JP4098929B2 - Information recording medium, medium manufacturing apparatus, information detecting apparatus, and information recording apparatus - Google Patents

Description

一方、グルーブトラック２は、全てのシンクフレームに渡って、１４０ｋＨｚ（一のシンクフレームがその八波分に相当する周波数）の上記基本周波数を有する基本周波数信号に８４０ｋＨｚ（すなわち、基本周波数における一波中に六波が含まれる周波数）の上記副周波数を有する副周波数信号が多重された多重周波数でウォブリングされている。
【００７３】
更に、当該副周波数信号は、プリピット４に相隣接する位置（ＥＶＥＮフレームにプリピット４が形成されている場合及びＯＤＤフレームにプリピット４が形成されている場合の双方を含む。）の基本周波数信号には多重されていないと共に、後述するように当該副周波数信号を用いて記録するアドレス情報に基づいて位相変調されている。
【００７４】
そして、後述の情報記録装置において、当該基本周波数を検出することでＤＶＤ−Ｒ／Ｗ１の記録動作全般を制御するための上記記録クロック信号が生成される共に、当該副周波数信号を検出することで上記アドレス情報が取得される。
【００７５】
次に、当該グルーブトラックのウォブルの態様について、より詳細に図３を用いて説明する。
【００７６】
なお、図３上段は、上からプリピット４の形成位置並びに実際には多重されている副周波数信号及び基本周波数信号を夫々分離して示す図であり、図３下段は、副周波数信号における位相変調の態様と当該位相変調により記録されるアドレス情報との関係（実施形態では、３通りある。）を示す波形対応図である。
【００７７】
また、図３上段において、副周波数信号及び基本周波数信号を夫々示す図における一つの四角は夫々の信号における一波（一周期）を示す。
【００７８】
図３上段に示すように、プリピット４は通常はＥＶＥＮフレームのみに形成されている。
【００７９】
そして、副周波数信号は、ＥＶＥＮフレーム及びＯＤＤフレームの双方について、プリピット４が現実に形成されている位置及び形成される可能性のある位置においては基本周波数信号に多重されていない。また、副周波数信号の六波分が基本周波数信号における一波分に相当している。
【００８０】
更に、基本周波数信号については、その八波分が一のシンクフレームに相当している。
【００８１】
次に、副周波数信号の位相変調により記録されるアドレス情報について図３下段を用いて説明すると、先ず、アドレス情報におけるシンクコードを記録する場合には、図３下段左に示すように、基本周波数信号一波に相当する副周波数信号六波分のうち、最初の三波のみの位相を反転してグルーブトラック２をウォブリングさせる。
【００８２】
また、アドレス情報におけるデータ「１」を記録する場合には、図３下段右に示すように、当該副周波数信号六波分のうち、第一波、第四波及び第五波のみの位相を反転してグルーブトラック２をウォブリングさせる。
【００８３】
更に、アドレス情報におけるデータ「０」を記録する場合には、図３下段中に示すように、当該副周波数信号六波分のうち、第一波及び第六波のみの位相を反転してグルーブトラック２をウォブリングさせる。
【００８４】
ここで、副周波数信号のうち、アドレス情報の記録のために位相変調されるのは、一シンクフレーム内の基本周波数信号における最初の三波に相当する位置（すなわちプリピット４が形成されている可能性のある位置）を除くその第四波から第八波に相当する位置のいずれかとされている。
【００８５】
このとき、図３下段に示すように副周波数信号を位相変調してアドレス情報を記録する場合には、一のレコーディングセクタ内に最大で１３ビットのアドレス情報が記録できるので、上記したプリ情報の場合と異なり、例えば、四つのレコーディングセクタに相当するアドレス情報を検出した後これを復号するのみでＤＶＤ−Ｒ／Ｗ１上のアドレス情報（いわゆる絶対アドレス情報）が取得できるようなデータ構造を採用することができる。
【００８６】
なお、上述したように、一のレコ−ディングセクタにおいては、ＥＶＥＮフレームのみ又はＯＤＤフレームのみのいずれか一方にプリピット４が形成されていることに対応して、副周波数信号が位相変調されている部分についても、当該部分が、ＤＶＤ−Ｒ／Ｗ１の半径方向において、一周内側のグルーブトラック２に対応するプリピット４の位置と近接する可能性がある場合には、当該近接しない他方のシンクフレーム（ＥＶＥＮフレーム又はＯＤＤフレームのいずれか一方）に当該部分が形成される。つまり、一のレコ−ディングセクタ中ではＥＶＥＮフレームのみ又はＯＤＤフレームのみのいずれか一方に当該副周波数信号が位相変調されている部分が形成されている。
【００８７】
従って、図３において、ＥＶＥＮフレームに位相変調された副周波数信号を含むウォブルが形成された場合にはそれに隣接するＯＤＤフレームには当該ウォブルは形成されない。
【００８８】
更に、プリピット４が形成されている位置に対応するシンクフレームと副周波数信号が位相変調されているシンクフレームとは常に一致しているわけではない。
【００８９】
上記した構成により、副周波数信号を位相変調することによって記録されたアドレス情報を検出する際に、プリピット４からの悪影響を排除することができることとなる。
【００９０】
また、上記したプリピット４によりＤＶＤ−Ｒ／Ｗ１に記録されているプリ情報中におけるアドレス情報と、上記副周波数信号の位相変調によりＤＶＤ−Ｒ／Ｗ１に記録されているアドレス情報との関係については、例えば、当該アドレス情報の再生時における信頼性を向上させるべく同じアドレス情報を重畳してプリピット４及び副周波数信号の位相変調に担持させてもよいし、階層的に相互に異なるアドレス情報を夫々別個に担持させてもよい。
【００９１】
（II）カッティング装置の実施形態
次に、図２及び図３に示すプリピット４及びグルーブトラック２を、図２及び図３に示す態様で図１に示す形状に形成するための本実施形態に係るカッティング装置について、図４及び図５を用いて説明する。
【００９２】
なお、図４は実施形態のカッティング装置の全体構成を示すブロック図であり、図５はプリフォーマット用エンコーダの構成を示すブロック図である。
【００９３】
また、図４及び図５に示すカッティング装置は、本発明によりプリピット４及びウォブリングするグルーブトラック２が形成されてプリ情報及びアドレス情報が記録されたＤＶＤ−Ｒ／Ｗ１を大量生産するためのスタンパディスクを製作するためのものである。
【００９４】
先ず、カッティング装置の全体構成及び動作について、図４を用いて説明する。
【００９５】
図３に示すように、実施形態のカッティング装置Ｃは、データ発生部２０と、パラレル／シリアル変換器２１と、生成手段としてのプリフォーマット用エンコーダ２２と、クロック信号発生部２３と、形成手段としてのレーザ発生装置２４と、形成手段としての光変調器２５と、対物レンズ２６と、スピンドルモータ２９と、回転検出器３０と、回転サーボ回路３１と、送りユニット３２と、位置検出器３３と、送りサーボ回路３４と、電磁石３５と、永久磁石３６と、により構成されている。
【００９６】
また、レーザ発生装置２４は、光ビームＬ_Gを出射する出射装置２４_Gと、光ビームＬ_Lを出射する出射装置２４_Lとにより構成される。
【００９７】
更に、スタンパディスクは、スタンパディスク本体としてのガラス基盤２７と、ガラス基盤上にコーティングされたプリピット４及び各トラックを形成するためのレジスト（感光材）２８とにより構成されている。
【００９８】
次に、動作を説明する。
【００９９】
先ず、データ発生部２０は、ＤＶＤ−Ｒ／Ｗ１に記録すべきアドレス情報を含むプリ情報Ｓ_PPを生成してパラレル／シリアル変換器２１に出力する。
【０１００】
そして、パラレル／シリアル変換器２１は、当該生成されたプリ情報Ｓ_PPをパラレル／シリアル変換してプリフォーマット用エンコーダ２２へ出力する。
【０１０１】
これにより、プリフォーマット用エンコーダ２２は、シリアル化されたプリ情報Ｓ_PPに基づき、図２及び図３に示す記録フォーマットでプリピット４及びグルーブトラック２を形成するための記録プリ情報Ｓ_Rを生成して光変調器２５へ出力すると共に、後述のウォブリング信号Ｓ_Wを生成して電磁石３５へ出力する。
【０１０２】
このとき、クロック信号発生部２３は、プリフォーマッティングに使用するクロック信号ＣＬＫ（周期は上記Ｔとされている。）を生成してプリフォーマット用エンコーダ２２に出力する。
【０１０３】
一方、レーザ発生装置２４は、ＤＶＤ−Ｒ／Ｗ１の基板に対して図１に示すグルーブトラック２をウォブリングさせつつ形成するための光ビームＬ_Gを射出すると共に、図１に示すランドトラック３及びプリピット４を形成するための光ビームＬ_Lを射出する。
【０１０４】
そして、光変調器２５は、射出された光ビームＬ_L又はＬ_Gを記録プリ情報Ｓ_Rに基づいて強度変調して夫々射出する。
【０１０５】
そして、光変調器２５から射出された光ビームＬ_G及びＬ_Lは、対物レンズ２６によりスタンパディスク上に集光される。
【０１０６】
次に、これらと並行して、スピンドルモータ２９はスタンパディスクを回転させる。
【０１０７】
そして、回転検出器３０により当該スタンパディスクの回転数を検出し、当該検出された回転数に基づいて、回転サーボ回路３１によりスタンパディスクの回転をサーボ制御すると共に、スタンパディスクの一回転に一回のみ生成される一回転検出信号Ｓ_Sを生成してプリフォーマット用エンコーダ２２に出力する。
【０１０８】
更に、送りユニット３２は、螺旋状のグルーブトラック２及びランドトラック３をスタンパディスク上に形成するために、当該スタンパディスクの回転に対応してスピンドルモータ２９及びスタンパディスクを当該スタンパディスクの半径方向に移動させる。
【０１０９】
このとき、送りユニット３２の半径方向の位置は位置検出器３３により検出され、検出された送りユニット３２の位置に基づいて送りサーボ回路３４により送りユニット３２の移動をサーボ制御する。
【０１１０】
一方、電磁石３５は、上記ウォブリング信号Ｓ_Wに基づいて光ビームＬ_Gをスタンパディスクの半径方向に振動させ、上述した多重周波数でウォブリングするグルーブトラック２を形成する。
【０１１１】
このとき、光変調器２５に固定されている永久磁石３６は、当該電磁石３５との磁気的相互作用により実際に光変調器２５をスタンパディスクの半径方向に振動させて光ビームＬ_Gの照射位置を振動させることにより上記した態様でウォブリングするグルーブトラック２を形成する。
【０１１２】
ここで、光ビームＬ_Lは光変調器２５により記録プリ情報Ｓ_Rに基づいて変調されるが、光ビームＬ_Gは図示しないＤＣ（直流）駆動装置により常に一定の強度を保ちつつ且つスタンパディスクの半径方向に振動しながら当該スタンパディスクに照射される。
【０１１３】
更に、ランドトラック３を形成する光ビームＬ_Lとグルーブトラック２を形成する光ビームＬ_Gは、照射位置をスタンパディスクの半径方向にずらしつつ照射され、同心螺旋状のランドトラック３とグルーブトラック２を同時に形成していく。
【０１１４】
次に、プリフォーマット用エンコーダ２２の細部構成及び動作について、図５を用いて説明する。
【０１１５】
図５に示すように、プリフォーマット用エンコーダ２２は、フレーム信号発生器４０と、ＯＤＤ・ＥＶＥＮ判定用ゲート信号発生器４１と、判定器４２と、スイッチ４３と、記録プリ情報発生器４４と、カウンタ４５と、発生手段としてのＲＯＭ（Read Only Memory）４６と、Ｄ／Ａ変換器４７と、により構成されている。
【０１１６】
次に、動作を説明する。
【０１１７】
始めに、図５に示す構成において、スイッチ４３は通常偶数記録プリ情報Ｓ_RE側に切り換えられている。
【０１１８】
そして、上記クロック信号ＣＬＫが入力されているフレーム信号発生器４０は、当該クロック信号ＣＬＫに基づいて、図２及び図３に示す各シンクフレームに対応するタイミングにおいて、ＥＶＥＮフレームに対応するＥＶＥＮフレーム信号Ｓ_Eと、ＯＤＤフレームに対応するＯＤＤフレーム信号Ｓ_Oを夫々出力すると共に、一のＥＶＥＮフレームに対応するＥＶＥＮフレーム信号Ｓ_Eが発生する度にリセットされる図示しないＥＶＥＮフレームカウンタから出力されるＥＶＥＮフレームカウント信号Ｓ_ECを出力し、更に、夫々のレコーディングセクタの先頭を示す先頭フレーム信号Ｓ_Hを出力する。
【０１１９】
そして、ＯＤＤ・ＥＶＥＮ判定用ゲート信号発生器４１は、クロック信号ＣＬＫ、一回転検出信号Ｓ_S及びＥＶＥＮフレームカウント信号Ｓ_ECに基づいて、スタンパディスクにおける一周に対応する期間に記録するプリピット４を形成すべきシンクフレームをＥＶＥＮフレームとするか又はＯＤＤフレームとするかの判別のためのゲート信号Ｓ_Gを出力する。
【０１２０】
これらにより、判定器４２は、ＥＶＥＮフレーム信号Ｓ_E、ゲート信号Ｓ_G及び一回転検出信号Ｓ_Sに基づいて、プリピット４を形成すべきシンクフレームをＥＶＥＮフレームとするか或はＯＤＤフレームとするかを判定するための判定信号Ｓ_Jを出力する。
【０１２１】
更に、記録プリ情報発生器４４は、先頭フレーム信号Ｓ_H、ＥＶＥＮフレーム信号Ｓ_E、ＯＤＤフレーム信号Ｓ_O、クロック信号ＣＬＫ及びプリ情報Ｓ_PPに基づいて、記録情報におけるＥＶＥＮフレームに対応したプリピット４を形成するための偶数記録プリ情報Ｓ_RE及び記録情報におけるＯＤＤフレームに対応したプリピット４を形成するための奇数記録プリ情報Ｓ_ROを出力する。
【０１２２】
そして、スイッチ４３は、判定信号Ｓ_Jに基づいて、偶数記録プリ情報Ｓ_RE又は奇数記録プリ情報Ｓ_ROを選択的に切り換えて出力する。
【０１２３】
一方、カウンタ４５は、ＥＶＥＮフレーム信号Ｓ_Eを初期化信号として用いることにより初期化されつつクロック信号ＣＬＫに含まれるクロック数をカウントし、シンクフレームの先頭のクロック数となる度にカウント信号Ｓ_Cを出力する。
【０１２４】
そして、ＲＯＭ４６は、カウント信号Ｓ_C及びプリ情報Ｓ_PPに基づいて、グルーブトラック２を図２及び図３に示す多重周波数を有するウォブルでウォブリングさせるための予め記憶されているウォブリング信号Ｓ_W （ディジタル信号）を出力する。
【０１２５】
これにより、Ｄ／Ａ変換器４７は、出力されたウォブリング信号Ｓ_Wを光変調器２５を振動させるためのアナログ信号であるウォブリング信号Ｓ_Wに変換して電磁石３５へ出力する。
【０１２６】
ここで、当該プリフォーマット用エンコーダ２２のうち、フレーム信号発生器４０、ＯＤＤ・ＥＶＥＮ判定用ゲート信号発生器４１、判定器４２及び記録プリ情報発生器４４の構成及び動作の細部については、例えば、本願の出願人により先に出願された特願平８−３１０９４１号の明細書における段落番号[００６７]乃至[００９０]に記載されている内容をそのまま適用することができる。
【０１２７】
次に、上記ウォブリング信号Ｓ_Wを生成するための本発明に係るカウンタ４５、ＲＯＭ４６及びＤ／Ａ変換器４７の動作について、図２、図３及び図５を用いて詳説する。
【０１２８】
先ず、カウンタ４５は、入力されているＥＶＥＮフレーム信号Ｓ_Eを初期化信号として、当該ＥＶＥＮフレーム信号Ｓ_Eが入力される度に初期化されつつクロック信号ＣＬＫのクロック数をカウントし、その計数値をカウント信号Ｓ_Cとして出力する。
【０１２９】
そして、上記カウント信号Ｓ_C及びプリ情報Ｓ_PPは、ＲＯＭ４６に対してそのアドレスデータとして入力され、これによりＲＯＭ４６は、当該カウント信号Ｓ_C及びプリ情報Ｓ_PPの内容に対応して予め設定され当該ＲＯＭ４６内にテーブル化されて記憶されている出力値をウォブリング信号Ｓ_Wとして出力する。
【０１３０】
ここで、本実施形態では、グルーブトラック２のウォブリング周波数については、上記副周波数信号により記録するアドレス情報の種類に応じて、図３下段に示すようなウォブルとすべく、上記ウォブリング信号Ｓ_Wを出力するためのテーブルがＲＯＭ４６に記憶されており、上記カウント信号Ｓ_C及びプリ情報Ｓ_PPに基づいて当該テーブルの内容をウォブリング信号Ｓ_Wとして出力する。
【０１３１】
なお、具体的なＲＯＭ４６における記憶の形態としては、例えば、プリ情報Ｓ_PPを記録すべきアドレス情報におけるＭＳＢ（Most Significant Bit）とし、カウント信号Ｓ_Cを当該アドレス情報におけるＭＳＢ以外の桁（２ＳＢ、３ＳＢ……ＬＳＢ）として使用し、ＲＯＭ４６内の所定のアドレス毎に図３下段に夫々示すウォブルに対応するデータを記憶しておき、入力されるプリ情報Ｓ_PPとカウンタ信号Ｓ_Cに基づいてこれらのうちのいずれかをウォブリング信号Ｓ_Wとして読み出せばよい。
【０１３２】
より具体的には、例えば、記録すべきアドレス情報が「０」であって、それを示す副周波数信号を図３上段に示す四波目の基本周波数信号に多重する場合、カウンタ４５のカウント値が、当該四波目の基本周波数信号が開始されるタイミングである「５５８（（１４８８／８）×３）」となったときに、対応するカウント信号Ｓ_Cを出力し、当該カウント信号Ｓ_Cが出力されたタイミングから図３下段中に示すウォブルに対応するデータをウォブリング信号Ｓ_Wとして読み出して出力する。
【０１３３】
一方、記録すべきアドレス情報が「１」であって、それを示す副周波数信号を同様に図３上段に示す四波目の基本周波数信号に多重する場合、カウンタ４５のカウント値が「５５８」となったときに、対応するカウント信号Ｓ_Cを出力し、当該カウント信号Ｓ_Cが出力されたタイミングから図３下段右に示すウォブルに対応するデータをウォブリング信号Ｓ_Wとして読み出して出力する。
【０１３４】
同様に、記録すべきアドレス情報がシンクコードであって、それを示す副周波数信号を図３上段に示す四波目の基本周波数信号に多重する場合、カウンタ４５のカウント値が「５５８」となったときに、対応するカウント信号Ｓ_Cを出力し、当該カウント信号Ｓ_Cが出力されたタイミングから図３下段左に示すウォブルに対応するデータをウォブリング信号Ｓ_Wとして読み出して出力する。
【０１３５】
この後、当該ウォブリング信号Ｓ_WがＤ／Ａ変換器４７によりアナログ信号に変換され、当該アナログ信号に変換されたウォブリング信号Ｓ_Wに基づく電磁石３５と永久磁石３６の動作により、光変調器２５がスタンパディスクの半径方向に移動（振動）され、これにより、所望の多重周波数でウォブリングするグルーブトラック２が形成されることとなる。
【０１３６】
以上説明したプリフォーマット用エンコーダ２２の動作により、副周波数信号によりアドレス情報が担持されている図２及び図３に示すウォブルでグルーブトラック２をスタンパディスク上に形成するための上記ウォブリング信号Ｓ_Wが生成されるのである。
【０１３７】
（III）情報記録装置の実施形態
次に、上述した構成を有するＤＶＤ−Ｒ／Ｗ１に対して記録情報を記録するための本発明に係る情報記録装置の実施形態について、図６及び図７を用いて説明する。
【０１３８】
始めに、実施形態に係る情報記録装置の構成について、図６及び図７を用いて説明する。
【０１３９】
なお、図６は実施形態に係る情報記録装置の全体構成を示すブロック図であり、図７は情報記録装置の細部構成を示すブロック図である。
【０１４０】
図６に示すように、実施形態の情報記録装置Ｓは、検出手段及び記録手段としてのピックアップ５０と、ドライバ５１と、ストラテジ回路５２と、ＤＶＤエンコーダ５３と、バンドパスフィルタ５４と、抽出手段としてのトラップ回路５５と、プリピット検出部５６と、位相比較部５７と、位相シフタ５８と、再生手段としてのプリピットデコーダ５９と、第２再生手段としての位相変調デコーダ６０と、生成手段としてのＰＬＬ（Phase Locked Loop）部６１と、スピンドル制御部６２と、ＣＰＵ６３と、スピンドルモータ６４と、第１ウォブルＰＬＬ部ＷＰ１と、第２ウォブルＰＬＬ部ＷＰ２と、により構成されている。
【０１４１】
また、第１ウォブルＰＬＬ部ＷＰ１及び第２ウォブルＰＬＬ部ＷＰ２は、基本的には同様の構成を有しており、具体的には図７（ａ）に示すように、分周器６５、６６及び８０と、位相比較部６７と、イコライザ６８と、ＶＣＯ（Voltage Controlled Oscillator）６９とにより構成されている。
【０１４２】
更に、スピンドル制御部ＳＰは、参照信号発生部７０と、分周器７１及び７２と、位相比較部７３と、イコライザ７４と、スピンドルサーボ部７５と、により構成されている。
【０１４３】
次に、情報記録装置Ｓの動作について、図６及び図７を用いて説明する。
【０１４４】
ＤＶＤ−Ｒ／Ｗ１に記録すべき記録情報としての記録データＳrは、外部から入力され、ＤＶＤエンコーダ１５において後述する記録クロック信号Ｓwc及び後述する制御信号Ｓctに基づいて８／１６変調され、変調信号Ｓecとしてストラテジ回路１６に出力される。
【０１４５】
そして、当該ストラテジ回路１６において、上記記録クロック信号Ｓwcに基づいてＤＶＤ−Ｒ／Ｗ１上に形成される記録ピットの形状を調整するために波形変換され、記録信号Ｓttとしてドライバ５１へ出力される。
【０１４６】
そして、ドライバ５１において記録信号Ｓttが増幅されて増幅記録信号Ｓdpが生成されピックアップ５０に出力される。
【０１４７】
その後、ピックアップ５０は、増幅記録信号Ｓdpにより強度変調された光ビームＢを記録データＳrに対応する記録ピットを形成すべきＤＶＤ−Ｒ／Ｗ１上のグルーブトラック２に照射し、当該記録を行う。
【０１４８】
一方、ピックアップ５０は、記録データＳrに対応する記録ピットの形成に先立ち、光ビームＢをＤＶＤ−Ｒ／Ｗ１に照射し（図１参照）、上記プリピット４及びグルーブトラック２のウォブルにより変調された当該光ビームＢの反射光を受光して、上記プリピット４及びグルーブトラック２のウォブリングの情報を含む検出信号Ｓpを生成し、プリピット検出部５６、バンドパスフィルタ５４及びトラップ回路５５へ出力する。
【０１４９】
このとき、当該検出信号Ｓpとしては、グルーブトラック２のウォブリングに対応する多重周波数（１４０キロヘルツ＋８４０キロヘルツ）を有すると共に、プリピット４が形成されているタイミングにおいてインパルス的な波形（図３中符号４参照）を含む検出信号Ｓpが生成される。
【０１５０】
次に、１４０キロヘルツの信号のみを通過させる特性を有するバンドパスフィルタ５４は、検出信号Ｓpからグルーブトラック２における基本周波数（１４０キロヘルツ）に対応するウォブル検出信号Ｓwp1を抽出し、第１ウォブルＰＬＬ部ＷＰ１内の分周器３０に出力する。
【０１５１】
そして、第１ウォブルＰＬＬ部ＷＰ１は、当該ウォブル検出信号Ｓwp1に基づいて、グルーブトラック２のウォブルにおける基本周波数信号に同期すると共に上記Ｔの逆数に相当する周波数を有するクロック信号Ｓclと、基本周波数信号に同期すると共に当該基本周波数信号と同様の周波数を有するクロック信号Ｓwclと、を生成する。そして、クロック信号Ｓclをプリピット検出部５６、位相シフタ５８及びプリピットデコーダ５９に出力すると共に、クロック信号Ｓwclをプリピット検出部５６、位相比較部５７、位相シフタ５８、プリピットデコーダ５９及びスピンドル制御部ＳＰ内の分周器７１へ夫々出力する。
【０１５２】
このため、第１ウォブルＰＬＬ部ＷＰ１では、図７（ａ）に示すように、当該クロック信号Ｓclを分周期８０にて分周することにより得られる上記クロック信号Ｓwclを更に分周器６６により分周した信号とウォブル検出信号Ｓwp1を分周器６５により分周した信号とを位相比較部６７により位相比較し、その比較結果をイコライザ６８にて周波数補正した信号を用いてＶＣＯ６９を駆動し、上記クロック信号Ｓclを生成している。
【０１５３】
一方、１４０キロヘルツの信号を遮断する特性を有するトラップ回路５５は、検出信号Ｓpからグルーブトラック２における基本周波数信号（１４０キロヘルツ）を除いた信号（上記副周波数信号（８４０キロヘルツ））に対応すると共にその位相変調によりアドレス情報を担持したウォブル検出信号Ｓwp2を生成し、第２ウォブルＰＬＬ部ＷＰ２及び位相変調デコーダ６０に出力する。
【０１５４】
これにより、第２ウォブルＰＬＬ部ＷＰ２は、当該ウォブル検出信号Ｓwp2に基づいて、グルーブトラック２のウォブルにおける副周波数信号に同期すると共にそれと同様の周波数を有したクロック信号Ｓapを生成して位相変調デコーダ６０へ出力する。
【０１５５】
このため、第２ウォブルＰＬＬ部ＷＰ２では、上記第１ウォブルＰＬＬ部ＷＰ１とほぼ同様の構成及び動作により上記クロック信号Ｓapを生成している。
【０１５６】
一方、上記クロック信号Ｓwclが入力されるスピンドル制御部ＳＰは、当該クロック信号Ｓwclに基づいてスピンドルモータ１９の回転数を制御するための駆動制御信号Ｓdcを生成してスピンドルモータ６４へ出力する。
【０１５７】
このため、スピンドル制御部ＳＰでは、参照信号発生部７０から出力されるスピンドルモータ６４の駆動用基準信号を分周器７２にて分周し、その分周結果と上記クロック信号Ｓwclを分周器７１にて分周した信号とを位相比較部７３にて位相比較し、その比較結果の周波数特性をイコライザ７４により補正した信号をスピンドルサーボ部７５へ入力し、これに基づき、当該スピンドルサーボ部７５がＤＶＤ−Ｒ／Ｗ１が一定線速度で回転するようにスピンドルモータ１９を駆動するための上記駆動制御信号Ｓdcを生成してスピンドルモータ６４に出力する。
【０１５８】
次に、プリピット検出部５６は、上記クロック信号Ｓwclにより示されるタイミングに基づき、クロック信号Ｓclを補助的に使用しつつ、検出信号Ｓpに含まれるプリピット４に対応したプリピット信号Ｓpp（図３上段参照）を上記ラジアルプッシュプル法により抽出し、位相比較部５７及びプリピットデコーダ５９へ出力する。
【０１５９】
次に、上記プリピット信号Ｓpp及びクロック信号Ｓwclが入力される位相比較部５７は、夫々の信号の位相を比較し、比較信号Ｓcpを生成して位相シフタ５８へ出力する。
【０１６０】
そして、位相シフタ５８は、クロック信号Ｓclを補助的に使用しつつ、クロック信号Ｓwclの位相を比較信号Ｓcpに対応してシフトし、位相シフト信号Ｓpsを生成してＰＬＬ部６１へ出力する。
【０１６１】
これにより、ＰＬＬ部６１は、位相シフト信号Ｓpsに基づいて、上記クロック信号Ｓclと同様に周期Ｔを有する上記記録クロック信号Ｓwcを生成してＤＶＤエンコーダ５３及びストラテジ回路５２へ出力すると共に、情報記録装置Ｓ内の必要な部材へ出力する。
【０１６２】
一方、クロック信号Ｓcl及びＳwcl並びにプリピット信号Ｓppが入力されるプリピットデコーダ５９は、当該クロック信号Ｓclを補助的に使用しつつ、当該クロック信号Ｓwclにより示されるタイミングに基づいてプリピット信号Ｓppを復号し、プリピット４として担持されていたアドレス情報を含むプリ情報を取得して、復号プリピット信号ＳpadとしてＣＰＵ６３へ出力する。
【０１６３】
更に、例えば同期検波器等からなる位相変調デコーダ６０は、クロック信号Ｓapを基準クロック信号として用いつつウォブル検出信号Ｓwp2に含まれている位相変調部分（図３下段参照）の情報からアドレス情報を復号し、復号アドレス信号ＳhadとしてＣＰＵ６３へ出力する。
【０１６４】
そして、ＣＰＵ６３は、当該復号プリピット信号Ｓpadに含まれているアドレス情報及び復号アドレス信号Ｓhadにより示されるアドレス情報に基づいて、記録データＳrを記録すべきＤＶＤ−Ｒ／Ｗ１上の記録位置を認識し、当該記録位置に必要な記録データＳrが記録されるようにＤＶＤエンコーダ５３を制御するための上記制御信号Ｓctを生成して当該ＤＶＤエンコーダ５３に出力する。
【０１６５】
また、ＣＰＵ６３は、この他に、復号プリピット信号Ｓpadに含まれているアドレス情報以外の例えばピックアップ５０における光ビームＢの照射強度を設定するための情報を用いて当該照射強度を有する光ビームＢを射出するようにピックアップ５０を制御する等の記録動作全体の制御を行う。
【０１６６】
以上説明したように、実施形態のＤＶＤ−Ｒ／Ｗ１、カッティング装置Ｃ及び情報記録装置Ｓの動作によれば、プリピット４に相隣接するグルーブトラック２におけるウォブルが基本周波数信号のみに対応しているので、プリピット４を検出する際に副周波数信号からの悪影響を防止できる。
【０１６７】
また、副周波数信号がアドレス情報に基づいて位相変調されているので、プリ情報以外のアドレス情報をもウォブリングによりＤＶＤ−Ｒ／Ｗ１に予め記録させておき、更に記録データＳrの記録時において当該アドレス情報を安定に検出することができる。
【０１６８】
更に、ＤＶＤ−Ｒ／Ｗ１上に螺旋状にグルーブトラック２及びランドトラック３が形成されており、プリピット４が奇数番目のシンクフレーム又は偶数番目のシンクフレームのいずれか一方が記録されるべきグルーブトラック２に相隣接するランドトラック３上にのみ形成されており、更に位相変調された副周波数信号を含む多重周波数信号に対応したウォブルが、ＯＤＤフレーム又はＥＶＥＮフレームのいずれか一方が記録されるべきグルーブトラック２上の領域内にのみ設けられているので、記録データＳrの記録時において、プリピット４の検出と位相変調された副周波数信号に対応したウォブルの検出とが相互に悪影響を及ぼし合うことを防止できる。
【０１６９】
なお、図６に示した情報記録装置Ｓの例では、グルーブトラック２のウォブルから基本周波数信号を抽出し、これから記録クロック信号Ｓwcを生成したが、これ以外に、トラップ回路５５及び第２ウォブルＰＬＬ部ＷＰ２により抽出される副周波数信号を用いて、位相比較部５７及び位相シフタ５８並びにＰＬＬ部６１により記録クロック信号を生成するように構成することもできる。
【０１７０】
この場合には、基本周波数が１４０キロヘルツであり、更に副周波数が８４０キロヘルツであるので、副周波数が基本周波数の６倍であることとなり、十分に精度及び信頼性の高い記録クロック信号Ｓwcが記録データＳrの記録時に得られると共に、副周波数信号が記録データＳrの変調周波数帯域に影響を及ぼすことを防止できる。
【０１７１】
なお、このときに、当該副周波数信号の周波数は、上述した実施形態における８４０キロヘルツ以外に、基本周波数信号の周波数に対して二以上の整数倍の周波数であればよく、更に言えば、基本周波数信号より高い周波数であればよいこととなる。
【０１７２】
この場合には、基本周波数より高い周波数を有する副周波数信号を抽出して記録クロック信号を生成することとなるので、基本周波数信号に基づいて生成された記録クロック信号Ｓwcよりも高い周波数を有する記録クロック信号が得られることとなり、高精度且つ高信頼性を有する記録クロック信号に基づいて記録データＳrの記録を行うことができる。
【０１７３】
更に、上述した各実施形態は、複数回の記録が可能なＤＶＤ−Ｒ／Ｗ１に対して本発明を適用した場合について説明したが、これ以外に、一回のみ記録が可能なＤＶＤ−Ｒに対して本発明を適用することも同様に可能である。
【０１７４】
【発明の効果】
以上説明したように、請求項１に記載の発明によれば、基本信号より高い周波数を有する副信号が多重されたウォブリング信号に対応した蛇行波形を有して情報トラックが形成されているので、記録情報の記録時において当該ウォブリング信号を検出し更に当該副信号を抽出して記録基準信号を生成することができる。
【０１７５】
従って、高精度且つ高信頼性を有する記録基準信号に基づいて記録情報の記録を行うことができる。
【０１７６】
請求項２に記載の発明によれば、請求項１に記載の発明の効果に加えて、プリピットに相隣接する情報トラックにおける蛇行波形が基本信号のみに対応しているので、記録情報の記録時において、プリピットを検出する際に副信号からの悪影響を防止できる。
【０１７７】
請求項３に記載の発明によれば、請求項１又は２に記載の発明の効果に加えて、副信号が所定の情報に基づいて位相変調されているので、制御情報以外の所定の情報をも情報記録媒体に予め記録させておくことができる。
【０１７８】
請求項４に記載の発明によれば、請求項３に記載の発明の効果に加えて、情報記録媒体が螺旋状に情報トラック及び隣接トラックが形成された円盤状情報記録媒体であり、プリピットが奇数番目の情報単位又は偶数番目の情報単位のいずれか一方が記録されるべき情報トラックに相隣接する隣接トラック上にのみ形成されており、更に位相変調された副信号を含むウォブリング信号に対応した蛇行波形が、記録情報のうち奇数番目の情報単位又は偶数番目の情報単位のいずれか一方が記録されるべき情報トラック上の領域内にのみ設けられているので、記録情報の記録時において、プリピットの検出と位相変調された副信号に対応した蛇行波形の検出とが相互に悪影響を及ぼし合うことを防止できる。
【０１７９】
請求項５に記載の発明によれば、請求項３又は４に記載の発明の効果に加えて、所定の情報が制御情報と共に記録情報を記録する際に再生されることにより当該記録情報の記録の制御に用いられる所定の情報であるので、制御情報の他に、記録の制御に用いることができる所定の情報を更に情報記録媒体に担持させることができる。
【０１８０】
請求項６に記載の発明によれば、請求項１から５のいずれか一項に記載の発明の効果に加えて、情報記録媒体がＤＶＤ−Ｒ／Ｗであると共に、基本周波数が１４０キロヘルツであり、更に副周波数が８４０キロヘルツであるので、副周波数が基本周波数の６倍であることとなり、十分に精度及び信頼性の高い記録基準信号が記録情報の記録時に得られると共に、副信号が記録情報の変調周波数帯域に影響を及ぼすことを防止できる。
【０１８１】
請求項７に記載の発明によれば、基本信号より高い周波数を有する副信号が多重されたウォブリング信号に対応した蛇行波形を有した情報トラックを形成することができるので、情報記録媒体に対する記録情報の記録時において当該ウォブリング信号を検出し更に当該副信号を抽出して記録基準信号を生成することができる。
【０１８２】
従って、高精度且つ高信頼性を有する記録基準信号に基づいて記録情報の記録を行うことができる。
【０１８３】
請求項８に記載の発明によれば、請求項７に記載の発明の効果に加えて、プリピットに相隣接する情報トラックにおける蛇行波形が基本信号のみに対応することとなるので、記録情報の記録時において、プリピットを検出する際に副信号からの悪影響を防止できる。
【０１８４】
請求項９に記載の発明によれば、請求項７又は８に記載の発明の効果に加えて、副信号が所定の情報に基づいて位相変調されているので、制御情報以外の所定の情報をも情報記録媒体に予め記録することができる。
【０１８５】
請求項１０に記載の発明によれば、請求項９に記載の発明の効果に加えて、情報記録媒体が螺旋状に情報トラック及び隣接トラックが形成された円盤状情報記録媒体であり、記録情報が複数の情報単位により構成されており、更に奇数番目の情報単位又は偶数番目の情報単位のいずれか一方が記録されるべき情報トラックに相隣接する隣接トラック上にのみプリピットを形成すると共に、位相変調された副信号を含むウォブリング信号に対応した蛇行波形を、記録情報のうち奇数番目の情報単位又は偶数番目の情報単位のいずれか一方が記録されるべき情報トラック上の領域内にのみ設けるので、記録情報の記録時において、プリピットの検出と位相変調された副信号に対応した蛇行波形の検出とが相互に悪影響を及ぼし合うことを防止できる。
【０１８６】
請求項１１に記載の発明によれば、請求項９又は１０に記載の発明の効果に加えて、所定の情報が制御情報と共に記録情報を記録する際に再生されることにより当該記録情報の記録の制御に用いられる所定の情報であるので、制御情報の他に、記録の制御に用いることができる所定の情報を更に情報記録媒体に担持させることができる。
【０１８７】
請求項１２に記載の発明によれば、請求項７から１１のいずれか一項に記載の発明の効果に加えて、情報記録媒体がＤＶＤ−Ｒ／Ｗであると共に、基本周波数が１４０キロヘルツであり、更に副周波数が８４０キロヘルツであるので、副周波数が基本周波数の６倍であることとなり、十分に精度及び信頼性の高い記録基準信号が記録情報の記録時に得られると共に、副信号が記録情報の変調周波数帯域に影響を及ぼすことを防止できる。
【０１８８】
請求項１３に記載の発明によれば、基本信号より高い周波数を有する副信号が多重されたウォブリング信号に対応した蛇行波形を有して情報トラックが形成されており、当該ウォブリング信号を検出し更に当該副信号を抽出して記録基準信号を生成するので、高精度且つ高信頼性を有する記録基準信号に基づいて記録情報の記録を行うことができる。
【０１８９】
請求項１４に記載の発明によれば、請求項１３に記載の発明の効果に加えて、プリピットに相隣接する情報トラックにおける蛇行波形が基本信号のみに対応しているので、プリピットを検出する際に副信号からの悪影響を防止できる。
【０１９０】
請求項１５に記載の発明によれば、請求項１３又は１４に記載の発明の効果に加えて、副信号が所定の情報に基づいて位相変調されていると共に、検出されたウォブリング信号から所定の情報を抽出するので、制御情報以外の所定の情報をも情報記録媒体から取得することができる。
【０１９１】
請求項１６に記載の発明によれば、請求項１５に記載の発明の効果に加えて、情報記録媒体が螺旋状に情報トラック及び隣接トラックが形成された円盤状情報記録媒体であり、記録情報が複数の情報単位により構成されていると共に、プリピットが奇数番目の情報単位又は偶数番目の情報単位のいずれか一方が記録されるべき情報トラックに相隣接する隣接トラック上にのみ形成されており、更に位相変調された副信号を含むウォブリング信号に対応した蛇行波形が、記録情報のうち奇数番目の情報単位又は偶数番目の情報単位のいずれか一方が記録されるべき情報トラック上の領域内にのみ設けられているので、プリピットの検出と位相変調された副信号に対応した蛇行波形の検出とが相互に悪影響を及ぼし合うことを防止できる。
【０１９２】
請求項１７に記載の発明によれば、請求項１５又は１６に記載の発明の効果に加えて、所定の情報が制御情報と共に記録情報を記録する際に再生されることにより当該記録情報の記録の制御に用いられる所定の情報であると共に、これを再生するので、制御情報の他に記録の制御に用いることができる所定の情報を更に情報記録媒体から取得することができる。
【０１９３】
請求項１８に記載の発明によれば、請求項１３から１７のいずれか一項に記載の発明の効果に加えて、情報記録媒体がＤＶＤ−Ｒ／Ｗであると共に、基本周波数が１４０キロヘルツであり、更に副周波数が８４０キロヘルツであるので、副周波数が基本周波数の６倍であることとなり、十分に精度及び信頼性の高い記録基準信号が得られると共に、副信号が記録情報の変調周波数帯域に影響を及ぼすことを防止できる。
【０１９４】
請求項１９に記載の発明によれば、高い周波数を有する副信号を抽出して得られる記録基準信号に基づいて記録情報を記録するので、より正確に記録情報の記録ができると共に、制御情報以外の所定の情報を用いて効率的且つ更に正確に記録情報を記録することができる。
【図面の簡単な説明】
【図１】実施形態のＤＶＤ−Ｒ／Ｗの構造を示す図であり、（ａ）は実施形態のＤＶＤ−Ｒ／Ｗの構造を示す斜視図であり、（ｂ）は当該斜視図における矢印方向からグルーブトラックを見た断面図である。
【図２】ＤＶＤ−Ｒ／Ｗに記録されているプリ情報等の記録フォーマットを示す模式図である。
【図３】ＤＶＤ−Ｒ／Ｗに記録されている記録フォーマットを説明する模式図である。
【図４】実施形態のカッティング装置の全体構成を示すブロック図である。
【図５】プリフォーマット用エンコーダの構成を示すブロック図である。
【図６】実施形態に係る情報記録装置の全体構成を示すブロック図である。
【図７】実施形態に係る情報記録装置の細部構成を示すブロック図であり、（ａ）はウォブルＰＬＬ部の構成を示すブロック図であり、（ｂ）はスピンドル制御部の構成を示すブロック図である。
【符号の説明】
１…ＤＶＤ−Ｒ／Ｗ
２…グルーブトラック
３…ランドトラック
４…プリピット
５、８…保護層
６…反射層
７…保護膜
９…基板
９Ａ…樹脂層
１１…記録層
２０…データ生成部
２１…パラレル／シリアル変換器
２２…プリフォーマット用エンコーダ
２３…クロック信号発生部
２４、２４_G、２４_L…レーザ発生装置
２５…光変調器
２６…対物レンズ
２７…ガラス基盤
２８…レジスト
２９、６４…スピンドルモータ
３０…回転検出器
３１…回転サーボ回路
３２…送りユニット
３３…位置検出器
３４…送りサーボ回路
４０…フレーム信号発生器
４１…ＯＤＤ・ＥＶＥＮ判定用ゲート信号発生器
４２…判定器
４３…スイッチ
４４…記録プリ情報発生器
５０…ピックアップ
５１…ドライバ
５２…ストラテジ回路
５３…ＤＶＤエンコーダ
５４…バンドパスフィルタ
５５…トラップ回路
５６…プリピット検出部
５７、６７、７３…位相比較部
５８…位相シフタ
５９…プリピットデコーダ
６０…位相変調デコーダ
６１…ＰＬＬ部
６２…スピンドル制御部
６３…ＣＰＵ
６５、６６、７１、７２、８０…分周器
６８、７４…イコライザ
６９…ＶＣＯ
７０…参照信号発生部
７５…スピンドルサーボ部
Ｂ…光ビーム
Ｃ…カッティング装置
Ｓ…情報記録装置
ＳＰ…光スポット
ＳＹ…同期情報
ＣＬＫ…クロック信号
ＷＰ１…第１ウォブルＰＬＬ部
ＷＰ２…第２ウォブルＰＬＬ部
Ｌ_L、Ｌ_G、Ｂ…光ビーム
Ｓ_PP…プリ情報
Ｓ_R…記録プリ情報
Ｓ_S…一回転検出信号
Ｓ_E…ＥＶＥＮフレーム信号
Ｓ_O…ＯＤＤフレーム信号
Ｓ_J…判定信号
Ｓ_W…ウォブリング信号
Ｓ_G…ゲート信号
Ｓ_H…先頭フレーム信号
Ｓ_RE…偶数記録プリ情報
Ｓ_RO…奇数記録プリ情報
Ｓ_EC…ＥＶＥＮフレームカウント信号
Ｓ_C…カウント信号
Ｓr…記録データ
Ｓwc…記録クロック信号
Ｓec…変調信号
Ｓtt…記録信号
Ｓdp…増幅記録信号
Ｓp…検出信号
Ｓwp1、Ｓwp2…ウォブル検出信号
Ｓcl、Ｓwcl、Ｓap…クロック信号
Ｓdc…駆動制御信号
Ｓpp…プリピット信号
Ｓcp…比較信号
Ｓps…位相シフト信号
Ｓpad…復号プリピット信号
Ｓhad…復号アドレス信号
Ｓct…制御信号[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of an information recording medium, a medium manufacturing apparatus, an information detection apparatus, and an information recording apparatus including the information detection apparatus. Recordable information recording medium in which control information used for recording information recording control is recorded in advance, medium manufacturing apparatus for manufacturing the information recording medium, and recording information from the information recording medium The present invention belongs to a technical field of an information detection device for detecting control information and an information recording device including the information detection device.
[0002]
[Prior art]
In recent years, DVD-R (DVD-Recordable), which is an optical disc having a recording density improved several times compared to a conventional CD-R (Compact Disk-Recordable) as a recordable optical disc. ) Or DVD-R / W (DVD-ReWritable, a DVD that can be overwritten multiple times) is being developed. This DVD-R or DVD-R / W (hereinafter referred to as the conventional technology column) In an information recording apparatus for recording recorded information on a DVD-R / W or the like) (no recorded information is recorded on the DVD-R / W or the like in advance as discretely arranged prepits. The address information recorded (in the state) (address information indicating the position on the DVD-R / W etc. where the recording information is to be recorded) is detected, and the recording position of the recording information is searched based on the detected address information do it And it has a configuration for recording the recording information.
[0003]
The address information recorded by this pre-pit is standardized for each preset unit (for example, an ECC (Error Correcting Code) block as an error correction unit in the recorded information). The entire address information can be acquired only after the prepits corresponding to all the units are detected.
[0004]
Further, in the DVD-R / W or the like, an information track on which recording information is to be recorded is wobbled (meandering) at a fixed single frequency, and the wobbling frequency is detected when the recording information is recorded. The recording is performed by generating a recording clock signal serving as a reference at the time of recording.
[0005]
According to this configuration, even if the rotation of the DVD-R / W or the like deviates from the steady speed due to disturbance, it is possible to shift the frequency of the recording clock signal in accordance with the deviation, and thereby the DVD-R / W. Thus, it is possible to generate a recording clock signal having a frequency that is always synchronized with the rotation of the recording medium and accurately record the recording information.
[0006]
[Problems to be solved by the invention]
However, since the single frequency in the wobbling of the conventional information track is a low frequency of, for example, about 140 kilohertz, there is a problem that a recording clock signal with higher accuracy than the recording density may not be generated at the time of recording. was there.
[0007]
Further, since the address information is recorded in advance only by using the pre-pits, there is a problem that the amount of information is limited.
[0008]
Further, since the address information can be acquired only after detecting an amount of pre-pits corresponding to a preset unit such as the ECC block described above, it is not possible to record the recorded information at a high speed by performing a high-speed address search. There was also a problem.
[0009]
Therefore, the present invention has been made in view of the above problems, and the problem is that recording information is recorded based on a recording clock signal having high accuracy and high reliability when recording information is recorded. Information recording medium capable of acquiring more address information more accurately in a shorter time, medium manufacturing apparatus for manufacturing the information recording medium, and recording information An object of the present invention is to provide an information detection device for detecting the control information from an information recording medium and an information recording device including the information detection device.
[0010]
[Means for Solving the Problems]
  In order to solve the above problems, the invention according to claim 1 is formed adjacent to an information track such as a groove track on which recording information is recorded, and is reproduced when the recording information is recorded. With respect to a basic signal having a predetermined basic frequency and an adjacent track such as a land track in which control information used for recording control of the recording information is recorded by prepits, And the information track formed with a meandering waveform corresponding to a wobbling signal obtained by multiplexing sub-signals having a high and constant sub-frequency, andWithThe meandering waveform in the information track at a position adjacent to the prepit in the information track is formed corresponding to the wobbling signal including only the basic signal.
[0011]
Therefore, since the information track has a meandering waveform corresponding to the wobbling signal multiplexed with the sub-signal having a higher frequency than the basic signal, the wobbling signal is detected when recording information is recorded, and the sub-signal is further detected. By extracting a signal and generating a recording reference signal, recording information can be recorded based on the recording reference signal having high accuracy and high reliability.
[0013]
Therefore, since the meandering waveform in the information track adjacent to the pre-pit corresponds only to the basic signal, it is possible to prevent the adverse effect from the sub-signal when detecting the pre-pit when recording the recording information.
[0014]
  To solve the above problems, the claims2The invention described in claim1In the information recording medium described in (1), the sub-signal is phase-modulated based on predetermined information set in advance.
[0015]
Therefore, predetermined information other than the control information can be recorded in advance on the information recording medium.
[0016]
  To solve the above problems, the claims3The invention described in claim2In the information recording medium described in the above, the information recording medium is a disc-shaped information recording medium in which the information track and the adjacent track are formed in a spiral shape, and the recording information is configured by a plurality of information units, The pre-pit is formed only on the adjacent track adjacent to the information track on which either the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded, The meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal is the information track in which either the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded. It is provided only in the upper area.
[0017]
Therefore, for example, recording is performed in comparison with the case where a wobble waveform corresponding to a pre-pit and a phase-modulated sub-signal is formed only on an adjacent track adjacent to an information track on which an even-numbered information unit is to be recorded. When recording information, it is possible to prevent the detection of the prepits and the detection of the meander waveform corresponding to the phase-modulated sub-signal from adversely affecting each other.
[0018]
  To solve the above problems, the claims4The invention described in claim2 or 3In the information recording medium described in (1), the predetermined information is configured to be predetermined information used for controlling recording of the recording information by being reproduced when the recording information is recorded together with the control information. The
[0019]
Therefore, in addition to the control information, predetermined information that can be used for recording control can be further carried on the information recording medium.
[0020]
  To solve the above problems, the claims5The invention according to claim 1 is from4The information recording medium according to any one of the above, wherein the information recording medium is a DVD-R / W, the fundamental frequency is 140 kilohertz, and the sub-frequency is 840 kilohertz. .
[0021]
Therefore, since the sub-frequency is six times the fundamental frequency, a sufficiently accurate and reliable recording reference signal can be obtained when recording information, and the sub-signal affects the modulation frequency band of the recording information. Can be prevented.
[0022]
  To solve the above problems, the claims6The medium manufacturing apparatus for manufacturing the information recording medium according to claim 1, wherein the wobbling signal generating means such as a ROM and a prepit signal for forming the prepit are generated. A generating means such as a pre-format encoder and the wobbling signal are generated from the generating means, and the information track is formed by wobbling corresponding to the generated wobbling signal, and the generated pre-pit signal Forming means such as an optical modulator for forming the adjacent track while forming the prepit based onWithThe wobbling signal corresponding to the meandering waveform in the information track at a position adjacent to the prepit in the information track is configured to include only the basic signal.
[0023]
Therefore, an information track having a meandering waveform corresponding to a wobbling signal multiplexed with a sub-signal having a higher frequency than the basic signal can be formed, so that the wobbling signal is detected when recording information is recorded on the information recording medium. Further, by extracting the sub-signal and generating a recording reference signal, recording information can be recorded based on the recording reference signal having high accuracy and high reliability.
[0025]
Therefore, since the meandering waveform in the information track adjacent to the pre-pit corresponds to only the basic signal, adverse effects from the sub-signal can be prevented when detecting the pre-pit when recording the recording information.
[0026]
  To solve the above problems, the claims7The invention described in claim6In the medium manufacturing apparatus described in (1), the sub-signal is phase-modulated based on predetermined information set in advance.
[0027]
Therefore, predetermined information other than the control information can be recorded in advance on the information recording medium.
[0028]
  To solve the above problems, the claims8The invention described in claim7The information recording medium is a disc-shaped information recording medium in which the information track and the adjacent track are formed in a spiral shape, and the recording information includes a plurality of information units, The forming means forms the pre-pit only on the adjacent track adjacent to the information track in which either the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded. The information track in which either the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded on the meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal. It is configured to be provided only in the upper region.
[0029]
Therefore, for example, as compared with the case where a meandering waveform corresponding to a pre-pit and a phase-modulated sub-signal is formed only on an adjacent track adjacent to an information track on which an even-numbered information unit is to be recorded, At the time of recording, it is possible to prevent the detection of the prepits and the detection of the meander waveform corresponding to the phase-modulated sub signal from adversely affecting each other.
[0030]
  To solve the above problems, the claims9The invention described in claim7 or 8In the medium manufacturing apparatus described in the above, the predetermined information is configured to be predetermined information used for controlling recording of the recording information by being reproduced when the recording information is recorded together with the control information. The
[0031]
Therefore, in addition to the control information, predetermined information that can be used for recording control can be further carried on the information recording medium.
[0032]
  To solve the above problems, the claims10The invention described in claim6 to 9In the medium manufacturing apparatus according to any one of the above, the information recording medium is a DVD-R / W, the fundamental frequency is 140 kilohertz, and the sub-frequency is 840 kilohertz. .
[0033]
Therefore, since the sub-frequency is six times the fundamental frequency, a sufficiently accurate and reliable recording reference signal can be obtained when recording information, and the sub-signal affects the modulation frequency band of the recording information. Can be prevented.
[0034]
  To solve the above problems, the claims11When recording the recording information on the information track, the invention described in claim 1, detecting means such as a pickup for detecting the wobbling signal and the prepit from the information recording medium according to claim 1, and the detected Extraction means such as a trap circuit for extracting the sub-signal from the wobbling signal; generation means such as a PLL unit for generating a recording reference signal for recording the recording information based on the extracted sub-signal; and the detection Reproducing means such as a prepit decoder for reproducing the control information based on the prepits made;WithThe meandering waveform in the information track at a position adjacent to the prepit in the information track is formed corresponding to the wobbling signal including only the basic signal.
[0035]
Therefore, an information track is formed having a meandering waveform corresponding to a wobbling signal in which a sub-signal having a frequency higher than that of the basic signal is multiplexed, and the wobbling signal is detected and further extracted. Since the signal is generated, the recording information can be recorded based on the recording reference signal having high accuracy and high reliability.
[0037]
Therefore, since the meandering waveform in the information track adjacent to the prepit corresponds to only the basic signal, it is possible to prevent an adverse effect from the sub signal when detecting the prepit.
[0038]
  To solve the above problems, the claims12The invention described in claim11The information detection device according to claim 1, further comprising: a second extraction unit configured to extract the predetermined information from the detected wobbling signal while the sub signal is phase-modulated based on predetermined predetermined information. .
[0039]
Therefore, predetermined information other than the control information can be acquired from the information recording medium.
[0040]
  To solve the above problems, the claims13The invention described in claim12In the information detection apparatus according to claim 1, the information recording medium is a disc-shaped information recording medium in which the information track and the adjacent track are formed in a spiral shape, and the recording information is configured by a plurality of information units. The pre-pit is formed only on the adjacent track adjacent to the information track on which either the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded, The meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal is on the information track in which either the odd numbered information unit or the even numbered information unit of the recording information is to be recorded. It is provided only in the area.
[0041]
Therefore, for example, as compared with the case of detecting a meander waveform corresponding to a pre-pit and a phase-modulated sub-signal formed only on an adjacent track adjacent to an information track in which an even-numbered information unit is to be recorded, It is possible to prevent the detection of the prepit and the detection of the meander waveform corresponding to the phase-modulated sub-signal from adversely affecting each other.
[0042]
  To solve the above problems, the claims14The invention described in claim12 or 13In the information detection apparatus according to claim 1, the predetermined information is predetermined information used for recording control of the recording information by being reproduced when the recording information is recorded together with the control information, and the extraction Second reproduction means such as a phase modulation decoder for reproducing the predetermined information is further provided.
[0043]
Therefore, in addition to the control information, predetermined information that can be used for recording control can be further acquired from the information recording medium.
[0044]
  To solve the above problems, the claims15The invention described in claim11 to 14The information detection apparatus according to any one of the above, wherein the information recording medium is a DVD-R / W, the fundamental frequency is 140 kilohertz, and the sub-frequency is 840 kilohertz. .
[0045]
Therefore, since the sub frequency is six times the fundamental frequency, a recording reference signal with sufficiently high accuracy and reliability can be obtained, and the sub signal can be prevented from affecting the modulation frequency band of the recording information.
[0046]
  To solve the above problems, the claims16The invention described in claim11 to 15The recording information based on the information detection device according to any one of the above, at least one of the reproduced control information or the reproduced predetermined information, and the generated recording reference signal Recording means such as a pickup for recording the information on the information track.
[0047]
Therefore, since the recording information is recorded based on the recording reference signal obtained by extracting the sub-signal having a high frequency, the recording information can be recorded more accurately and efficiently using predetermined information other than the control information. In addition, the recording information can be recorded more accurately.
[0048]
DETAILED DESCRIPTION OF THE INVENTION
Next, preferred embodiments of the present invention will be described with reference to the drawings.
[0049]
In the embodiment described below, address information indicating a position on the DVD-R / W as an information recording medium on which recording information is to be recorded is recorded with pre-pits as pre-information. A low-frequency signal serving as a reference for generating the recording clock signal used for controlling the entire recording operation of recording information on the DVD-R / W (including the rotational speed control of the DVD-R / W) The present invention is applied to a cutting apparatus as a medium manufacturing apparatus for manufacturing a pre-recorded DVD-R / W and an information recording apparatus for recording necessary recording information for the DVD-R / W. Embodiment.
(I)Embodiment of DVD-R / W
First, a pre-pit corresponding to the pre-information is formed in advance, and a groove track (to be described later) is wobbled at the following multiple frequencies to record the low-frequency signal and a high-frequency signal to be described later. An embodiment of / W will be described with reference to FIGS.
[0050]
1A is a perspective view showing the structure of the DVD-R / W according to the embodiment (for the sake of clarity, the description of wobbling corresponding to a high-frequency signal to be described later is omitted, and the low-frequency signal is used. 1 (b) is a sectional view of the groove track as viewed from the direction of the arrow in the perspective view, and FIG. 2 is recorded in advance on a DVD-R / W. FIG. 3 is a schematic diagram illustrating the recording format of the pre-information and the low frequency signal and the high frequency signal, and FIG. 3 is a schematic diagram for further explaining the recording format.
[0051]
First, the physical structure of the DVD-R / W of this embodiment will be described with reference to FIG.
[0052]
1 (a) and 1 (b), DVD-R / W1 is a phase change DVD-R / W having a recording layer 11 made of a phase change thin film and capable of writing information multiple times. A groove track 2 as an information track, which is a track to be recorded, and a land track 3 as an adjacent track for guiding a light beam B such as a laser beam as reproduction light or recording light to the groove track 2 are mutually connected. It is formed on the substrate 9 adjacent to each other.
[0053]
Further, in each groove track 2, as shown in FIG. 1 (b) in particular, protective layers 5 and 8 having a function of protecting the recording layer 11 so as to sandwich the recording layer 11, and recorded recording information are recorded. A reflective layer 6 for reflecting the light beam B during reproduction, a recording layer 11, protective layers 5 and 8, and a resin layer 9A and a protective film 7 for further protecting the reflective layer 6 from the outside air, etc., are respectively substrates. 9 are stacked on top of each other.
[0054]
On the other hand, a pre-pit 4 corresponding to the pre-information is formed on the land track 3. The pre-pit 4 is formed in advance before shipping the DVD-R / W1.
[0055]
Further, in the DVD-R / W1, the groove track 2 is the low frequency (specifically, 140 kilohertz) signal used for generating the recording clock signal (hereinafter, this signal is referred to as a fundamental frequency signal). Corresponds to a multi-frequency signal obtained by multiplexing the above-described high frequency (specifically, 840 kilohertz) signal (hereinafter referred to as a sub-frequency signal) used for recording address information described later. Wobbling. At this time, the recording of the fundamental frequency signal for generating the recording clock signal by the wobble corresponding to the fundamental frequency signal in the wobble (meandering waveform) in the groove track 2 and the wobble corresponding to the sub-frequency signal in the wobble will be described later. Such address information is recorded in advance before the DVD-R / W 1 is shipped, as in the pre-pit 4.
[0056]
When recording information (information such as pre-information and image information to be originally recorded other than the sync signal, the same applies hereinafter) is recorded on the DVD-R / W1, a groove track is recorded in an information recording apparatus described later. By detecting the fundamental frequency signal included in the multi-frequency signal in the wobble of 2 separately from the sub-frequency signal, the recording clock signal is acquired to control the entire recording operation of the DVD-R / W1.
[0057]
On the other hand, similarly, pre-information is obtained in advance by detecting the pre-pit 4 in the information recording apparatus, and the optimum output of the optical beam B as recording light is set based on the pre-information, and further recording information is recorded. Address information or the like which is a position on the DVD-R / W1 to be acquired is acquired, and recording information is recorded at a corresponding recording position based on this address information.
[0058]
The address information is also obtained by decoding the separately detected sub-frequency signal as will be described later.
[0059]
Here, at the time of recording the record information, the light beam B is irradiated so that the center thereof coincides with the center of the groove track 2 to form phase change pits corresponding to the record information on the groove track 2, thereby recording the record information. Form.
[0060]
At this time, the size of the light spot SP is set so that a part of the light spot SP is irradiated not only on the groove track 2 but also on the land track 3 as shown in FIG. Then, by using a part of the reflected light of the light spot SP irradiated on the land track 3, a push-pull method (radial using a photodetector divided by a dividing line parallel to the rotation direction of the DVD-R / W1) is used. The pre-information is acquired from the pre-pit 4 by the push-pull method), and the pre-information is acquired, and the multi-frequency signal is detected from the groove track 2 by using the reflected light of the light spot SP irradiated on the groove track 2. Then, generation of a recording clock signal or acquisition of address information is executed.
[0061]
Next, pre-information prerecorded on the DVD-R / W1 of the present embodiment and the recording format of the multi-frequency signal will be described with reference to FIG.
[0062]
In FIG. 2, the upper row shows the recording format in the recording information, and the lower waveform shows the wobbling state of the groove track 2 that records the recording information (that is, a plan view of the groove track 2), and shows the recording format. The upward arrow between the drawings showing the wobbling state of the groove track 2 schematically shows the position where the prepit 4 is formed.
[0063]
Here, in FIG. 2, the wobbling state of the groove track 2 is shown by using an amplitude larger than the actual amplitude for easy understanding, and the recorded information has phase change pits on the center line of the groove track 2. Formed and recorded.
[0064]
As shown in FIG. 2, in the present embodiment, the recording information recorded on the DVD-R / W1 is divided in advance for each sync frame as an information unit. Then, one recording sector is formed by 26 sync frames, and one ECC block, which will be described later, constituting the minimum unit of error correction at the time of reproduction is formed by 16 recording sectors.
[0065]
One sync frame has a length of 1488 times (1488T) a unit length (hereinafter referred to as T) corresponding to the bit interval defined by the recording format when recording the recording information. In addition, synchronization information SY for synchronization at the time of recording is recorded for each sync frame in the first 14T length portion of one sync frame.
[0066]
On the other hand, the pre-information recorded on the DVD-R / W1 in this embodiment is recorded for each sync frame. Here, in the recording of the pre-information by the pre-pit 4, the sync signal in the pre-information (hereinafter, the sync signal is referred to as the sync signal SY on the land track 3 adjacent to the area where the sync information SY in each sync frame in the record information is recorded. One pre-pit 4 is always formed to indicate the sync code), and the content of pre-information to be recorded on the land track 3 adjacent to the first half of the sync frame other than the sync information SY ( Two or one pre-pits 4 are formed to indicate (address information) (Note that the pre-pits 4 are not formed in the first half of the sync frame other than the synchronization information SY depending on the contents of the pre-information to be recorded. In the first sync frame of a recording sector, there are always three in the first half. Pre-pit 4 is formed continuously.).
[0067]
At this time, in the present embodiment, only one even-numbered sync frame (hereinafter referred to as an EVEN frame) or only an odd-numbered sync frame (hereinafter referred to as an ODD frame) in one recording sector. Pre-pits 4 are formed in the pre-information. That is, in FIG. 2, when the prepit 4 is formed in the EVEN frame (indicated by a solid line upward arrow in FIG. 2), the prepit 4 is not formed in the adjacent ODD frame.
[0068]
Here, as described above, the prepit 4 is formed only in the EVEN frame or the ODD frame, for example, when all the prepits 4 are formed over the sync frame of the entire DVD-R / W1, the DVD-R is formed. Due to the fact that / W1 is rotationally controlled at a constant linear velocity, there may occur a case where the prepit 4 is formed at the same position on the land track 3 on both sides of one groove track 2. In this case, the prepits 4 (which carry different pre-information) on different land tracks 3 are simultaneously included in the range of the light spot SP, and at this time, different pre-information is detected at the same time. Pre-information cannot be read accurately. Therefore, in the DVD-R / W1, normally, the prepit 4 is formed only in the region corresponding to the EVEN frame, and in this state, the prepit 4 is located at the same position on the land track 3 on both sides of the groove track 2. The pre-pits 4 are formed in the area corresponding to the ODD frame only when there is a possibility of the formation of.
[0069]
The data structure of the pre-information recorded by the pre-pit 4 (including the address information on the DVD-R / W1) is as described above because the pre-pit 4 is formed only every other sync frame as described above. A data structure is adopted in which address information on the DVD-R / W1 can be acquired by detecting all the pre-information corresponding to one ECC block and then decoding it.
[0070]
Next, regarding the relationship between the wobble of the groove track 2 and the position of the prepit 4, the prepit 4 is formed at the position of the maximum amplitude in the wobbling.
[0071]
At this time, the relationship between the content of the pre-information in the pre-pit 4 and the position to be formed will be described more specifically. The pre-pit 4 formed on the land track 3 adjacent to the area where the synchronization information SY is recorded is “ Assuming that the prepit 4 formed on the land track 3 adjacent to the first half portion in the sync frame other than the synchronization information SY is “prepit B1” and “prepit B0” from the head, the following table 1 is used. As shown in FIG. 5, prepits B2 to B0 are all formed at locations corresponding to the sync code in the first EVEN frame of one recording sector, and only prepits B2 and B1 are formed at locations corresponding to the sync code in the ODD frame. The data “1” as pre-information other than the sync code is formed. Only the pre-pits B2 and B0 in a location corresponding are formed, in a location corresponding to the data "0" as the pre-information other than the sync code are only pre-pit B2 is formed.
[0072]
[Table 1]

On the other hand, the groove track 2 has 840 kHz (that is, one wave at the fundamental frequency) to the fundamental frequency signal having the fundamental frequency of 140 kHz (a frequency corresponding to the eight waves of one sync frame) over all the sync frames. The sub-frequency signal having the above-mentioned sub-frequency) is wobbled at a multiplexed frequency.
[0073]
Further, the sub-frequency signal is a fundamental frequency signal at a position adjacent to the pre-pit 4 (including both the case where the pre-pit 4 is formed in the EVEN frame and the case where the pre-pit 4 is formed in the ODD frame). Are not multiplexed and are phase-modulated based on address information recorded using the sub-frequency signal, as will be described later.
[0074]
In the information recording apparatus described later, the recording clock signal for controlling the entire recording operation of the DVD-R / W1 is generated by detecting the basic frequency, and the sub-frequency signal is detected. The address information is acquired.
[0075]
Next, the wobble mode of the groove track will be described in more detail with reference to FIG.
[0076]
The upper part of FIG. 3 is a diagram showing the formation position of the prepit 4 and the actually multiplexed sub-frequency signal and the fundamental frequency signal separately from the top, and the lower part of FIG. 3 is the phase modulation in the sub-frequency signal. 5 is a waveform correspondence diagram showing the relationship (in the embodiment, there are three ways) between the above-described mode and address information recorded by the phase modulation.
[0077]
Further, in the upper part of FIG. 3, each square in the diagram showing the sub-frequency signal and the fundamental frequency signal indicates one wave (one cycle) in each signal.
[0078]
As shown in the upper part of FIG. 3, the prepit 4 is normally formed only in the EVEN frame.
[0079]
The sub-frequency signal is not multiplexed with the fundamental frequency signal at the position where the pre-pit 4 is actually formed and the position where the pre-pit 4 may be formed in both the EVEN frame and the ODD frame. Further, six waves of the sub-frequency signal correspond to one wave in the fundamental frequency signal.
[0080]
Further, for the fundamental frequency signal, the eight waves correspond to one sync frame.
[0081]
Next, the address information recorded by phase modulation of the sub-frequency signal will be described with reference to the lower part of FIG. 3. First, when the sync code in the address information is recorded, as shown in the lower part of FIG. Of the six sub-frequency signals corresponding to one signal wave, the phase of only the first three waves is inverted and the groove track 2 is wobbled.
[0082]
In addition, when data “1” in the address information is recorded, as shown in the lower right of FIG. 3, the phases of only the first wave, the fourth wave, and the fifth wave among the six sub-frequency signals are displayed. The groove track 2 is reversed and wobbled.
[0083]
Further, when data “0” in the address information is recorded, as shown in the lower part of FIG. 3, the phase of only the first wave and the sixth wave among the six sub-frequency signals is inverted and the groove is inverted. Track 2 is wobbled.
[0084]
Here, among the sub-frequency signals, the phase modulation for recording the address information is performed at a position corresponding to the first three waves in the basic frequency signal in one sync frame (that is, the possibility that the prepit 4 is formed). It is set to one of the positions corresponding to the fourth wave to the eighth wave (excluding the position where there is).
[0085]
At this time, when address information is recorded by phase-modulating the sub-frequency signal as shown in the lower part of FIG. 3, address information of up to 13 bits can be recorded in one recording sector. Unlike the case, for example, a data structure is adopted in which address information (so-called absolute address information) on the DVD-R / W1 can be acquired only by detecting address information corresponding to four recording sectors and then decoding the address information. be able to.
[0086]
As described above, in one recording sector, the sub-frequency signal is phase-modulated corresponding to the prepit 4 being formed only in either the EVEN frame or only the ODD frame. For the portion, if there is a possibility that the portion is close to the position of the prepit 4 corresponding to the groove track 2 on the inner side in the radial direction of the DVD-R / W1, the other non-adjacent sync frame ( This portion is formed in either the EVEN frame or the ODD frame. That is, in one recording sector, a portion where the sub-frequency signal is phase-modulated is formed in only one of the EVEN frame and only the ODD frame.
[0087]
Therefore, in FIG. 3, when a wobble including a sub-frequency signal subjected to phase modulation is formed in an EVEN frame, the wobble is not formed in an ODD frame adjacent thereto.
[0088]
Furthermore, the sync frame corresponding to the position where the pre-pit 4 is formed does not always coincide with the sync frame in which the sub-frequency signal is phase-modulated.
[0089]
With the configuration described above, it is possible to eliminate adverse effects from the pre-pits 4 when detecting recorded address information by phase modulating the sub-frequency signal.
[0090]
Regarding the relationship between the address information in the pre-information recorded on the DVD-R / W1 by the pre-pit 4 and the address information recorded on the DVD-R / W1 by the phase modulation of the sub-frequency signal. For example, the same address information may be superimposed and carried in the phase modulation of the prepit 4 and the sub-frequency signal in order to improve the reliability at the time of reproduction of the address information. It may be carried separately.
[0091]
(II)Embodiment of cutting device
Next, the cutting apparatus according to this embodiment for forming the prepit 4 and the groove track 2 shown in FIGS. 2 and 3 into the shape shown in FIG. 1 in the form shown in FIGS. 2 and 3 will be described with reference to FIGS. 5 will be described.
[0092]
FIG. 4 is a block diagram showing the overall configuration of the cutting apparatus according to the embodiment, and FIG. 5 is a block diagram showing the configuration of the preformat encoder.
[0093]
4 and 5 is a stamper disk for mass production of DVD-R / W1 on which pre-pits 4 and groove tracks 2 for wobbling are formed and pre-information and address information are recorded according to the present invention. It is for making.
[0094]
First, the overall configuration and operation of the cutting apparatus will be described with reference to FIG.
[0095]
As shown in FIG. 3, the cutting apparatus C according to the embodiment includes a data generation unit 20, a parallel / serial converter 21, a preformat encoder 22 as a generation unit, a clock signal generation unit 23, and a formation unit. A laser generator 24, an optical modulator 25 as a forming means, an objective lens 26, a spindle motor 29, a rotation detector 30, a rotation servo circuit 31, a feed unit 32, a position detector 33, The feed servo circuit 34, the electromagnet 35, and the permanent magnet 36 are configured.
[0096]
The laser generator 24 also includes a light beam L_GDevice 24 for emitting light_GAnd light beam L_LDevice 24 for emitting light_LIt consists of.
[0097]
Further, the stamper disk includes a glass substrate 27 as a stamper disk main body, a prepit 4 coated on the glass substrate, and a resist (photosensitive material) 28 for forming each track.
[0098]
Next, the operation will be described.
[0099]
First, the data generation unit 20 pre-information S including address information to be recorded on the DVD-R / W1._PPAnd output to the parallel / serial converter 21.
[0100]
The parallel / serial converter 21 then generates the generated pre-information S._PPAre subjected to parallel / serial conversion and output to the preformat encoder 22.
[0101]
As a result, the preformat encoder 22 makes the serialized pre-information S_PPBased on the recording pre-information S for forming the prepit 4 and the groove track 2 in the recording format shown in FIGS._RIs generated and output to the optical modulator 25, and a wobbling signal S to be described later is generated._WAnd output to the electromagnet 35.
[0102]
At this time, the clock signal generator 23 generates a clock signal CLK (period is T) used for pre-formatting and outputs it to the pre-format encoder 22.
[0103]
On the other hand, the laser generator 24 forms a light beam L for forming the groove track 2 shown in FIG. 1 while wobbling the DVD-R / W1 substrate._GAnd a light beam L for forming the land track 3 and the prepit 4 shown in FIG._LInject.
[0104]
The optical modulator 25 then outputs the emitted light beam L._LOr L_GRecord pre-information S_RBased on the intensity, the intensity is modulated and ejected.
[0105]
The light beam L emitted from the light modulator 25_GAnd L_LIs condensed on the stamper disk by the objective lens 26.
[0106]
Next, in parallel with these, the spindle motor 29 rotates the stamper disk.
[0107]
Then, the rotation detector 30 detects the number of rotations of the stamper disk, and based on the detected number of rotations, the rotation servo circuit 31 servo-controls the rotation of the stamper disk and once per rotation of the stamper disk. Only one rotation detection signal S_SAnd output to the preformat encoder 22.
[0108]
Further, in order to form the spiral groove track 2 and the land track 3 on the stamper disk, the feed unit 32 moves the spindle motor 29 and the stamper disk in the radial direction of the stamper disk corresponding to the rotation of the stamper disk. Move.
[0109]
At this time, the position of the feed unit 32 in the radial direction is detected by the position detector 33, and the movement of the feed unit 32 is servo-controlled by the feed servo circuit 34 based on the detected position of the feed unit 32.
[0110]
On the other hand, the electromagnet 35 receives the wobbling signal S._WBased on the light beam L_GIs oscillated in the radial direction of the stamper disk to form the groove track 2 wobbling at the above-described multiple frequencies.
[0111]
At this time, the permanent magnet 36 fixed to the light modulator 25 actually vibrates the light modulator 25 in the radial direction of the stamper disk by the magnetic interaction with the electromagnet 35, thereby causing the light beam L._GThe groove track 2 wobbling in the above-described manner is formed by vibrating the irradiation position.
[0112]
Here, the light beam L_LIs recorded pre-information S by the optical modulator 25._RIs modulated based on the light beam L_GIs irradiated to the stamper disk while maintaining a constant strength and vibrating in the radial direction of the stamper disk by a DC (direct current) driving device (not shown).
[0113]
Furthermore, the light beam L forming the land track 3_LAnd the light beam L forming the groove track 2_GAre irradiated while shifting the irradiation position in the radial direction of the stamper disk, and the concentric spiral land track 3 and groove track 2 are formed simultaneously.
[0114]
Next, the detailed configuration and operation of the preformat encoder 22 will be described with reference to FIG.
[0115]
As shown in FIG. 5, the preformat encoder 22 includes a frame signal generator 40, an ODD / EVEN determination gate signal generator 41, a determiner 42, a switch 43, a recording pre-information generator 44, It comprises a counter 45, a ROM (Read Only Memory) 46 as a generating means, and a D / A converter 47.
[0116]
Next, the operation will be described.
[0117]
First, in the configuration shown in FIG._RESwitched to the side.
[0118]
Then, the frame signal generator 40 to which the clock signal CLK is input, at the timing corresponding to each sync frame shown in FIGS. 2 and 3 based on the clock signal CLK, the EVEN frame signal corresponding to the EVEN frame. S_EAnd an ODD frame signal S corresponding to the ODD frame._OAnd an EVEN frame signal S corresponding to one EVEN frame._EAn EVEN frame count signal S output from an EVEN frame counter (not shown) that is reset each time_ECAnd the first frame signal S indicating the beginning of each recording sector._HIs output.
[0119]
Then, the ODD / EVEN determination gate signal generator 41 includes a clock signal CLK, a single rotation detection signal S._SAnd EVEN frame count signal S_ECThe gate signal S for determining whether the sync frame in which the pre-pit 4 to be recorded in the period corresponding to one round in the stamper disk is to be formed is the EVEN frame or the ODD frame._GIs output.
[0120]
By these, the decision unit 42 makes the EVEN frame signal S_E, Gate signal S_GAnd one rotation detection signal S_SBased on the determination signal S for determining whether the sync frame in which the pre-pit 4 is to be formed is an EVEN frame or an ODD frame_JIs output.
[0121]
Further, the recording pre-information generator 44 receives the leading frame signal S._H, EVEN frame signal S_E, ODD frame signal S_O, Clock signal CLK and pre-information S_PPThe even-numbered record pre-information S for forming the pre-pit 4 corresponding to the EVEN frame in the record information_REAnd odd recording pre-information S for forming pre-pits 4 corresponding to ODD frames in the recording information_ROIs output.
[0122]
Then, the switch 43 receives the determination signal S_JBased on the even recording pre-information S_REOr odd recording pre-information S_ROIs selectively switched and output.
[0123]
On the other hand, the counter 45 counts the EVEN frame signal S._EIs used as an initialization signal, and the number of clocks included in the clock signal CLK is counted while being initialized._CIs output.
[0124]
Then, the ROM 46 stores the count signal S._CAnd pre-information S_PPThe wobbling signal S stored in advance for wobbling the groove track 2 with the wobbles having the multiple frequencies shown in FIGS._W (Digital signal) is output.
[0125]
Thereby, the D / A converter 47 outputs the output wobbling signal S._WIs a wobbling signal S which is an analog signal for vibrating the optical modulator 25._WTo be output to the electromagnet 35.
[0126]
Here, for details of the configuration and operation of the frame signal generator 40, the ODD / EVEN determination gate signal generator 41, the determination unit 42, and the recording pre-information generator 44 in the preformat encoder 22, for example, The contents described in paragraph numbers [0067] to [0090] in the specification of Japanese Patent Application No. 8-310941 filed earlier by the applicant of the present application can be applied as they are.
[0127]
Next, the wobbling signal S_WThe operations of the counter 45, the ROM 46, and the D / A converter 47 according to the present invention for generating the above will be described in detail with reference to FIGS.
[0128]
First, the counter 45 receives the input EVEN frame signal S._EAs an initialization signal, the EVEN frame signal S_EEach time is input, the number of clocks of the clock signal CLK is counted while being initialized, and the counted value is counted as the count signal S._COutput as.
[0129]
And the count signal S_CAnd pre-information S_PPIs input as address data to the ROM 46, whereby the ROM 46 receives the count signal S._CAnd pre-information S_PPThe output value set in advance corresponding to the content of the table and stored in the ROM 46 as a table is stored in the wobbling signal S._WOutput as.
[0130]
Here, in this embodiment, the wobbling frequency of the groove track 2 is set to the wobbling signal S to be the wobble as shown in the lower part of FIG. 3 according to the type of address information recorded by the sub-frequency signal._WIs stored in the ROM 46, and the count signal S is output from the ROM 46._CAnd pre-information S_PPBased on the wobbling signal S_WOutput as.
[0131]
As a specific storage form in the ROM 46, for example, the pre-information S_PPIs the MSB (Most Significant Bit) in the address information to be recorded, and the count signal S_CIs used as a digit other than the MSB (2SB, 3SB... LSB) in the address information, and data corresponding to the wobble shown in the lower part of FIG. Information S_PPAnd counter signal S_COne of these based on the wobbling signal S_WCan be read as
[0132]
More specifically, for example, when the address information to be recorded is “0”, and the sub-frequency signal indicating it is multiplexed with the fourth fundamental frequency signal shown in the upper part of FIG. Is the timing at which the fourth fundamental frequency signal starts, “558 ((1488/8) × 3)”, the corresponding count signal S_CAnd the count signal S_CFrom the timing at which the wobble signal S is output, the data corresponding to the wobble shown in the lower part of FIG._WRead out and output.
[0133]
On the other hand, when the address information to be recorded is “1” and the sub-frequency signal indicating the same is multiplexed on the fourth fundamental frequency signal shown in the upper part of FIG. 3, the count value of the counter 45 is “558”. The corresponding count signal S_CAnd the count signal S_CFrom the timing at which the wobble signal S is output, the data corresponding to the wobble shown in the lower right of FIG._WRead out and output.
[0134]
Similarly, when the address information to be recorded is a sync code, and the sub-frequency signal indicating it is multiplexed with the fourth fundamental frequency signal shown in the upper part of FIG. 3, the count value of the counter 45 is “558”. The corresponding count signal S_CAnd the count signal S_CFrom the timing at which the wobble signal S is output, the data corresponding to the wobble shown in the lower left of FIG._WRead out and output.
[0135]
Thereafter, the wobbling signal S_WIs converted into an analog signal by the D / A converter 47, and the wobbling signal S converted into the analog signal is converted into an analog signal._WBy the operation of the electromagnet 35 and the permanent magnet 36 based on the above, the optical modulator 25 is moved (vibrated) in the radial direction of the stamper disk, so that the groove track 2 wobbling at a desired multiple frequency is formed.
[0136]
By the operation of the preformat encoder 22 described above, the wobbling signal S for forming the groove track 2 on the stamper disk with the wobble shown in FIGS. 2 and 3 in which the address information is carried by the sub-frequency signal._WIs generated.
[0137]
(III)Embodiment of information recording apparatus
Next, an embodiment of an information recording apparatus according to the present invention for recording record information on a DVD-R / W 1 having the above-described configuration will be described with reference to FIGS.
[0138]
First, the configuration of the information recording apparatus according to the embodiment will be described with reference to FIGS. 6 and 7.
[0139]
FIG. 6 is a block diagram showing an overall configuration of the information recording apparatus according to the embodiment, and FIG. 7 is a block diagram showing a detailed configuration of the information recording apparatus.
[0140]
As shown in FIG. 6, the information recording apparatus S according to the embodiment includes a pickup 50 as a detection unit and a recording unit, a driver 51, a strategy circuit 52, a DVD encoder 53, a bandpass filter 54, and an extraction unit. Trap circuit 55, pre-pit detection unit 56, phase comparison unit 57, phase shifter 58, pre-pit decoder 59 as reproduction means, phase modulation decoder 60 as second reproduction means, and PLL as generation means (Phase Locked Loop) section 61, spindle control section 62, CPU 63, spindle motor 64, first wobble PLL section WP1, and second wobble PLL section WP2 are configured.
[0141]
Further, the first wobble PLL unit WP1 and the second wobble PLL unit WP2 basically have the same configuration, and specifically, as shown in FIG. And 80, a phase comparator 67, an equalizer 68, and a VCO (Voltage Controlled Oscillator) 69.
[0142]
Further, the spindle control unit SP includes a reference signal generation unit 70, frequency dividers 71 and 72, a phase comparison unit 73, an equalizer 74, and a spindle servo unit 75.
[0143]
Next, the operation of the information recording apparatus S will be described with reference to FIGS.
[0144]
Recording data Sr as recording information to be recorded on the DVD-R / W1 is input from the outside, and is modulated by the DVD encoder 15 on the basis of a recording clock signal Swc (to be described later) and a control signal Sct (to be described later). It is output to the strategy circuit 16 as Sec.
[0145]
Then, the strategy circuit 16 converts the waveform in order to adjust the shape of the recording pit formed on the DVD-R / W 1 based on the recording clock signal Swc, and outputs it to the driver 51 as the recording signal Stt.
[0146]
Then, the driver 51 amplifies the recording signal Stt to generate an amplified recording signal Sdp and outputs it to the pickup 50.
[0147]
After that, the pickup 50 irradiates the groove track 2 on the DVD-R / W 1 where the recording pit corresponding to the recording data Sr is to be formed with the light beam B modulated by the amplified recording signal Sdp to perform the recording.
[0148]
On the other hand, prior to the formation of the recording pit corresponding to the recording data Sr, the pickup 50 irradiates the DVD-R / W1 with the light beam B (see FIG. 1) and is modulated by the wobbles of the prepit 4 and the groove track 2. The reflected light of the light beam B is received, a detection signal Sp including information on the wobbling of the prepit 4 and the groove track 2 is generated, and is output to the prepit detection unit 56, the bandpass filter 54 and the trap circuit 55.
[0149]
At this time, the detection signal Sp has a multiple frequency (140 kilohertz + 840 kilohertz) corresponding to the wobbling of the groove track 2 and an impulse waveform (see reference numeral 4 in FIG. 3) at the timing when the prepit 4 is formed. ) Is generated.
[0150]
Next, the band-pass filter 54 having a characteristic of allowing only a 140 kilohertz signal to pass through extracts the wobble detection signal Swp1 corresponding to the fundamental frequency (140 kilohertz) in the groove track 2 from the detection signal Sp, and the first wobble PLL unit It outputs to the frequency divider 30 in WP1.
[0151]
Then, based on the wobble detection signal Swp1, the first wobble PLL unit WP1 synchronizes with the fundamental frequency signal in the wobble of the groove track 2 and has a clock signal Scl having a frequency corresponding to the reciprocal of the T, and the fundamental frequency signal. And a clock signal Swcl having the same frequency as that of the basic frequency signal. The clock signal Scl is output to the prepit detection unit 56, the phase shifter 58 and the prepit decoder 59, and the clock signal Swcl is output to the prepit detection unit 56, the phase comparison unit 57, the phase shifter 58, the prepit decoder 59 and the spindle control unit. Each is output to the frequency divider 71 in the SP.
[0152]
Therefore, in the first wobble PLL unit WP1, as shown in FIG. 7A, the clock signal Swcl obtained by dividing the clock signal Scl by the dividing period 80 is further divided by the frequency divider 66. The phase comparison unit 67 performs phase comparison between the frequency-divided signal and the signal obtained by frequency-dividing the wobble detection signal Swp1 by the frequency divider 65, and the VCO 69 is driven using the signal obtained by frequency-correcting the comparison result by the equalizer 68. A clock signal Scl is generated.
[0153]
On the other hand, the trap circuit 55 having the characteristic of cutting off a signal of 140 kHz corresponds to a signal (the sub-frequency signal (840 kHz)) obtained by removing the fundamental frequency signal (140 kHz) in the groove track 2 from the detection signal Sp. A wobble detection signal Swp2 carrying address information is generated by the phase modulation, and is output to the second wobble PLL unit WP2 and the phase modulation decoder 60.
[0154]
As a result, the second wobble PLL unit WP2 generates a clock signal Sap having the same frequency as that of the sub-frequency signal in the wobble of the groove track 2 based on the wobble detection signal Swp2. Output to 60.
[0155]
Therefore, the second wobble PLL unit WP2 generates the clock signal Sap with substantially the same configuration and operation as the first wobble PLL unit WP1.
[0156]
On the other hand, the spindle controller SP to which the clock signal Swcl is input generates a drive control signal Sdc for controlling the rotation speed of the spindle motor 19 based on the clock signal Swcl and outputs it to the spindle motor 64.
[0157]
For this reason, in the spindle control unit SP, the reference signal for driving the spindle motor 64 output from the reference signal generation unit 70 is frequency-divided by the frequency divider 72, and the frequency division result and the clock signal Swcl are frequency-divided. The signal divided by 71 is phase-compared by the phase comparison unit 73, and the signal obtained by correcting the frequency characteristic of the comparison result by the equalizer 74 is input to the spindle servo unit 75. Based on this, the spindle servo unit 75 Generates the drive control signal Sdc for driving the spindle motor 19 so that the DVD-R / W1 rotates at a constant linear velocity, and outputs it to the spindle motor 64.
[0158]
Next, the pre-pit detection unit 56 uses the clock signal Scl as an auxiliary based on the timing indicated by the clock signal Swcl, and pre-pit signal Spp corresponding to the pre-pit 4 included in the detection signal Sp (see the upper part of FIG. 3). ) Are extracted by the radial push-pull method and output to the phase comparator 57 and the pre-pit decoder 59.
[0159]
Next, the phase comparison unit 57 to which the pre-pit signal Spp and the clock signal Swcl are input compares the phases of the respective signals, generates a comparison signal Scp, and outputs it to the phase shifter 58.
[0160]
The phase shifter 58 shifts the phase of the clock signal Swcl corresponding to the comparison signal Scp while using the clock signal Scl as an auxiliary, and generates the phase shift signal Sps and outputs it to the PLL unit 61.
[0161]
As a result, the PLL unit 61 generates the recording clock signal Swc having the period T similarly to the clock signal Scl based on the phase shift signal Sps, and outputs the recording clock signal Swc to the DVD encoder 53 and the strategy circuit 52 as well as information recording. Output to necessary members in the device S.
[0162]
On the other hand, the prepit decoder 59 to which the clock signals Scl and Swcl and the prepit signal Spp are input decodes the prepit signal Spp based on the timing indicated by the clock signal Swcl while using the clock signal Scl as an auxiliary. The pre-information including the address information carried as the pre-pit 4 is acquired and output to the CPU 63 as the decoded pre-pit signal Spad.
[0163]
Further, the phase modulation decoder 60 including a synchronous detector, for example, decodes the address information from the information of the phase modulation portion (see the lower part of FIG. 3) included in the wobble detection signal Swp2 while using the clock signal Sap as a reference clock signal. The decoded address signal Shad is output to the CPU 63.
[0164]
Then, the CPU 63 recognizes the recording position on the DVD-R / W1 where the recording data Sr is to be recorded, based on the address information included in the decoded pre-pit signal Spad and the address information indicated by the decoded address signal Shad. Then, the control signal Sct for controlling the DVD encoder 53 is generated so as to record the necessary recording data Sr at the recording position, and is output to the DVD encoder 53.
[0165]
In addition to this, the CPU 63 uses the information for setting the irradiation intensity of the light beam B in the pickup 50 other than the address information included in the decoded pre-pit signal Spad, for example, to generate the light beam B having the irradiation intensity. The entire recording operation is controlled such as controlling the pickup 50 to emit.
[0166]
As described above, according to the operations of the DVD-R / W 1, the cutting device C, and the information recording device S of the embodiment, the wobble in the groove track 2 adjacent to the prepit 4 corresponds only to the fundamental frequency signal. Therefore, it is possible to prevent an adverse effect from the sub-frequency signal when detecting the prepit 4.
[0167]
Further, since the sub-frequency signal is phase-modulated based on the address information, address information other than the pre-information is recorded in advance on the DVD-R / W1 by wobbling, and the address is recorded when recording data Sr is recorded. Information can be detected stably.
[0168]
Further, a groove track 2 and a land track 3 are spirally formed on the DVD-R / W1, and the groove track in which either the odd-numbered sync frame or the even-numbered sync frame is recorded in the prepit 4 is recorded. 2 is formed only on the land track 3 adjacent to each other, and a wobble corresponding to a multi-frequency signal including a phase-modulated sub-frequency signal is a groove in which either an ODD frame or an EVEN frame is to be recorded. Since it is provided only in the area on the track 2, when recording the recording data Sr, the detection of the prepit 4 and the detection of the wobble corresponding to the phase-modulated sub-frequency signal have an adverse effect on each other. Can be prevented.
[0169]
In the example of the information recording apparatus S shown in FIG. 6, the fundamental frequency signal is extracted from the wobble of the groove track 2 and the recording clock signal Swc is generated therefrom. In addition to this, the trap circuit 55 and the second wobble PLL are also generated. The recording clock signal may be generated by the phase comparison unit 57, the phase shifter 58, and the PLL unit 61 using the sub-frequency signal extracted by the unit WP2.
[0170]
In this case, since the basic frequency is 140 kilohertz and the sub frequency is 840 kilo hertz, the sub frequency is six times the basic frequency, and the recording clock signal Swc having sufficiently high accuracy and reliability is recorded. It can be obtained at the time of recording the data Sr, and the sub-frequency signal can be prevented from affecting the modulation frequency band of the recording data Sr.
[0171]
At this time, the frequency of the sub-frequency signal may be a frequency that is an integer multiple of two or more with respect to the frequency of the fundamental frequency signal, in addition to 840 kilohertz in the above-described embodiment. It suffices if the frequency is higher than the signal.
[0172]
In this case, since a recording clock signal is generated by extracting a sub-frequency signal having a frequency higher than the basic frequency, a recording having a frequency higher than that of the recording clock signal Swc generated based on the basic frequency signal. A clock signal is obtained, and recording data Sr can be recorded based on a recording clock signal having high accuracy and high reliability.
[0173]
Further, in each of the above-described embodiments, the case where the present invention is applied to a DVD-R / W1 that can be recorded a plurality of times has been described. It is also possible to apply the present invention to this.
[0174]
【The invention's effect】
As described above, according to the first aspect of the present invention, the information track is formed with the meandering waveform corresponding to the wobbling signal in which the sub-signal having a higher frequency than the basic signal is multiplexed. The recording reference signal can be generated by detecting the wobbling signal and extracting the sub signal when recording information is recorded.
[0175]
Therefore, recording information can be recorded based on a recording reference signal having high accuracy and high reliability.
[0176]
According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, since the meandering waveform in the information track adjacent to the prepit corresponds only to the basic signal, the recording information is recorded. In this case, it is possible to prevent an adverse effect from the sub-signal when detecting the pre-pit.
[0177]
According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, since the sub-signal is phase-modulated based on the predetermined information, the predetermined information other than the control information is Can also be recorded in advance on an information recording medium.
[0178]
According to the invention described in claim 4, in addition to the effect of the invention described in claim 3, the information recording medium is a disk-shaped information recording medium in which information tracks and adjacent tracks are formed in a spiral shape, and the prepits are Either an odd-numbered information unit or an even-numbered information unit is formed only on an adjacent track adjacent to an information track to be recorded, and further corresponds to a wobbling signal including a phase-modulated sub-signal. Since the meandering waveform is provided only in the area on the information track in which either the odd-numbered information unit or the even-numbered information unit of the recorded information is to be recorded, And detection of the meander waveform corresponding to the phase-modulated sub-signal can be prevented from adversely affecting each other.
[0179]
According to the invention described in claim 5, in addition to the effect of the invention described in claim 3 or 4, recording of the record information is performed by reproducing the predetermined information together with the control information when the record information is recorded. Therefore, in addition to the control information, predetermined information that can be used for recording control can be further carried on the information recording medium.
[0180]
According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, the information recording medium is a DVD-R / W, and the fundamental frequency is 140 kHz. In addition, since the sub frequency is 840 kilohertz, the sub frequency is 6 times the basic frequency, and a recording reference signal with sufficiently high accuracy and reliability can be obtained at the time of recording the recording information, and the sub signal is recorded. It is possible to prevent the modulation frequency band of information from being affected.
[0181]
According to the seventh aspect of the present invention, it is possible to form an information track having a meandering waveform corresponding to a wobbling signal in which a sub-signal having a frequency higher than that of the basic signal is multiplexed. The recording reference signal can be generated by detecting the wobbling signal and extracting the sub-signal during recording.
[0182]
Therefore, recording information can be recorded based on a recording reference signal having high accuracy and high reliability.
[0183]
According to the invention described in claim 8, in addition to the effect of the invention described in claim 7, since the meandering waveform in the information track adjacent to the prepit corresponds to only the basic signal, In some cases, it is possible to prevent adverse effects from sub-signals when detecting prepits.
[0184]
According to the invention described in claim 9, in addition to the effect of the invention described in claim 7 or 8, since the sub-signal is phase-modulated based on the predetermined information, the predetermined information other than the control information is Can also be recorded in advance on an information recording medium.
[0185]
According to the invention described in claim 10, in addition to the effect of the invention described in claim 9, the information recording medium is a disc-shaped information recording medium in which information tracks and adjacent tracks are formed in a spiral shape. Is formed of a plurality of information units, and further, either odd-numbered information units or even-numbered information units form prepits only on adjacent tracks adjacent to the information track to be recorded, and the phase Since the meandering waveform corresponding to the wobbling signal including the modulated sub-signal is provided only in the area on the information track in which either the odd-numbered information unit or the even-numbered information unit of the recorded information is to be recorded. When recording information is recorded, it is possible to prevent the detection of the prepits and the detection of the meandering waveform corresponding to the phase-modulated sub-signal from adversely affecting each other. .
[0186]
According to the invention described in claim 11, in addition to the effect of the invention described in claim 9 or 10, recording of the record information is performed by reproducing the predetermined information together with the control information when the record information is recorded. Therefore, in addition to the control information, predetermined information that can be used for recording control can be further carried on the information recording medium.
[0187]
According to the invention described in claim 12, in addition to the effects of the invention described in any one of claims 7-11, the information recording medium is a DVD-R / W and the fundamental frequency is 140 kHz. In addition, since the sub frequency is 840 kilohertz, the sub frequency is 6 times the basic frequency, and a recording reference signal with sufficiently high accuracy and reliability can be obtained at the time of recording the recording information, and the sub signal is recorded. It is possible to prevent the modulation frequency band of information from being affected.
[0188]
According to the thirteenth aspect of the present invention, an information track is formed having a meandering waveform corresponding to a wobbling signal in which a sub-signal having a frequency higher than that of the basic signal is multiplexed, and the wobbling signal is detected and further detected. Since the recording reference signal is generated by extracting the sub-signal, recording information can be recorded based on the recording reference signal having high accuracy and high reliability.
[0189]
According to the fourteenth aspect of the invention, in addition to the effect of the thirteenth aspect, the meandering waveform in the information track adjacent to the prepit corresponds only to the basic signal. In addition, adverse effects from sub-signals can be prevented.
[0190]
According to the invention described in claim 15, in addition to the effect of the invention described in claim 13 or 14, the sub-signal is phase-modulated based on predetermined information, and a predetermined wobbling signal is detected from the detected wobbling signal. Since the information is extracted, predetermined information other than the control information can be acquired from the information recording medium.
[0191]
According to the invention described in claim 16, in addition to the effect of the invention described in claim 15, the information recording medium is a disc-shaped information recording medium in which information tracks and adjacent tracks are formed in a spiral shape. Is composed of a plurality of information units, and the pre-pit is formed only on the adjacent track adjacent to the information track on which either the odd-numbered information unit or the even-numbered information unit is to be recorded, Furthermore, the meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal is only in the area on the information track where either the odd-numbered information unit or the even-numbered information unit of the recorded information is to be recorded. Since it is provided, it is possible to prevent the detection of the prepits and the detection of the meander waveform corresponding to the phase-modulated sub signal from adversely affecting each other.
[0192]
According to the invention described in claim 17, in addition to the effect of the invention described in claim 15 or 16, recording of the record information is performed by reproducing the predetermined information together with the control information when the record information is recorded. Since this information is reproduced as well as the predetermined information used for the control, it is possible to further acquire from the information recording medium predetermined information that can be used for controlling the recording in addition to the control information.
[0193]
According to the invention described in claim 18, in addition to the effect of the invention described in any one of claims 13 to 17, the information recording medium is a DVD-R / W, and the fundamental frequency is 140 kHz. In addition, since the sub frequency is 840 kilohertz, the sub frequency is six times the basic frequency, and a recording reference signal with sufficiently high accuracy and reliability can be obtained. Can be prevented.
[0194]
According to the nineteenth aspect of the invention, since the record information is recorded based on the record reference signal obtained by extracting the sub-signal having a high frequency, the record information can be recorded more accurately, and other than the control information The recorded information can be recorded efficiently and more accurately using the predetermined information.
[Brief description of the drawings]
FIG. 1 is a diagram showing a structure of a DVD-R / W of an embodiment, (a) is a perspective view showing a structure of a DVD-R / W of an embodiment, and (b) is an arrow in the perspective view. It is sectional drawing which looked at the groove track from the direction.
FIG. 2 is a schematic diagram showing a recording format of pre-information and the like recorded on a DVD-R / W.
FIG. 3 is a schematic diagram illustrating a recording format recorded on a DVD-R / W.
FIG. 4 is a block diagram illustrating an overall configuration of the cutting apparatus according to the embodiment.
FIG. 5 is a block diagram showing a configuration of a preformat encoder.
FIG. 6 is a block diagram showing an overall configuration of the information recording apparatus according to the embodiment.
7 is a block diagram showing a detailed configuration of the information recording apparatus according to the embodiment, (a) is a block diagram showing a configuration of a wobble PLL unit, and (b) is a block diagram showing a configuration of a spindle control unit. FIG. It is.
[Explanation of symbols]
1 ... DVD-R / W
2 ... Groove track
3 ... Land track
4 ... Prepit
5, 8 ... Protective layer
6 ... Reflective layer
7 ... Protective film
9 ... Board
9A ... Resin layer
11 ... Recording layer
20: Data generation unit
21 ... Parallel / serial converter
22 ... Preformat encoder
23: Clock signal generator
24, 24_G, 24_L... Laser generator
25. Optical modulator
26 ... Objective lens
27 ... Glass substrate
28 ... resist
29, 64 ... Spindle motor
30 ... Rotation detector
31 ... Rotary servo circuit
32 ... Feeding unit
33 ... Position detector
34 ... Feed servo circuit
40. Frame signal generator
41 ... Gate signal generator for ODD / EVEN judgment
42 ... Determinator
43 ... Switch
44. Recording pre-information generator
50 ... Pickup
51 ... Driver
52. Strategy circuit
53 ... DVD encoder
54. Bandpass filter
55 ... Trap circuit
56: Pre-pit detection unit
57, 67, 73 ... Phase comparison section
58 ... Phase shifter
59 ... Pre-pit decoder
60 ... Phase modulation decoder
61 ... PLL section
62 ... Spindle controller
63 ... CPU
65, 66, 71, 72, 80 ... frequency divider
68, 74 ... Equalizer
69 ... VCO
70: Reference signal generator
75 ... Spindle servo section
B ... Light beam
C ... Cutting device
S: Information recording device
SP ... Light spot
SY ... Synchronization information
CLK: Clock signal
WP1 ... 1st wobble PLL section
WP2 ... 2nd wobble PLL section
L_L, L_G, B ... Light beam
S_PP... Pre-information
S_R... Recording pre-information
S_S... One-turn detection signal
S_E... EVEN frame signal
S_O... ODD frame signal
S_J... judgment signal
S_W... Wobbling signal
S_G... Gate signal
S_H... First frame signal
S_RE... Even number recording pre-information
S_RO... Odd record pre-information
S_EC... EVEN frame count signal
S_C... Count signal
Sr: Recorded data
Swc: Recording clock signal
Sec ... Modulation signal
Stt ... Recording signal
Sdp: Amplified recording signal
Sp: Detection signal
Swp1, Swp2 ... wobble detection signal
Scl, Swcl, Sap ... Clock signal
Sdc: Drive control signal
Spp ... Pre-pit signal
Scp ... Comparison signal
Sps: Phase shift signal
Spad ... decoded pre-pit signal
Shad: Decoding address signal
Sct ... Control signal

Claims (16)

The recording information is formed adjacent to the information track on which the recording information is recorded, and the control information used for controlling the recording of the recording information is recorded by pre-pits by being reproduced when the recording information is recorded. With adjacent tracks,
It is formed with a meandering waveform corresponding to a wobbling signal obtained by multiplexing a sub-signal having a predetermined sub-frequency higher than the basic frequency with respect to a basic signal having a predetermined basic frequency. and it has a said information track,
An information recording medium, wherein the meandering waveform in the information track at a position adjacent to the prepit in the information track is formed corresponding to the wobbling signal including only the basic signal. The information recording medium according to claim 1 ,
An information recording medium, wherein the sub-signal is phase-modulated based on predetermined information set in advance. The information recording medium according to claim 2 ,
The information recording medium is a disc-shaped information recording medium in which the information track and the adjacent track are spirally formed,
The recording information is composed of a plurality of information units,
The pre-pit is formed only on the adjacent track adjacent to the information track in which either the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded,
Further, the meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal is the information in which either the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded. An information recording medium provided only in an area on a track. The information recording medium according to claim 2 or 3 ,
The information recording medium, wherein the predetermined information is predetermined information used for controlling recording of the recording information by being reproduced when the recording information is recorded together with the control information. In the information recording medium according to any one of claims 1 to 4 ,
The information recording medium is a DVD-R / W (DVD-ReWritable),
The fundamental frequency is 140 kilohertz;
Furthermore, the sub-frequency is 840 kilohertz. A medium manufacturing apparatus for manufacturing the information recording medium according to claim 1,
Generating means for generating the wobbling signal;
Generating means for generating a prepit signal for forming the prepit;
The wobbling signal is generated from the generating means, and the information track is formed by wobbling corresponding to the generated wobbling signal,
Forming means for forming the adjacent track while forming the prepit based on the generated prepit signal ;
The medium manufacturing apparatus according to claim 1, wherein the wobbling signal corresponding to the meandering waveform in the information track at a position adjacent to the prepit in the information track includes only the basic signal. The medium manufacturing apparatus according to claim 6 , wherein
The medium manufacturing apparatus, wherein the sub-signal is phase-modulated based on predetermined information set in advance. The medium manufacturing apparatus according to claim 7 , wherein
The information recording medium is a disc-shaped information recording medium in which the information track and the adjacent track are spirally formed,
The recording information is composed of a plurality of information units,
The forming means forms the pre-pit only on the adjacent track adjacent to the information track in which either the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded. With
A meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal is recorded on the information track in which either the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded. A medium manufacturing apparatus characterized in that it is provided only in the area. The medium manufacturing apparatus according to claim 7 or 8 ,
The medium manufacturing apparatus according to claim 1, wherein the predetermined information is predetermined information used for controlling recording of the recording information by being reproduced when the recording information is recorded together with the control information. In the medium manufacturing apparatus according to any one of claims 6 to 9 ,
The information recording medium is a DVD-R / W,
The fundamental frequency is 140 kilohertz;
Further, the sub-frequency is 840 kilohertz. Detection means for detecting the wobbling signal and the pre-pit from the information recording medium according to claim 1, when recording the recording information on the information track,
Extraction means for extracting the sub-signal from the detected wobbling signal;
Generating means for generating a recording reference signal for recording the recording information based on the extracted sub-signal;
Replaying means for replaying the control information based on the detected pre-pits ,
The information detecting apparatus, wherein the meandering waveform in the information track at a position adjacent to the prepit in the information track is formed corresponding to the wobbling signal including only the basic signal. The information detection device according to claim 11 ,
The sub-signal is phase-modulated based on predetermined information set in advance,
An information detection apparatus, further comprising second extraction means for extracting the predetermined information from the detected wobbling signal. The information detection apparatus according to claim 12 ,
The information recording medium is a disc-shaped information recording medium in which the information track and the adjacent track are spirally formed,
The recording information is composed of a plurality of information units,
The pre-pit is formed only on the adjacent track adjacent to the information track in which either the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded,
Furthermore, the meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal has the information track in which either the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded. An information detection apparatus characterized by being provided only in the upper region. The information detection device according to claim 12 or 13 ,
The predetermined information is predetermined information used for controlling recording of the recording information by being reproduced when the recording information is recorded together with the control information, and the extracted predetermined information is reproduced. An information detecting apparatus, further comprising a second reproducing means. In the information detection device according to any one of claims 11 to 14 ,
The information recording medium is a DVD-R / W,
The fundamental frequency is 140 kilohertz;
The sub-frequency is 840 kilohertz. An information detection device according to any one of claims 11 to 15 ,
Recording means for recording the recording information on the information track based on at least one of the reproduced control information or the reproduced predetermined information and the generated recording reference signal;
An information recording apparatus comprising:

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