JPS5992459A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS5992459A
JPS5992459A JP57201914A JP20191482A JPS5992459A JP S5992459 A JPS5992459 A JP S5992459A JP 57201914 A JP57201914 A JP 57201914A JP 20191482 A JP20191482 A JP 20191482A JP S5992459 A JPS5992459 A JP S5992459A
Authority
JP
Japan
Prior art keywords
mode
counter
speed
down counter
preset
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.)
Pending
Application number
JP57201914A
Other languages
Japanese (ja)
Inventor
Chikayuki Okamoto
周幸 岡本
Yasunori Kobori
康功 小堀
Isao Fukushima
福島 勇夫
Katsuhiko Goto
克彦 後藤
Tsunehiko Tejima
手嶋 恒彦
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP57201914A priority Critical patent/JPS5992459A/en
Publication of JPS5992459A publication Critical patent/JPS5992459A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/1808Driving of both record carrier and head
    • G11B15/1875Driving of both record carrier and head adaptations for special effects or editing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To swtich a magnetic recording/reproducing device to a speed corresponding to the motor capacity in response to a switch of a video record time mode by advancing an up-down counter with acceleration and deceleration pulses, presetting a dividing counter with the output of the up-down counter and the presetting is carried out again when the operation speed exceeds the motor capacity. CONSTITUTION:It is assumed that an up-down counter 13 is properly preset by a presetting circuit 14 at a start time point, and the counter is reset at the highest speed of each time mode. The drives of 7-, 9- and 15-times speeds possible in a preceding mode are impossible in the next mode since the tape to be reproduced is shifted to a 2-hour record part from a 6-hour record mode. Thus a mode switch signal is discriminated by a changing direction discriminating circuit 15. Then the counter 13 is preset again by a preset pulse generating circuit 14 only when the 6-hour record mode is changed to the 2-hour record mode. This presetting is also possible at a specified multiple speed in the 6-hour record mode, e.g., at 7-, 9- and 15-times speeds which are impossible in the 2-hour record mode for driving.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は可変速再生可能な磁気記録再生装置に係り、ヤ
にテープ走行速度モードが多く存在する磁気記録再生装
置の早見再生(以後、サーチ再生と称す)システムに関
する。
[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a magnetic recording and reproducing device capable of variable speed reproduction. system).

〔従来技術〕[Prior art]

磁気記録再生装置のサーチ再生として本願出願人と同一
出願人が出願した特願昭57−14760号がある。以
下これを第1図、第2図を用いて説明する。第1図にお
いて1はキャプスタンモータ、2はキャプスタンモータ
の回転に応じた周波数の信号を発生する発電コイル(以
下、この信号をCFG信号、コイルをCFGコイルと略
す。
There is Japanese Patent Application No. 57-14760 filed by the same applicant as the applicant of the present application as a search reproduction for a magnetic recording/reproducing device. This will be explained below using FIGS. 1 and 2. In FIG. 1, 1 is a capstan motor, and 2 is a generator coil that generates a signal with a frequency corresponding to the rotation of the capstan motor (hereinafter, this signal will be abbreviated as a CFG signal, and the coil will be abbreviated as a CFG coil).

3は増幅器、4は分周カウンタ、5は周波数−電圧変換
器、6は差動増幅器、7はモータ駆動回路、8は分周カ
ウンタ4のプリセット値を発生する回路、9は基準電圧
発生回路である。本例において、キャプスタンモータ1
で発生したCFG信号は増幅器3で適当に増幅され、分
局器4で分周され、周波数−電圧変換器5で電圧信号に
変換される。さらにこの信号は基準電圧発生器9で発生
される適当な基準電圧に対し、差動増幅器6で比較され
る。この結果得られる、基準電圧に対する誤差信号は駆
動回路7に入力され、キャプスタンモータ1を負帰還さ
れる。
3 is an amplifier, 4 is a frequency division counter, 5 is a frequency-voltage converter, 6 is a differential amplifier, 7 is a motor drive circuit, 8 is a circuit that generates a preset value for the frequency division counter 4, 9 is a reference voltage generation circuit It is. In this example, the capstan motor 1
The CFG signal generated is appropriately amplified by an amplifier 3, frequency-divided by a divider 4, and converted into a voltage signal by a frequency-voltage converter 5. This signal is further compared in a differential amplifier 6 against a suitable reference voltage generated by a reference voltage generator 9. The resulting error signal with respect to the reference voltage is input to the drive circuit 7 and is negatively fed back to the capstan motor 1.

このループは、周知のごとく、速度制御機構とじて−゛
般的ものであるが、ループ中に分局器4を設け、この分
局器の分周比を設定するプリセット値を、以下の手段で
可変とし、さらに、2時間録画、6時間録画という、録
画時のテープ走行速度モードの変化信号によって分局比
を切換える。ここで、分周器40分周比は再生の倍速数
に一致し、これを変化するのに、第2図のような構成が
考えられる。第2図において、10は可変抵抗器、11
はアナログ−ディジタル変換器、12は論理回路、4は
分周器である。ここにおいて、可変抵抗器10の偏位は
アナログ−ディジタル変換器によりディジタル量り、に
変換され、これから、分局器4へのプリセット値D2に
変換するよう、論理ゲート12は動作する。また、この
ゲートは、2時間録画、6時間録画といったモード切換
わりに応じて、再生倍速数を切換える役目もする。この
目的はモータ能力に関係する。即ち、周知のように、2
時間録画モードでは6時間録画モードの3倍の速度でテ
ープ走行させるため、モータへの負荷が二倍太きい。1
って、モータの駆動能力限界がら2時間録画モードで1
5倍倍速性可能ならば6時間録画モードでは、その6分
の1の5倍速走行までしか駆動できない。そこで、前述
のDlがらD2への変換を行う論理ゲート12に工夫を
施し、同じDlに対するD2の値を録画モードの違いに
よって異ならせることとする。たとえば可変抵抗器の偏
位なアナログ−ディジタル変換した、oo、oi。
As is well known, this loop is a common speed control mechanism, but a divider 4 is provided in the loop, and a preset value for setting the division ratio of this divider is varied by the following means. Furthermore, the division ratio is switched according to a change signal of the tape running speed mode at the time of recording, such as 2-hour recording or 6-hour recording. Here, the frequency division ratio of the frequency divider 40 corresponds to the reproduction speed number, and in order to change this, a configuration as shown in FIG. 2 can be considered. In FIG. 2, 10 is a variable resistor, 11
1 is an analog-to-digital converter, 12 is a logic circuit, and 4 is a frequency divider. Here, the logic gate 12 operates to convert the deviation of the variable resistor 10 into a digital measure by an analog-to-digital converter, and from there into a preset value D2 to the divider 4. This gate also serves to switch the playback speed number in response to mode switching such as 2-hour recording and 6-hour recording. This purpose is related to motor capacity. That is, as is well known, 2
In the time recording mode, the tape is run at three times the speed as in the 6-hour recording mode, so the load on the motor is twice as heavy. 1
So, due to the motor's drive capacity limit, it is 1 in recording mode for 2 hours.
If 5x speed is possible, in the 6-hour recording mode, it can only be driven up to 1/6th of that speed, 5x speed. Therefore, the logic gate 12 that converts Dl to D2 is modified so that the value of D2 for the same Dl differs depending on the recording mode. For example, analog-to-digital conversion of variable resistor deviation, oo, oi.

10というり、に対し、6時間録画モードでは1,7゜
15分周を行うようにプリセット値D′2を発生し、2
時間録画時間モードでは1.3.5分周を行うようプリ
セット値D; を発生させる。
10, whereas in the 6-hour recording mode, a preset value D'2 is generated to divide the frequency by 1.7 degrees by 15.
In the time recording time mode, a preset value D; is generated to perform frequency division by 1.3.5.

以上のように本方式によれば、可変抵抗器の偏位により
再生速度可変となり、録画時間モードの切換え信号によ
り、□各モードでのモータの駆動限界まで早見再生速度
を上げることができる利点がある。この場合、可変抵抗
器の偏位というアナログ量をシステムに大刀するため、
マイコンや、ワイヤレスリモコン等からのディジタル信
号による早見速度制御には適さない。
As described above, according to this method, the playback speed can be varied by deflection of the variable resistor, and the quick playback speed can be increased up to the motor drive limit in each mode using the recording time mode switching signal. be. In this case, in order to incorporate the analog quantity of variable resistor deviation into the system,
It is not suitable for quick speed control using digital signals from a microcomputer, wireless remote control, etc.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、回速、減速をデジタル信号で制御し、
かつ録画時間モード切換えに従ってモータ能力に見合っ
た速度に切換える磁気記録再生装置を提供することにあ
る。
The purpose of the present invention is to control rotation speed and deceleration using digital signals,
Another object of the present invention is to provide a magnetic recording/reproducing device which switches the speed to match the motor capacity in accordance with the switching of the recording time mode.

〔発明の概要〕[Summary of the invention]

本発明は、サーチ速度変化可能なシステムで回速、減速
パルスでアップダウンカウンタを進め、その出力を変換
して分周カウンタのプリセット値とした上、モータ能力
を越えた分周比になる場合にはアップダウンカウンタを
プリセットし直すものである。
The present invention is a system that can change the search speed, advances an up/down counter with rotational speed and deceleration pulses, converts the output and uses it as a preset value for the frequency division counter, and when the frequency division ratio exceeds the motor capacity. The up/down counter is re-preset.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例を、第3図を用いて説明する。 An embodiment of the present invention will be described below with reference to FIG.

第3図において、−13はアップダウンカウンタ、14
はアップダウンカウンタ13のプリセットパルス発生回
路、15はモード切換信号の変化方向判別回路である。
In Figure 3, -13 is an up/down counter, 14
15 is a preset pulse generation circuit for the up/down counter 13, and a circuit for determining the direction of change of the mode switching signal.

今、録画時間モード2時間、6時間について、早見再生
可能な倍速数を′それぞれ3,5および3,5,7,9
,15倍速とし、駆動するキャプスタンモータ1の能力
限界を2時間録画モード5倍とする。また、各倍速数に
対応するアップダウンカウンタ160ビツトパターンを
表1に示すものとする。この例ではアップカウントで倍
速数か上がる方向としているが逆方向にピッドパノーン
を割り当てることも可能なことは明らかである。本シス
テム起動時に適当にアップダウンカウンタがプリセット
されるものとし、プリセット回路14がこれを行い、各
時間モードの最高速にリセットされるとする。
Now, for the recording time mode 2 hours and 6 hours, the speed numbers that can be played quickly are 3, 5 and 3, 5, 7, and 9, respectively.
, 15 times the speed, and the capacity limit of the driving capstan motor 1 is set to 5 times the speed in the 2-hour recording mode. Furthermore, Table 1 shows the 160-bit pattern of the up/down counter corresponding to each double speed number. In this example, the up count is used to increase the double speed number, but it is clear that it is also possible to assign the pid pantone in the opposite direction. It is assumed that the up/down counter is appropriately preset when this system is started up, and that the preset circuit 14 performs this and is reset to the highest speed of each time mode.

ここで、再生するテープが6時間録画部分から2時間録
画部分に遷移することを考えれば、前モードで駆動可能
な7,9.15倍速の駆動は後モードでは不可能である
ので、後モードでの系の動作が不安定になる。そこで、
本発明では、モード切換信号を変化方向判別回路15で
判別し、6時間録画モードから2時間録画モードに変化
する時のみ、プリセットパルス発生回路14によりアッ
プダウンカウンタ13をプリセットし直すようにした。
Here, considering that the tape being played transitions from a 6-hour recorded portion to a 2-hour recorded portion, the 7 and 9.15 times speed that can be driven in the previous mode is not possible in the rear mode, so The operation of the system becomes unstable. Therefore,
In the present invention, the mode switching signal is discriminated by a change direction discriminating circuit 15, and the up/down counter 13 is re-preset by a preset pulse generating circuit 14 only when changing from a 6-hour recording mode to a 2-hour recording mode.

このプリセットは6時間録画モードにおける特定の倍速
時、たとえば、2時間モードにおいて駆動不可能な7,
9.15倍速時のみ行うことも可能である。また、録画
モード変化時には常にプリセットをするようにしても良
いことは明らかで、この時のブロック図は第4図のよう
になる。
This preset is set at a certain double speed in 6-hour recording mode, for example, 7, which cannot be driven in 2-hour mode.
It is also possible to perform this only at 9.15x speed. Further, it is obvious that the presetting may be performed whenever the recording mode is changed, and the block diagram in this case is as shown in FIG. 4.

本例では、モータのCFG周波数を分周し分周された周
波数が常に一定になるようにする、所謂、速度制御系に
のみ実施したか、テープ上に記録されたコントロールパ
ルスを分周し、回転ヘッドの回転位相と定位相となるよ
う制御する所謂、位相制御系に同時に実施することも可
能なことは言うを待たない。
In this example, the CFG frequency of the motor is divided so that the divided frequency is always constant, which is the so-called speed control system, or the control pulse recorded on the tape is divided. Needless to say, it is also possible to simultaneously implement this method in a so-called phase control system that controls the rotational phase of the rotary head to maintain a constant phase.

以上、本発明により、録画時間の切換えに拘らず、モー
タの駆動能力内で制御可能な倍速数で早見再生できる。
As described above, according to the present invention, quick playback can be performed at a controllable multiple speed within the driving capacity of the motor, regardless of the switching of the recording time.

さらに本発明を拡張し、時間モードの変化にも拘らず常
にモータ能力内、最高速で早見再生可能となるシステム
として、他の実施例を第5図によ・り説明する。第5図
において、20,21.aoは定電圧源であり、それぞ
れの電圧はV2Or V21 r VSOであるとする
。また、22 、23は比較器であり、前者は、0点の
電位がV2Oより高い時に出力ハイ、後者は、0点の電
位がV21 より低い時に出力ハイとなるものである。
Another embodiment of the present invention will be explained with reference to FIG. 5 as a system that further expands the present invention and allows quick playback at the maximum speed within the motor capacity regardless of changes in the time mode. In FIG. 5, 20, 21. It is assumed that ao is a constant voltage source, and the respective voltages are V2Or V21 r VSO. Further, 22 and 23 are comparators, the former outputs high when the potential at point 0 is higher than V2O, and the latter outputs high when the potential at point 0 is lower than V21.

また、25,26,28,29は抵抗、24は容量、2
7はダイオードである。B点の電位は早見再生のときの
みVSOと等しい電位、他の時はゼロとし、Aには充分
な振幅のパルスが入力されるものとする。ちなみに第5
図におけるアップ信号、ダウン信号は、第6,4図にお
けるものと一致する。さて、早見再生時には、B点電位
はV、。に等しいから、抵抗25対抵抗26および抵抗
28対抵抗29をほぼ等しい比にすれば、0点とD点の
バイアス電位は互いにはぼ等しくなる。容量24と抵抗
25,26により、D点にはA点のパルスを微分した信
号が現れる。
Also, 25, 26, 28, 29 are resistors, 24 is a capacitor, 2
7 is a diode. It is assumed that the potential at point B is equal to VSO only during quick playback, and is zero at other times, and a pulse of sufficient amplitude is input to A. By the way, the fifth
The up signal and down signal in the figure match those in FIGS. 6 and 4. Now, during quick playback, the potential at point B is V. Therefore, if the ratios of resistor 25 to resistor 26 and resistor 28 to resistor 29 are made approximately equal, the bias potentials at point 0 and point D will be approximately equal to each other. Due to the capacitor 24 and resistors 25 and 26, a signal obtained by differentiating the pulse at point A appears at point D.

この信号がダイオード27導通電位より高(なると、ダ
イオード27は導通し、0点の電位は上昇する。(の電
位がV2゜より太きけれ+!比較器22の出力〕1イと
なり、アップ信号として検出される。つまり、A点のノ
くルス立上り時にアップ信号が検出される。その他の場
合、ダイオード27は遮断であり、Vzo > 0点の
ノくイアスミ圧〉V21としておけば、ダウン信号は常
時ロウである。
When this signal becomes higher than the conduction potential of the diode 27, the diode 27 becomes conductive and the potential of the 0 point rises. In other words, the up signal is detected when the pulse at point A rises.In other cases, the diode 27 is cut off, and if Vzo>0 point pressure>V21, the down signal will be detected. It is always low.

これにより、早見再生時にはアップ信号のみ入力され、
2時間録画モードで5倍、6時間録画モードで15倍の
早見再生が行われる。
As a result, only the up signal is input during quick playback,
Quick playback is performed at 5x in 2-hour recording mode and 15x in 6-hour recording mode.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、一対のノくルス入力により、加速、減
速可能な倍速再生が可能で、かつ、録画時間モードが変
化してもなお、常にモータの駆動可能な範囲内の倍速数
で動作するシステムが実現でき、機能充実の効果がある
According to the present invention, double-speed playback with acceleration and deceleration is possible using a pair of noculus inputs, and even if the recording time mode changes, the operation always operates at a double-speed number within the driveable range of the motor. It is possible to realize a system that does this, and has the effect of enhancing functionality.

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

第1図、第2図は本出願人が先に提案した磁気記録再生
装置のブロック図、第6図は本発明の一実施例を示すブ
ロック図、第4図、第5図は本発明の他の実施例を示す
ブロック図である。 4・・・・・・・・・・・・分周器 12・・・・・・・・・論理ゲート 13・・・・・・・・・分周カウンタ 14・・・・・・・・・プリセットパルス発生器寛  
 5 b 7/フイ邑゛ち ダプンイ乙2
FIGS. 1 and 2 are block diagrams of a magnetic recording and reproducing apparatus previously proposed by the applicant, FIG. 6 is a block diagram showing an embodiment of the present invention, and FIGS. FIG. 3 is a block diagram showing another embodiment. 4... Frequency divider 12... Logic gate 13... Frequency division counter 14...・Preset pulse generator
5 b 7/Fuimurachidapunii Otsu 2

Claims (1)

【特許請求の範囲】[Claims] モータ回転により発電された信号で速度制御が施された
モータサーボシステムにより、磁気テープが駆動され、
磁気テープ記録時に複数のテープ速度のモードが存在す
る磁気記録再生装置において、テープ再生時圧モータの
発電信号を分周する分周カウンタと、アップダウンカウ
ンタとを設け、分局カウンタのプリセット値を該アップ
ダウンカウンタの各ビット情報から、発生し、テープ再
生時、テープ走行速度のモードが変化した時点で、アッ
プダウンカウンタをプリセットすることを特徴とする磁
気記録再生装置。
The magnetic tape is driven by a motor servo system whose speed is controlled by signals generated by motor rotation.
In a magnetic recording/reproducing device that has multiple tape speed modes during magnetic tape recording, a frequency dividing counter and an up/down counter are provided to divide the frequency of the power generation signal of the pressure motor during tape reproduction, and the preset value of the branch counter is set according to the frequency. A magnetic recording/reproducing apparatus characterized in that the up/down counter is generated from each bit information of the up/down counter, and the up/down counter is preset at the time when the tape running speed mode changes during tape playback.
JP57201914A 1982-11-19 1982-11-19 Magnetic recording and reproducing device Pending JPS5992459A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57201914A JPS5992459A (en) 1982-11-19 1982-11-19 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57201914A JPS5992459A (en) 1982-11-19 1982-11-19 Magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS5992459A true JPS5992459A (en) 1984-05-28

Family

ID=16448894

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57201914A Pending JPS5992459A (en) 1982-11-19 1982-11-19 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5992459A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61154379A (en) * 1984-12-27 1986-07-14 Toshiba Corp High speed reproducing device of video tape recorder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61154379A (en) * 1984-12-27 1986-07-14 Toshiba Corp High speed reproducing device of video tape recorder

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