JPS619874A - Recording disk reproducing device - Google Patents

Abstract

PURPOSE:To brake movement of a signal detecting device without affected by the width between tracks and variation of response sensitivity by determining the timing of generation of a dumping signal while detecting the position of the signal detecting device after generation of a kick signal. CONSTITUTION:The device is provided with an extracting circuit 1 that extracts two tracking signals and an index signal from signals detected from a discoid recording medium 3 by the signal detecting device 2, a tracking signal extracting circuit 4, another tracking signal extracting circuit 5, an index signal extracting circuit 6, a tracking error signal generating circuit 7 and an adder circuit 8. A controlling device 11 made of a microprocessor, etc. counts number of tracks of an information signal passed by the signal detecting device 2 by a tracking error signal (g) simultaneously with generation of a kick signal (c) when the signal detecting device 2 is moved forcibly, and generates a dumping signal (d) simultaneously with completion of counting of the desired number of tracks.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、円盤状の記録媒体に螺旋状に記録された信号
（以下「情報信号」と称ず〉を検出し再生するビデオデ
ィスクプレーヤ等の記録円盤再生装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a recording medium such as a video disc player that detects and reproduces a signal (hereinafter referred to as "information signal") recorded in a spiral shape on a disc-shaped recording medium. This invention relates to a disc playback device.

従来例の４１成とその問題点 既に知られている様に、情報信電としては映像、音声、
文字、図形、データ等の信号が有り、これらの信号を正
確に検出するに眸情報信弓を検出する手段（以下「信号
検出手段」と称す）が正確に情報信号のトラックを走査
する必要が有る。The conventional 41 configuration and its problems are already known.
There are signals such as characters, figures, data, etc., and in order to accurately detect these signals, the means for detecting the eye information signal (hereinafter referred to as "signal detection means") must accurately scan the track of the information signal. Yes.

第１図は情報信号が螺旋状に記録媒体の外周から内周方
向に記録されている場合に信号検出手段が正確に情報信
号のトラックを走査していく様子を示している。第１図
に於て、実ｔｏ、Ａ　Ｌ；ｌ；情報信号の１〜ラツク、
一点鎖？ＪＢ及び二点鎖線Ｃは信号検出手段が正確に情
報信号のトラックを走査するために情報信号のトラック
の両側に１回転毎に交互に記録された２種類の信号（以
下「トラッキング信号」と称す）、斜線部りは２種類の
１−ラツキン゛グ信弓の極性を切換えるために利用する
信＠（以下「インデックス信号」と称す）の記録位置を
示している。このトラッキング誤差信号とインデックス
信号とを利用し、信号検出手段に正確に情報信号のトラ
ックを走査させる原理は次の様である。FIG. 1 shows how the signal detection means accurately scans the track of the information signal when the information signal is recorded spirally from the outer circumference to the inner circumference of the recording medium. In FIG. 1, the actual to, A L;
One point chain? JB and two-dot chain line C indicate two types of signals (hereinafter referred to as "tracking signals") that are alternately recorded on both sides of the information signal track every rotation in order for the signal detection means to accurately scan the information signal track. ), the shaded area indicates the recording position of a signal (hereinafter referred to as an "index signal") used to switch the polarity of two types of 1-locking signals. The principle of using the tracking error signal and index signal to cause the signal detection means to accurately scan the track of the information signal is as follows.

今、第１図に於て信号検出手段がＥの位置にあるとする
。この時信号検出手段は、情報信号と同時に両側のトラ
ッキング信号も検出する。信号検出手段が正確に所望の
トラックを走査するには、即ら情報信号のトラックのほ
ぼ中央を走査するには、Ｅの外周側に隣接しで記録され
た一方のトラッキング信号ａ　（以下ｆ’ｌＰ１信号」
と称す）と、Ｅの内周側に隣接して記録された他方のト
ラッキング化＠ｂ　（以下１”ｆＰ２信号」と称づ）と
の各々の検Ｔｈ＜ａ号の大きさが、はぼ等しくなる様に
信号検出手段を記録媒体の半径方向に制御すればよい。Assume now that the signal detection means is at position E in FIG. At this time, the signal detection means detects both tracking signals at the same time as the information signal. In order for the signal detection means to accurately scan a desired track, that is, to scan approximately the center of the track of the information signal, one tracking signal a (hereinafter f' lP1 signal”
The magnitude of Th The signal detection means may be controlled in the radial direction of the recording medium so that they are equal.

例えばＥの位置に於てｆ　Ｐ２信号すの検出信号がｆ　
Ｐ１信号ａよりも大きければ、信号検出手段が情報信号
のトラックの中央Ｊ：りし内周側に片よっている事にな
り、この時は信号検出手段を外周側に移動させれば良い
のである。ところがこの２種類のトラッキング信号ａ、
ｂは１回転毎に交互に記録されているため、次の様な処
ηが必要である。For example, at position E, the detection signal of f P2 signal is f
If it is larger than the P1 signal a, it means that the signal detection means is biased toward the inner circumference of the center of the track of the information signal, and in this case, it is sufficient to move the signal detection means toward the outer circumference. . However, these two types of tracking signals a,
Since b is recorded alternately every rotation, the following processing η is required.

今、信号検出手段がＥのトラックより１つ内周側の情報
信号のトラックの位置Ｆにあるどする。Now, assume that the signal detection means is located at position F of the information signal track one track inner than track E.

ｆ　Ｐ２信号すの検出信号の大ぎさがｆＰ１信＠ａより
も大ぎい時、Ｅの位置と同じ様に信号検出手段を外周方
向に移動させれば、増々情報信号の１へラックＪ−り離
れる事になり、正確に走査出来なくなる。このため、１
回転毎にｆ　Ｐ１信号ａど、ｆ　Ｐ２信＠ｂとの記録の
切換位置に記録されたインデックス信号を次の様に利用
する。第１図に於て、Ｅの位置にあった信号検出手段が
正確に走査しなからＤの位置に来て、インデックス信号
を検ｊ１旨りる。この時点でスイッチング信号を発生さ
せ、信号検出手段の半径方向の制御方向を逆転づ゛る。When the magnitude of the detection signal of the fP2 signal is larger than the fP1 signal @a, if the signal detection means is moved in the outer circumferential direction in the same way as the position of E, the rack J-1 will increase to the information signal 1. They will be far apart, making it impossible to scan accurately. For this reason, 1
The index signal recorded at the recording switching position between the f P1 signal a and the f P2 signal @b for each rotation is used as follows. In FIG. 1, the signal detecting means at position E, after scanning accurately, comes to position D and detects the index signal j1. At this point, a switching signal is generated to reverse the radial control direction of the signal detection means.

即ち、Ｅの位置でｆ　Ｐ２信号すの大きさが［Ｅ）１信
号ａより大きければ、信号検出手段が情報信号のトラッ
クの中央よりも外周側にあると判断１ノ、信号検出手段
を内周側に移動させるのである。この様に、ドラッギン
グ誤差信号により信号検出手段の情報信号のトラックに
対する位置を検出する事が出来、まＩＣインデックス１
５号をイタ１せて利用する事により、信号検出手段が正
確に情報信号のトラックを安定して走査するように制御
出来る。That is, if the magnitude of the fP2 signal at position E is larger than the [E)1 signal a, it is determined that the signal detection means is located on the outer circumferential side of the track of the information signal, and the signal detection means is internally detected. It is moved to the circumferential side. In this way, the position of the information signal of the signal detection means relative to the track can be detected by the dragging error signal, and the position of the information signal of the signal detection means with respect to the track can be detected.
By using No. 5 at an angle of 1, it is possible to control the signal detection means to accurately and stably scan the track of the information signal.

ビデオディスク等の記録媒体に放て、第２Ｖの様に１回
転に、情報憤りとして映像信号等が、例えば４フイール
ドの情報量（即ち４個の垂直同期信号）が記録されてい
るものが有る。Ｇ１・−Ｇ４の位置に垂直同期信号が、
またＧ１の位置にインデックス信号が重畳されて記録さ
れているとする。When released on a recording medium such as a video disk, there are some in which a video signal, etc., for example, 4 fields of information (i.e., 4 vertical synchronization signals) is recorded in one rotation as in the second V. . The vertical synchronization signal is at the G1/-G4 position,
It is also assumed that an index signal is recorded in a superimposed manner at the position G1.

この様な記録媒体を、上記の様にトラッキング誤差信号
とインデックス信号とを利用して再生ゴることににす、
情報信号をもれなく全て検出する事が出来る。ところで
、ビデオディスクプレーヤ等の記録円盤再生装置に於て
、高速再生と呼ばれる楓能が有る。これは、例えば第２
図の太線部の信号検出手段の走査軌跡が示す様に、信号
検出手段を記録媒体の所定の位置で内周方向に強制的に
移動させ、断続的に情報信号を検出し、再生づるもので
ある。この機能を付加する事により、再４１］画面を見
ながら所望する部分を速（検索する事が出来、また連続
的に映像信号を全て再生ずる場合と異なり、順方向ある
いは逆方向の動きの早い再生画面を実現する小が出来、
趣向を＆）らず！ＪＹが出来る等の利点が有り、記録円
盤再生装置に高付加価値を与える事が出来る。We will reproduce such a recording medium using the tracking error signal and index signal as described above.
It is possible to detect all information signals without exception. By the way, in recording disc playback devices such as video disc players, there is a feature called high-speed playback. This is for example the second
As shown by the scanning locus of the signal detecting means in the bold line in the figure, the signal detecting means is forcibly moved in the inner circumferential direction at a predetermined position on the recording medium to intermittently detect and reproduce information signals. be. By adding this function, you can quickly search for a desired part while looking at the screen, and unlike the case where all the video signals are played back continuously, you can quickly move forward or backward. A small device that realizes the playback screen is created,
No preference &)! It has advantages such as being able to perform JY, and can add high added value to recording disc playback devices.

従来の代表的な高速再生機能を備えた記録円盤再生装置
について第３図を用いて説明する。１は信号検出手段２
が円盤状の記録媒体３１；り検出した信号から２つのト
ラッキング信号及びインデックス信号を抜き取る第１の
抜取口路、４は一方のトラッキング信号を抜き取る第２
の抜取回路、５は他方のトラッキング信号を抜き取る第
３の抜取回路、６はインデックス信号を扱き取る第４の
抜取回路、７はトラッキング誤差信号生成回路、８はト
ラッキング誤差信号と高速再生時に信の検出手段２を半
径方向に強制的に移動させるキック信号Ｃ及びダンピン
グ信号ｄとを加算Ｊ°る加算回路である。９はマイクロ
ブ１コレツサー等から成る制御手段で、インデックス信
号検出時あるいは信号検出手段２が隣接した情報信号の
トラックに移動した際、スイッチング信号ｅを発生させ
、またキック信号Ｃ及びダンピング信号−を発生させる
ものである。１０は信号検出手段２を半径方向に駆動さ
せる駆動回路である。A typical conventional recording disk reproducing apparatus having a high-speed reproducing function will be explained with reference to FIG. 1 is signal detection means 2
is a disk-shaped recording medium 31; 4 is a first extraction port path for extracting two tracking signals and an index signal from the detected signal; and 4 is a second extraction port path for extracting one tracking signal.
5 is a third sampling circuit that extracts the other tracking signal, 6 is a fourth sampling circuit that handles the index signal, 7 is a tracking error signal generating circuit, and 8 is a tracking error signal and a signal generating circuit during high-speed reproduction. This is an addition circuit that adds a kick signal C for forcibly moving the detection means 2 in the radial direction and a damping signal d. Reference numeral 9 denotes a control means consisting of a microb 1 collector, etc., which generates a switching signal e, and also generates a kick signal C and a damping signal - when an index signal is detected or when the signal detection means 2 moves to an adjacent information signal track. It is something that makes you 10 is a drive circuit that drives the signal detection means 2 in the radial direction.

この装置を用いた高速再生の原理は次の様である。第２
図に於て、所定の位置、例えば１垂直向期信号区間内で
２箇所の、Ｆ」１〜Ｈ８の位置で信号検出手段２を内周
方向に移動させるとする。従来の方式は、信号検出手段
２を移動さける場合、情報信号の１−ラックで１トラツ
クずつ、第２図の太線の様に移動させていた。マイクロ
ブロセツナー等から成る制御手段９は、記録媒体３の所
定の位置Ｈ１〜）」８に信号検出手段２が来ると同時に
、第４図に示す様な波形を持つキック信号Ｃ及びダンピ
ング信号ｄを時間的に連続に発生させ、信号検出手段２
を移動させる。このキック信号Ｃ及びダンピング信号ｄ
の時間幅τ及び信号の大きさ■１は、信号検出手段２が
情報信号のらようと１トラツク移動する様に股定してＪ
３＜。この様に、１垂直向期信号区間内で２回、１回転
内で８回ずつ、信号検出手段２を内周方向に移動さ１れ
ば、全く強制的に移動しない場合に比べ、（８−１−１
）１ｇの順方向の高速再生を行う事が出来る。またキッ
ク信号Ｃ及びダンピング信＠ｄの発生タイミングを逆に
すれば、（８−１）倍の逆方向の高速再生を行う事が出
来る。一般的にば、１垂直向期信丹区間内でｎ個の順方
向のキック信号Ｃ及びダンピング信号ｄを発生させれば
、（ｎ→−１）倍の順方向高速再生が、また逆方向の場
合は（ｎ−１）倍の高速再生を行う事が出来る。The principle of high-speed reproduction using this device is as follows. Second
In the figure, it is assumed that the signal detection means 2 is moved in the inner circumferential direction at predetermined positions, for example, two positions F'1 to H8 within one vertical synchronization signal section. In the conventional system, when the signal detection means 2 is to be moved, it is moved one track at a time for each rack of information signals, as shown by the bold line in FIG. At the same time as the signal detection means 2 comes to a predetermined position H1~)8 on the recording medium 3, the control means 9 consisting of a microbrosetner etc. detects a kick signal C and a damping signal having waveforms as shown in FIG. d continuously in time, and the signal detecting means 2
move. This kick signal C and damping signal d
The time width τ and the signal size 1 are determined so that the signal detection means 2 moves one track to follow the information signal.
3<. In this way, if the signal detecting means 2 is moved in the inner circumferential direction twice in one vertical timing signal section and eight times in one rotation, the signal detecting means 2 is moved in the inner circumferential direction (8 times) compared to the case where it is not forced to move at all. -1-1
) 1g forward high-speed playback is possible. Furthermore, by reversing the timing of generation of the kick signal C and the damping signal @d, high-speed reproduction in the reverse direction can be performed (8-1) times. Generally speaking, if n forward direction kick signals C and damping signals d are generated within one vertical direction interval, forward direction high-speed reproduction is (n → -1) times, and reverse direction In this case, it is possible to perform reproduction at a speed (n-1) times higher.

しかしながらこのような従来装置では、次のにうな問題
があった。第１に、キック信号Ｃとダンピング信号ｄと
を、情報信号のトラック間移動時の条件が異なるにも関
わらず一定条件で発生させている点である。このため、
記録媒体３のＬ！！Ｉ造土のバラツキによる各情報信号
のトラック間の幅のバラツキ、あるいは信号検出手段２
の駆動（ｉ　号ｆに対する応答感度のバラツキ等により
、キック信号Ｏの発生俊、信号検出手段２が隣接した情
報信号の１へラックに到達する以前に、又は隣接の情報
信号の１〜ラツクを大幅に越えた時点で、ダンピング信
号ｄが発生する場合が有り、所望のトラックに信号検出
手段２を移動させる事が出来ない揚台が有る。第２の問
題点は、信号検出手段２を移動させるトラック数が１ト
ラツクＪ“つであるため、信号検出手段２が１トラツク
移動し終えたと同時に、第４図に示す様にスイッチング
信号ｅを発生させる必要がある点である。このため、制
御手段９のプログラムあるいは回路等が複雑になる。第
３の問題点は、信号検出手段２を移動させる際、第２図
の例えば１．Ｊの区間で情報信号（映像信号）以外の信
号を検出するため、再生画面上で２箇所のノイズが発生
し、再生画面の品位を低下させる事である。このノイズ
の数は１垂直向期信号区間内に信号検出手段２を移動さ
せる数と同数である。However, such conventional devices have the following problems. First, the kick signal C and the damping signal d are generated under constant conditions even though the conditions when the information signal is moved between tracks are different. For this reason,
Recording medium 3 L! ! I Variations in the width between tracks of each information signal due to variations in soil construction, or signal detection means 2
drive (i) Due to variations in response sensitivity to number f, etc., the kick signal O may be generated before the signal detection means 2 reaches the rack of the adjacent information signal 1 or the rack of the adjacent information signal 1. A damping signal d may be generated when the signal detection means 2 is significantly exceeded, and there is a platform where the signal detection means 2 cannot be moved to the desired track.The second problem is that the signal detection means 2 cannot be moved to the desired track. Since the number of tracks to be moved is 1 track J'', it is necessary to generate the switching signal e as shown in FIG. 4 at the same time as the signal detection means 2 finishes moving one track. The program or circuit of the means 9 becomes complicated.The third problem is that when the signal detecting means 2 is moved, a signal other than the information signal (video signal) is detected in the section 1.J in FIG. Therefore, noise occurs in two places on the playback screen, deteriorating the quality of the playback screen.The number of noises is the same as the number of times the signal detection means 2 is moved within one vertical synchronization signal section. be.

発明の目的 本発明は上記従来の欠点を解消するもので、高速再生時
に於て、信号検出手段をキック信号及びダンピング信号
を用いて移動さＵる際に、記録媒体上の情報信号のトラ
ック間の幅のバラツキや信号検出手段の駆動信号に対す
る応答感度のパラソキの影響を受ける事をなくすことが
でき、また信号検出手段をキック信号及びダンピング信
号を用いて移動させる際、インデックス信号の位置以外
ではスイッチング信号を発生させる必要をなくすことか
でき、さらには信号検出手段が情報信号のトラック間を
移動する時に発生する再生画面上のノイズの数を低減で
きる記録円盤再生装置を提供することを目的とする。OBJECTS OF THE INVENTION The present invention solves the above-mentioned drawbacks of the conventional art.During high-speed reproduction, when the signal detection means is moved using a kick signal and a damping signal, the information signal on the recording medium is detected between tracks. It is possible to eliminate the effects of variations in the width of the signal detection means and variations in the response sensitivity of the signal detection means to the drive signal, and when moving the signal detection means using the kick signal and damping signal, it is possible to eliminate the influence of variations in the width of the It is an object of the present invention to provide a recording disk reproducing device that can eliminate the need to generate a switching signal and further reduce the number of noises on the reproducing screen that occur when a signal detecting means moves between tracks of an information signal. do.

発明の構成 上記目的を達成するため、本発明の記録円盤再生装置は
、円盤状の記録媒体に螺旋状に記録された情報信号を検
出する信号検出手段と、前記情報信号のトラックの両側
に１回転毎に交互に記録された２種類のトラッキング信
号の大ぎさの差信号であるトラッキング誤差信号を用い
て前記信号検出手段を記録媒体半径方向に制御して前記
情報信号のトラックを正確に走査せるトラッキング制御
手段と、前記記録媒体に記録されたインデックス信号の
記録位置または前記信号検出手段が隣接した情報信号の
トラックに強制的に移動させられた位置で前記信号検出
手段に対する記録媒体？１′径１ノ向の制御方向を反転
させるためのスイッチング信号を発生するスイッチング
信号生成手段と、１）ｈ記信号検出手段を記録媒体半径
方向に強制的に移動ｕしめるためのキック信号及びこの
キック信号により移動中の前記信号検出手段の動きに制
動を施ずためのダンピング信号を発生するキック信号及
びダンピング信号生成手段と、前記キック信号により前
記信号検出手段が記録媒体半径方向に通過した前記情報
信号のトラック数を計数する計数手段とを備え、前記キ
ック信号により前記信号検出手段を移動させ、前記キッ
ク信号の発生と同時に前記トラッキング誤差信号を用い
て前記信号検出手段が記録媒体半径方向に移動した前記
情報信号のトラック数の計数を開始し、所望のトラック
数だけ計数し終えた時点で前記ダンピング信号を発生さ
せることにより、前記信号検出手段を前記情報信号の２
Ｎ　（Ｎは正の整数）１−ラック分だ（プ移動させる構
成としたものである。Structure of the Invention In order to achieve the above-mentioned object, the recording disk reproducing apparatus of the present invention includes a signal detecting means for detecting an information signal recorded in a spiral shape on a disk-shaped recording medium, and a signal detecting means for detecting an information signal recorded in a spiral shape on a disk-shaped recording medium; The signal detecting means is controlled in the radial direction of the recording medium using a tracking error signal which is a difference signal in magnitude between two types of tracking signals recorded alternately every rotation to accurately scan the track of the information signal. Tracking control means and a recording medium for the signal detection means at a recording position of an index signal recorded on the recording medium or at a position where the signal detection means is forcibly moved to an adjacent information signal track? 1) a switching signal generating means for generating a switching signal for reversing the control direction in the radial direction of 1'; 1) a kick signal for forcibly moving the signal detecting means h in the radial direction of the recording medium; kick signal and damping signal generating means for generating a damping signal for not braking the movement of the signal detecting means during movement in response to the kick signal; counting means for counting the number of tracks of an information signal, the signal detecting means is moved by the kick signal, and the tracking error signal is used to cause the signal detecting means to move in the radial direction of the recording medium at the same time as the kick signal is generated. By starting counting the number of tracks of the information signal that has moved and generating the damping signal when the desired number of tracks has been counted, the signal detecting means is activated to detect the number of tracks of the information signal.
N (N is a positive integer) 1-1 racks (N is a positive integer).

実施例の説明 以下、本発明の一実施例について、図面に基づいて説明
する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

第５図は本発明の一実施例における記録円盤再生装置の
回路ブロック図で、第３図に示す構成要素と同一の１ｍ
構成要素同一の符号を付してその説明を省略する。１１
はマイクロプロセッサ−等から成る制Ｃ１１手段で、信
号検出手段２を強制的に移動させる際、キック信号Ｃの
発生と同時に、１〜ラツギング誤誤差骨ｇにより信号検
出一手段２が通過した情報信号のトラック数を計数し、
所望の２Ｎ個（Ｎは正の整数）の１−ラック数を計数し
終えると同時に、ダンピング信号ｄを発生させる。この
時、インデックス信号の位置以外では、スイッチング信
号ｅの発生を行なわない。すなわち第３図の従来例と比
べて、信号検出手段２が所望のトラック数だけ確実に移
動する様、トラッキング誤差信号９を利用し、通過した
情報信号のトラック数を計数している点に特徴がある。FIG. 5 is a circuit block diagram of a recording disk reproducing apparatus according to an embodiment of the present invention.
Components are given the same reference numerals and their explanations are omitted. 11
is a control means C11 consisting of a microprocessor, etc., and when the signal detection means 2 is forcibly moved, at the same time as the kick signal C is generated, the information signal passed by the signal detection means 2 due to 1 to lagging error bone g is detected. Count the number of tracks,
At the same time as the desired 2N (N is a positive integer) 1-rack number is counted, a damping signal d is generated. At this time, the switching signal e is not generated at a position other than the position of the index signal. That is, compared to the conventional example shown in FIG. 3, the present invention is characterized in that the tracking error signal 9 is used to count the number of tracks of the information signal that has passed so that the signal detection means 2 moves reliably by the desired number of tracks. There is.

次に高速再生の動作について説明する。第６図に示す様
に、信号検出手段２を２Ｎ＜本実施例ではＮ＝１）ｌ−
ラックずつ移動させる。第６図に於て、各垂直同期信号
区間内のｌ−ｈ　、　１−１３　、　Ｈ５。Next, the operation of high-speed playback will be explained. As shown in FIG. 6, the signal detecting means 2 is set to
Move racks one by one. In FIG. 6, l-h, 1-13, H5 within each vertical synchronization signal section.

Ｈ７の位置で信号検出手段２を移動させるとする。Suppose that the signal detection means 2 is moved at the position H7.

太線は信号検出手段２の軌跡、実線Ａは情報信号の１〜
ラツク、一点鎖線Ｂ一方のトラッキング信号（ｆ　Ｐ１
信号）、二点鎖線Ｃは他方のトラッキング信号（ｆ　Ｐ
２信号）を示す。今、信号検出手段２が、第６図に於て
Ｋの位置にあるどする。信号検出手段２が正確に情報信
号のトラックの中央を走査しておれば、２つのトラッキ
ング信号の大きさの差信号はほぼ零、即ち１−ラッキン
グ誤差信号９のレベルはほぼ零となる。第７図に示すト
ラッキング誤差信８ｇに於て、基準レベルはトラッキン
グ誤差信号９のレベルが零の状態、正の領域はｆ　Ｐ１
信号の大ぎさがｆＰ２信号よりも大ぎい状態、即ち信号
検出手段２が情報信号のトラックの中央よりもｆ　Ｐｔ
信号の記録された側へ奇っている状態、また負の領域は
逆の状態を表わす。次に第７図に於て、ギック信＠Ｃを
等制御手段１１Ｊ：り発生させ、信号検出手段２を内周
方向に移動さぜる。この時、トラッキング誤差信号０は
、信号検出手段２が内周方向に移動し始めると同時に変
化する。即らＫの位置からしの位置に移るにつれて、ト
ラッキング誤差信号９は負の領域になり、Ｌの位置で負
の最大値となる。更にＬの位置を越え、Ｍの位置、つま
り隣接の情報信号のトラックに近づくと、ドラッギング
誤差信号ｇは負の値を減少し始め、Ｍの位置で基準レベ
ルとなる。この時点で制御手段１１内の情報信号のトラ
ック通過数の加算器に１を加える。更に信号検出手段２
が移動してＰの位置、即ち２つ離れた情報信号の１〜ラ
ツクに達すると、第７図の様に、トラッキング誤差信号
は逆の極性を示しながら、再び基準レベルとなる。ここ
で制御手段１１内の情報信号のトラック通過数の加算器
に１を加え、加算器の内容を２とする。本実施例では２
トラツクずつ信号検出手段２を移動さぜる場合であるた
め、加算器の内容が２となったと同時に、ダンピング信
号ｄ＠発生させ、信号検出手段２の動きに制動をかりる
。ここで加算器の内容を零にリセットする。この様にト
ラッキング誤差信号９が、キック信＠Ｃ発生後、何回基
準レベルを通過したかを計数する事により、信号検出手
段２が何回情報伯母のトラックを通過したか検出する事
が出来る。また、２Ｎトラツクずつ信号検出手段２を移
動させる場合は、移動した前後でｆ　Ｐ１１倍とｆ　Ｐ
２２倍とに対する位置関係は同じであるため、スイッチ
ング信号Ｃを発生する必要はない。インデックス信号の
位■でのみ発生させればよいのである。また本実施例で
はＮ−１の場合（２トラツクずつ移動）であったため、
制御手段１１内の加算器が（２ｘ　Ｎ　＝　２　ｘ　１
　＝＝　２　）となった瞬間に、ダンピング信号ｄを発
生させたが、一般的には、Ｎ＝Ｘの場合は、加算器の内
容が２×となればダンピング信号ｄを発生ずる様に設定
すれば良い。また本実施例とは逆に、信号検出手段２を
外周方向に移動させる場合は、キック信号Ｃ及びダンピ
ング化＠ｄの各々の極性を逆にすれば良い。なお、制御
手段１１内の加算器は、マイクロプロセッザー等のプロ
グラムあるいは制御回路のカウンター等で対応が可能で
ある。またキック信８Ｃ及びダンピング信号ｄの時間幅
ならびに信号の大きさは、従来例に準じ、信号検出手段
２が駆動（ｇ号５に対して滑らかに動作する様に設定す
ればよい。The thick line is the trajectory of the signal detection means 2, and the solid line A is the trajectory of the information signal 1~
One tracking signal (f P1
signal), and the chain double-dashed line C represents the other tracking signal (f P
2 signals). Suppose now that the signal detection means 2 is at position K in FIG. If the signal detection means 2 accurately scans the center of the track of the information signal, the difference signal between the magnitudes of the two tracking signals will be approximately zero, that is, the level of the 1-racking error signal 9 will be approximately zero. In the tracking error signal 8g shown in FIG. 7, the reference level is the state where the level of the tracking error signal 9 is zero, and the positive region is f P1
A state in which the magnitude of the signal is greater than the fP2 signal, that is, the signal detecting means 2 is in a state where the magnitude of the signal is greater than f Pt than the center of the track of the information signal.
A state where the signal is shifted toward the recorded side, and a negative region represents the opposite state. Next, in FIG. 7, a signal @C is generated by the control means 11J, and the signal detection means 2 is moved in the inner circumferential direction. At this time, the tracking error signal 0 changes at the same time as the signal detection means 2 starts moving in the inner circumferential direction. That is, as the tracking error signal 9 moves from the K position to the L position, the tracking error signal 9 becomes a negative region, and reaches its maximum negative value at the L position. Further beyond the L position and approaching the M position, that is, the track of the adjacent information signal, the dragging error signal g begins to decrease in negative value and reaches the reference level at the M position. At this point, 1 is added to the adder for the number of track passages of the information signal in the control means 11. Furthermore, the signal detection means 2
When the tracking error signal moves and reaches the position P, that is, the 1st to 0th position of the information signal two positions apart, the tracking error signal returns to the reference level again, showing the opposite polarity, as shown in FIG. Here, 1 is added to the adder for the number of track passages of the information signal in the control means 11, and the content of the adder is set to 2. In this example, 2
Since this is a case where the signal detection means 2 is moved track by track, the damping signal d@ is generated at the same time as the content of the adder becomes 2, and the movement of the signal detection means 2 is damped. Here, the contents of the adder are reset to zero. In this way, by counting how many times the tracking error signal 9 passes the reference level after the kick signal @C occurs, it is possible to detect how many times the signal detection means 2 passes the information aunt's track. . In addition, when the signal detection means 2 is moved by 2N tracks, f P11 times and f P before and after the movement.
Since the positional relationship with respect to 22 times is the same, there is no need to generate the switching signal C. It is sufficient to generate it only at the position (■) of the index signal. Also, in this example, since the case is N-1 (moves 2 tracks at a time),
The adder in the control means 11 is (2x N = 2 x 1
== 2), the damping signal d was generated, but in general, when N=X, the damping signal d is generated when the content of the adder becomes 2×. Just do it. Further, contrary to this embodiment, when the signal detection means 2 is moved in the outer circumferential direction, the polarity of each of the kick signal C and the damping @d may be reversed. Note that the adder in the control means 11 can be handled by a program such as a microprocessor or a counter of a control circuit. Further, the time width and signal magnitude of the kick signal 8C and the damping signal d may be set so that the signal detection means 2 operates smoothly with respect to the drive (g 5) according to the conventional example.

なお、マイクロプロレッサー等からなる制御手段１１に
よる、２Ｎｌ−ラックだけ信号検出手段２を移動さぜる
ための、キック信＠Ｃ及びダンピング化＠ｄならびにス
イッチング信号Ｃの発生動作のフローヂャー１〜を第８
図に示ず。In addition, the flowchart 1~ of the generation operation of the kick signal @C, the damping @d, and the switching signal C for moving the signal detection means 2 by 2Nl-rack by the control means 11 consisting of a micro processor etc. 8th
Not shown.

発明の詳細 な説明したように本発明ににれば、トラッキング誤差信
号を用いて、キック信号発生後の信号検出手段の位置を
検出しながら、ダンピング信号発生のタイミングを決定
しているため、記録媒体の製造」：のバラツキによる情
報信号のトラック間の幅のバラツギ、あるいは信号検出
手段の駆動信号に対する応答感度のバラツキの影響を受
ける事な（、信号検出手段の動きに制動を施す事が出来
る５、また２ＮＩ−ラックずつ信号検出手段を移動させ
るため、移動時にスイッチング信号を発生させる必要が
なく、その分、制御手段のプログラムあるいは回路構成
が簡略化できる。さらには、高速再生時、従来例に比べ
、再生画面上のノイズの数を大幅に低減出来る。例えば
、１回転毎に４回（各垂直同期伯母区間内に１回ずつ）
信号検出手段を移動さＩＬる事により、移動させない場
合に比べて（２ｘ４＋１＝９＞倍の高速再生を実現出来
る。この時、再生画面上に表われるノイズの数は１本で
ある。これは、従来例で９倍の高速再生を実現した時の
２本に比べ、半分となっており、従来より再生画面の品
位を向」−させる事が出来°る。As described in detail, according to the present invention, the timing of damping signal generation is determined while detecting the position of the signal detection means after the kick signal is generated using the tracking error signal. The movement of the signal detecting means can be damped without being affected by variations in the width of the information signal between tracks due to variations in the manufacturing of the medium, or variations in the response sensitivity of the signal detecting means to the drive signal. 5. Also, since the signal detection means is moved in units of 2 NI-racks, there is no need to generate a switching signal during movement, and the program or circuit configuration of the control means can be simplified accordingly.Furthermore, during high-speed playback, the conventional example Compared to , the number of noises on the playback screen can be significantly reduced.For example, 4 times per rotation (once in each vertical synchronization interval)
By moving the signal detection means, it is possible to achieve playback that is (2x4+1=9> times faster than when it is not moved.At this time, the number of noises that appears on the playback screen is one.This is Compared to the conventional example, which achieves 9 times faster playback, the number of lines is half that, making it possible to improve the quality of the playback screen compared to the conventional example.

【図面の簡単な説明】[Brief explanation of drawings]

第１図はトラッキング信号とインデックス信号とを利用
して信号検出手段が正確に情報信号のトラックを走査す
る説明図、第２図は従来の高速再生時の信号検出手段の
走査軌跡の説明図、第３図は従来の記録円盤再生装置の
回路ブロック図、第４図は第３図に示す回路の各部信号
波形図、第５図は本発明の一実施例における記録円盤再
生装置の回路ブロック図、第６図は同記録円盤再生装置
におりる高速再生時の信号検出手段の走査軌跡の説明図
、第７図は第５図に示す回路の各部信号波形図、第８図
は制御手段の動作のフローチ１１−トである。 １・・・第１の抜取回路、２・・・信号検出手段、３・
・・記録媒体、４・・・第２の抜取回路、５・・・第３
の抜取回路、６・・・第４の抜取回路、７・・・トラッ
キング誤差信号生成回路、８・・・加算回路、１０・・
・駆動回路、１１・・・制御手段 代ｌ！１！大　　　森　　本　　義　　弘第１図 第２図 Ｃ６ 第１図 す。FIG. 1 is an explanatory diagram of how the signal detecting means accurately scans a track of an information signal using a tracking signal and an index signal, and FIG. 2 is an explanatory diagram of the scanning locus of the signal detecting means during conventional high-speed reproduction. FIG. 3 is a circuit block diagram of a conventional recording disk reproducing apparatus, FIG. 4 is a signal waveform diagram of each part of the circuit shown in FIG. 3, and FIG. 5 is a circuit block diagram of a recording disk reproducing apparatus according to an embodiment of the present invention. , FIG. 6 is an explanatory diagram of the scanning locus of the signal detecting means during high-speed reproduction in the recording disk reproducing apparatus, FIG. 7 is a signal waveform diagram of each part of the circuit shown in FIG. 5, and FIG. 8 is a diagram of the control means. This is a flowchart 11 of the operation. DESCRIPTION OF SYMBOLS 1... First extraction circuit, 2... Signal detection means, 3...
...Recording medium, 4...Second sampling circuit, 5...Third
sampling circuit, 6... fourth sampling circuit, 7... tracking error signal generation circuit, 8... addition circuit, 10...
・Drive circuit, 11... Control means fee l! 1! Yoshihiro OmorimotoFigure 1Figure 2C6 Figure 1.

Claims (1)

【特許請求の範囲】[Claims] １、円盤状の記録媒体に螺旋状に記録された情報信号を
検出する信号検出手段と、前記情報信号のトラックの両
側に１回転毎に交互に記録された２種類のトラッキング
信号の大きさの差信号であるトラッキング誤差信号を用
いて前記信号検出手段を記録媒体半径方向に制御して前
記情報信号のトラックを正確に走査させるトラッキング
制御手段と、前記記録媒体に記録されたインデックス信
号の記録位置または前記信号検出手段が隣接した情報信
号のトラックに強制的に移動させられた位置で前記信号
検出手段に対する記録媒体半径方向の制御方向を反転さ
せるためのスイッチング信号を発生するスイッチング信
号生成手段と、前記信号検出手段を記録媒体半径方向に
強制的に移動せしめるためのキック信号及びこのキック
信号により移動中の前記信号検出手段の動きに制動を施
すためのダンピング信号を発生するキック信号及びダン
ピング信号生成手段と、前記キック信号により前記信号
検出手段が記録媒体半径方向に通過した前記情報信号の
トラック数を計数する計数手段とを備え、前記キック信
号により前記信号検出手段を移動させ、前記キック信号
の発生と同時に前記トラッキング誤差信号を用いて前記
信号検出手段が記録媒体半径方向に移動した前記情報信
号のトラック数の計数を開始し、所望のトラック数だけ
計数し終えた時点で前記ダンピング信号を発生させるこ
とにより、前記信号検出手段を前記情報信号の２Ｎ（Ｎ
は正の整数）トラック分だけ移動させる構成とした記録
円盤再生装置。1. A signal detecting means for detecting an information signal recorded in a spiral shape on a disk-shaped recording medium, and a signal detecting means for detecting an information signal recorded in a spiral shape on a disk-shaped recording medium, and a signal detecting means for detecting the magnitude of two types of tracking signals recorded alternately every rotation on both sides of the track of the information signal. tracking control means for accurately scanning the track of the information signal by controlling the signal detection means in the radial direction of the recording medium using a tracking error signal that is a difference signal; and a recording position of the index signal recorded on the recording medium. or switching signal generating means for generating a switching signal for reversing the control direction of the recording medium radial direction for the signal detecting means at a position where the signal detecting means is forcibly moved to an adjacent information signal track; Kick signal and damping signal generation for generating a kick signal for forcibly moving the signal detecting means in the radial direction of the recording medium and a damping signal for applying braking to the movement of the moving signal detecting means using the kick signal. and counting means for counting the number of tracks of the information signal that the signal detection means has passed in the radial direction of the recording medium in response to the kick signal, the signal detection means is moved in response to the kick signal, At the same time as the tracking error signal is generated, the signal detecting means starts counting the number of tracks of the information signal that has moved in the radial direction of the recording medium, and when the desired number of tracks has been counted, the damping signal is generated. By causing the signal detecting means to detect 2N (N
is a positive integer) A recording disc playback device configured to move by the number of tracks.