録手段によって記録したデータを再生し、その再生したデータに基づいて上記記録領域に上記データを正しく記録できたか否かを判断する判断手段と、その判断手段によって正しく記録できなかったと判断したとき、上記記録領域に上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録し、その再記録したデータを再生し、その再生したデータに基づいて上記再記録したデータが上記記録領域に正しく記録できたか否かを判断する動作を所定回数行う再記録手段と、その再記録手段によって所定回数再記録して正しく記録できたデータの先頭記録パルス幅のうちの最大値である最大先頭記録パルス幅を記憶する最大先頭記録パルス幅記憶手段と、次に上記記録手段によってデータの書き換えが可能な記録媒体の記録領域にデータを記録したとき、その記録したデータを再生し、その再生したデータに基づいて上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったと判断したとき、上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録する動作を所定回数行い、その所定回数の動作を行う内に上記再記録するデータの先頭記録パルス幅が上記最大先頭記録パルス幅記憶手段に記憶された最大先頭記録パルス幅以上になったとき、上記記録媒体内に設けられた交替領域に上記データを記録する交替記録手段の機能を果たす。
【０１０９】
次に、この第７の記録機能の動作を図７と図８に示すフローチャート図に基づいて説明する。
図８は、この光ディスク記録装置における第７の記録処理を示すフローチャート図である。
この第７の記録処理は、ＣＰＵ１５が、図７のフローチャート図に示した処理を実行する。その処理では、ステップ７８で最大記録可能先頭記録パルス幅ＤＭＡＸを保存している。リトライ記録が発生していない場合には最大記録先頭記録パルス幅ＤＭＡＸはデフォルト値Ｄ０のままであるが、リトライ記録によって正しく記録が行われた場合、その時点の先頭記録パルス幅Ｄが最大記録可能先頭記録パルス幅ＤＭＡＸとして保存される。
【０１１０】
そして、最大記録可能先頭記録パルス幅ＤＭＡＸにデフォルト値Ｄ０と異なる値が入った場合、ＣＰＵ１５は、図８のフローチャート図に示す処理動作に移行する。
ここで、図７に示したフローチャート図の処理から図８のフローチャート図に示す処理へ移行するか否かの判定は、リトライ記録が発生した回数を基準としてもよいし、最大記録可能先頭記録パルス幅ＤＭＡＸが更新された回数を基準としてもよい。
図８のフローチャート図に示した処理に移行した後の記録では、ＣＰＵ１５は、ステップ９１で初期値を設定する。その初期値の設定では、データの再記録（リトライ記録）のときに先頭記録パルス幅Ｄを直前に記録したときとは異ならせるためのデフォルト値（初期値）Ｄ０にする。
【０１１１】
ステップ９２で光ピックアップから光ディスクにレーザ光を照射することにより、まず、光ディスクの記録先として指定された記録領域に先頭記録パルス幅Ｄをデフォルト値Ｄ０にしてデータを記録する。
次に、ステップ９３でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅Ｄをデフォルト値Ｄ０でデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ９４で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【０１１２】
ステップ９４で記録エラー無しでデータが正しく記録されていると判断した場合、すなわち、誤り訂正の必要がない場合、もしくは誤り訂正によって全てのデータが正しく訂正できた場合はデータが正しく記録されているとしてデータ記録終了もしくは次のデータの記録を続ける。
一方、ステップ９４の判断で記録エラー有りでデータが正しく記録できなかったと判断した場合、すなわち、データが誤り訂正コードを用いても正しく訂正できないデータがあった場合はデータが正しく記録できなかったとして、ステップ９５で先頭記録パルス幅Ｄが最大記録可能先頭記録パルス幅ＤＭＡＸ以上になったか否かを判断する。
【０１１３】
ステップ９５の判断で先頭記録パルス幅Ｄが最大記録可能先頭記録パルス幅ＤＭＡＸ未満なら、ステップ９７へ進んで直前に記録したデータの先頭記録パルス幅Ｄに所定記録パルス幅αを加算してリトライ記録するときの先頭記録パルス幅をＤ＋αにし、ステップ９２へ戻って光ピックアップから光ディスクにレーザ光を照射することにより、先頭記録パルス幅をＤ＋αでデータをリトライ記録し、ステップ９３でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅をＤ＋αでデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ９４で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【０１１４】
このようにして、最初に光ディスク１の記録先の記録領域に先頭記録パルス幅Ｄをデフォルト値Ｄ０にしたデータを記録し、その記録したデータを再生し、その再生したデータに基づいて記録領域にデータを正しく記録できたか否かを判断する。その判断によって正しく記録できなかったとき、直前のデータの記録パルス幅のうちの先頭記録パルス幅Ｄに所定の記録パルス幅αを加算して直前に記録したときとは異なるパルス幅にしてデータを再記録し、その再記録したデータを再生し、その再生したデータに基づいて再記録したデータが記録領域に正しく記録できたか否かを判断する動作を先頭記録パルス幅Ｄが最大記録可能先頭記録パルス幅ＤＭＡＸ以上になるまで行う。
【０１１５】
そして、ステップ９５の判断で先頭記録パルス幅Ｄが最大記録可能先頭記録パルス幅ＤＭＡＸ以上なら、すなわち、先頭記録パルス幅Ｄが最大先頭記録パルス幅以上になったとき、ステップ９６へ進んで光ディスク内に設けられた交替領域にデータを記録する記録処理（交替処理）を行う。
この処理は、最大記録先頭記録パルス幅ＤＭＡＸを基準としてリトライ記録から交替処理へ移行する判断を行う。
【０１１６】
まず、先頭記録パルス幅をデフォルト値Ｄ０にしてデータを記録する。次に、そのデータを再生し、誤り訂正の処理を行い、正しく記録されているか否かを判断する。ここで、誤り訂正の必要がない、もしくは、誤り訂正によって全てのデータが正しく訂正できた場合、正しく記録されているとして記録終了もしくは次のデータの記録を続ける。誤り訂正コードを用いても正しく訂正できないデータがあった場合、その時点の先頭記録パルス幅Ｄを最大記録可能先頭記録パルス幅ＤＭＡＸと比較し、先頭記録パルス幅Ｄが最大記録可能先頭記録パルス幅ＤＭＡＸよりも大きければ交替処理へ移行し、少なければ先頭記録パルス幅をαだけ広く設定してリトライ記録を行う。以下、この一連の流れの処理を繰り返す。
上記判断基準は、最大記録可能先頭記録パルス幅ＤＭＡＸとしてもよいし、マージンをとって最大記録可能先頭記録パルス幅ＤＭＡＸよりも幾分大きい値としてもよい。
【０１１７】
この実施形態の光ディスク装置の第７の記録機能は、リトライ記録を繰り返すか交替領域への記録に移行するかを、それ以前の記録領域で発生したリトライ記録において正しく記録できた先頭記録パルス幅と比較して判断することによって、正しく記録できない可能性が高いリトライ記録の回数を減らすことができ、記録時間の短縮を実現することができる。
【０１１８】
（８）この光ディスク記録装置におけるこの発明に係る第８の記録機能
あるディスクにおいて、記録ピットの形状が光ディスクに適さない形状になるほど広げた先頭記録パルス幅は、同種類の他の光ディスクにおいても適さないのが一般的である。
したがって、同種類の他の光ディスクに記録する場合にも上記先頭記録パルス幅は活用可能であり、また活用することによって記録時間の短縮が実現できる。
しかし、上述の記録機能では、電源遮断後あるいはリセット後に上記先頭記録パルス幅のデータがメモリに残っていたとしても、記録速度及び光ディスクの種類までは記憶していないために活用が不可能である。
そこで、第８の記録機能では、電源遮断後あるいはリセット後に光ディスクの種類とともに、上記先頭記録パルス幅を保持するものである。
【０１１９】
この第８の記録機能を実現するため、上記プログラムに、上記最大先頭記録パルス幅と共に、その時の記録速度及び記録媒体の種類とを記憶し、自装置の電源遮断後あるいはリセット後も保持し続ける手順を追加し、上記ＣＰＵ１５等がその手順も実行することにより、第８の記録機能を実現する。
この第８の記録処理は、ＣＰＵ１５が、上述の記録処理の動作で全てのデータの記録を終えた後、最終的に決定している最大記録可能先頭記録パルス幅ＤＭＡＸと光ディスクの種類と記録速度とを対応させて参照可能にＲＡＭ１６に保存する処理を行う。
【０１２０】
これにより、電源遮断後あるいはリセット後でも、同種類の光ディスクを複数枚記録する場合、ＲＡＭ１６に格納されたその種類の光ディスクに対応する最大記録可能先頭記録パルス幅ＤＭＡＸを読み出してセットし、その記録パルス幅で２枚目以降のデータ記録を行うことができる。したがって、２枚目以降のデータ記録のときにはリトライ記録の回数を大幅に低減することができる。
この実施形態の光ディスク装置の第８の記録機能は、同種類の光ディスクを複数枚記録する場合、１枚目の記録のリトライ記録で正しく記録できた時の最大先頭記録パルス幅のデータを２枚目以降の記録にも活用することにより、同種類の複数枚の光ディスクに対するデータの記録時間を短縮することができる。
【０１２１】
（９）この光ディスク記録装置におけるこの発明に係る第９の記録機能
同種類の光ディスクを複数枚記録する場合、上述の記録機能の工程を光ディスク毎に行うのは記録時間が長くなって問題である。
そこで、第９の記録機能では、同種類の光ディスクを複数枚記録する場合の記録時間を短縮する。
【０１２２】
この第９の記録機能を実現するため、上記プログラムに、自装置の電源遮断後あるいはリセット後、データの書き換えが可能な記録媒体の記録領域にレーザ光を照射することによってデータを記録し、その記録したデータを再生し、その再生したデータに基づいて上記データを正しく記録できたか否かを判断し、その判断によって正しく記録できなかったと判断したとき、上記データの記録パルス幅のうちの先頭記録パルス幅を直前に記録したときとは異なるパルス幅で上記データを再記録する動作を所定回数行い、その所定回数の動作を行う内に上記再記録するデータの先頭記録パルス幅が上記記憶された最大先頭記録パルス幅以上になったとき、上記記録媒体内に設けられた交替領域に上記データを記録する手順を追加し、上記ＣＰＵ１５等がその手順も実行することにより、第９の記録機能を実現する。
【０１２３】
次に、この第９の記録機能の動作を同じく図８に示すフローチャート図に基づいて説明する。
この第８の記録処理は、ＣＰＵ１５が、光ディスクの最初のデータ記録から図８に示す処理を行う。
ＣＰＵ１５は、まず、ステップ９１で光ディスクの種類と記録速度を判別し、それに該当する最大記録可能先頭記録パルス幅ＤＭＡＸがＲＡＭに保存されていれば、その値を引き出してデータ記録時の最大記録可能先頭記録パルス幅ＤＭＡＸとする。
ステップ９１で初期値を設定する。その初期値の設定では、データの再記録（リトライ記録）のときに先頭記録パルス幅Ｄを直前に記録したときとは異ならせるためのデフォルト値（初期値）Ｄ０にする。
【０１２４】
ステップ９２で光ピックアップから光ディスクにレーザ光を照射することにより、まず、光ディスクの記録先として指定された記録領域に先頭記録パルス幅Ｄをデフォルト値Ｄ０にしてデータを記録する。
次に、ステップ９３でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅Ｄをデフォルト値Ｄ０でデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ９４で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【０１２５】
ステップ９４で記録エラー無しでデータが正しく記録されていると判断した場合、すなわち、誤り訂正の必要がない場合、もしくは誤り訂正によって全てのデータが正しく訂正できた場合はデータが正しく記録されているとしてデータ記録終了もしくは次のデータの記録を続ける。
一方、ステップ９４の判断で記録エラー有りでデータが正しく記録できなかったと判断した場合、すなわち、データが誤り訂正コードを用いても正しく訂正できないデータがあった場合はデータが正しく記録できなかったとして、ステップ９５で先頭記録パルス幅Ｄが最大記録可能先頭記録パルス幅ＤＭＡＸ以上になったか否かを判断する。
【０１２６】
ステップ９５の判断で先頭記録パルス幅Ｄが最大記録可能先頭記録パルス幅ＤＭＡＸ未満なら、ステップ９７へ進んで直前に記録したデータの先頭記録パルス幅Ｄに所定記録パルス幅αを加算してリトライ記録するときの先頭記録パルス幅をＤ＋αにし、ステップ９２へ戻って光ピックアップから光ディスクにレーザ光を照射することにより、先頭記録パルス幅をＤ＋αでデータをリトライ記録し、ステップ９３でその記録したデータを再生し、光ピックアップから光ディスクに先頭記録パルス幅をＤ＋αでデータを記録した領域の再生信号を得て、ＲＦアンプで増幅した後に２値化し、ＣＤデコーダでＥＦＭ復調し、ＣＤ−ＲＯＭデコーダで誤り訂正の処理を行い、ステップ９４で記録エラー無しか否かを判断することによってデータが正しく記録されているか否かを判断する。
【０１２７】
このようにして、最初に光ディスク１の記録先の記録領域に先頭記録パルス幅Ｄをデフォルト値Ｄ０にしたデータを記録し、その記録したデータを再生し、その再生したデータに基づいて記録領域にデータを正しく記録できたか否かを判断する。その判断によって正しく記録できなかったとき、直前のデータの記録パルス幅のうちの先頭記録パルス幅Ｄに所定の記録パルス幅αを加算して直前に記録したときとは異なるパルス幅にしてデータを再記録し、その再記録したデータを再生し、その再生したデータに基づいて再記録したデータが記録領域に正しく記録できたか否かを判断する動作を先頭記録パルス幅Ｄが最大記録可能先頭記録パルス幅ＤＭＡＸ以上になるまで行う。
【０１２８】
そして、ステップ９５の判断で先頭記録パルス幅Ｄが最大記録可能先頭記録パルス幅ＤＭＡＸ以上なら、すなわち、先頭記録パルス幅Ｄが最大先頭記録パルス幅以上になったとき、ステップ９６へ進んで光ディスク内に設けられた交替領域にデータを記録する記録処理（交替処理）を行う。
この実施形態の光ディスク装置の第９の記録機能は、同種類の光ディスクを複数枚記録する場合、２枚目以降ではリトライ記録において正しく記録できる先頭記録パルス幅の最大記録パルス幅を求める工程をなくすことができ、記録時間のさらなる短縮を実現することができる。
【０１２９】
上記実施形態では、この発明に係る各記録機能のプログラムをコンピュータ読み取り可能な記録媒体としてＲＯＭに格納した場合を示したが、そのプログラムを光ディスク等の記録媒体に記憶するようにすれば、その記録媒体を介して光ディスク装置に直接インストールしたり、光ディスク装置に接続されたホストコンピュータから光ディスク装置にインストールしたり、ホストコンピュータにインストールして光ディスク装置を制御するようにしたりすることができ、この発明に係る記録機能のプログラムを容易に広く配布することができる。
【０１３０】
【発明の効果】
以上説明してきたように、この発明の情報記録装置と情報記録方法によれば、記録媒体へのデータ記録の際の交替処理を行わないようにしてデータが正しく記録できる確率を高めることができる。また、この発明のプログラムによれば、コンピュータにこの発明に係る機能を容易に実現させることができる。さらに、この発明のコンピュータ読み取り可能な記録媒体によれば、コンピュータに実行させるプログラムを容易に広く配布することができる。
【図面の簡単な説明】
【図１】この発明の一実施形態である光ディスク装置の構成を示すブロック図である。
【図２】データの書き換えが可能な光ディスク１におけるデータの記録パルス幅の形状の一例を示す波形図である。
【図３】この光ディスク装置における第１の記録処理を示すフローチャート図である。
【図４】この光ディスク記録装置における第３の記録処理を示すフローチャート図である。
【図５】この光ディスク記録装置における第４の記録処理を示すフローチャート図である。
【図６】この光ディスク記録装置における第５の記録処理を示すフローチャート図である。
【図７】この光ディスク記録装置における第６の記録処理を示すフローチャート図である。
【図８】この光ディスク記録装置における第７の記録処理を示すフローチャート図である。
【符号の説明】
１：光ディスク　　　　　２：スピンドルモータ
３：光ピックアップ　　　４：モータドライバ
５：レーザコントローラ　６：リードアンプ（ＲＦアンプ）
７：ＣＤエンコーダ　　　８：ＣＤデコーダ
９：サーボ部　　　　　　１０：ＣＤ−ＲＯＭエンコーダ
１１：バッファＲＡＭ（バッファメモリ）
１２：ＣＤ−ＲＯＭデコーダ
１３：バッファマネージャ
１４：ＲＯＭ　　　　　　１５：ＣＰＵ
１６：ＲＡＭ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to information recording for repeatedly recording data on a rewritable recording medium using a laser beam, such as a CD-R / RW drive, a DVD-R / RW drive, a DVD + R / RW drive, a DVD-RAM drive, and a DVD + RAM drive. The present invention relates to an apparatus, an information recording method, a program, and a computer-readable recording medium on which the program is recorded.
[0002]
[Prior art]
In an information recording device such as an optical information recording / reproducing device that records data on an optical disk (recording medium), the recorded data is reproduced, and even if an error correction code added to the data is used, the data is corrected to correct data. In the case where there is an impossible recording error, a system has been introduced which performs a replacement process for recording the data in a replacement area provided in the optical disc. According to such a system, data can be correctly recorded on the optical disc, and the reliability of the data recorded on the optical disc can be improved.
However, when the above-described replacement processing is performed, data is recorded over the original recording area and the replacement area, so that there is a problem that it takes time to read data during data reproduction.
[0003]
Among optical disks, in the case of an optical disk (recording medium) on which data can be rewritten, an optical disk device that records and reproduces data on the optical disk reproduces data after recording the data in a recording area of the optical disk, and records based on the reproduced data. When an error occurs, it is general to re-record (retry recording) data to be recorded again in the same recording area.
If a recording error occurs even after performing retry recording several times, the process proceeds to a replacement process for writing data in a replacement area provided on a data rewritable optical disk.
[0004]
With such a rewritable optical disc, if data can be recorded correctly by retry recording, data can be stored in a continuous recording area without using a spare area, and the problem of taking time to read data is solved. can do. Therefore, it is necessary to increase the probability that data can be correctly recorded by retry recording.
[0005]
A conventional information recording apparatus that records data on a data rewritable optical disk reproduces the data after recording the data on the optical disk, measures an error rate of the reproduced data, and the error rate exceeds a reference value. In this case, by performing recording with a recording power larger than the default value at the time of data re-recording (retry recording), the probability that data can be correctly recorded by retry recording is increased (for example, see Patent Document 1).
[0006]
[Patent Document 1]
JP-A-11-154330
[0007]
[Problems to be solved by the invention]
However, in the conventional information recording apparatus described above, if the recording power is increased during retry recording, the life of the pickup device that irradiates the laser beam is shortened, and the recording surface of the recording medium is deteriorated. Since the upper limit value is determined, the recording power cannot be increased without limit until the data is correctly recorded, and the retry recording cannot be performed, and there is a problem that the probability that the data can be correctly recorded does not increase.
[0008]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to increase the probability that data can be correctly recorded by not performing replacement processing when recording data on a recording medium.
[0009]
[Means for Solving the Problems]
The present invention provides the following information recording devices (1) to (5) to achieve the above object.
(1) Recording means for recording data by irradiating a recording area of a recording medium on which data can be rewritten with laser light, reproducing the data recorded by the recording means, and performing the recording based on the reproduced data. Judging means for judging whether or not the data was correctly recorded in the area; and when judging that the data could not be correctly recorded by the judging means, the head recording pulse width of the recording pulse width of the data in the recording area was set immediately before The data is re-recorded with a different pulse width from the time when the data was recorded, and the re-recorded data is reproduced. Based on the reproduced data, it is determined whether or not the re-recorded data has been correctly recorded in the recording area. The re-recording means for performing the determining operation a predetermined number of times, and it is determined that the recording was not correctly performed even after the re-recording means re-recorded the predetermined number of times. , The information recording apparatus provided with a replacement recording means for recording the data in the spare area provided in the recording medium.
[0010]
(2) In the information recording apparatus of (1), whether or not data can be correctly recorded in the recording area based on the number of data that cannot be correctly corrected even if an error correction code is used for the reproduced data. Means for judging, and when it is judged that the data can be correctly recorded in the recording area, the re-recording of the data by the re-recording means is repeated. An information recording apparatus in which when the judgment is made, the data is recorded in the replacement area by the replacement recording means.
(3) In the information recording apparatus according to (1) or (2), when re-recording the predetermined number of times, after the preset number of times of the predetermined number of times, information for changing the amount by which the pulse width is changed is changed. Recording device.
(4) In the information recording apparatus of (1) or (2), when the number of re-recordings performed during the previous recording is equal to or more than a predetermined number, the first recording pulse of the recording pulse width of the data recorded by the recording means An information recording apparatus in which the data is recorded with a pulse width different from an initial value.
[0011]
(5) Recording means for recording data by irradiating a recording area of a rewritable data recording medium with a laser beam, reproducing the data recorded by the recording means, and performing the recording based on the reproduced data. Determining means for determining whether or not the data has been correctly recorded in the area; and when the determining means determines that the data has not been correctly recorded, the recording power of the laser light is higher than the recording power at the time of immediately preceding recording. Re-recording the data in the recording area, reproducing the re-recorded data, and determining whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data. A first re-recording means for performing a predetermined number of times, and judging that the first re-recording means failed to record correctly even after re-recording a predetermined number of times; When re-recording the data with a pulse width different from the time immediately before the head recording pulse width of the recording pulse width of the data in the recording area, the reproduced data is reproduced, and the reproduced data is reproduced. A second re-recording means for performing an operation of determining whether the re-recorded data has been correctly recorded in the recording area based on the data a predetermined number of times, and re-recording the predetermined number of times by the second re-recording means; An information recording apparatus comprising: a replacement recording unit that records the data in a replacement area provided in the recording medium when it is determined that the data cannot be correctly recorded.
[0012]
Also, the following information recording methods (6) and (7) are provided.
(6) Data is recorded by irradiating a laser beam to a recording area of a recording medium on which data can be rewritten, the recorded data is reproduced, and the data is correctly written to the recording area based on the reproduced data. It is determined whether or not the recording was successful, and if the data could not be correctly recorded by the determination, the data having a different pulse width from the immediately preceding recording pulse width of the recording pulse width of the data in the recording area was recorded. Is re-recorded, the re-recorded data is reproduced, and based on the reproduced data, an operation of determining whether or not the re-recorded data has been correctly recorded in the recording area is performed a predetermined number of times. An information recording method for recording the data in a spare area provided in the recording medium when it is determined that the recording was not correctly performed even after recording.
[0013]
(7) Data is recorded by irradiating a laser beam to a recording area of a rewritable recording medium, the recorded data is reproduced, and the data is correctly written to the recording area based on the reproduced data. It is determined whether or not the recording was successful, and when the recording was not correctly performed by the determination, the recording power of the laser light was set to a power higher than the recording power at the time of immediately preceding recording, and the data was re-recorded in the recording area. Reproducing the re-recorded data, performing a predetermined number of operations to determine whether the re-recorded data has been correctly recorded in the recording area based on the reproduced data, and re-recording the predetermined number of times. When it is determined that the data could not be recorded correctly, the recording pulse width of the data in the recording area is different from that immediately before when the first recording pulse width was recorded. A predetermined number of times of re-recording the data with a pulse width that is equal to, reproducing the re-recorded data, and judging whether or not the re-recorded data was correctly recorded in the recording area based on the reproduced data. An information recording method for recording the data in a spare area provided in the recording medium when it is determined that the recording has not been correctly performed even after the re-recording the predetermined number of times.
[0014]
Furthermore, the following programs (8) and (9) are also provided.
(8) A recording procedure of recording data by irradiating a computer with a laser beam on a recording area of a rewritable recording medium, reproducing the data recorded by the recording procedure, and executing the recording based on the reproduced data. A determination procedure for determining whether or not the data has been correctly recorded in the recording area, and when it is determined that the data has not been correctly recorded by the determination procedure, a first recording pulse of the recording pulse width of the data in the recording area. The data is re-recorded with a pulse width different from the last recorded width, the re-recorded data is reproduced, and based on the reproduced data, the re-recorded data is correctly recorded in the recording area. A re-recording procedure in which the operation of judging whether or not the re-recording is performed a predetermined number of times, and whether the recording is not correctly performed even if the re-recording procedure re-records the predetermined number of times When it is determined that a program for executing the replacement recording procedure for recording the data in the spare area provided in the recording medium.
[0015]
(9) A recording procedure of recording data by irradiating a computer with a laser beam on a recording area of a rewritable recording medium, reproducing the data recorded by the recording procedure, and executing the recording on the basis of the reproduced data. A determination procedure for determining whether or not the data has been correctly recorded in the recording area, and when it is determined that the recording has not been correctly performed by the determination procedure, the recording power of the laser light is calculated from the recording power at the time of immediately preceding recording. And re-record the data in the recording area with a larger power, reproduce the re-recorded data, and determine whether the re-recorded data has been correctly recorded in the recording area based on the reproduced data. Re-recording procedure for performing a predetermined number of operations, and correct recording can be performed even after re-recording a predetermined number of times by the first re-recording procedure. When it is determined that the recording has been completed, the data is re-recorded with a different pulse width from the immediately preceding recording pulse width of the recording pulse width of the data in the recording area, and the re-recorded data is reproduced. A second re-recording procedure for performing a predetermined number of operations to determine whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data; A program for executing a replacement recording procedure of recording the data in a replacement area provided in the recording medium when it is determined that the data cannot be correctly recorded even after re-recording.
[0016]
Further, the following information recording devices (10) to (13) are also provided.
(10) Recording means for recording data by irradiating a recording area of a data rewritable recording medium with a laser beam, reproducing the data recorded by the recording means, and performing the recording based on the reproduced data. First determining means for determining whether or not the data has been correctly recorded in the area; and determining, by the first determining means, that the data has not been correctly recorded, the recording pulse width of the recording pulse width of the data in the recording area. The above data is re-recorded with a pulse width different from the last recording pulse width recorded immediately before, the re-recorded data is reproduced, and the data that could not be corrected correctly using the error correction code of the reproduced data The re-recorded data is stored in the recording area on the basis of whether the number has increased beyond the number of data that could not be correctly corrected when recorded immediately before. A re-recording means for performing a predetermined number of operations to determine whether or not the recording has been properly performed; and a replacement area provided in the recording medium when it is determined that the re-recording means has failed to correctly record even after re-recording the predetermined number of times. Replacement recording means for recording the data, and the data reproduced by the re-recording means at the time of re-recording by the re-recording means, based on the number of data which could not be correctly corrected by using an error correction code for the reproduced data. Determining whether the re-recording is repeated or whether the data is to be recorded in the replacement area by the replacement recording means, and based on the determination result of the second determination means, An information recording device comprising means for switching between re-recording and recording the data in the spare area by the spare recording means.
[0017]
(11) Recording means for recording data by irradiating a recording area of a rewritable data recording medium with a laser beam, reproducing the data recorded by the recording means, and performing the recording based on the reproduced data. Judging means for judging whether or not the data was correctly recorded in the area; and when judging that the data could not be correctly recorded by the judging means, the head recording pulse width of the recording pulse width of the data in the recording area was set immediately before The data is re-recorded with a different pulse width from the time when the data was recorded, and the re-recorded data is reproduced. Based on the reproduced data, it is determined whether or not the re-recorded data has been correctly recorded in the recording area. A re-recording means for performing an operation of judging a predetermined number of times, and a head recording pattern of data which has been re-recorded a predetermined number of times and correctly recorded by the re-recording means. A maximum head recording pulse width storing means for storing a maximum head recording pulse width which is a maximum value of the data width, and when data is recorded in a recording area of a rewritable recording medium by the recording means, The recorded data is reproduced, and it is determined whether or not the data has been correctly recorded based on the reproduced data. When it is determined that the data cannot be correctly recorded, the leading part of the recording pulse width of the data is determined. An operation of re-recording the data with a pulse width different from the immediately preceding recording pulse width is performed a predetermined number of times, and within the predetermined number of operations, the head recording pulse width of the data to be re-recorded is the maximum head width. When the recording pulse width becomes equal to or larger than the maximum head recording pulse width stored in the recording pulse width storage means, the data is recorded in a spare area provided in the recording medium. Information recording apparatus provided with a replacement recording unit.
[0018]
(12) In the information recording apparatus of (11), means for storing the recording speed and the type of recording medium at that time together with the maximum head recording pulse width and keeping the same even after the power of the apparatus itself is turned off or reset. Information recording device provided.
(13) In the information recording apparatus of (11), after the power of the apparatus itself is cut off or reset, data is recorded by irradiating a recording area of a rewritable recording medium with laser light, and the recorded data is recorded. The data is reproduced, and it is determined whether or not the data has been correctly recorded based on the reproduced data. When it is determined that the data cannot be correctly recorded, the leading recording pulse width of the recording pulse width of the data is determined. Is performed a predetermined number of times to re-record the data with a pulse width different from that immediately before recording, and within the predetermined number of operations, the top recording pulse width of the data to be re-recorded is the maximum top recording pulse width Means for recording the data in a spare area provided in the recording medium when the pulse width becomes equal to or larger than the maximum head recording pulse width stored in the storage means. It provided the information recording device.
[0019]
Further, the following information recording methods (14) and (15) are also provided.
(14) The data is recorded by irradiating the recording area of the recording medium on which data can be rewritten with a laser beam, the recorded data is reproduced, and the data is correctly stored in the recording area based on the reproduced data. It is determined whether or not the recording was successful, and if the data could not be correctly recorded by the determination, the data having a different pulse width from the immediately preceding recording pulse width of the recording pulse width of the data in the recording area was recorded. And replay the re-recorded data, and the number of data that could not be corrected correctly using the error correction code of the reproduced data was greater than the number of data that could not be correctly corrected at the last recording. An operation for determining whether or not the re-recorded data has been correctly recorded in the recording area is performed a predetermined number of times based on whether or not the If it is determined that the data could not be recorded correctly even after recording, the data is recorded in a replacement area provided in the recording medium, and the reproduced data is correctly corrected even when an error correction code is used for the reproduced data at the time of re-recording. Determine whether to repeat the data re-recording based on the number of failed data or whether to record the data in the replacement area, and repeat the data re-recording based on the determination result or whether to repeat the data re-recording in the replacement area. An information recording method that switches whether to record data.
[0020]
(15) The data is recorded by irradiating a laser beam to a recording area of a recording medium on which data can be rewritten, the recorded data is reproduced, and the data is correctly recorded in the recording area based on the reproduced data. It is determined whether or not the recording was successful, and when it was determined that the recording was not correctly performed by the determination, the first recording pulse width of the recording pulse width of the data in the recording area was set to a pulse width different from that immediately before recording. The data is re-recorded, the re-recorded data is reproduced, and an operation of determining whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data is performed a predetermined number of times. The maximum recording pulse width, which is the maximum value of the recording pulse widths of the recording data that was correctly recorded after re-recording the number of times, is stored. When data is recorded in a recording area of a recordable medium, the recorded data is reproduced, and it is determined whether or not the data has been correctly recorded based on the reproduced data. When it is determined that the first recording pulse width of the data recording pulse width is different from the immediately preceding recording pulse width, the data is re-recorded a predetermined number of times. An information recording method for recording the data in a spare area provided in the recording medium, when a head recording pulse width of the data to be re-recorded becomes equal to or larger than the stored maximum head recording pulse width.
[0021]
The following programs (16) and (17) are also provided.
(16) A recording procedure for recording data by irradiating a computer with a laser beam onto a recording area of a rewritable data recording medium, reproducing the data recorded by the recording procedure, and using the reproduced data. A first determination procedure for determining whether or not the data has been correctly recorded in the recording area, and when it is determined that the data has not been correctly recorded by the first determination procedure, a recording pulse width of the data in the recording area. Of the first recording pulse width, the above data was re-recorded with a pulse width different from the one recorded immediately before, the re-recorded data was reproduced, and the reproduced data could be correctly corrected even using the error correction code. The re-recorded data based on whether or not the number of uncorrected data has increased from the number of data that could not be corrected correctly when recorded immediately before A re-recording procedure for performing a predetermined number of operations to determine whether or not the recording has been correctly performed in the recording area; A replacement recording procedure for recording the data in the replacement area obtained, and the re-recording based on the number of data that could not be correctly corrected by using the error correction code for the reproduced data at the time of re-recording by the re-recording procedure. A second determining procedure for determining whether to repeat re-recording of data by a recording procedure or to record the data in the replacement area by the replacement recording procedure, and the re-recording based on a determination result of the second determining procedure; Switching between re-recording of data according to a procedure and recording of the data in the replacement area by the replacement recording procedure. Because of the program.
[0022]
(17) A recording procedure for recording data by irradiating a computer with a laser beam on a recording area of a rewritable data recording medium, and reproducing the data recorded by the recording procedure, based on the reproduced data. A determination procedure for determining whether or not the data has been correctly recorded in the recording area, and when it is determined that the data has not been correctly recorded by the determination procedure, a first recording pulse of the recording pulse width of the data in the recording area. The data is re-recorded with a pulse width different from the last recorded width, the re-recorded data is reproduced, and based on the reproduced data, the re-recorded data is correctly recorded in the recording area. A re-recording procedure in which the operation of judging whether or not the data has been recorded a predetermined number of times, A maximum head recording pulse width storing procedure for storing the maximum head recording pulse width which is the maximum value of the head recording pulse width of the data, and then storing the data in a recording area of a recording medium in which data can be rewritten by the above recording procedure. At the time of recording, the recorded data is reproduced, and it is determined whether or not the data has been correctly recorded based on the reproduced data. The operation of re-recording the data with a pulse width different from the immediately preceding recording pulse width is performed a predetermined number of times, and the head recording pulse width of the data to be re-recorded during the predetermined number of operations Is larger than the maximum head recording pulse width stored in the maximum head recording pulse width storage procedure, the replacement area provided in the recording medium is changed. Program for executing a replacement recording procedure for recording the data to.
[0023]
Further, the following recording medium (18) is also provided.
(18) A computer-readable recording medium in which any one of the above (8), (9), (16) and (17) is recorded.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of an optical disk device according to an embodiment of the present invention.
The optical disk device for recording and reproducing data on and from the optical disk to which the present invention is applied is not limited to the optical disk device of this embodiment, but is not limited to an optical disk as long as it is a rewritable recording medium. It can also be applied to an apparatus that records and reproduces data on an optical recording medium such as.
[0025]
The optical disk device (optical disk drive) includes a spindle motor 2, an optical pickup 3, a motor driver 4, a laser controller 5, a read amplifier (RF amplifier) 6, a CD encoder 7, a CD decoder 8, a servo unit 9, and a CD-ROM encoder 10. , A buffer RAM (buffer memory) 11, a CD-ROM decoder 12, a buffer manager 13, a ROM 14, a CPU 15, and a RAM 16.
The line with an arrow shown in the figure indicates the direction in which data mainly flows between each unit (each block). In order to simplify the figure, only the thick line with an arrow is given to the CPU 15 that controls each unit. The illustration of the connection with each block is omitted.
The ROM 14 stores a control program described in a code decipherable by the CPU 15. When the power of the optical disk device is turned on, the control program in the ROM 14 is loaded into a well-known main memory (not shown), and the CPU 15 controls the operation of each unit according to the control program. Is temporarily stored in the RAM 16.
[0026]
Next, an outline of a basic operation of the optical disk device will be described.
This optical disk device is characterized in that information of a recording pulse width of data to be recorded on the optical disk 1 is stored in a RAM 16, and the information of the recording pulse width is changed to perform a re-recording operation (retry recording operation) according to the present invention. And
In this optical disc apparatus, a spindle motor 2 rotationally drives a disc 1, which is a rewritable recording medium light using a laser beam, such as a CD-RW disc, a DVD-RW disc, a DVD + RW disc, a DVD-RAM disc, a DVD + RAM disc. . The motor driver 4 and the servo unit 9 control the spindle motor 2 so that the linear speed or the rotational speed is constant.
[0027]
The optical pickup 3 incorporates a well-known semiconductor laser light source, an optical system, a focus actuator, a track actuator, a light receiving element, and a position sensor, not shown, and irradiates the optical disc 1 with laser light L. Further, the optical pickup 3 is controlled by the motor driver 4 and the servo unit 9 so that the spot of the laser light L is located at a target location (recording location) on the optical disc 1.
[0028]
When reproducing (reading) the data recorded on the optical disc 1, the RF amplifier 6 amplifies and binarizes the reproduction signal obtained by the optical pickup 3, and then inputs the signal to the CD decoder 8. The CD decoder 8 demodulates the binarized data input from the RF amplifier 6 into EFM (Eight to Fourteen Modulation) and outputs the demodulated data to the CD-ROM decoder 12. The CD-ROM decoder 12 performs error correction processing on the data demodulated by the CD decoder 8, and the buffer manager 13 temporarily stores the data on which the error correction processing has been performed in the buffer RAM 11.
[0029]
When recording (writing) data on the optical disk 1, data sent from the host computer through an ATAPI / SCSI interface (not shown) is temporarily stored in the buffer RAM 11 by the buffer manager 13. Then, with a certain amount of data accumulated in the buffer RAM 11, the write operation is started. In the write operation, the CD-ROM encoder 10 or the CD encoder 7 adds an error correction code to the data in the buffer RAM 11 and records the data on the optical disk 1 via the laser controller 5 and the optical pickup 3.
[0030]
FIG. 2 is a waveform diagram showing an example of the shape of the recording pulse width of data on the optical disk 1 on which data can be rewritten.
The data recording pulse is formed from a head pulse having one recording pulse width D1 and an intermediate pulse having one or a plurality of recording pulse widths D2 (three pulses are shown in the figure). On the other hand, there are three types of recording power levels, Pr, P1, and P2.
In this optical disc apparatus, when data is recorded on the optical disc 1, the recording pulse width of the first pulse of the data is made wider than usual, thereby improving the quality of overwriting.
[0031]
(1) First recording function according to the present invention in this optical disk device
In order to realize the first recording function, a recording procedure of recording data by irradiating a laser beam to a recording area of a rewritable recording medium on a ROM 14 or a RAM 16 of a CPU 15 of an optical disc apparatus, and a recording procedure for recording the data. When the data recorded by the procedure is reproduced, a judgment procedure for judging whether or not the data has been correctly recorded in the recording area based on the reproduced data, and when it is judged that the recording was not correctly performed by the judgment procedure, The data is re-recorded with a different pulse width from the immediately preceding recording pulse width of the recording pulse width of the data in the recording area, and the re-recorded data is reproduced. Based on the reproduced data, Performing a predetermined number of operations to determine whether the re-recorded data has been correctly recorded in the recording area. And a program for executing a replacement recording procedure for recording the data in a replacement area provided in the recording medium when it is determined that the data cannot be correctly recorded even after re-recording a predetermined number of times by the re-recording procedure. Is installed (executably stored by the CPU).
[0032]
When the CPU 15 executes the program, data is recorded by irradiating the recording area of the data rewritable recording medium with a laser beam, the recorded data is reproduced, and based on the reproduced data. It is determined whether or not the data has been correctly recorded in the recording area, and when the data could not be correctly recorded by the determination, the first recording pulse width of the recording pulse width of the data was recorded immediately before in the recording area. An operation of re-recording the data with a different pulse width, reproducing the re-recorded data, and determining whether the re-recorded data has been correctly recorded in the recording area based on the reproduced data. Is performed a predetermined number of times, and if it is determined that the recording has not been performed correctly even after the re-recording the predetermined number of times, the replacement provided in the recording medium Performs a recording process for recording the data on the frequency.
[0033]
That is, the CPU 15 or the like irradiates a recording area of a rewritable recording medium with laser light to record data, and reproduces the data recorded by the recording means. A determining means for determining whether or not the data has been correctly recorded in the recording area based on the data, and when the determining means determines that the data has not been correctly recorded, the first recording of the recording pulse width of the data in the recording area is performed. The data is re-recorded with a pulse width different from the pulse width recorded immediately before, the re-recorded data is reproduced, and based on the reproduced data, the re-recorded data can be correctly recorded in the recording area. Re-recording means for performing the operation of determining whether or not the recording has been performed a predetermined number of times; When it is determined that no come, serve replacement recording means for recording the data in the spare area provided in the recording medium.
[0034]
Next, the operation of the first recording function will be described with reference to the flowchart shown in FIG.
FIG. 3 is a flowchart showing a first recording process in the optical disc device.
In the first recording process, the CPU 15 sets an initial value in step (indicated by “S” in the figure) 1. In the setting of the initial value, the retry recording number (rewriting number) X is set to 0 as an initial value for counting the number of rewriting times when data cannot be correctly recorded. The initial recording pulse width D is set to a default value (initial value) D0 for making it different from the immediately preceding recording.
In step 2, by irradiating the optical disk with laser light from the optical pickup, first, data is recorded in the recording area designated as the recording destination of the optical disk with the initial recording pulse width D being the default value D0.
[0035]
Next, in step 3, the recorded data is reproduced, and a reproduced signal of an area where data is recorded with the default recording value D0 from the optical pickup to the optical disk is obtained from the optical pickup, and is amplified by an RF amplifier and binarized. The EFM demodulation is performed by the CD decoder, the error correction is performed by the CD-ROM decoder, and it is determined whether or not the data is correctly recorded by determining whether or not there is a recording error in step 4.
If it is determined in step 4 that the data is correctly recorded without a recording error, that is, if there is no need for error correction, or if all data has been correctly corrected by error correction, the data has been correctly recorded. End the data recording or continue recording the next data.
[0036]
On the other hand, if it is determined in step 4 that the data could not be correctly recorded due to the presence of a recording error, that is, if there was data that could not be correctly corrected by using the error correction code, it is determined that the data could not be correctly recorded. In step 5, it is determined whether or not the number of retry recordings X has become equal to or greater than a predetermined number of times (maximum number of retry recordings) XMAX.
[0037]
If it is determined in step 5 that the number of retry recordings X is less than the predetermined number of times XMAX set in advance, the process proceeds to step 7 and 1 is added to the number of retry recordings when X = X + 1. By adding the predetermined recording pulse width α to the recording pulse width D and setting the head recording pulse width at the time of retry recording to D + α, returning to step 2 and irradiating the optical disk with laser light from the optical pickup, the head recording pulse width is reduced. Data is retried and recorded by D + α, and the recorded data is reproduced in Step 3 to obtain a reproduction signal in the area where the data is recorded by D + α on the optical disk from the optical pickup with the first recording pulse width, and after amplification by an RF amplifier, 2 Value, EFM demodulate with a CD decoder, and perform error correction with a CD-ROM decoder. Determining whether data is recorded correctly by determining whether no error.
[0038]
In this way, in Steps 1 to 4, data with the initial recording pulse width D set to the default value D0 is first recorded in the recording area of the recording destination of the optical disk 1, and the recorded data is reproduced. Then, it is determined whether or not the data has been correctly recorded in the recording area. If the recording cannot be correctly performed by the judgment, the predetermined recording pulse width α is added to the leading recording pulse width D of the recording pulse width of the immediately preceding data in steps 2 to 4, step 5 and steps 7 to 8, and Re-recording the data with a different pulse width than when recording the data, reproduce the re-recorded data, and determine whether the re-recorded data has been correctly recorded in the recording area based on the reproduced data. The operation is performed XMAX a predetermined number of times.
[0039]
That is, by changing the information of the recording pulse width stored in the RAM 16, the retry recording is performed by setting the recording pulse width D at the time of the immediately preceding recording wider by the predetermined recording pulse width α. If retry recording is performed and the recording data does not generate a recording error that cannot be corrected even by using an error correction code, the recording is terminated or the recording of the next data is continued. Retry recording is performed by setting the recording pulse width α wide. This sequence of processing is repeated, and if the number of retry recordings reaches a predetermined maximum number of recordings XMAX, the processing shifts to the replacement processing.
[0040]
Therefore, the head recording pulse width D of the data is increased by the predetermined recording pulse width α at each retry recording (the head recording pulse width is the default value D0 + α in the first retry recording, and the head recording pulse width is the default value in the second retry recording. In the default value D0 + 2α,..., N-th retry recording, the head recording pulse width is re-recorded with the default value D0 + nα (n is a positive integer).
If it is determined in step 5 that the number of retry recordings X is equal to or more than the predetermined number of times XMAX set in advance, that is, it is determined that the data could not be correctly recorded even if the recording area XMAX was re-recorded the predetermined number of times. At this time, the process proceeds to step 6 to perform a recording process (replacement process) for recording data in a replacement area provided in the optical disc.
[0041]
Generally, there are various causes of a recording error occurring in an optical disk device. Among them, there is a cause that a recording power is low at the time of overwriting, so that an unerased part is left. Therefore, it is conceivable to increase the recording power in order not to cause the unerased portion, but it is not possible to increase the recording power indefinitely because the life of the pickup device for irradiating the laser beam is shortened.
The first recording function of the optical disk device of this embodiment is to record with a wider initial recording pulse width of data than a default value instead of increasing the recording power at the time of retry recording. Therefore, the same effect as increasing the recording power can be obtained, the probability that data can be correctly recorded by retry recording can be increased, and data can be overwritten correctly on the optical disk.
[0042]
(2) Second recording function according to the present invention in this optical disk device
In the above-described first recording function, retry recording is performed several times until data is correctly recorded. However, if the number of retry recordings is large, there is a problem that the recording time becomes long. In the case where a defect that is not correctly recorded in the recording area occurs a plurality of times, it is necessary to perform the retry recording for the second and subsequent times with the number of retry recordings as small as possible.
Retry recording is performed several times until data is correctly recorded. However, if the number of retry recordings is large, there is a problem that the recording time becomes long.
Retry recording, which has a high possibility of not being able to record correctly, increases the recording time, so it is necessary not to execute it.
Therefore, in the second recording function, the number of times of retry recording is reduced.
[0043]
In order to realize the second recording function, whether or not data can be correctly recorded in the recording area based on the number of data that cannot be correctly corrected by using the error correction code for the reproduced data in the program. A procedure for judging whether or not the data is correctly recorded in the recording area by the procedure is repeated to re-record the data in the re-recording procedure, and the data is correctly recorded in the recording area. If it is determined that the replacement is not possible, a procedure for recording the data in the replacement area by the replacement recording procedure is added, and the CPU 15 and the like also execute the procedure, thereby realizing the second recording function.
[0044]
Next, the operation of the second recording function will be described with reference to the flowchart shown in FIG.
In the second recording process, the CPU 15 determines whether or not the number of retry recordings X has become equal to or greater than a predetermined number of times (maximum number of retry recordings) XMAX in the process of step 5 in the same manner as the above-described process. Further, it is also determined whether or not data can be correctly recorded in the recording area based on the number of data that cannot be correctly corrected by using the error correction code for the reproduced data.
[0045]
As described above, in determining whether or not to shift to the above-described replacement processing, it is determined whether or not the number of retry recordings X has become equal to or greater than a predetermined number of times (maximum number of retry recordings) XMAX. It is determined whether or not the number of data (recording error number) that cannot be correctly corrected even with the use of the correction code is equal to or greater than a predetermined reference value, and whether to repeat retry recording or shift to replacement processing is determined based on both determinations. The number of recording errors serving as the criterion value may be set to a fixed number in advance, or the number of recording errors may be changed depending on the number of times of retry recording.
For example, if the number of retry recordings is two or more, there is a recording error, and if the number of recording errors is less than the criterion value, the retry recording is repeated by changing the leading recording pulse width, and the number of recording errors is greater than the criterion value. In such a case, the process immediately shifts to the replacement process.
[0046]
The second recording function of the optical disk device of this embodiment is to record the same data in the same area as the number of recording errors that could not be corrected to the correct data by using the error correction code of the reproduced data. Focusing on the fact that there is a high possibility that recording cannot be performed correctly, the number of retry recordings that cannot be recorded correctly can be reduced by judging whether to repeat retry recording or shift to recording in the replacement area based on the number of recording errors. Thus, the recording time can be shortened.
[0047]
(3) Third recording function according to the present invention in this optical disk recording apparatus
In the third recording function, the number of retry recordings is reduced by a method different from the above-described second recording function.
In order to realize the third recording function, a procedure has been added to the program in which, when re-recording the predetermined number of times, the amount by which the pulse width is changed after a preset number of times within the predetermined number of times is changed. The third recording function is realized by the CPU 15 and the like also executing the procedure.
[0048]
Next, the operation of the third recording function will be described with reference to the flowchart shown in FIG.
FIG. 4 is a flowchart showing a third recording process in the optical disc recording apparatus.
In the third recording process, the CPU 15 determines in step (indicated by “S” in the figure) 11 whether or not the first data is to be written, and if it is not the first data to be written (records the first data). Proceeding to step 13, if the first data is to be written, the number N of occurrences of retry recording is set to an initial value “0” before data recording in step 12, and the process proceeds to step 13. The number N of times of retry recording is a count value for determining the timing of changing the amount by which the pulse width of the head recording pulse width is changed.
[0049]
At step 13, an initial value is set. In the setting of the initial value, the retry recording number (rewriting number) X is set to 0 as an initial value for counting the number of rewriting times when data cannot be correctly recorded. The initial recording pulse width D is set to a default value (initial value) D0 for making it different from the immediately preceding recording.
By irradiating the optical disk with laser light from the optical pickup in step 14, first, data is recorded in the recording area designated as the recording destination of the optical disk with the initial recording pulse width D being the default value D0.
[0050]
Next, in step 15, the recorded data is reproduced, and a reproduced signal in the area where the data is recorded with the default value D0 from the optical pickup to the optical disc with the head recording pulse width D is obtained. The EFM demodulation is performed by the CD decoder, the error correction is performed by the CD-ROM decoder, and whether or not the data is correctly recorded is determined by determining whether or not there is a recording error in step 16.
[0051]
If it is determined in step 16 that the data has been correctly recorded without a recording error, that is, if there is no need for error correction, or if all the data has been correctly corrected by the error correction, the data has been correctly recorded. Then, the process proceeds to step 17 to determine whether or not the number of retry recordings X = 0. If the number of retry recordings X = 0, the data recording ends or the recording of the next data is continued. One is added to the number of times N of retry recording has occurred, and the result is stored in a memory such as a RAM as the number of times of retry recording in that recording area, and data recording ends or recording of the next data continues. The number of times of retry recording in each recording area of the optical disc is preferably recorded in a management area or a free area of the optical disc. Then, at the time of the next overwrite, the number of retry recording occurrences in the recording area of the recording destination is read out from the optical disc and set to record data.
[0052]
On the other hand, if it is determined in step 16 that the data could not be correctly recorded due to the presence of a recording error, that is, if there was data that could not be correctly corrected by using the error correction code, it was determined that the data could not be correctly recorded. In step 19, it is determined whether or not the number of retry recordings X has become equal to or greater than a predetermined number of times (maximum number of retry recordings) XMAX.
[0053]
If the number of times of retry recording X is smaller than the preset number of times XMAX determined in step 19, the process proceeds to step 21 to determine whether the number of times N of retry recording has occurred is 10 or more, and if not, the process proceeds to step 23. In step 24, 1 is added to the number of retry recordings when X = X + 1, and in step 24, a predetermined recording pulse width α is added to the first recording pulse width D of the data recorded immediately before, and the first recording pulse width when retry recording is performed. Is set to D + α, and the process returns to step 14 to irradiate the optical disk with laser light from the optical pickup, thereby retry-recording the data with the head recording pulse width of D + α, and reproducing the recorded data at step 15, The reproduction signal of the area where the data was recorded with the head recording pulse width of D + α was obtained and amplified by the RF amplifier. , EFM demodulation by a CD decoder, error correction processing by a CD-ROM decoder, and determination as to whether or not there is no recording error in step 16 to determine whether or not the data is correctly recorded. .
[0054]
On the other hand, if the number of retry recording occurrences N is 10 or more as determined in step 21, the predetermined recording pulse width α is added to the head recording pulse width D of the data recorded immediately before in step 22, and the process proceeds to step 23 to perform the retry recording number of times. When X = X + 1, 1 is added to the number of retry recordings, and in step 24, a predetermined recording pulse width α is further added to the head recording pulse width D of the data to set the head recording pulse width for retry recording to D + α. Returning, the optical pickup irradiates the optical disk with a laser beam, thereby retry-recording the data with a head recording pulse width of D + 2α, reproducing the recorded data in step 15, and setting the head recording pulse width to D + 2α from the optical pickup to the optical disk. To obtain a reproduced signal in the area where data is recorded, amplify it with an RF amplifier, binarize it, and EFM demodulation is performed by the decoder, error correction processing is performed by the CD-ROM decoder, and it is determined in step 16 whether or not there is no recording error, thereby determining whether or not the data is correctly recorded.
[0055]
In this way, in Steps 1 to 4, data with the initial recording pulse width D set to the default value D0 is first recorded in the recording area of the recording destination of the optical disk 1, and the recorded data is reproduced. Then, it is determined whether or not the data has been correctly recorded in the recording area. If the result of the determination indicates that the recording cannot be performed correctly, the retry recording count up to the ninth time is set to the first recording pulse width D of the immediately preceding data in steps 14 to 16, step 19, step 21, and steps 23 to 24. A predetermined recording pulse width α is added, the data is re-recorded with a pulse width different from that immediately before recording, the re-recorded data is reproduced, and the re-recorded data is recorded based on the reproduced data. An operation of determining whether or not recording has been correctly performed in the area is performed XMAX a predetermined number of times.
[0056]
Further, after the tenth retry recording, the predetermined recording pulse width α is doubled to the head recording pulse width D of the recording pulse width of the immediately preceding data in steps 14 to 16, step 19, and steps 21 to 24. 2α is added, the data is re-recorded with a pulse width different from the one recorded immediately before, the re-recorded data is reproduced, and the re-recorded data can be correctly recorded in the recording area based on the reproduced data. The operation of determining whether or not the operation has been performed is performed a predetermined number of times XMAX.
[0057]
Therefore, in the first to ninth retry recordings, the head recording pulse width D of the data is increased by a predetermined recording pulse width α each time (in the first retry recording, the head recording pulse width D is the default value D0 + α, the second time). In the retry recording, the head recording pulse width D is the default value D0 + 2α,..., In the ninth retry recording, the head recording pulse width D is the default value D0 + 9α), and the data is head-recorded each time from the tenth retry recording. The pulse width D is increased by a predetermined recording pulse width 2α from 9α (the first recording pulse width D is the default value D0 + 11α in the tenth retry recording, the head recording pulse width D is the default value D0 + 13α,... In the eleventh retry recording). , In the n-th retry recording, the head recording pulse width D is the default value D0 + (2n-9) α (n is 1 Or more positive integer)) re-recorded.
[0058]
On the other hand, if the number of retry recording occurrences N read from the optical disk is already 10 or more, the head recording pulse width D of the data is increased by a predetermined recording pulse width 2α each time in the processing of steps 21 to 24 (the 10th retry recording). , The first recording pulse width D is the default value D0 + 2α, the first recording pulse width D is the default value D0 + 4α,... In the eleventh retry recording, and the first recording pulse width D is the default value D0 + 2 (n−9) in the nth retry recording. A) Re-record.
If it is determined in step 19 that the number of retry recordings X is equal to or greater than the predetermined number of times XMAX set in advance, that is, it is determined that the data could not be correctly recorded even after the rerecording of the recording area of the optical disk for the predetermined number of times XMAX. At this time, the process proceeds to step 20 to perform a recording process (replacement process) for recording data in a replacement area provided in the optical disc.
[0059]
Alternatively, the following may be performed. First, data is recorded with the default value D0 of the head recording pulse width D, the recording area where the data is recorded is reproduced, and it is determined whether or not the data is recorded correctly. Here, unless a recording error occurs, it is determined that the recording has been correctly performed, and the recording is completed or the recording of the next information is continued.
On the other hand, when a recording error occurs during reproduction, if the number N of retry recording occurrences in the recording area is less than 10, the first recording pulse width D at the time of the first retry recording is set to the default value D0 and the predetermined recording pulse width α × The number of retry recording occurrences N is added. If the number of retry recordings is 10 or more, a predetermined recording pulse width 2α is added to the default value D0. Retry recording is performed, and if no recording error occurs, recording is completed or recording of the next data is continued. If a recording error occurs, retry recording is performed. This sequence of processing is repeated, and if the number of retry recordings reaches a predetermined maximum number of recordings XMAX, the processing shifts to the replacement processing.
[0060]
If a recording error has not occurred, it is determined whether or not retry recording has been performed in the recording area. The number of retry recordings is stored in the memory, and the recording is completed or the recording of the next information is continued.
The third recording function of the optical disc device of this embodiment is to change the head recording pulse width in the initial retry recording by changing the amount of change according to the number of retry recordings until the recording pulse width reaches an appropriate recording pulse width that can be correctly recorded. The number of times of retry recording can be reduced, and the recording time can be shortened.
[0061]
(4) Fourth recording function according to the present invention in this optical disk recording apparatus
In the fourth recording function, the number of retry recordings is reduced by a method different from the above-described second recording function and the third recording function.
In order to realize the fourth recording function, when the number of times of re-recording performed at the time of the previous recording is equal to or more than a predetermined number, the program includes a first recording pulse width among the recording pulse widths of data to be recorded by the recording procedure. A fourth recording function is realized by adding a procedure for recording the data with a pulse width different from the initial value, and executing the procedure with the CPU 15 or the like.
[0062]
Next, the operation of the fourth recording function will be described with reference to the flowchart shown in FIG.
FIG. 5 is a flowchart showing a fourth recording process in the optical disc recording apparatus.
In the fourth recording process, the CPU 15 determines in step (indicated by “S” in the figure) 31 whether or not the first data is to be written, and if it is not the first data to be written (recording the first data). The number of retry recording occurrences N in the recording area of the recording destination is read from the optical disk and set as an initial value, and the process proceeds to step 33. In the case of writing the first data, the value of the number of retry recording occurrences N is set at step 32 before data recording. Set to 0 and proceed to step 33. The number of times of retry recording is a count value for determining the timing of changing the amount by which the pulse width of the first recording pulse width is changed.
[0063]
In step 33, an initial value is set. In the setting of the initial value, the retry recording number (rewriting number) X is set to 0 as an initial value for counting the number of rewriting times when data cannot be correctly recorded. The initial recording pulse width D is set to a default value (initial value) D0 for making it different from the immediately preceding recording.
In step 34, it is determined whether or not the number of retry recording occurrences N is less than a predetermined number of predetermined times of ten. By adding a predetermined recording pulse width α to the width D to set the leading recording pulse width to D + α when recording data, and irradiating the optical disk with laser light from the optical pickup in step 35, the optical disk is first designated as a recording destination. The data is recorded in the recording area with the head recording pulse width set to D + α.
[0064]
Next, in step 36, the recorded data is reproduced, a reproduction signal of the area where the data is recorded with the head recording pulse width of D + α from the optical pickup is obtained from the optical pickup, amplified by the RF amplifier, binarized, and binarized. In step 37, error correction processing is performed by the CD-ROM decoder, and in step 37, it is determined whether or not there is no recording error, thereby determining whether or not the data is correctly recorded.
[0065]
If it is determined in step 37 that the data has been correctly recorded without a recording error, that is, if there is no need for error correction, or if all data has been correctly corrected by error correction, the data has been correctly recorded. Then, the process proceeds to step 38 to determine whether or not the number of retry recordings X = 0. If the number of retry recordings X = 0, the data recording is completed or the recording of the next data is continued. One is added to the number of times N of retry recording has occurred, and the result is stored in a memory such as a RAM as the number of times of retry recording in that recording area, and data recording ends or recording of the next data continues. The number of times of retry recording in each recording area of the optical disc is preferably recorded in a management area or a free area of the optical disc. Then, at the time of the next overwrite, the number of retry recording occurrences in the recording area of the recording destination is read out from the optical disc and set to record data.
[0066]
On the other hand, if it is determined in step 37 that the data could not be correctly recorded due to the recording error, that is, if there was data that could not be correctly corrected even by using the error correction code, it is determined that the data could not be correctly recorded. In step 41, it is determined whether or not the number of retry recordings X is equal to or greater than a predetermined number of times (maximum number of retry recordings) XMAX.
[0067]
If the number of times of retry recording X is smaller than the predetermined number of times XMAX set in advance in step 41, the process proceeds to step 43, where 1 is added to the number of times of retry recording at the time of retry recording X = X + 1. By adding a predetermined recording pulse width α to the recording pulse width D + α and setting the head recording pulse width at the time of retry recording to D + 2α, returning to step 35 and irradiating the optical disk with laser light from the optical pickup, the head recording pulse width is reduced. Data is retried and recorded at D + 2α, and the recorded data is reproduced at step 36 to obtain a reproduction signal of an area where data is recorded at D + 2α at the head recording pulse width from the optical pickup on the optical disk. Value, EFM demodulate with a CD decoder, and perform error correction processing with a CD-ROM decoder. In step 37, it is determined whether or not data is correctly recorded by determining whether or not there is a recording error.
[0068]
If the retry recording count X is equal to or greater than the preset predetermined count XMAX in the determination of step 41, that is, it is determined that the data could not be correctly recorded even if the XMAX was re-recorded the predetermined number of times in the recording area of the recording destination of the optical disc. At this time, the process proceeds to step 42 to perform a recording process (replacement process) for recording data in a replacement area provided in the optical disc.
On the other hand, if the number N of retry recording occurrences is less than the predetermined number of 10 in step 34, the number N of retry recording occurrences is set to 0 in step 35, and the optical pickup is irradiated with laser light from the optical pickup. The data is recorded in the recording area designated as the recording destination for the first recording pulse width D with the default value D0.
[0069]
Next, in step 36, the recorded data is reproduced, and a reproduced signal in the area where the data is recorded with the default recording value D0 from the optical pickup to the optical disk is obtained from the optical pickup, and is amplified by the RF amplifier and binarized. The EFM demodulation is performed by the CD decoder, the error correction process is performed by the CD-ROM decoder, and it is determined whether or not the data is correctly recorded by determining whether or not there is a recording error in step 37.
[0070]
If it is determined in step 37 that the data has been correctly recorded without a recording error, that is, if there is no need for error correction, or if all data has been correctly corrected by error correction, the data has been correctly recorded. Then, the process proceeds to step 38 to determine whether or not the number of retry recordings X = 0. If the number of retry recordings X = 0, the data recording is completed or the recording of the next data is continued. One is added to the number of times N of retry recording has occurred, and the result is stored in a memory such as a RAM as the number of times of retry recording in that recording area, and data recording ends or recording of the next data continues. The number of times of retry recording in each recording area of the optical disc is preferably recorded in a management area or a free area of the optical disc. Then, at the time of the next overwrite, the number of retry recording occurrences in the recording area of the recording destination is read out from the optical disc and set to record data.
[0071]
If it is determined in step 37 that the data could not be correctly recorded due to the recording error, that is, if there was data that could not be correctly corrected even by using the error correction code, it is determined that the data could not be correctly recorded. In step 41, it is determined whether or not the number of retry recordings X is equal to or greater than a predetermined number of times (maximum number of retry recordings) XMAX.
[0072]
If the number of times of retry recording X is smaller than the predetermined number of times XMAX set in advance in step 41, the process proceeds to step 43, where 1 is added to the number of times of retry recording at the time of retry recording X = X + 1. By adding a predetermined recording pulse width α to the recording pulse width D and setting the head recording pulse width at the time of retry recording to D + α, returning to step 35 and irradiating the optical disk with laser light from the optical pickup, the head recording pulse width is reduced. Data is retried and recorded at D + α, the recorded data is reproduced at step 36, and a reproduction signal of an area where the data is recorded at D + α at the head recording pulse width is obtained from the optical pickup on the optical disk, and amplified by an RF amplifier. Value, EFM demodulate with a CD decoder, perform error correction with a CD-ROM decoder, and Determining whether data is recorded correctly by determining whether no recording errors flop 37.
[0073]
If the number of retries X is equal to or more than the predetermined number of times XMAX determined in step 41, that is, if it is determined that the data could not be recorded correctly even after the predetermined number of times of XMAX re-recording in the recording area of the recording destination of the optical disk. Then, the process proceeds to step 42 to perform a recording process (replacement process) for recording data in a replacement area provided in the optical disc.
In this way, the head recording pulse width D is gradually increased from the default value D0 for each retry recording until the number of times of retry recording for the recording area of the recording destination of the optical disk 1 is 0 to 9 times. From the beginning, the leading recording pulse width D is increased from the beginning to D + α, and gradually increased from that value.
[0074]
Alternatively, the following may be performed. In the first recording before the retry recording occurs, the number of retry occurrences of the previous recording is checked. If the number N of retry recording occurrences is less than 10, the head pulse width at the time of the first recording is the default value D0, and if it is 10 or more, α is added to the default value D0 for recording. If the recording area is reproduced and no recording error occurs, the recording is terminated or the recording of the next data is continued, and if a recording error occurs, retry recording is performed. This sequence of processing is repeated, and if the number of retry recordings reaches a predetermined maximum number of recordings XMAX, the processing shifts to the replacement processing. If a recording error has not occurred, it is determined whether or not retry recording has been performed in that area. If retry recording has been performed, 1 is added to the number N of times of retry recording, and the end of data recording or the next data Continue recording.
[0075]
The fourth recording function of the optical disc device of this embodiment can reduce the frequency of retry recording by increasing the probability of correct recording in the first recording, thereby realizing a reduction in recording time. .
[0076]
(5) Fifth recording function according to the present invention in this optical disk recording apparatus
In the above-described first to fourth recording functions, the recording pulse width is optimally set by default, and when the pulse width is changed, the recording quality slightly deteriorates. Before performing the retry recording by changing the recording pulse width, it is necessary to perform the retry recording by means that does not degrade the recording quality.
Therefore, in the fifth recording function, retry recording is performed by means that does not lower the recording quality.
[0077]
In order to realize the fifth recording function, a recording procedure for recording data by irradiating a laser beam on a recording area of a rewritable recording medium on a ROM 14 or a RAM 16 of a CPU 15 of an optical disc apparatus, When the data recorded by the procedure is reproduced, a judgment procedure for judging whether or not the data has been correctly recorded in the recording area based on the reproduced data, and when it is judged that the recording was not correctly performed by the judgment procedure, The recording power of the laser beam is set to a power higher than the recording power at the time of the immediately preceding recording, the data is re-recorded in the recording area, the re-recorded data is reproduced, and the re-recording is performed based on the reproduced data. A first re-recording operation for performing a predetermined number of operations of determining whether or not the recorded data has been correctly recorded in the recording area. When it is determined that the data cannot be correctly recorded even after re-recording a predetermined number of times by the first re-recording procedure, when the first recording pulse width of the recording pulse width of the data is recorded immediately before in the recording area. Performs a predetermined operation of re-recording the data with a different pulse width, reproducing the re-recorded data, and determining whether the re-recorded data has been correctly recorded in the recording area based on the reproduced data. The second re-recording procedure performed a number of times, and when it is determined that the data cannot be correctly recorded even after re-recording a predetermined number of times by the second re-recording procedure, the data is recorded in a spare area provided in the recording medium. A program for executing the replacement recording procedure is installed (stored so as to be executable by the CPU).
[0078]
When the CPU 15 executes the program, data is recorded by irradiating the recording area of the data rewritable recording medium with a laser beam, the recorded data is reproduced, and based on the reproduced data. It is determined whether or not the data was correctly recorded in the recording area, and when the recording was not correctly performed by the determination, the recording power of the laser beam was set to a power larger than the recording power at the time of immediately preceding recording. Data is re-recorded in the recording area, the re-recorded data is reproduced, and an operation of determining whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data is performed a predetermined number of times. When it is determined that the data cannot be correctly recorded even after re-recording the predetermined number of times, the recording pulse width of the data is recorded in the recording area. The above-mentioned data is re-recorded with a pulse width different from that immediately before the first recording pulse width is recorded, the re-recorded data is reproduced, and the re-recorded data is recorded in the recording area based on the reproduced data. Performing a predetermined number of operations to determine whether or not the data has been correctly recorded on the recording medium, and when it is determined that the data has not been correctly recorded even after re-recording the predetermined number of times, recording the data in a spare area provided in the recording medium. Perform processing.
[0079]
That is, the CPU 15 or the like irradiates a recording area of a rewritable recording medium with laser light to record data, and reproduces the data recorded by the recording means. Determining means for determining whether or not the data has been correctly recorded in the recording area based on the recording power; and determining that the recording power has not been correctly recorded by the determining means, the recording power of the immediately preceding recording power of the laser light. Re-recording the data in the recording area with a power larger than that, reproducing the re-recorded data, and determining whether the re-recorded data was correctly recorded in the recording area based on the reproduced data. A first re-recording means for performing a judging operation a predetermined number of times; When it is determined that the data could not be recorded, the data was re-recorded in the recording area with a pulse width different from the immediately preceding recording pulse width of the recording pulse width of the data, and the re-recorded data was recorded. A second re-recording means for performing a predetermined number of operations of reproducing and judging whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data; and a second re-recording means. When it is determined that the recording has not been correctly performed even after the re-recording a predetermined number of times, the function of the replacement recording means for recording the data in a replacement area provided in the recording medium is performed.
[0080]
Next, the operation of the fifth recording function will be described with reference to the flowchart shown in FIG.
FIG. 6 is a flowchart showing a fifth recording process in the optical disc recording apparatus.
[0081]
In the fifth recording process, the CPU 15 sets the recording power P to a default value P0 and sets the upper limit value P of the recording power to a predetermined value Plim in step (indicated by “S” in the figure) 51. In step 52, the head recording pulse width D is set to a default value D0, and in step 53, the number of retry recordings (the number of re-recordings) X = At 0, the value of the number N of times of retry recording is set to 0, and the optical pickup irradiates the optical disk with laser light at step 54, so that the recording power P is first applied to the recording area designated as the recording destination of the optical disk. Data is recorded with the default value P0 and the head recording pulse width D with the default value D0.
[0082]
Next, in step 55, the recorded data is reproduced, and a reproduction signal of an area where data is recorded from the optical pickup to the optical disk with the recording power P at the default value P0 and the head recording pulse width D at the default value D0 is obtained. After being amplified by an RF amplifier, the data is binarized, EFM demodulated by a CD decoder, error-corrected by a CD-ROM decoder, and it is determined in step 56 whether or not a recording error has occurred. Determine whether or not.
If it is determined in step 56 that the data has been correctly recorded without a recording error, that is, if there is no need for error correction, or if all data has been correctly corrected by error correction, the data has been correctly recorded. End the data recording or continue recording the next data.
[0083]
On the other hand, if it is determined in step 56 that the data could not be correctly recorded due to the recording error, that is, if there was data that could not be correctly corrected even by using the error correction code, it is determined that the data could not be correctly recorded. The process proceeds to step 57 to determine whether or not the recording power P is equal to or higher than the upper limit value Plim. If the recording power P is not equal to or higher than the upper limit value Plim, the process proceeds to step 62 to determine the recording power at which the recording power P was recorded immediately before. By increasing the recording power by a predetermined recording power β, that is, by setting the recording power of the next retry recording to P + β, returning to step 54, and irradiating the optical disc with laser light from the optical pickup, the optical disc is designated as the recording destination of the optical disc. The recording power is set to P + β in the recording area, and the head recording pulse width D is kept at the default value D0. The data to retry record.
[0084]
Next, in step 55, the retry-recorded data is reproduced to obtain a reproduction signal in an area where data is recorded from the optical pickup to the optical disk with a recording power of P + β and a head recording pulse width D of the default value D0. After being amplified by an RF amplifier, the data is binarized, EFM demodulated by a CD decoder, error-corrected by a CD-ROM decoder, and it is determined in step 56 whether or not a recording error has occurred. Determine whether or not. This process is repeated a predetermined number of times until the recording power P reaches the upper limit value Plim.
[0085]
In this manner, the data is recorded by irradiating the recording area designated as the recording destination of the data rewritable optical disk with the laser beam, the recorded data is reproduced, and the recording is performed based on the reproduced data. It is determined whether or not data has been correctly recorded in the area, and if the data cannot be correctly recorded, the recording power of the laser beam is set to a higher power than the recording power of the immediately preceding recording, and the same data is recorded in the same recording area. Operation to determine whether the re-recorded data has been correctly recorded in the recording area based on the re-recorded data until the recording power P reaches the upper limit value Plim. Perform a predetermined number of times.
[0086]
When the recording power P reaches the upper limit value Plim in the determination of step 57, the process proceeds to step 58, where the head recording pulse width D of the data is increased by a predetermined recording pulse width α from the default value D0. That is, the head recording pulse width D is set to D + α, and the optical pickup is irradiated with laser light from the optical pickup in step 59, so that the recording power P is set to the value at the time of the immediately preceding retry recording (the maximum value less than the upper limit value Plim). Value), retry recording the data with the first recording pulse width of D + α, reproduce the recorded data in step 60, and obtain a reproduction signal of the area where the first recording pulse width of D + α is recorded on the optical disk from the optical pickup. After being amplified by an RF amplifier, it is binarized, EFM demodulated by a CD decoder, and error-corrected by a CD-ROM decoder. Was carried out to determine whether data is recorded correctly by determining whether no recording error at step 61.
[0087]
If it is determined in step 61 that the data has been correctly recorded without a recording error, that is, if there is no need for error correction, or if all the data has been correctly corrected by the error correction, the data is correctly recorded. End the data recording or continue recording the next data.
On the other hand, if it is determined in step 61 that the data could not be correctly recorded due to the recording error, that is, if there was data that could not be correctly corrected by using the error correction code, it is determined that the data could not be correctly recorded. In step 63, it is determined whether or not the number of retry recordings X is equal to or greater than a predetermined number of times (maximum number of retry recordings) XMAX.
[0088]
If the number of times of retry recording X is smaller than the predetermined number of times XMAX determined in step 63, the process proceeds to step 65, where 1 is added to the number of times of retry recording at X = X + 1, and the process returns to step 58 to return the data recorded immediately before. A predetermined recording pulse width α is further added to the head recording pulse width D, and the head recording pulse width at the time of retry recording is set to D + 2α. In step 59, the optical pickup irradiates the optical disk with laser light to obtain the head recording pulse width. Is retried and recorded in D + 2α, the recorded data is reproduced in step 60, and a reproduced signal in the area where the head recording pulse width is recorded in D + 2α on the optical disk is obtained from the optical pickup and amplified by an RF amplifier. Binarization, EFM demodulation with a CD decoder, and error correction processing with a CD-ROM decoder There, it is determined whether data is recorded correctly by determining whether no recording error at step 61.
[0089]
In this way, when it is determined that the recording has not been correctly performed even after repeating the operation of retry recording by increasing the recording power P a predetermined number of times, the first recording pulse width of the recording pulse width of the data is recorded in the same recording area. Re-recording with a pulse width different from the one just recorded immediately before, reproducing the re-recorded data, and judging whether or not the re-recorded data was correctly recorded in the recording area based on the reproduced data Is performed until the retry recording count X reaches the predetermined count XMAX predetermined count.
If it is determined in step 63 that the number of retry recordings X is equal to or more than the predetermined number of times XMAX set in advance, that is, it is determined that the data could not be correctly recorded even if the recording area XMAX was re-recorded the predetermined number of times. At this time, the process proceeds to step 64 to perform a recording process (replacement process) for recording data in a replacement area provided in the optical disc.
[0090]
In the fifth recording process, the recording power P is set to the default value P0, the head recording pulse width is set to the default value D0, data is recorded, the recorded recording area is reproduced, and it is determined whether or not the data is recorded correctly. I do. Here, unless a recording error occurs, it is determined that the recording has been performed correctly, and the recording is completed or the recording of the next data is continued.
On the other hand, if a recording error occurs during reproduction, the recording power is set larger by β and retry recording is performed. If retry recording is performed and a recording error does not occur, recording is completed or recording of the next data is continued. If a recording error occurs, the recording power is further increased by β and retry recording is performed. This sequence of processing is repeated, and when the recording power reaches the preset upper limit value Plim, retry recording is performed by changing the head recording pulse width D so as to be wider than the default value.
[0091]
First, retry recording is performed by setting the head recording pulse width to be wider than the default value D0 by α. If retry recording is performed and no recording error occurs, the recording is completed or recording of the next data is continued. If a recording error occurs, the retry recording is performed by further increasing the first recording pulse width by α (expanding by 2α from the default value). Do. The flow of this series of processing is repeated, and when the number of retry recordings reaches a predetermined maximum number XMAX, the processing shifts to the replacement processing.
In the fifth recording function of the optical disk device of this embodiment, good recording quality can be maintained by increasing the recording power and performing retry recording within a range where the laser diode does not deteriorate.
[0092]
(6) Sixth recording function according to the present invention in this optical disk recording apparatus
In the recording function described above, during retry recording, recording is performed with a head recording pulse width wider than the default value, and the transition from retry recording to replacement processing is performed for data that could not be correctly corrected using the error correction code of the reproduced data. Judgment was made based on whether or not the number exceeded a certain amount.However, an increase or decrease in the number of data that could not be corrected correctly using the error correction code of the reproduced data can also be used as a judgment material. The number of retry recording repetitions can be reduced as compared with the function.
Further, even with the above-described recording function, the number of repetitions can be reduced each time retry recording occurs, but the recording processing program is initialized after power is turned off or after reset.
[0093]
Therefore, if the recording processing program is maintained even after the power is turned off or after the reset, if the same type of optical disc is used, the second and subsequent optical discs have the same number of repetitions when the first retry recording occurs. Than can be reduced. Therefore, when recording a plurality of optical disks of the same type, the effect of shortening the recording time is increased.
In the sixth recording function, the number of times of retry recording and the data recording time of an optical disc per one sheet are further reduced.
[0094]
In order to realize the sixth recording function, a recording procedure for recording data by irradiating a laser beam on a recording area of a rewritable recording medium on a ROM 14 or a RAM 16 of an optical disc device, A first judging procedure for reproducing the recorded data and judging whether or not the data has been correctly recorded in the recording area based on the reproduced data, and judging that the recording was not correctly performed by the first judging procedure Then, the data is re-recorded in the recording area with a different pulse width from the immediately preceding recording pulse width of the recording pulse width of the data, and the re-recorded data is reproduced. The number of data that could not be corrected correctly using the error correction code of the A re-recording procedure for performing a predetermined number of operations to determine whether or not the re-recorded data has been correctly recorded in the recording area based on whether or not the number of data has increased, and re-recording a predetermined number of times by the re-recording procedure. When it is determined that the data cannot be correctly recorded, a replacement recording procedure for recording the data in a spare area provided in the recording medium, and an error correction code for the reproduced data at the time of re-recording by the re-recording procedure. A second determination procedure for determining whether to repeat re-recording of data by the re-recording procedure or to record the data in the replacement area by the replacement recording procedure based on the number of data that could not be correctly corrected by using And re-recording the data by the re-recording procedure based on the determination result of the second determining procedure, The program for executing the procedure for switching whether to record the data to install (CPU can store executable manner).
[0095]
When the CPU 15 executes the program, data is recorded by irradiating the recording area of the data rewritable recording medium with a laser beam, the recorded data is reproduced, and based on the reproduced data. It is determined whether or not the data has been correctly recorded in the recording area, and when the data could not be correctly recorded by the determination, the first recording pulse width of the recording pulse width of the data was recorded immediately before in the recording area. The above data was re-recorded with a different pulse width, the re-recorded data was reproduced, and the number of data that could not be corrected correctly using the error correction code of the reproduced data was incorrect when the immediately preceding data was recorded. Whether the re-recorded data was correctly recorded in the recording area based on whether or not the number of data that could not be corrected increased The operation of judging whether or not is performed a predetermined number of times, when it is determined that the recording was not correctly performed even after re-recording the predetermined number of times, the data is recorded in a spare area provided in the recording medium, and when the re-recording is performed, It is determined whether to repeat the re-recording of the data or to record the data in the spare area based on the number of data that could not be corrected correctly using the error correction code for the reproduced data, and based on the result of the determination. Then, a recording process for switching between re-recording of the data and recording of the data in the spare area is performed.
[0096]
That is, the CPU 15 or the like irradiates a recording area of a rewritable recording medium with laser light to record data, and reproduces the data recorded by the recording means. First judging means for judging whether or not the data has been correctly recorded in the recording area on the basis of the data, and when the first judging means judges that the data has not been correctly recorded, the recording pulse of the data is written in the recording area. Re-records the above data with a pulse width different from the one immediately before the first recording pulse width of the width, reproduces the re-recorded data, and corrects correctly even using the error correction code of the reproduced data The re-recording was performed based on whether or not the number of data that could not be increased was larger than the number of data that could not be corrected correctly when recorded immediately before. A re-recording means for performing a predetermined number of operations for determining whether or not the data has been correctly recorded in the recording area; and A replacement recording unit for recording the data in a replacement area provided in the storage unit, based on the number of data that could not be correctly corrected by using the error correction code for the reproduced data at the time of re-recording by the re-recording unit. A second determining means for determining whether to repeat re-recording of data by the re-recording means or to record the data in the replacement area by the replacement recording means, based on a result of the determination by the second determining means. A function of means for switching between re-recording of data by the re-recording means and recording of the data in the replacement area by the replacement recording means. Plus.
[0097]
Next, the operation of the sixth recording function will be described with reference to the flowchart shown in FIG.
FIG. 7 is a flowchart showing a sixth recording process in the optical disc recording apparatus.
In the sixth recording process, the CPU 15 determines in step (indicated by “S” in the figure) 71 whether or not the first data is to be written. The recording pulse width DMAX is set to the default value D0, and the routine proceeds to step 73. If it is not the writing of the first data (recording of the first data), the process directly proceeds to step 73.
[0098]
At step 73, an initial value is set. In the setting of the initial value, the initial value “0” is set to the replacement process shift determination value Y, and the head recording pulse width D is different from that immediately before when the data is re-recorded (retry recording). Is set to a default value (initial value) D0.
In step 74, the optical pickup irradiates the optical disk with laser light, and first, data is recorded in a recording area designated as a recording destination of the optical disk with the default recording pulse width D set to the default value D0.
Next, in step 75, the recorded data is reproduced, and a reproduced signal in the area where the data is recorded with the default value D0 with the head recording pulse width D from the optical pickup to the optical disk is obtained. The EFM demodulation is performed by the CD decoder, the error correction process is performed by the CD-ROM decoder, and it is determined whether or not the data is correctly recorded by determining whether or not there is a recording error in step 76.
[0099]
If it is determined in step 76 that the data has been correctly recorded without a recording error, that is, if there is no need for error correction, or if all the data has been correctly corrected by the error correction, the data has been correctly recorded. Then, the process proceeds to step 77, where it is determined whether or not the head recording pulse width D is larger than the maximum recordable head recording pulse width DMAX. If not, the data recording ends or the next data is recorded. If it is larger, the process proceeds to step 78, where the head recording pulse width D is stored in the memory (the management area or the empty area of the optical disk 1, the RAM 16 or the like) as the maximum recordable head recording pulse width DMAX, and the end of data recording or the next data Continue recording.
[0100]
On the other hand, if it is determined in step 76 that the data could not be correctly recorded due to the recording error, that is, if there was data that could not be correctly corrected by using the error correction code, it is determined that the data could not be correctly recorded. In step 79, the number X of the uncorrectable data (the number of data that could not be correctly corrected even by using the error correction code) X is obtained, and in step 80, it is determined whether or not the replacement processing shift determination value Y = 0. If the replacement processing shift determination value Y = 0, the routine proceeds to step 83, where the replacement processing shift determination value Y is set to the number X of uncorrectable data, and the predetermined recording pulse width is added to the head recording pulse width D of the data recorded immediately before in step 84. α is added, and the process returns to step 74 to irradiate the optical disk with laser light from the optical pickup, thereby setting the head recording pulse width to D + α. Is retry-recorded, the recorded data is reproduced in step 75, a reproduction signal of the area where the data is recorded with the head recording pulse width of D + α from the optical pickup on the optical disk is obtained, and the signal is binarized after being amplified by the RF amplifier. EFM demodulation is performed by the CD decoder, error correction processing is performed by the CD-ROM decoder, and it is determined in step 76 whether or not there is no recording error, thereby determining whether or not the data is correctly recorded.
[0101]
Next, if it is determined in step 80 that the replacement processing transition determination value Y is not 0, it is determined in step 81 whether the number X of uncorrectable data is greater than the replacement processing transition determination value Y. That is, whether or not the number of data that could not be correctly corrected even when the re-recorded data was reproduced and the error correction code of the reproduced data was used was larger than the number of data that could not be correctly corrected in the immediately preceding recording. Then, it is determined whether or not the re-recorded data has been correctly recorded in the recording area.
If it is determined in step 81 that the number X of uncorrectable data is not larger than the replacement processing shift determination value Y, the process proceeds to step 83 and the above processing is repeated. Also, if the number X of uncorrectable data is larger than the replacement processing shift determination value Y, that is, if the number of data that could not be corrected correctly using the error correction code of the reproduced data can be correctly corrected when it was recorded immediately before. If the number of data has increased, the process proceeds to step 82 to perform a recording process (replacement process) of recording data in a replacement area provided in the optical disc.
[0102]
In this processing, first, the head recording pulse width is recorded with the default value D0 by irradiating the optical disc 1 with laser light from the optical pickup 3. Next, a reproduction signal of the recording area recorded from the optical pickup 3 is obtained, amplified by the read amplifier 6, binarized, EFM demodulated by the CD decoder 8, and subjected to error correction processing to determine whether or not the data is correctly recorded. Judge. Here, if there is no need for error correction, or if all data has been correctly corrected by the error correction, it is determined that the data has been correctly recorded, and the recording is terminated or the recording of the next data is continued.
If there is data that cannot be correctly corrected even by using the error correction code, the retry recording is performed by setting the number X of uncorrectable data as the replacement processing transition determination value Y and setting the leading recording pulse width to be wider by α. The retry recording is performed, and if there is no recording error in which the data cannot be corrected even by using the error correction code, the recording is completed or the recording of the next data is continued.
[0103]
If a recording error still occurs, the number of uncorrectable data X is compared with a replacement processing shift determination value Y, and if the number of uncorrectable data X is larger than the replacement processing shift determination value Y, the processing shifts to replacement processing. For example, the number X of uncorrectable data is stored as the replacement processing transition determination value Y, the head recording pulse width is set wider by α, and retry recording is performed. Hereinafter, this series of processing is repeated.
[0104]
In the sixth recording function of the optical disk device of this embodiment, in the retry recording, the number of data that could not be correctly corrected by using the error correction code of the data reproduced after recording increased from the number at the time of the immediately preceding retry recording. In this case, pay attention to the possibility that correct recording is not possible even if retry recording is repeated later.In such a case, it is possible to stop repetition of retry recording and shift to recording in the replacement area, so that correct recording can not be performed It is possible to reduce the number of times of retry recording with high reliability, and to shorten the recording time.
[0105]
(7) Seventh recording function according to the present invention in this optical disk recording apparatus
In the above-described sixth recording function, a cause of a recording error even if the leading pulse width is increased in retry recording is that the amount of the increased width is insufficient. For this reason, the shape of the recording pit may be a shape unsuitable for a recording disk.
Retry recording with a leading pulse width that results in a recording pit shape that is not suitable for a recording disk has a high possibility of not being able to record correctly, and causes a longer recording time.
Therefore, in the seventh recording function, the recording time is further reduced.
[0106]
In order to realize the seventh recording function, a recording procedure for recording data by irradiating a laser beam onto a recording area of a rewritable recording medium on a ROM 14 or a RAM 16 of an optical disc device, A procedure for reproducing the recorded data and determining whether or not the data has been correctly recorded in the recording area based on the reproduced data; and determining that the recording has not been correctly performed by the determination procedure. Re-recording the data with a pulse width different from the last recording pulse width of the recording pulse width of the data at the time immediately before, reproducing the re-recorded data, based on the reproduced data, A re-recording procedure for performing a predetermined number of operations to determine whether the re-recorded data has been correctly recorded in the recording area, A maximum head recording pulse width storing procedure that stores the maximum head recording pulse width that is the maximum value of the head recording pulse widths of data that has been re-recorded a predetermined number of times by the recording procedure and has been correctly recorded, When data is recorded in a recording area of a rewritable recording medium, the recorded data is reproduced, and it is determined whether or not the data has been correctly recorded based on the reproduced data. When it is determined that the recording cannot be performed, the operation of re-recording the data with a pulse width different from that immediately before the head recording pulse width of the recording pulse width of the data is performed a predetermined number of times, and the operation of the predetermined number of times is performed. During the operation, the head recording pulse width of the data to be re-recorded is the maximum head recording pulse stored in the maximum head recording pulse width storage procedure. When it becomes more than the width, install (CPU can store executable manner) the program for executing the replacement recording procedure for recording the data in the spare area provided in the recording medium.
[0107]
When the CPU 15 executes the program, data is recorded by irradiating the recording area of the data rewritable recording medium with a laser beam, the recorded data is reproduced, and based on the reproduced data. It is determined whether or not the data was correctly recorded in the recording area, and when it was determined that the data could not be correctly recorded, the head recording pulse width of the recording pulse width of the data in the recording area was set immediately before. The data is re-recorded with a different pulse width from the recorded data, the re-recorded data is reproduced, and it is determined whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data. Is performed a predetermined number of times, and is the maximum value of the first recording pulse width of the data that can be correctly recorded after re-recording the predetermined number of times. When the large head recording pulse width is stored and then data is recorded in a recording area of a rewritable recording medium, the recorded data is reproduced, and the data can be correctly recorded based on the reproduced data. And if it is determined that the data could not be correctly recorded, the data is re-recorded with a different pulse width from the last recording pulse width of the recording pulse width of the data. When the head recording pulse width of the data to be re-recorded becomes equal to or larger than the stored maximum head recording pulse width during the predetermined number of operations, the replacement provided in the recording medium is performed. A recording process for recording the data in the area is performed.
[0108]
That is, the CPU 15 or the like irradiates a recording area of a rewritable recording medium with laser light to record data, and reproduces the data recorded by the recording means. A determining means for determining whether or not the data has been correctly recorded in the recording area based on the data, and when the determining means determines that the data has not been correctly recorded, the first recording of the recording pulse width of the data in the recording area is performed. The data is re-recorded with a pulse width different from the pulse width recorded immediately before, the re-recorded data is reproduced, and based on the reproduced data, the re-recorded data can be correctly recorded in the recording area. Re-recording means for performing an operation of determining whether or not the recording has been performed a predetermined number of times; Maximum head recording pulse width storing means for storing the maximum head recording pulse width which is the maximum value of the head recording pulse widths of the data, and then storing the data in a recording area of a recording medium on which data can be rewritten by the recording means. When recording is performed, the recorded data is reproduced, and it is determined whether or not the data has been correctly recorded based on the reproduced data. An operation of re-recording the data with a pulse width different from that immediately before the first recording pulse width of the width is performed a predetermined number of times, and during the predetermined number of operations, the first recording pulse of the data to be re-recorded is performed. When the width becomes equal to or greater than the maximum head recording pulse width stored in the maximum head recording pulse width storage means, a replacement area provided in the recording medium is provided. Serve replacement recording means for recording the data to.
[0109]
Next, the operation of the seventh recording function will be described with reference to the flowcharts shown in FIGS.
FIG. 8 is a flowchart showing a seventh recording process in the optical disc recording apparatus.
In the seventh recording process, the CPU 15 executes the process shown in the flowchart of FIG. In this process, the maximum recordable head recording pulse width DMAX is stored in step 78. If no retry recording has occurred, the maximum recording head recording pulse width DMAX remains at the default value D0, but if recording is performed correctly by retry recording, the head recording pulse width D at that point can be maximum recorded. It is stored as the first recording pulse width DMAX.
[0110]
Then, when a value different from the default value D0 enters the maximum recordable head recording pulse width DMAX, the CPU 15 shifts to the processing operation shown in the flowchart of FIG.
Here, the determination as to whether or not to shift from the processing of the flowchart shown in FIG. 7 to the processing shown in the flowchart of FIG. 8 may be based on the number of times retry recording has occurred, or the maximum recordable head recording pulse. The number of times the width DMAX has been updated may be used as a reference.
In the recording after shifting to the process shown in the flowchart of FIG. 8, the CPU 15 sets an initial value in step 91. In the setting of the initial value, the initial recording pulse width D is set to a default value (initial value) D0 at the time of data re-recording (retry recording) so as to be different from the immediately preceding recording pulse width D.
[0111]
In step 92, the optical pickup irradiates the optical disk with laser light, and first, data is recorded in the recording area designated as the recording destination of the optical disk with the default recording pulse width D set to the default value D0.
Next, in step 93, the recorded data is reproduced, and a reproduced signal in the area where the data is recorded with the default recording value D0 from the optical pickup to the optical disk with the head recording pulse width D is obtained. The EFM demodulation is performed by the CD decoder, the error correction is performed by the CD-ROM decoder, and it is determined whether or not the data is correctly recorded by determining at step 94 whether or not there is a recording error.
[0112]
If it is determined in step 94 that the data has been correctly recorded without a recording error, that is, if there is no need for error correction, or if all data has been correctly corrected by error correction, the data has been correctly recorded. End the data recording or continue recording the next data.
On the other hand, if it is determined in step 94 that the data could not be correctly recorded due to the presence of a recording error, that is, if there was data that could not be correctly corrected by using the error correction code, it is determined that the data could not be correctly recorded. In step 95, it is determined whether or not the head recording pulse width D has become equal to or larger than the maximum recordable head recording pulse width DMAX.
[0113]
If the head recording pulse width D is smaller than the maximum recordable head recording pulse width DMAX as determined in step 95, the process proceeds to step 97, where a predetermined recording pulse width α is added to the head recording pulse width D of the data recorded immediately before and retry recording is performed. Then, the head recording pulse width is set to D + α, the process returns to step 92, and the optical pickup irradiates the optical disc with laser light, thereby retry-recording the data with the head recording pulse width of D + α, and in step 93, the recorded data is rewritten. Reproduce, obtain a reproduction signal in the area where data is recorded on the optical disk with the head recording pulse width of D + α from the optical pickup, amplify it with an RF amplifier, binarize it, perform EFM demodulation with a CD decoder, and perform error correction with a CD-ROM decoder. Correction processing is performed, and it is determined in step 94 whether there is no recording error or not. It determines whether it is recorded.
[0114]
In this way, first, data in which the head recording pulse width D is set to the default value D0 is recorded in the recording area of the recording destination of the optical disk 1, the recorded data is reproduced, and the recorded area is recorded in the recording area based on the reproduced data. It is determined whether or not the data has been correctly recorded. When the data cannot be correctly recorded by the judgment, the predetermined recording pulse width α is added to the head recording pulse width D of the recording pulse width of the immediately preceding data, and the pulse width is changed to a pulse width different from the immediately preceding recording. The operation of re-recording, reproducing the re-recorded data, and judging whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data is performed by a head recording pulse width D having a maximum recordable maximum head recording. The process is performed until the pulse width becomes DMAX or more.
[0115]
If the head recording pulse width D is equal to or larger than the maximum recordable head recording pulse width DMAX in the judgment of step 95, that is, if the head recording pulse width D is equal to or larger than the maximum head recording pulse width, the process proceeds to step 96 and the process proceeds to step 96. The recording process (replacement process) for recording data in the replacement area provided in the storage device is performed.
In this process, a determination is made to shift from the retry recording to the replacement process based on the maximum recording head recording pulse width DMAX.
[0116]
First, data is recorded with the head recording pulse width set to the default value D0. Next, the data is reproduced, error correction processing is performed, and it is determined whether or not the data is correctly recorded. Here, if there is no need for error correction, or if all data has been correctly corrected by the error correction, it is determined that the data has been correctly recorded, and the recording is terminated or the recording of the next data is continued. When there is data that cannot be correctly corrected even by using the error correction code, the head recording pulse width D at that time is compared with the maximum recordable head recording pulse width DMAX, and the head recording pulse width D is set to the maximum recordable head recording pulse width. If it is larger than DMAX, the process shifts to the replacement process. If it is smaller than DMAX, the first recording pulse width is set wider by α and retry recording is performed. Hereinafter, this series of processing is repeated.
The criterion may be the maximum recordable head recording pulse width DMAX, or a value slightly larger than the maximum recordable head recording pulse width DMAX with a margin.
[0117]
The seventh recording function of the optical disc device of this embodiment is to determine whether to repeat retry recording or to shift to recording in a replacement area, based on the head recording pulse width that can be correctly recorded in the retry recording that occurred in the previous recording area. By making a comparison, it is possible to reduce the number of times of retry recording that is highly unlikely to be able to perform correct recording, and to reduce the recording time.
[0118]
(8) Eighth recording function according to the present invention in this optical disk recording apparatus
In some disks, the leading recording pulse width expanded so that the shape of the recording pits is not suitable for the optical disk is generally not suitable for other optical disks of the same type.
Therefore, the head recording pulse width can be used even when recording is performed on another optical disk of the same type, and the recording time can be reduced by using the head recording pulse width.
However, in the above-described recording function, even if the data of the above-described first recording pulse width remains in the memory after the power is turned off or after the reset, the recording speed and the type of the optical disk are not stored, so that it cannot be used. .
Therefore, in the eighth recording function, the head recording pulse width is held together with the type of the optical disk after the power is turned off or after the reset.
[0119]
In order to realize the eighth recording function, the program stores the maximum recording pulse width, the recording speed and the type of the recording medium at that time, and keeps the information even after the power of the apparatus itself is turned off or reset. The eighth recording function is realized by adding a procedure and executing the procedure by the CPU 15 or the like.
In the eighth recording process, after the CPU 15 finishes recording all data in the above-described recording process operation, the maximum recordable head recording pulse width DMAX finally determined, the type of the optical disk, and the recording speed Is stored in the RAM 16 so as to be able to be referred to.
[0120]
Thus, when recording a plurality of optical disks of the same type even after the power is turned off or after a reset, the maximum recordable head recording pulse width DMAX corresponding to that type of optical disk stored in the RAM 16 is read and set, and the recording is performed. Data recording for the second and subsequent sheets can be performed with a pulse width. Accordingly, the number of times of retry recording can be greatly reduced when recording data for the second and subsequent sheets.
The eighth recording function of the optical disc apparatus of this embodiment is that when recording a plurality of optical discs of the same type, two pieces of data having the maximum head recording pulse width when the first recording was successfully performed by retry recording are performed. By utilizing the same for subsequent recordings, it is possible to reduce the data recording time for a plurality of optical disks of the same type.
[0121]
(9) Ninth recording function according to the present invention in this optical disk recording apparatus
In the case of recording a plurality of optical disks of the same type, performing the above-described recording function process for each optical disk is problematic because the recording time becomes long.
Thus, in the ninth recording function, the recording time for recording a plurality of optical disks of the same type is reduced.
[0122]
In order to realize the ninth recording function, data is recorded in the above program by irradiating a laser beam to a recording area of a rewritable recording medium after the power of the apparatus itself is cut off or after resetting. The recorded data is reproduced, and it is determined whether or not the data has been correctly recorded based on the reproduced data. When it is determined that the data cannot be recorded correctly, the first recording of the recording pulse width of the data is performed. The operation of re-recording the data with a pulse width different from the pulse width recorded immediately before was performed a predetermined number of times, and the head recording pulse width of the data to be re-recorded was stored during the predetermined number of operations. A procedure for recording the data in a spare area provided in the recording medium when the pulse width becomes equal to or larger than the maximum head recording pulse width is added. Etc. are by run instructions, to implement the recording function of the ninth.
[0123]
Next, the operation of the ninth recording function will be described with reference to the flowchart shown in FIG.
In the eighth recording process, the CPU 15 performs the process shown in FIG. 8 from the first data recording on the optical disc.
First, in step 91, the CPU 15 determines the type and recording speed of the optical disc, and if the maximum recordable head recording pulse width DMAX corresponding to the type is stored in the RAM, the CPU 15 derives the value to allow maximum recordable data recording. The head recording pulse width is DMAX.
In step 91, an initial value is set. In the setting of the initial value, the initial recording pulse width D is set to a default value (initial value) D0 at the time of data re-recording (retry recording) so as to be different from the immediately preceding recording pulse width D.
[0124]
In step 92, the optical pickup irradiates the optical disk with laser light, and first, data is recorded in the recording area designated as the recording destination of the optical disk with the default recording pulse width D set to the default value D0.
Next, in step 93, the recorded data is reproduced, and a reproduced signal in the area where the data is recorded with the default recording value D0 from the optical pickup to the optical disk with the head recording pulse width D is obtained. The EFM demodulation is performed by the CD decoder, the error correction is performed by the CD-ROM decoder, and it is determined whether or not the data is correctly recorded by determining at step 94 whether or not there is a recording error.
[0125]
If it is determined in step 94 that the data has been correctly recorded without a recording error, that is, if there is no need for error correction, or if all data has been correctly corrected by error correction, the data has been correctly recorded. End the data recording or continue recording the next data.
On the other hand, if it is determined in step 94 that the data could not be correctly recorded due to the presence of a recording error, that is, if there was data that could not be correctly corrected by using the error correction code, it is determined that the data could not be correctly recorded. In step 95, it is determined whether or not the head recording pulse width D has become equal to or larger than the maximum recordable head recording pulse width DMAX.
[0126]
If the head recording pulse width D is smaller than the maximum recordable head recording pulse width DMAX as determined in step 95, the process proceeds to step 97, where a predetermined recording pulse width α is added to the head recording pulse width D of the data recorded immediately before and retry recording is performed. Then, the head recording pulse width is set to D + α, the process returns to step 92, and the optical pickup irradiates the optical disc with laser light, thereby retry-recording the data with the head recording pulse width of D + α, and in step 93, the recorded data is rewritten. Reproduce, obtain a reproduction signal in the area where data is recorded on the optical disk with the head recording pulse width of D + α from the optical pickup, amplify it with an RF amplifier, binarize it, perform EFM demodulation with a CD decoder, and perform error correction with a CD-ROM decoder. Correction processing is performed, and it is determined in step 94 whether there is no recording error or not. It determines whether it is recorded.
[0127]
In this way, first, data in which the head recording pulse width D is set to the default value D0 is recorded in the recording area of the recording destination of the optical disk 1, the recorded data is reproduced, and the recorded area is recorded in the recording area based on the reproduced data. It is determined whether or not the data has been correctly recorded. When the data cannot be correctly recorded by the judgment, the predetermined recording pulse width α is added to the head recording pulse width D of the recording pulse width of the immediately preceding data, and the pulse width is changed to a pulse width different from the immediately preceding recording. The operation of re-recording, reproducing the re-recorded data, and judging whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data is performed by a head recording pulse width D having a maximum recordable maximum head recording. The process is performed until the pulse width becomes DMAX or more.
[0128]
If the head recording pulse width D is equal to or larger than the maximum recordable head recording pulse width DMAX in the judgment of step 95, that is, if the head recording pulse width D is equal to or larger than the maximum head recording pulse width, the process proceeds to step 96 and the process proceeds to step 96. The recording process (replacement process) for recording data in the replacement area provided in the storage device is performed.
The ninth recording function of the optical disk device of this embodiment eliminates the step of obtaining the maximum recording pulse width of the first recording pulse width that can be correctly recorded in retry recording for the second and subsequent optical disks when recording a plurality of optical disks of the same type. And the recording time can be further reduced.
[0129]
In the above embodiment, the case where the program of each recording function according to the present invention is stored in the ROM as a computer-readable recording medium has been described. However, if the program is stored in a recording medium such as an optical disk, the recording The present invention can be installed directly on an optical disk device via a medium, installed on an optical disk device from a host computer connected to the optical disk device, or installed on a host computer to control the optical disk device. Such a recording function program can be easily and widely distributed.
[0130]
【The invention's effect】
As described above, according to the information recording apparatus and the information recording method of the present invention, it is possible to increase the probability that data can be correctly recorded without performing a replacement process when recording data on a recording medium. Further, according to the program of the present invention, it is possible to make a computer easily realize the functions according to the present invention. Further, according to the computer-readable recording medium of the present invention, a program to be executed by a computer can be easily and widely distributed.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of an optical disc device according to an embodiment of the present invention.
FIG. 2 is a waveform diagram showing an example of a shape of a data recording pulse width on a data rewritable optical disc 1;
FIG. 3 is a flowchart showing a first recording process in the optical disc device.
FIG. 4 is a flowchart showing a third recording process in the optical disc recording apparatus.
FIG. 5 is a flowchart showing a fourth recording process in the optical disc recording apparatus.
FIG. 6 is a flowchart showing a fifth recording process in the optical disc recording device.
FIG. 7 is a flowchart showing a sixth recording process in the optical disc recording apparatus.
FIG. 8 is a flowchart showing a seventh recording process in the optical disc recording apparatus.
[Explanation of symbols]
1: Optical disk 2: Spindle motor
3: Optical pickup 4: Motor driver
5: Laser controller 6: Read amplifier (RF amplifier)
7: CD encoder 8: CD decoder
9: Servo unit 10: CD-ROM encoder
11: Buffer RAM (buffer memory)
12: CD-ROM decoder
13: Buffer manager
14: ROM 15: CPU
16: RAM

Claims

A recording unit that records data by irradiating a recording area of a rewritable data recording medium with laser light, and reproduces data recorded by the recording unit, and writes the data to the recording area based on the reproduced data. Judging means for judging whether or not the data has been correctly recorded, and when the judging means judges that the data could not be correctly recorded, the head recording pulse width of the recording pulse width of the data was recorded immediately before in the recording area. An operation of re-recording the data with a different pulse width, reproducing the re-recorded data, and determining whether the re-recorded data has been correctly recorded in the recording area based on the reproduced data. Re-recording means for performing a predetermined number of times, and when it is determined that the data cannot be correctly recorded even after re-recording a predetermined number of times by the re-recording means, Information recording apparatus is characterized in that a replacement recording means for recording the data in the spare area provided.

The information recording device according to claim 1,
Means for judging whether or not data can be correctly recorded in the recording area based on the number of data that could not be correctly corrected even if an error correction code was used for the reproduced data; and When it is determined that data can be correctly recorded, re-recording of data by the re-recording unit is repeated.When it is determined that data cannot be correctly recorded in the recording area, the replacement recording unit records the data in the replacement area. An information recording device for recording data.

The information recording device according to claim 1 or 2,
An information recording apparatus, wherein when re-recording the predetermined number of times, after a preset number of times within the predetermined number of times, the amount by which the pulse width is changed is changed.

The information recording device according to claim 1 or 2,
When the number of re-recordings performed during the previous recording is equal to or more than a predetermined number, the head recording pulse width of the recording pulse width of the data to be recorded by the recording means is recorded with a pulse width different from the initial value. An information recording device, characterized in that:

A recording unit that records data by irradiating a recording area of a rewritable data recording medium with laser light, and reproduces data recorded by the recording unit, and writes the data to the recording area based on the reproduced data. Judging means for judging whether or not the data has been correctly recorded, and when it is judged by the judging means that the recording was not correctly performed, the recording power of the laser beam is set to a power larger than the recording power at the time of immediately preceding recording, and Perform a predetermined number of operations of re-recording data in the recording area, reproducing the re-recorded data, and determining whether the re-recorded data has been correctly recorded in the recording area based on the reproduced data. A first re-recording unit, and when the first re-recording unit determines that the recording has not been performed correctly even after re-recording a predetermined number of times, Re-recording the data with a pulse width different from the time immediately before the first recording pulse width of the recording pulse width of the data, reproduce the re-recorded data, based on the reproduced data A second re-recording means for performing a predetermined number of operations for determining whether or not the re-recorded data has been correctly recorded in the recording area; An information recording device, comprising: a replacement recording unit that records the data in a replacement area provided in the recording medium when it is determined that the data has been read.

Data is recorded by irradiating the recording area of the data rewritable recording medium with laser light, the recorded data is reproduced, and the data is correctly recorded in the recording area based on the reproduced data. Then, if the data could not be recorded correctly, the data was re-recorded in the recording area with a different pulse width from the last recording pulse width of the recording pulse width of the data. Then, the re-recorded data is reproduced, and an operation of judging whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data is performed a predetermined number of times. Recording the data in a spare area provided in the recording medium when it is determined that the data cannot be correctly recorded.

Data is recorded by irradiating the recording area of the data rewritable recording medium with laser light, the recorded data is reproduced, and the data is correctly recorded in the recording area based on the reproduced data. If the recording is not correctly performed by the determination, the recording power of the laser beam is set to a power higher than the recording power at the time of immediately preceding recording, and the data is re-recorded in the recording area. The recorded data is reproduced, and the operation of determining whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data is performed a predetermined number of times. When it is determined that there is no recording pulse width of the data in the recording area, the first recording pulse width of the data recording pulse width with a different pulse width than when recorded immediately before The data is re-recorded, the re-recorded data is reproduced, and an operation of judging whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data is performed a predetermined number of times. An information recording method for recording the data in a spare area provided in the recording medium when it is determined that the data cannot be correctly recorded even after re-recording the number of times.

A recording procedure for recording data by irradiating a computer with a laser beam on a recording area of a rewritable recording medium, reproducing the data recorded by the recording procedure, and performing the recording based on the reproduced data. A determination procedure for determining whether or not the data has been correctly recorded in the area; and when it is determined that the data has not been correctly recorded by the determination procedure, the head recording pulse width of the data recording pulse width in the recording area is set immediately before. The data is re-recorded with a pulse width different from that recorded when the data is re-recorded, the re-recorded data is reproduced, and it is determined whether or not the re-recorded data was correctly recorded in the recording area based on the reproduced data. A re-recording procedure in which the determining operation is performed a predetermined number of times, and when it is determined that the recording was not correctly performed even after the re-recording procedure performed the predetermined number of times. Program for executing a replacement recording procedure of recording the data in the spare area provided in the recording medium.

A recording procedure for recording data by irradiating a computer with a laser beam on a recording area of a rewritable recording medium, reproducing the data recorded by the recording procedure, and performing the recording based on the reproduced data. A determination procedure for determining whether or not the data has been correctly recorded in the area; and, when it is determined that the data has not been correctly recorded by the determination procedure, the recording power of the laser beam is higher than the recording power of the immediately preceding recording. Re-recording the data in the recording area, reproducing the re-recorded data, and determining whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data. A first re-recording procedure performed a predetermined number of times, and it was determined that the data could not be correctly recorded even after the re-recording was performed a predetermined number of times by the first re-recording procedure In the recording area, the data is re-recorded with a pulse width different from the immediately preceding recording pulse width of the recording pulse width of the data in the recording area, and the re-recorded data is reproduced. A second re-recording procedure for performing a predetermined number of operations of determining whether or not the re-recorded data has been correctly recorded in the recording area based on the data; and And a replacement recording procedure for recording the data in a replacement area provided in the recording medium when it is determined that the data cannot be correctly recorded.

A recording unit that records data by irradiating a recording area of a rewritable data recording medium with laser light, and reproduces data recorded by the recording unit, and writes the data to the recording area based on the reproduced data. First determining means for determining whether or not the data has been correctly recorded; and when the first determining means determines that the data cannot be correctly recorded, the first recording pulse of the recording pulse width of the data is recorded in the recording area. The data is re-recorded with a pulse width different from that immediately before the width was recorded, the re-recorded data is reproduced, and the number of data that cannot be correctly corrected by using the error correction code of the reproduced data is immediately before. Whether the re-recorded data was correctly recorded in the recording area based on whether or not the number of data that could not be corrected correctly when recorded was increased. Re-recording means for performing an operation of determining whether the data has been recorded a predetermined number of times, and when it is determined that the data cannot be correctly recorded even after re-recording the predetermined number of times, the data is recorded in a spare area provided in the recording medium A re-recording unit that repeats re-recording of data by the re-recording unit based on the number of data that could not be correctly corrected by using an error correction code for the reproduced data at the time of re-recording by the re-recording unit. A second determining means for determining whether to record the data in the replacement area by the replacement recording means, and whether to repeat re-recording of data by the re-recording means based on a result of the determination by the second determining means. Means for switching whether to record the data in the replacement area by the replacement recording means.

A recording unit that records data by irradiating a recording area of a rewritable data recording medium with laser light, and reproduces data recorded by the recording unit, and writes the data to the recording area based on the reproduced data. Judging means for judging whether or not the data has been correctly recorded, and when the judging means judges that the data could not be correctly recorded, the head recording pulse width of the recording pulse width of the data was recorded immediately before in the recording area. An operation of re-recording the data with a different pulse width, reproducing the re-recorded data, and determining whether the re-recorded data has been correctly recorded in the recording area based on the reproduced data. Means for performing a predetermined number of times, and the maximum value of the leading recording pulse widths of the data which has been correctly re-recorded and re-recorded a predetermined number of times by the re-recording means. A maximum head recording pulse width storing means for storing a certain maximum head recording pulse width, and when data is recorded in a recording area of a rewritable recording medium by the recording means, the recorded data is reproduced, It is determined whether or not the data was correctly recorded based on the reproduced data, and when it was determined that the data could not be correctly recorded by the determination, the head recording pulse width of the recording pulse width of the data was recorded immediately before. The operation of re-recording the data with a different pulse width is performed a predetermined number of times, and during the predetermined number of operations, the head recording pulse width of the data to be re-recorded is stored in the maximum head recording pulse width storage means. And a replacement recording means for recording the data in a replacement area provided in the recording medium when the recording width becomes equal to or greater than the maximum head recording pulse width. Information recording apparatus according to claim.

The information recording apparatus according to claim 11,
An information recording apparatus, comprising means for storing the recording speed and the type of recording medium at that time together with the maximum head recording pulse width and keeping the same even after the power of the apparatus itself is turned off or reset.

The information recording apparatus according to claim 11,
After shutting down or resetting the power of the apparatus itself, the data is recorded by irradiating a recording area of a rewritable data recording medium with a laser beam, the recorded data is reproduced, and the recorded data is reproduced based on the reproduced data. It is determined whether or not the data was correctly recorded, and when it was determined that the data could not be recorded correctly, the first recording pulse width of the recording pulse width of the data was different from the immediately preceding recording pulse width. The operation of re-recording data is performed a predetermined number of times, and within the predetermined number of operations, the head recording pulse width of the data to be re-recorded is equal to or greater than the maximum head recording pulse width stored in the maximum head recording pulse width storage means. An information recording apparatus, further comprising means for recording the data in a spare area provided in the recording medium when the data becomes inconsistent.

Data is recorded by irradiating the recording area of the data rewritable recording medium with laser light, the recorded data is reproduced, and the data is correctly recorded in the recording area based on the reproduced data. Then, if the data could not be recorded correctly, the data was re-recorded in the recording area with a different pulse width from the last recording pulse width of the recording pulse width of the data. Then, the re-recorded data is reproduced, and whether or not the number of data that could not be corrected correctly using the error correction code of the reproduced data was larger than the number of data that could not be correctly corrected at the time of immediately preceding recording. An operation of determining whether or not the re-recorded data has been correctly recorded in the recording area based on the predetermined number of times is performed. When it is determined that the data has not been recorded, the data is recorded in a spare area provided in the recording medium, and the number of data that cannot be correctly corrected by using an error correction code for the reproduced data at the time of the re-recording. It is determined whether to repeat the re-recording of the data or to record the data in the replacement area based on the, whether to repeat the re-recording of the data or to record the data in the replacement area based on the determination result An information recording method characterized by switching.

Data is recorded by irradiating the recording area of the data rewritable recording medium with laser light, the recorded data is reproduced, and the data is correctly recorded in the recording area based on the reproduced data. And when it is determined that the data could not be correctly recorded by the determination, the data is recorded in the recording area with a different pulse width from the immediately preceding recording pulse width of the recording pulse width of the data. Re-recording, reproducing the re-recorded data, performing a predetermined number of operations to determine whether or not the re-recorded data has been correctly recorded in the recording area based on the reproduced data, The maximum recording pulse width, which is the maximum value of the recording pulse widths of the data that can be correctly recorded, is stored. When data is recorded in the recording area, the recorded data is reproduced, and it is determined whether or not the data has been correctly recorded based on the reproduced data. The operation of re-recording the data with a pulse width different from that immediately before the head recording pulse width of the data recording pulse width is performed a predetermined number of times, and the data to be re-recorded during the predetermined number of operations. Recording the data in a spare area provided in the recording medium when the first recording pulse width of the recording medium becomes equal to or greater than the stored maximum recording pulse width.

A recording procedure for recording data by irradiating a computer with a laser beam on a recording area of a rewritable recording medium, reproducing the data recorded by the recording procedure, and performing the recording based on the reproduced data. A first determination procedure for determining whether or not the data has been correctly recorded in the area; and when it is determined that the data has not been correctly recorded in the first determination procedure, a first one of the recording pulse widths of the data in the recording area. Re-recording the data with a pulse width different from the immediately preceding recording pulse width of the first recording pulse, reproducing the re-recorded data, and using the error correction code of the reproduced data to correct the data. The re-recorded data is correct in the recording area based on whether or not the number has increased beyond the number of data that could not be correctly corrected at the time of the immediately preceding recording. A re-recording procedure for performing a predetermined number of operations to determine whether or not the recording has been successfully performed; A replacement recording procedure for recording the data, and data obtained by the re-recording procedure based on the number of data that could not be correctly corrected by using an error correction code for the reproduced data at the time of re-recording by the re-recording procedure. A second determination procedure for determining whether to repeat the re-recording of the data or to record the data in the replacement area according to the replacement recording procedure, and based on the determination result of the second determination procedure, Switching between repetition of re-recording and recording of the data in the replacement area by the replacement recording procedure.

A recording procedure for recording data by irradiating a computer with a laser beam on a recording area of a rewritable recording medium, reproducing the data recorded by the recording procedure, and performing the recording based on the reproduced data. A determination procedure for determining whether or not the data has been correctly recorded in the area; and when it is determined that the data has not been correctly recorded by the determination procedure, the head recording pulse width of the data recording pulse width in the recording area is set immediately before. The data is re-recorded with a pulse width different from that recorded when the data is re-recorded, the re-recorded data is reproduced, and it is determined whether or not the re-recorded data was correctly recorded in the recording area based on the reproduced data. A re-recording procedure for performing a judging operation a predetermined number of times, and a first recording pulse of data which has been re-recorded a predetermined number of times and correctly recorded by the re-recording procedure. A maximum head recording pulse width storing procedure for storing a maximum head recording pulse width which is a maximum value of the following, and when data is recorded in a recording area of a rewritable data medium by the recording procedure, The recorded data is reproduced, and it is determined whether or not the data was correctly recorded based on the reproduced data. When it is determined that the data was not correctly recorded, the first recording pulse of the recording pulse width of the data is determined. An operation of re-recording the data with a pulse width different from that immediately before the width was recorded is performed a predetermined number of times, and during the predetermined number of operations, the head recording pulse width of the data to be re-recorded is the maximum head recording pulse. A replacement unit that records the data in a replacement area provided in the recording medium when the pulse width becomes equal to or larger than the maximum head recording pulse width stored by the width storage procedure. Program to be executed by the recording procedure.

A computer-readable recording medium on which the program according to any one of claims 8, 9, 16, and 17 is recorded.