JPS59146481A - Time axis control system - Google Patents

Time axis control system

Info

Publication number
JPS59146481A
JPS59146481A JP2049683A JP2049683A JPS59146481A JP S59146481 A JPS59146481 A JP S59146481A JP 2049683 A JP2049683 A JP 2049683A JP 2049683 A JP2049683 A JP 2049683A JP S59146481 A JPS59146481 A JP S59146481A
Authority
JP
Japan
Prior art keywords
output
phase
adjustment means
time axis
signal
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.)
Granted
Application number
JP2049683A
Other languages
Japanese (ja)
Other versions
JPH0514353B2 (en
Inventor
Takashi Okano
岡野 高
Toru Akiyama
徹 秋山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Corp
Original Assignee
Pioneer Corp
Pioneer Electronic Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pioneer Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP2049683A priority Critical patent/JPS59146481A/en
Publication of JPS59146481A publication Critical patent/JPS59146481A/en
Publication of JPH0514353B2 publication Critical patent/JPH0514353B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/081Disposition or mounting of heads or light sources relatively to record carriers for time base error correction by moving the light beam

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Feedback Control In General (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE:To lock the phase quickly to the prescribed phase of a reference signal and to ensure the stable action by using the output of a common phase error detecting means which produces an error signal corresponding to the phase difference of both signals to drive the course and fine adjusting means. CONSTITUTION:A spindle servo system includes a phase error detector PD1 having a wide dynamic range and low detecting sensitivity, a switch 11 which selects the output of the PD1 and the output of a servo amplifier 7 of a tangential servo system, and amplifiers 8 and 9 which amplify the error signal selected by the switch 11. The revolution of a spindle motor is controlled by a drive amplifier 9 at the final stage. The tangential servo system contains a PD2 which has a narrow dynamic range and a high level of detecting sensitivity. The error output produced by the PD2 is supplied to the amplifier 7 via a buffer 4 and a loop switch 6. The output of the amplifier 7 is supplied to a drive amplifier 10 via a DC cutting capacitor C2 and turned into a tangential mirror driving signal.

Description

【発明の詳細な説明】 この発明は時間軸制御方式に関し、特に記録情報再生装
置における再生信号の時間軸制御方式に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a time axis control system, and more particularly to a time axis control system for a reproduced signal in a recorded information reproducing apparatus.

再生信号の時間軸補正をなすだめの時間軸制御装置のブ
ロック図が第1図に示されておシ、粗調制御系たるスピ
ンドルサーボ系を微調制御系たるタンゼンシャルサーボ
系とが設けられている。基準信号と再生水平同期信号と
の位相誤差が2つの位相誤差検出器(以下単にPDと略
記する)1及び2において検出される。PDIの出力は
加算器3の1人力となっておp、’1cPD2の出力は
ノ4ツファアンプ4.直流阻止回路5.ループスイッチ
6及びサーボアンプ7を介して当該加算器3の個入力と
なっている0直流阻止回路5はコンデンサCIと抵抗R
□とからなシ、そのカットオフ周波数は略0.2 Hz
位の超低域周波□数に選定されてい乞。加算器36宣出
力はサーボアンプ8及びドライブアンプ。
A block diagram of a time axis control device for correcting the time axis of the reproduced signal is shown in Fig. 1, in which a spindle servo system as a coarse adjustment control system and a tangential servo system as a fine adjustment control system are provided. ing. A phase error between the reference signal and the reproduced horizontal synchronizing signal is detected by two phase error detectors (hereinafter simply abbreviated as PD) 1 and 2. The output of PDI is outputted by adder 3, and the output of PD2 is outputted by amplifier 4. DC blocking circuit 5. The zero DC blocking circuit 5, which is input to the adder 3 via the loop switch 6 and the servo amplifier 7, has a capacitor CI and a resistor R.
□Tokaranashi, its cutoff frequency is approximately 0.2 Hz
It has been selected for the ultra-low frequency □ number. Adder 36 output is servo amplifier 8 and drive amplifier.

9を介して記録ディスク回転駆動用のスピンドルモータ
を駆動する。4殖サーボアングアの出力はドライブアン
プ10を介してタンゼンシャルミラーを駆動する。この
夕/ゼンシャ)レミラーの回動によシ、情報検出用の光
スポットが記録トラック接線方向に偏倚されるようにな
って・いる。
A spindle motor for driving the rotation of the recording disk is driven via 9. The output of the quadruple servo amplifier drives a tangential mirror via a drive amplifier 10. Due to this rotation of the mirror, the light spot for information detection is biased in the tangential direction of the recording track.

PDIはいわゆる位相検波器構成であって、両人カイ3
号パルスの乗算(う°ロダク□ト)をなしこの乗算信号
の直流成分を発生するようになっている。
PDI is a so-called phase detector configuration,
The signal pulse is multiplied (roducted) and the DC component of this multiplied signal is generated.

一方、PD2は、基i言号に同期した鋸歯状波信号を再
生同期イ譬号に旨期したサンプルパルスによりサンプル
ホールド;する回路構成である。従って、PD 1はp
D 2(C比し夕゛イナミックレンジ(誤差検出範囲)
が大であるが、検出感度は劣る特性を有する。
On the other hand, PD2 has a circuit configuration that samples and holds a sawtooth wave signal synchronized with the basic i word using a sample pulse intended for reproduction synchronization. Therefore, PD 1 is p
D 2 (compared to C) dynamic range (error detection range)
However, the detection sensitivity is inferior.

従って、先ずダイナミックレンジは広いが検出感度が劣
るPDIの出力によりスピンドルモータが駆動されて時
間軸の粗調整が行わ、れる(スイッチ6は芽−プンであ
る)。これによってスピンドル冬−一のロックが略完了
すると、スイッチ6がオンとなpJ高精度のPD2の出
力によってタンゼ、/シャルミラーが駆動されて、スピ
ン、ドルサーボ系によっては除きえない残留誤差成分が
除去されるようにkる。この残留誤差成分は、記録トラ
ックの偏心に起因するものでNTSC方式のCAV(角
速度一定)記録ディスクの場合には30 H22分が主
体である。
Therefore, first, the spindle motor is driven by the output of the PDI, which has a wide dynamic range but poor detection sensitivity, and coarse adjustment of the time axis is performed (switch 6 is inactive). When the locking of the spindle winter-1 is almost completed, the switch 6 is turned on and the tanze and /shall mirrors are driven by the output of the pJ high-precision PD2, and residual error components that cannot be removed by the spin and dollar servo systems are removed. k to be removed. This residual error component is caused by the eccentricity of the recording track, and in the case of an NTSC system CAV (constant angular velocity) recording disk, the residual error component is mainly 30 H22 minutes.

この時、スピンドルサーボ系にPDIによるエラー信号
の他にサーボアンプ7の出力が重畳されているのは、タ
ンゼンシャルサニボ系に現わ、れる超低域成分(直流に
近い)をスピンドルサーボ系へ印加して、この成分をス
ピンドルサーボ系のサーボ動作により除くようにするた
めのものである。
At this time, the output of the servo amplifier 7 is superimposed on the spindle servo system in addition to the PDI error signal. This component is applied to the system and removed by the servo operation of the spindle servo system.

更に詳述すべく、サーボアンプ7の出力をスピンドルサ
ーボ系へ供給せずに、タンゼンシャル丈−ボ系とスピン
ドルサーボ系とを互いに独立のサーボループとしかつコ
ンデンサC1ヲなくしてクンゼ/シャル丈−ボ系を直結
とした場合金力える。
To be more specific, the output of the servo amplifier 7 is not supplied to the spindle servo system, the tangential length-voice system and the spindle servo system are made into mutually independent servo loops, and the capacitor C1 is eliminated to create a Kunze/shall length-void system. If the system is directly connected, it will be more expensive.

この場合には、再生信号の位相ロックは行われるがタン
ゼンシャルサーボ系に介在する直流成分が除去できずに
ミラーがその中立点から当該直流成分に対応した角度だ
け傾いてロックすることになる。これでは、クンゼンシ
ャルミラー駆動用のアクチ゛1−タ(一般VC?%°1
ル)4直流が流れて損失が大となpまた、ミラーは所定
角度傾いた。位置を中心に揺動するから揺動限界角をオ
ーバーする危険がある。そこで、直流分を除くべく弔1
図に示すようにタンゼンシャルサーボ系のエラーヲスピ
ンドルザーボ系へ印加するようにしているのである。
In this case, the phase of the reproduced signal is locked, but the DC component present in the tangential servo system cannot be removed, and the mirror is tilted and locked at an angle corresponding to the DC component from its neutral point. . In this case, the actuator for driving the Kunsential mirror (general VC?%°1
(l) 4 Direct current flows and the loss is large. Also, the mirror is tilted at a predetermined angle. Since it swings around the position, there is a risk of exceeding the swing limit angle. Therefore, in order to remove the DC component,
As shown in the figure, errors in the tangential servo system are applied to the spindle servo system.

ここで、超低域をカットオフ周波数とする回路5をタン
ゼンシャルサーボ系に挿入して直結としない理由は、直
結にすれば両ザーボ系のD(4分が互いに重畳されて位
想誤差に正確に対応したDCエラーが得られなくなるか
ら、当該回路5を挿入してこれを防止しているのである
Here, the reason why the circuit 5 whose cutoff frequency is the ultra-low range is not inserted into the tangential servo system and connected directly is that if it were directly connected, the D(4) of both servo systems would be superimposed on each other, causing a positional error. Therefore, the circuit 5 is inserted to prevent this from occurring.

かかる第1図の構成において、スピンドルサーボ系がロ
ックしてループスイッチ6がオ・ンす為時点(to)を
境にした場合のタンゼン、シャルサーボ系のエラー波形
が第2図に示されている。図示の如く時刻t。直前はタ
ンゼンシャルサーボ系がオープンであるからスピンドル
サーボ系では除去し得ない残留誤差成分(30Hz )
が残存している。時刻toで:スイッチ、6がオンとな
ると、囚の場合にはその瞬間エラー振幅は小でβるから
速やかにタンゼンシャルミラーはその、中立点(安定点
)・へ向かいロックすることになる。しかし、(B)の
場合にはエラー振幅が大なる時に・スイッチ6がオンと
なるから、回路5の大きな時定数によpタンゼンシャル
サーボ系は安定点へ収束するまで長い時間を要すること
Kなる。
In the configuration shown in FIG. 1, the spindle servo system is locked and the loop switch 6 is turned on, so the error waveforms of the Tanzen and Schall servo systems are shown in FIG. 2 when the time point (to) is reached. There is. As shown in the figure, at time t. Immediately before, the tangential servo system is open, so there is a residual error component (30Hz) that cannot be removed by the spindle servo system.
remains. At time to: When switch 6 is turned on, in the case of a prisoner, the instantaneous error amplitude is small and β, so the tangential mirror immediately moves to its neutral point (stable point) and locks. . However, in case (B), switch 6 is turned on when the error amplitude becomes large, so it takes a long time for the p-tangential servo system to converge to a stable point due to the large time constant of circuit 5. K becomes.

この期□間炉おいては、クンゼンシャルサーボの働きに
よシ残留誤差成分(30Hz ’)は十分に除去されて
いるが、次第に減少する準備信号に対する直流的な位相
ずれが生じている。この直流的な位相ずれは、高い周波
数を有するカラービデオ信号に対して外乱とはならず、
更に直流的な位相ずれの漸減はモニタ内のAFC<自動
周波数制御)回路により除去される。従って、単一の記
録情報再生装置の画像出力をモニタ上で再生する場合、
何等支障はない。しかし、複数の再生装置出力を同一モ
ニタ上で画像合成する場合には、外部同動□信号によシ
複数の再生装量の出力位相を合致させて使用する必要が
あるところ、タンゼンシャル丈−ボループオン時の過渡
時にサーボルーズが安定点に達するまでに上述のように
長時間ケ要するとこの期間の直流的な位相ずれがモニタ
上の画像すれとなって現われることになシ好ましくない
ことになる。
In this period □ period reactor, the residual error component (30 Hz') is sufficiently removed by the action of the Kunsential servo, but a DC phase shift occurs with respect to the gradually decreasing preparation signal. This direct current phase shift does not cause any disturbance to the high frequency color video signal;
Furthermore, the gradual decrease in DC phase shift is eliminated by an AFC (automatic frequency control) circuit within the monitor. Therefore, when reproducing the image output of a single recorded information reproducing device on a monitor,
There are no problems. However, when combining the outputs of multiple playback devices on the same monitor, it is necessary to match the output phases of the multiple playback devices using an external synchronized signal. If it takes a long time as described above for the servo loose to reach a stable point during a time transition, the DC phase shift during this period will appear as image blurring on the monitor, which is undesirable.

本発明の目的は基準信号における所定位相に対し速やか
に位相ロックして安定な動作をなすようにした再生信号
の時間軸制御方式を提供することである。
SUMMARY OF THE INVENTION An object of the present invention is to provide a time axis control system for a reproduced signal that quickly locks the phase to a predetermined phase of a reference signal and achieves stable operation.

本発明による時間軸制御方式は、再生信号の位相と所定
基準信号の位相とが略同期している期間は、これら両信
号の位相差に応じたエラー信号を発生する共通の位相誤
差検出手段の出力を用いて粗調手段及び微調手段を駆動
するようにしたことを特徴とする。
In the time axis control method according to the present invention, during a period when the phase of the reproduced signal and the phase of the predetermined reference signal are substantially synchronized, a common phase error detection means that generates an error signal according to the phase difference between these two signals is activated. The present invention is characterized in that the output is used to drive the coarse adjustment means and the fine adjustment means.

本発明による他の時間軸制御方式は、再生信号と所定基
準信号との位相差に応じた工□ラー信号を発生しかつこ
の位相差の検出感度が相異なる2つの位相誤差検出手段
を設け、先ず検出感度が低い方の位相誤差検出手段の出
力により粗調手段を駆動し、この粗調手段を含むサーボ
系がロックして再生信号と所定基準信号との位相が略同
期した時点で、検出感度の良好な方の位相検出手段の出
力によシ粗調手段と微調手段とを駆動するようにまたこ
とを特徴としている。    □ 以下に本発明について第3図を用いて説明する。
Another time axis control method according to the present invention includes two phase error detection means that generate a processor signal according to the phase difference between the reproduced signal and a predetermined reference signal and have different detection sensitivities for this phase difference, First, the coarse adjustment means is driven by the output of the phase error detection means with lower detection sensitivity, and when the servo system including this coarse adjustment means is locked and the phases of the reproduced signal and the predetermined reference signal are approximately synchronized, the detection is performed. It is also characterized in that the coarse adjustment means and the fine adjustment means are driven by the output of the phase detection means having better sensitivity. □ The present invention will be explained below using FIG. 3.

第3図において第1図と同等部分は同一符号により示さ
れている。スピンドルサーボ系は、ダイナミックレンジ
が広く検出感度は低いPDIと、このPDIの出力とタ
ンゼンシャルサーボ系のサーボアンプ7の出力とを選択
するスイッチ11と、このスイッチ11V?−19選択
されたエラー信号を増幅するアンプ8及び9とを含み、
終段のドライブアンプ9によシスピンドルモータの回転
が駆動制御される。
In FIG. 3, parts equivalent to those in FIG. 1 are designated by the same reference numerals. The spindle servo system includes a PDI with a wide dynamic range and low detection sensitivity, a switch 11 that selects the output of this PDI and the output of the servo amplifier 7 of the tangential servo system, and this switch 11V? -19 amplifiers 8 and 9 for amplifying the selected error signal;
The rotation of the system spindle motor is drive-controlled by the drive amplifier 9 at the final stage.

クンゼンシャルサーボ系はダイナミックレンジは狭いが
検出感度がよシ良好fxPD2を有し、このPD2によ
るエラー出力がバッファ4及びループスイッチ6を介し
てサーボアンプ7へ入力さhる。
The Kunsential servo system has an fxPD2 which has a narrow dynamic range but good detection sensitivity, and the error output from this PD2 is input to the servo amplifier 7 via the buffer 4 and the loop switch 6.

このサーボアンプ出力は直流カット用コンデンサC2を
介してドライブアンプ10を入力されてタンゼンシャル
ミラー駆動信号となる。そインチ6笈び11はスピンド
ルサーボロック信号によりオンオフ制御されるもので、
このスピンドルサーボ系がロックする以前は図示の如く
なっている。すなわち、タンゼンシャルサーボループは
オープンであシ、スピンドルサーボ系はPD、1のエラ
ー出力によシ作動している。スピンドルサーボ系がロッ
クすれば、タンゼ/シャル丈−ボループがオンとなシ、
かつこのタンゼンシャル丈−ボ系のPD2によるエラー
出力によシスピンドルサーボ系が作動するようになるの
である。
This servo amplifier output is input to the drive amplifier 10 via a DC cut capacitor C2 and becomes a tangential mirror drive signal. The inch 6 and 11 are on/off controlled by the spindle servo lock signal.
Before the spindle servo system is locked, it looks as shown in the figure. That is, the tangential servo loop is open, and the spindle servo system is operated by the error output of PD1. If the spindle servo system is locked, the tanze/shall length-voloop will be on.
Moreover, the system spindle servo system is activated by the error output from PD2 of the tangential length-bore system.

スピンドルモータが回転を始め基準信号と再生信号との
位相が略同期すると、スイッチ6が閉じてタンゼンシャ
ルサーボ系が動作し始める。同時に、今までスピンドル
モータにエラー信号を供給していたPDIの出力は断と
なり、その代I)にPD2の出力による動作するから、
ツーーボアング7の出力点には超低域を含む直流成分が
残存しないようになる。このスピンドルサーボ系で除去
し得ない残留誤差成分(30Hzが主体)がタンゼンシ
ャルミラーによシ除去されることになる。
When the spindle motor starts rotating and the phases of the reference signal and reproduction signal are substantially synchronized, the switch 6 is closed and the tangential servo system starts operating. At the same time, the output of PDI, which had been supplying error signals to the spindle motor until now, is cut off, and the output of PD2 is used instead.
At the output point of the two-bore 7, no DC component including ultra-low frequencies remains. The residual error component (mainly 30 Hz) that cannot be removed by this spindle servo system is removed by the tangential mirror.

従って、コンデン−+jC2には直流成分が印加されな
いためにタンゼンシャルミラーの安定点は常に中立点と
なって中立点からの片寄シラ防ぐことができる。コンデ
ンvC2には直流成分が印加されないので、この直流阻
市用コンデンサC2は省略することができる。しかしな
がら、このコンデンサC2よシ前段の回路(例えばバッ
ファ4やアンプ7)のオフセットやドリフトがあればこ
の影響を防止するために有用である。
Therefore, since no DC component is applied to the condenser +jC2, the stable point of the tangential mirror is always the neutral point, and deviation from the neutral point can be prevented. Since no DC component is applied to the capacitor vC2, the DC blocking capacitor C2 can be omitted. However, if there is an offset or drift in the circuits (for example, the buffer 4 and the amplifier 7) at the stage before the capacitor C2, it is useful to prevent this influence.

この回路構成では時定数回路を有していないので、スイ
ッチ6のオン直後におけるタンゼンシャルミラーの安定
点への収束も速やかかつ安定に行われることになる。ま
た、スピンドル茅−ボロツタ後は、共通したPI)、、
:2(p、出力を用いて両サーボ系を動作させるように
して、いるので1.再生、信号の同期位相の安定化及び
高−変化が可能となる。
Since this circuit configuration does not have a time constant circuit, the tangential mirror converges to a stable point immediately after the switch 6 is turned on quickly and stably. Also, after the spindle grass-boro ivy, the common PI),,
:2(p) Since both servo systems are operated using the output, 1. Reproduction, stabilization of the synchronized phase of the signal, and high-level changes are possible.

斜上の如く、本発明によれば直蝉阻止用コンデンサを取
9除いたので所定の同期位相への引込みが速やかに行わ
れまた、正常動作時は共通した高感度のPDを用いて粗
調及び微調の両サーボ系を駆動しているので同期精度が
良好となる。その結果、□ 複数の再生装置ρ出力を1つの基準信号に、位相ロック
させて用いるいわゆる外部同期をなす場合には極めて有
効な方式となるのである。
As shown above, according to the present invention, since the capacitor for blocking the straight-circuit is removed, the pull-in to the predetermined synchronization phase is quickly performed, and during normal operation, coarse adjustment is performed using a common high-sensitivity PD. Since both the servo system and the fine adjustment servo system are driven, synchronization accuracy is good. As a result, this is an extremely effective method for so-called external synchronization in which the ρ outputs of a plurality of playback devices are phase-locked to one reference signal.

尚、微調手段としてタンゼンシャルミラーヲ用いたが、
その代シにC0D(チャージカップルドデバイス)等の
可変遅延μ子を用いて再生信号をこの遅延素子を通すよ
うなザーボ系としても等価であることは明白である。
Although a tangential mirror was used as a fine adjustment means,
It is clear that a servo system in which a variable delay µ element such as a C0D (charge coupled device) or the like is used and the reproduced signal is passed through this delay element is also equivalent.

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

第1図は従来の時間軸制御方式を示すブロック図、第2
図は第1図のブロックの動作を示す波形図、第3図は本
発明の実施例のブロック図でを〕る0±要!分の符号の
説明 1、.2・・・・・・PD    6・・・・・・ルー
プスイッチ11・・・・・・切替、スイッチ 9.1o・・・・・・ドライブアンプ 。 出願人 パイオニア株式会、社 代理人  弁理士  藤 村 元1彦
Figure 1 is a block diagram showing the conventional time axis control method, Figure 2
The figure is a waveform diagram showing the operation of the blocks in Figure 1, and Figure 3 is a block diagram of an embodiment of the present invention. Explanation of minute signs 1, . 2...PD 6...Loop switch 11...Switch, switch 9.1o...Drive amplifier. Applicant Pioneer Co., Ltd., company agent Patent attorney Motoichihiko Fujimura

Claims (2)

【特許請求の範囲】[Claims] (1)再生信号の時間軸の粗調整及び微調整を夫々なす
粗調手段及び微調手段を有する記録情報再生装置におけ
る時間軸制御方式であって、tTJ記再生信号の位相と
所定基準信号の位相とが略同期している期間は、これら
両信号の位相差に応じたエラー信号を発生する共通の位
相誤差検出手段の出力を用いて前記粗調手段及び微調手
段を駆動するようにしたことを特徴とする時間軸制御方
式。
(1) A time axis control method in a recorded information reproducing apparatus having a coarse adjustment means and a fine adjustment means for coarsely adjusting and finely adjusting the time axis of a reproduced signal, the phase of the tTJ reproduction signal and the phase of a predetermined reference signal. During the period when the two signals are substantially synchronized, the coarse adjustment means and the fine adjustment means are driven using the output of a common phase error detection means that generates an error signal according to the phase difference between these two signals. Features a time axis control method.
(2)再生信号の時間軸の粗調整及び微調整を夫々なす
粗調手段及び微調手段を有する記録情報再生装置におけ
る時間軸制御方式であって、前記再生信号と所定基準信
号との位相差に応じたエラー信号を発生しかつこの位相
差の検出感度が相異する2つの位相誤差検出手段を設け
、先ず検出感度が低い方の前記位相誤差検出手段の出力
によシ前記粗調手段を駆動し、前記再生信号とAiJ記
所定基準信号との位相が略同間した時点において検出感
度の良好な方の前記位相誤差検出手段の出力によシ前記
粗調手段と微調手段とを駆動するようにしたことを特徴
とする時間軸制御方式。
(2) A time axis control method in a recorded information reproducing apparatus having a coarse adjustment means and a fine adjustment means for coarsely adjusting and finely adjusting the time axis of a reproduced signal, the method comprising adjusting the phase difference between the reproduced signal and a predetermined reference signal. Two phase error detection means are provided which generate error signals corresponding to the phase difference and have different detection sensitivities for this phase difference, and first, the rough adjustment means is driven by the output of the phase error detection means with lower detection sensitivity. and the coarse adjustment means and the fine adjustment means are driven by the output of the phase error detection means having better detection sensitivity at the time when the phases of the reproduced signal and the predetermined reference signal described in AiJ become substantially the same. A time axis control method characterized by the following.
JP2049683A 1983-02-09 1983-02-09 Time axis control system Granted JPS59146481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2049683A JPS59146481A (en) 1983-02-09 1983-02-09 Time axis control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2049683A JPS59146481A (en) 1983-02-09 1983-02-09 Time axis control system

Publications (2)

Publication Number Publication Date
JPS59146481A true JPS59146481A (en) 1984-08-22
JPH0514353B2 JPH0514353B2 (en) 1993-02-24

Family

ID=12028765

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2049683A Granted JPS59146481A (en) 1983-02-09 1983-02-09 Time axis control system

Country Status (1)

Country Link
JP (1) JPS59146481A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61204840A (en) * 1985-03-08 1986-09-10 Olympus Optical Co Ltd Optical information recording and reproducing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55948A (en) * 1978-06-19 1980-01-07 Pioneer Video Corp Servo unit of optical information reader
JPS57126772U (en) * 1981-01-28 1982-08-07
JPS57211612A (en) * 1981-06-23 1982-12-25 Sony Corp Phase servo circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55948A (en) * 1978-06-19 1980-01-07 Pioneer Video Corp Servo unit of optical information reader
JPS57126772U (en) * 1981-01-28 1982-08-07
JPS57211612A (en) * 1981-06-23 1982-12-25 Sony Corp Phase servo circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61204840A (en) * 1985-03-08 1986-09-10 Olympus Optical Co Ltd Optical information recording and reproducing device
JPH0612572B2 (en) * 1985-03-08 1994-02-16 オリンパス光学工業株式会社 Optical information recording / reproducing device

Also Published As

Publication number Publication date
JPH0514353B2 (en) 1993-02-24

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