JP3052858B2 - Method and apparatus for automatically adjusting digital signal recording and reproduction - Google Patents
Method and apparatus for automatically adjusting digital signal recording and reproductionInfo
- Publication number
- JP3052858B2 JP3052858B2 JP8313249A JP31324996A JP3052858B2 JP 3052858 B2 JP3052858 B2 JP 3052858B2 JP 8313249 A JP8313249 A JP 8313249A JP 31324996 A JP31324996 A JP 31324996A JP 3052858 B2 JP3052858 B2 JP 3052858B2
- Authority
- JP
- Japan
- Prior art keywords
- recording
- reproduction
- signal
- reproducing
- test data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Digital Magnetic Recording (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、記録媒体にディジ
タル信号を高密度に記録するディジタル信号の記録再生
の自動調整方法及び装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for automatically adjusting the recording and reproduction of digital signals for recording digital signals on a recording medium at a high density.
【０００２】[0002]
【従来の技術】従来、記録媒体にディジタル信号を記録
する装置で記録調整最適化を行うものとしては、特開平
２−２１４０３号公報「磁気記録回路」の出願のような
最短記録波長の単一周波数のテスト信号を記録再生して
再生信号レベルが最大になるよう記録電流を制御するこ
とで記録調整最適化を行うというものである。2. Description of the Related Art Conventionally, an apparatus for recording a digital signal on a recording medium for optimizing recording adjustment is disclosed in Japanese Unexamined Patent Publication No. Hei. The recording adjustment is optimized by recording and reproducing the test signal of the frequency and controlling the recording current so that the reproduction signal level is maximized.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来のディジタル信号記録再生装置では、ある特定のテス
ト信号のみで記録電流を制御して最適化を行っているた
め、磁気ヘッドのバラツキによって磁気媒体の深さ方向
への磁化力が一定とならず、磁気媒体の記録位相特性が
変化してしまい結果エラーレートや互換再生特性の悪化
を招いてしまうという問題があった。However, in the conventional digital signal recording / reproducing apparatus described above, the recording current is controlled only by a specific test signal to optimize the recording current. There has been a problem that the magnetization force in the depth direction is not constant, and the recording phase characteristic of the magnetic medium changes, resulting in deterioration of an error rate and compatible reproduction characteristics.
【０００４】本発明は上記問題を解決するもので、磁気
ヘッドのバラツキに対しても安定なエラーレートや互換
再生特性が得られるディジタル信号記録再生の自動調整
方法及び装置を提供することを目的とする。An object of the present invention is to provide a method and an apparatus for automatically adjusting digital signal recording / reproducing which can provide a stable error rate and a compatible reproducing characteristic even with variations in a magnetic head. I do.
【０００５】[0005]
【課題を解決するための手段】本発明は上記目的を達成
するために、記録媒体の深さ方向の磁化力を記録する最
小反転間隔以上の長さの反転間隔のテストデータを記録
再生し、再生信号中から奇数次高調波を減衰して得られ
た再生信号レベルが目標値になるように記録電流を制御
し、次いで最小反転間隔付近の記録周波数特性補償を最
小反転間隔付近のテストデータを記録再生したときに最
大再生信号レベルの得られるように記録周波数特性補償
を制御するものである。 In order to achieve the above object, the present invention records and reproduces test data having a reversal interval longer than a minimum reversal interval for recording a magnetizing force in a depth direction of a recording medium, The recording current is controlled so that the level of the reproduced signal obtained by attenuating the odd-order harmonics from the reproduced signal becomes the target value, and then the recording frequency characteristic compensation near the minimum inversion interval is performed using the test data near the minimum inversion interval. The recording frequency characteristic compensation is controlled so that the maximum reproduction signal level can be obtained when recording and reproducing .
【０００６】[0006]
【発明の実施の形態】本発明の請求項１〜４記載の発明
により、記録媒体の深さ方向の磁化力を記録する最小反
転間隔以上の反転間隔のテストデータを記録再生し、再
生信号中から奇数次高調波を減衰して得られた再生信号
レベルが目標値になるように記録電流を制御し、次いで
最小反転間隔付近の記録周波数特性補償を最小反転間隔
付近のテストデータを記録再生したときに最大再生信号
レベルの得られるように記録周波数特性補償を制御す
る。 The invention of claim 1-4, wherein of the embodiment of the present invention, the test data of the minimum inversion interval or inversion interval of recording the magnetizing force in the depth direction of the recording medium recording reproduction, the reproduction signal in The recording current was controlled so that the reproduced signal level obtained by attenuating the odd-order harmonics from the target value became the target value. Then, the recording frequency characteristic compensation near the minimum inversion interval was performed, and the test data near the minimum inversion interval was recorded and reproduced. Sometimes, the recording frequency characteristic compensation is controlled so that the maximum reproduction signal level can be obtained .
【０００７】以下、本発明の一実施の形態について、図
面を参照しながら説明する。図１は、本発明の一実施の
形態におけるディジタル信号記録再生の自動調整装置の
ブロック図である。Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an automatic adjustment apparatus for recording and reproducing digital signals according to an embodiment of the present invention.
【０００８】図１において、１０１は連続するビット数
が２から７に制限された８−１４変調方式で記録データ
を生成する記録プロセス部、１０２は記録マスタークロ
ックｆｍｃｌｋの１／２２周期のテストデータを生成す
る第一パターン発生器、１０３は前記記録プロセス部で
生成される最小反転間隔である記録マスタークロックｆ
ｍｃｌｋの１／４周期のテストデータを生成する第二パ
ターン発生器、１０４は前記記録プロセス部１０１から
の記録データと第一パターン発生器１０２からのテスト
データと第二パターン発生器１０３からのテストデータ
を切り換えて出力する記録データ切換器である。In FIG. 1, reference numeral 101 denotes a recording process unit for generating recording data by an 8-14 modulation method in which the number of consecutive bits is limited to 2 to 7, and 102 denotes test data of 1/22 cycle of the recording master clock fmclk. The first pattern generator 103 generates a recording master clock f which is the minimum inversion interval generated by the recording process unit.
A second pattern generator 104 for generating test data of 周期 cycle of mclk is a print data from the print processing unit 101, test data from the first pattern generator 102, and a test from the second pattern generator 103. This is a recording data switch for switching and outputting data.
【０００９】１０５は記録電流を制御する記録電流可変
器、１０６は最小反転間隔の周波数付近の周波数特性を
補償する記録周波数特性補償可変器、１０７は１８０度
対向の記録ヘッドに信号を振り分ける記録ヘッドスイッ
チ、１０８は記録信号を回転シリンダーに信号を伝送す
る記録用回転トランスと再生信号を回転シリンダーから
再生回路に信号を伝送する再生用回転トランスで構成さ
れた回転トランス部、１０９ａおよび１０９ｂは回転シ
リンダーに１８０度対向に配置された記録ヘッド、１１
０は磁気テープである。Reference numeral 105 denotes a recording current variable unit for controlling a recording current; 106, a recording frequency characteristic compensation variable unit for compensating a frequency characteristic near the frequency of the minimum inversion interval; 107, a recording head for distributing a signal to a 180-degree opposed recording head; The switch 108 is a rotary transformer section composed of a recording rotary transformer for transmitting a recording signal to a rotary cylinder and a reproducing rotary transformer for transmitting a reproduced signal from the rotary cylinder to a reproducing circuit, and 109a and 109b are rotary cylinders. , Recording heads arranged 180 degrees opposite to each other, 11
0 is a magnetic tape.
【００１０】１１１ａおよび１１１ｂは回転シリンダー
に１８０度対向で前記記録ヘッド１０９ａおよび１０９
ｂに対し９０度離れた位置に配置された再生ヘッド、１
１２は前記再生ヘッド１１１ａおよび１１１ｂからの再
生信号を切り換える再生ヘッドスイッチ、１１３は再生
信号を増幅する再生アンプ、１１４は電磁変換系の微分
特性を補償する積分器、１１５は電磁変換系で生じるピ
ークシフトや符号間干渉を補償する波形等化器、１１６
は前記第一パターン発生器１０２で生成するテストデー
タの基本波の第三次高調波を減衰させる第三次高調波ト
ラップフィルタ、１１７はナイキストの第一定理を満た
すローパスフィルタである。[0011] The recording heads 109a and 109b are opposed to the rotary cylinder by 180 degrees.
b, a reproducing head disposed at a position 90 degrees away from b,
12, a reproducing head switch for switching the reproducing signals from the reproducing heads 111a and 111b, 113, a reproducing amplifier for amplifying the reproducing signal, 114, an integrator for compensating for the differential characteristics of the electromagnetic conversion system, and 115, a peak generated in the electromagnetic conversion system. Waveform equalizer for compensating for shifts and intersymbol interference, 116
Is a third harmonic trap filter that attenuates the third harmonic of the fundamental wave of the test data generated by the first pattern generator 102, and 117 is a low-pass filter that satisfies Nyquist's first constant.
【００１１】１１８は再生信号の検波レベルを検出する
エンベ検波器、１１９は波形等化後の再生信号を２値化
する量子化器、１２０は前記量子化器からの再生データ
中に含まれるマスタークロックを再生し再生データに位
相ロックするクロック再生ＰＬＬ、１２１は前記量子化
器からの再生データを前記クロック再生ＰＬＬのクロッ
クのタイミングで再生データを識別する識別器、１２２
は前記識別器からのデータの誤り率を計測する誤り率計
測器、１２３は記録再生のタイミングを制御するサーボ
部、１２４は前記記録データ切換器１０４と記録電流可
変器１０５と記録周波数特性補償可変器１０６と波形等
化器１１５と第三次高調波トラップフィルタ１１６を制
御するシステムコントロール部である。Reference numeral 118 denotes an envelope detector for detecting a detection level of the reproduced signal, 119 denotes a quantizer for binarizing the reproduced signal after waveform equalization, and 120 denotes a master included in the reproduced data from the quantizer. A clock recovery PLL 121 for recovering a clock and phase-locking the reproduced data with the reproduced data 121 is an identifier for identifying the reproduced data from the quantizer at the timing of the clock of the clock reproducing PLL 122.
Is an error rate measuring device for measuring an error rate of data from the discriminator, 123 is a servo unit for controlling recording / reproducing timing, and 124 is the recording data switch 104, recording current variable device 105, and recording frequency characteristic compensation variable. And a system control unit for controlling the waveform equalizer 115, the third harmonic trap filter 116, and the like.
【００１２】以上のように構成された本実施の形態のデ
ィジタル信号記録再生の自動調整装置の動作を、図２か
ら図５を用いて説明する。図２は図１の第一パターン発
生器のテストデータ記録再生時の再生スペクトラム図
で、図３は図１の記録電流調整における記録電流対再生
エンベ出力特性図で、図４は図１の記録周波数特性補償
調整における記録周波数特性補償対再生エンベ出力特性
図で、図５は図１の記録周波数特性補償調整における記
録周波数特性補償対エラーレート特性図である。The operation of the automatic adjustment apparatus for recording and reproducing digital signals according to the present embodiment configured as described above will be described with reference to FIGS. 2 is a reproduction spectrum diagram at the time of test data recording / reproduction of the first pattern generator of FIG. 1, FIG. 3 is a graph showing a recording current versus reproduction envelope output characteristic in the recording current adjustment of FIG. 1, and FIG. FIG. 5 is a diagram showing a recording frequency characteristic compensation versus an error rate characteristic in the recording frequency characteristic compensation adjustment in FIG. 1.
【００１３】まず記録電流の調整であるが、システムコ
ントロール部１２４から記録側の記録電流可変器１０５
と記録周波数特性補償可変器１０６に対し初期化設定が
され、また再生側の波形等化器１１５は等化補償を最低
に設定され第三次高調波トラップフィルタ１１６はトラ
ップオン状態に設定される。記録データはシステムコン
トロール部１２４の制御で第一パターン発生器１０２か
らのテストデータが記録データ切換器１０４で選択され
る。First of all, the adjustment of the recording current is performed.
And the recording frequency characteristic compensation variable device 106 are initialized, the waveform equalizer 115 on the reproduction side is set to the lowest equalization compensation, and the third harmonic trap filter 116 is set to a trap-on state. . The test data from the first pattern generator 102 is selected by the print data switch 104 under the control of the system control unit 124.
【００１４】前記テストデータは、記録電流可変器１０
５で増幅され記録周波数特性補償可変器１０６で周波数
特性補償された後記録ヘッドスイッチ１０７でサーボ部
１２３の制御により振り分けられ回転トランス部１０８
を介して記録ヘッド１０９ａおよび１０９ｂに伝送され
磁気テープ１１０に記録される。前記磁気テープ１１０
に記録されたテストデータはすぐに再生ヘッド１１１ａ
および１１１ｂにより再生され回転トランス部１０８を
介して再生ヘッドスイッチ１１２に伝送されサーボ部１
２３の制御により前記再生ヘッド１１１ａからの再生信
号と前記再生ヘッド１１１ｂからの再生信号が結合され
再生信号になる。The test data is stored in a recording current variable device 10.
After being amplified at 5 and subjected to frequency characteristic compensation by the recording frequency characteristic compensation variable device 106, the recording head switch 107 distributes the signal under the control of the servo unit 123 and the rotary transformer unit 108
Are transmitted to the recording heads 109a and 109b via the. The magnetic tape 110
The test data recorded in the read head 111a
And 111b, are transmitted to the reproducing head switch 112 via the rotary transformer 108, and are transmitted to the servo 1
Under the control of 23, the reproduction signal from the reproduction head 111a and the reproduction signal from the reproduction head 111b are combined to form a reproduction signal.
【００１５】前記再生信号は再生アンプ１１３で増幅さ
れ積分器１１４で電磁変換系の微分特性が補償され波形
等化器１１５では等化補償を最低に設定しているので中
高域周波数の振幅が抑え込まれ更に第三次高調波トラッ
プフィルタ１１６で前記第一パターン発生器１０２で生
成するテストデータの基本波の第三次高調波が減衰され
ローパスフィルタ１１７を通過後はほぼ前記第一パター
ン発生器１０２で生成するテストデータの基本波のみの
再生信号が得られる。The reproduction signal is amplified by the reproduction amplifier 113, the differential characteristic of the electromagnetic conversion system is compensated by the integrator 114, and the equalization compensation is set to the minimum by the waveform equalizer 115. Further, the third harmonic trap filter 116 attenuates the third harmonic of the fundamental wave of the test data generated by the first pattern generator 102, and after passing through the low-pass filter 117, the third harmonic trap filter 116 substantially removes the first harmonic. A reproduced signal of only the fundamental wave of the test data generated in 102 is obtained.
【００１６】図２は、前記第一パターン発生器１０２で
生成するテストデータを記録再生したときのローパスフ
ィルタ１１７で通常再生状態での設定と波形等化器１１
５での等化補償を最低にし第三次高調波トラップフィル
タ１１６でトラップオン状態に設定したときの再生信号
スペクトラムを比較したものであるが、同図破線に示す
ように奇数次高調波が減衰されていることがわかる。前
記再生信号はエンベ検波器１１８で検波されシステムコ
ントロール部１２４に供給される。FIG. 2 shows the setting of the low-pass filter 117 in the normal reproduction state and the waveform equalizer 11 when the test data generated by the first pattern generator 102 is recorded and reproduced.
5 is a comparison of the reproduction signal spectrum when the equalization compensation at 5 is minimized and the third harmonic trap filter 116 is set to the trap-on state. As shown by the broken line in FIG. You can see that it is done. The reproduced signal is detected by an envelope detector 118 and supplied to a system control unit 124.
【００１７】システムコントロール部１２４では、前記
エンベ検波器１１８からの検波レベルと目標値を比較し
その比較結果から前記記録電流可変器１０５を制御し記
録電流の最適調整を行う。記録電流の調整プロセスを図
３を用いて説明すると、前記第一パターン発生器１０２
で生成するテストデータを前記記録電流可変器１０５で
記録電流値を可変させながら記録再生し、再生信号の検
波レベルが図３の斜線部内に入る様制御される。The system control section 124 compares the detection level from the envelope detector 118 with a target value , controls the recording current variable device 105 based on the comparison result, and performs optimum adjustment of the recording current. The process of adjusting the recording current will be described with reference to FIG.
The test data generated in step (1) is recorded / reproduced while varying the recording current value by the recording current variable device 105, and the detection level of the reproduced signal is controlled to fall within the shaded area in FIG.
【００１８】次いで記録周波数特性補償の調整である
が、システムコントロール部１２４から再生側の波形等
化器１１５は等化補償を最適状態に設定され第三次高調
波トラップフィルタ１１６はトラップオフ状態に設定さ
れる。記録データはシステムコントロール部１２４の制
御で第二パターン発生器１０３からのテストデータが記
録データ切換器１０４で選択される。前記テストデータ
は前記した記録電流調整と同様の信号経路で記録再生を
行い等化後の再生信号はエンベ検波器１１８で検波され
システムコントロール部１２４に供給される。Next, regarding the adjustment of the recording frequency characteristic compensation, the waveform equalizer 115 on the reproducing side is set to the optimum state by the system control unit 124 and the third harmonic trap filter 116 is set to the trap-off state. Is set. As the recording data, test data from the second pattern generator 103 is selected by the recording data switch 104 under the control of the system control unit 124. The test data is recorded and reproduced on the same signal path as the recording current adjustment described above, and the reproduced signal after equalization is detected by the envelope detector 118 and supplied to the system control unit 124.
【００１９】前記第二パターン発生器１０３のテストデ
ータでの記録周波数特性補償の調整プロセスを図４を用
いて説明すると、前記第二パターン発生器１０３で生成
するテストデータを前記記録周波数特性補償可変器１０
６で記録周波数特性補償値を可変させながら記録再生
し、再生信号の検波レベルがピークを示すＡ点の調整値
ＲｅｃＦｒｅｑ１を求める。The adjustment process of the recording frequency characteristic compensation with the test data of the second pattern generator 103 will be described with reference to FIG. 4. The test data generated by the second pattern generator 103 is adjusted by the recording frequency characteristic compensation variable. Vessel 10
In step 6, recording and reproduction are performed while varying the recording frequency characteristic compensation value, and an adjustment value RecFreq1 at point A where the detection level of the reproduction signal shows a peak is obtained.
【００２０】以上のように、本実施の形態のディジタル
信号記録再生の自動調整装置によれば、記録媒体への記
録深さが一定になるように記録電流を制御することで記
録媒体上の記録位相特性を安定化させ、最短記録波長点
の記録周波数特性補償を行うので、互換再生特性が安定
となる効果がある。As described above, according to the automatic digital signal recording / reproducing apparatus of the present embodiment, recording on the recording medium is controlled by controlling the recording current so that the recording depth on the recording medium is constant. Since the phase characteristics are stabilized and the recording frequency characteristics at the shortest recording wavelength point are compensated, there is an effect that the compatible reproduction characteristics become stable.
【００２１】また、更に調整精度を向上させるための手
段を説明する。記録データを前記システムコントロール
部１２４の制御で記録プロセス部１０１のデータが前記
記録データ切換器１０４で選択され前記した記録電流調
整と同様の信号経路で記録再生が行われる。等化後の再
生信号は、量子化器１１９で２値の再生データに量子化
されクロック再生ＰＬＬ１２０と識別器１２１に供給さ
れ、前記クロック再生ＰＬＬ１２０で再生データ中に含
まれるマスタークロックを抽出して位相ロックをかけ、
その再生クロックを用いて前記識別器１２１で前記再生
データを識別する。識別された再生データと再生クロッ
クは誤り率計測器１２２に供給され前記再生データの誤
り率が計測され計測結果が前記システムコントロール部
１２４に供給される。A means for further improving the adjustment accuracy will be described. The recording data is controlled by the system control unit 124, the data of the recording process unit 101 is selected by the recording data switch 104, and recording and reproduction are performed on the same signal path as the recording current adjustment. The reproduced signal after the equalization is quantized into binary reproduced data by a quantizer 119 and supplied to a clock reproducing PLL 120 and an identifier 121. The clock reproducing PLL 120 extracts a master clock included in the reproduced data. Apply phase lock,
The discriminator 121 identifies the reproduced data using the reproduced clock. The identified reproduction data and reproduction clock are supplied to an error rate measuring device 122, and the error rate of the reproduction data is measured, and the measurement result is supplied to the system control section 124.
【００２２】前記記録プロセス部１０１の記録データで
の記録周波数特性補償の調整プロセスを図４を用いて説
明すると、前記記録周波数特性補償可変器１０６で記録
周波数特性補償値を前記ＲｅｃＦｒｅｑ１のプラスマイ
ナスＸの範囲で記録周波数特性補償値を可変させながら
記録再生して再生データの誤り率を計測し、誤り率が最
小を示すＢ点の調整値ＲｅｃＦｒｅｑ２を求める。前記
ＲｅｃＦｒｅｑ１とＲｅｃＦｒｅｑ２から最適な記録周
波数特性補償を計算し前記記録周波数特性補償可変器１
０６に設定する。The adjustment process of the recording frequency characteristic compensation with the recording data by the recording process unit 101 will be described with reference to FIG. 4. The recording frequency characteristic compensation value is calculated by the recording frequency characteristic compensation variable unit 106 to be ± X of RecFreq1. The recording / reproducing is performed while varying the recording frequency characteristic compensation value within the range, and the error rate of the reproduced data is measured, and the adjustment value RecFreq2 at the point B where the error rate is minimum is obtained. The optimum recording frequency characteristic compensation is calculated from the RecFreq1 and RecFreq2, and the recording frequency characteristic compensation variable unit 1 is calculated.
Set to 06.
【００２３】以上のように、本実施の形態のディジタル
信号記録再生の自動調整装置によれば、記録周波数特性
補償制御を記録再生最大出力点の調整値と再生データ誤
り率最小点の調整値とを演算して行うので、より安定な
互換再生特性が得られる効果がある。As described above, according to the digital signal recording / reproducing automatic adjusting device of the present embodiment, the recording frequency characteristic compensation control is performed by adjusting the recording / reproducing maximum output point adjustment value and the reproduction data error rate minimum point adjustment value. Is calculated, so that more stable compatible reproduction characteristics can be obtained.
【００２４】なお、以上の実施の形態では第一パターン
発生器１０２と第二パターン発生器１０３は記録プロセ
ス部１０１からの記録マスタークロックｆｍｃｌｋに同
期させてテストパターンを生成しているが、非同期で同
期させて生成するテストパターンの周期に極めて近い反
転間隔のテストパターンを生成しても同様の効果が得ら
れる。In the above embodiment, the first pattern generator 102 and the second pattern generator 103 generate test patterns in synchronization with the recording master clock fmclk from the recording processing unit 101. A similar effect can be obtained by generating a test pattern having an inversion interval very close to the cycle of the test pattern generated in synchronization.
【００２５】[0025]
【発明の効果】以上の説明から明らかなように、本発明
のディジタル信号記録再生の自動調整方法及び装置によ
れば、第一パターン信号発生手段で生成されるテストデ
ータを用いて記録媒体への磁化力の記録深さが一定とな
るように記録電流可変器が制御されるので記録位相特性
が一定となり、また第二パターン信号発生手段で生成さ
れるテストデータを用いたときに記録状態が最良となる
ように記録周波数特性補償可変器を制御するので、記録
ヘッドの特性バラツキによるエラーレート特性の悪化を
防ぐことができ良好な互換再生特性が得られるという効
果がある。また、前記記録周波数特性補償値と通常の記
録データを用いたときのエラーレート最小点の記録周波
数特性補償値とから最適な記録周波数特性補償可変器を
制御するようにすれば、更に良好な互換再生特性が得ら
れるという効果がある。As is apparent from the above description, according to the method and apparatus for automatically adjusting the recording / reproduction of digital signals of the present invention, the test data generated by the first pattern signal generating means is used to write data to the recording medium. Since the recording current variable device is controlled so that the recording depth of the magnetizing force is constant, the recording phase characteristic is constant, and the recording state is best when the test data generated by the second pattern signal generating means is used. Since the variable recording frequency characteristic compensator is controlled in such a manner as described above, it is possible to prevent the error rate characteristic from deteriorating due to variations in the characteristics of the recording head, and to obtain an excellent compatible reproduction characteristic. Further, if the optimum recording frequency characteristic compensation variable device is controlled from the recording frequency characteristic compensation value and the recording frequency characteristic compensation value at the minimum error rate when normal recording data is used, better compatibility is achieved. There is an effect that reproduction characteristics can be obtained.
【図１】本発明の一実施の形態におけるディジタル信号
記録再生の自動調整装置のブロック図FIG. 1 is a block diagram of an automatic digital signal recording / reproducing apparatus according to an embodiment of the present invention.
【図２】図１の第一パターン発生器のテストデータ記録
再生時の再生スペクトラム図FIG. 2 is a reproduction spectrum diagram at the time of test data recording and reproduction of the first pattern generator of FIG. 1;
【図３】図１の記録電流調整における記録電流対再生エ
ンベ出力特性図FIG. 3 is a graph showing recording current versus reproduction envelope output characteristics in the recording current adjustment of FIG. 1;
【図４】図１の記録周波数特性補償調整における記録周
波数特性補償対再生エンベ出力特性図FIG. 4 is a diagram showing recording frequency characteristic compensation versus reproduction envelope output characteristics in the recording frequency characteristic compensation adjustment of FIG. 1;
【図５】図１の記録周波数特性補償調整における記録周
波数特性補償対エラーレート特性図FIG. 5 is a diagram showing recording frequency characteristic compensation versus error rate characteristics in the recording frequency characteristic compensation adjustment of FIG. 1;
１０１ 記録プロセス部 １０２ 第一パターン発生器 １０３ 第二パターン発生器 １０４ 記録データ切換器 １０５ 記録電流可変器 １０９ａ，１０９ｂ 記録ヘッド １１０ 磁気テープ １１１ａ，１１１ｂ 再生ヘッド １１５ 波形等化器 １１６ 第三次高調波トラップフィルタ １１８ エンベ検波器 １１９ 量子化器 １２０ クロック再生ＰＬＬ １２１ 識別器 １２２ 誤り率計測器 １２４ システムコントロール部 DESCRIPTION OF SYMBOLS 101 Recording process part 102 First pattern generator 103 Second pattern generator 104 Recording data switch 105 Recording current variable device 109a, 109b Recording head 110 Magnetic tape 111a, 111b Reproduction head 115 Waveform equalizer 116 Third harmonic Trap filter 118 envelope detector 119 quantizer 120 clock recovery PLL 121 discriminator 122 error rate measuring instrument 124 system control section
Claims (4)
る最小反転間隔以上の長さの反転間隔のテストデータを
記録再生し、再生信号中から奇数次高調波を減衰して得
られた再生信号レベルが目標値になるように記録電流を
制御し、次いで最小反転間隔付近の記録周波数特性補償
を最小反転間隔付近のテストデータを記録再生したとき
に最大再生信号レベルの得られた調整値になるように記
録周波数特性補償を制御するディジタル信号記録再生の
自動調整方法。1. A magnetic force in a depth direction of a recording medium is obtained by recording and reproducing test data having a reversal interval longer than a minimum reversal interval to be recorded, and attenuating odd-order harmonics in a reproduced signal. Control the recording current so that the reproduced signal level reaches the target value, and then adjust the recording frequency characteristics near the minimum inversion interval to obtain the maximum reproduction signal level when recording and reproducing test data near the minimum inversion interval. A method for automatically adjusting recording and reproduction of digital signals in which recording frequency characteristic compensation is controlled so as to obtain a value.
の長さの反転間隔のテストデータを生成する第一パター
ン信号発生手段と、記録媒体上に記録する最小反転間隔
のテストデータを生成する第二パターン信号発生手段
と、記録プロセス回路で生成される記録データと第一パ
ターン信号発生手段と第二パターン信号発生手段で生成
されるテストデータを切り換える記録信号切り換え手段
と、記録電流を制御する記録電流可変手段と、記録媒体
上に記録する最小反転間隔の周波数付近の周波数特性を
補償する記録周波数特性補償手段と、記録媒体に信号を
記録再生する記録再生手段と、再生信号の波形等化量を
制御する波形等化量可変手段と、前記第一パターン信号
発生手段で生成するテストデータの基本波の第三次高調
波を減衰する第三次高調波除去手段と、再生等化後の再
生信号レベルを検出する再生信号レベル検出手段と、前
記再生レベル検出手段からの再生信号レベルにより前記
記録電流可変手段と前記記録周波数特性補償手段のうち
少なくとも１つを制御するシステムコントロール手段と
を備えたディジタル信号記録再生の自動調整装置。2. A first pattern signal generating means for generating test data having an inversion interval longer than a minimum inversion interval to be recorded on a magnetic medium, and generating test data having a minimum inversion interval to be recorded on a recording medium. A second pattern signal generating unit, a recording signal switching unit for switching between recording data generated by the recording process circuit and test data generated by the first pattern signal generating unit and the second pattern signal generating unit, and controlling a recording current. Recording current variable means, recording frequency characteristic compensating means for compensating frequency characteristics near the frequency of the minimum inversion interval to be recorded on the recording medium, recording / reproducing means for recording / reproducing a signal on / from the recording medium, and waveform equalization of the reproduced signal A waveform equalization amount varying means for controlling the amount, and a third order attenuating a third harmonic of a fundamental wave of the test data generated by the first pattern signal generating means. And harmonic removal means, and the reproduced signal level detecting means for detecting the reproduced signal level after playback equalization before
The reproduction signal level from the reproduction level detection means.
Recording current varying means and the recording frequency characteristic compensating means
An automatic adjustment apparatus for digital signal recording / reproduction, comprising: a system control means for controlling at least one .
の自動調整装置の記録電流の調整において、第一パター
ン信号発生手段からのテストデータを記録信号切り換え
手段で選択して記録再生手段で記録媒体に記録再生し、
第三次高調波除去手段で前記第一パターン信号発生手段
で生成したテストデータの基本波の第三次高調波を減衰
して得られた再生信号を再生信号レベル検出手段で検出
し、調整目標値と比較して、その結果より記録電流可変
手段を制御して記録媒体への磁化深さを決定することを
特徴とするディジタル信号記録再生の自動調整装置。3. The test signal from the first pattern signal generating means is selected by the recording signal switching means, and the recording medium is adjusted by the recording / reproducing means. Record and play back
The reproduction signal obtained by attenuating the third harmonic of the fundamental wave of the test data generated by the first pattern signal generation means by the third harmonic removal means is detected by the reproduction signal level detection means, and the adjustment target is adjusted. A digital signal recording / reproducing automatic adjustment device, wherein a recording current variable means is controlled based on a result of the comparison, and a magnetization depth in a recording medium is determined based on the result.
の自動調整装置の記録周波数特性補償の調整において、
第二パターン信号発生手段からのテストデータを記録信
号切り換え手段で選択して記録再生手段で記録媒体に記
録再生して得られた再生信号を再生信号レベル検出手段
で検出し、検出レベルが最大になるように記録周波数特
性補償手段を制御することを特徴とするディジタル信号
記録再生の自動調整装置。4. The adjustment of the recording frequency characteristic compensation of the automatic adjustment apparatus for digital signal recording and reproduction according to claim 2,
The test data from the second pattern signal generation means is selected by the recording signal switching means, and the reproduction signal obtained by recording / reproducing on the recording medium by the recording / reproduction means is detected by the reproduction signal level detection means. An automatic adjusting apparatus for digital signal recording / reproduction characterized by controlling a recording frequency characteristic compensating means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8313249A JP3052858B2 (en) | 1995-12-15 | 1996-11-25 | Method and apparatus for automatically adjusting digital signal recording and reproduction |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7-326743 | 1995-12-15 | ||
| JP32674395 | 1995-12-15 | ||
| JP8313249A JP3052858B2 (en) | 1995-12-15 | 1996-11-25 | Method and apparatus for automatically adjusting digital signal recording and reproduction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09223301A JPH09223301A (en) | 1997-08-26 |
| JP3052858B2 true JP3052858B2 (en) | 2000-06-19 |
Family
ID=26567496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8313249A Expired - Fee Related JP3052858B2 (en) | 1995-12-15 | 1996-11-25 | Method and apparatus for automatically adjusting digital signal recording and reproduction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3052858B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7937897B2 (en) | 2006-01-25 | 2011-05-10 | Yusenkaisha Japan Isusyc | Dome-shaped shelter |
-
1996
- 1996-11-25 JP JP8313249A patent/JP3052858B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7937897B2 (en) | 2006-01-25 | 2011-05-10 | Yusenkaisha Japan Isusyc | Dome-shaped shelter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09223301A (en) | 1997-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5682374A (en) | Recording medium having a recorded phase reference signal for fine adjustment of a phase sampling clock signal | |
| JPH0443349B2 (en) | ||
| JPH0590918A (en) | Apparatus and method for detecting digital signal | |
| JPH0458112B2 (en) | ||
| JP3052858B2 (en) | Method and apparatus for automatically adjusting digital signal recording and reproduction | |
| JP2661064B2 (en) | Data playback device | |
| KR100250596B1 (en) | Method of auto-adjustment of a digital signal record/reproduce and a digital signal record/reproduce | |
| JP2763454B2 (en) | Data detection device | |
| EP0700045A2 (en) | Reference clock generation circuit | |
| JPS6353609B2 (en) | ||
| JPS58199410A (en) | Magnetic recording method of digital signal | |
| JP3006683B2 (en) | Reproduction signal waveform control device for MR head | |
| JPS6356871A (en) | Digital data generating device | |
| JP2638219B2 (en) | Magnetic recording / reproducing circuit | |
| JP2578957B2 (en) | Digital magnetic recording system | |
| JP3225588B2 (en) | Digital signal regeneration circuit | |
| JP3906758B2 (en) | Digital signal recording device | |
| JP2000048489A (en) | Optical disk device, super-high resolution optical disk device and dwdd optical disk device | |
| KR200175746Y1 (en) | Data reproducing device | |
| KR0120410Y1 (en) | Data reconstruction device for digital magnetic recording reproducing systems | |
| TW200419546A (en) | Method and apparatus for dynamic readout decision level adjustment for use in domain expansion reading | |
| KR100300953B1 (en) | Device for recording/reproducing digital data and method therefor | |
| JPH10241170A (en) | Servo signal generator and disc drive employing it | |
| JPH04238104A (en) | Automatic equalization system for magnetic recording and reproduced signal | |
| JPH07334930A (en) | Reproducing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080407 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090407 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |