JPS58158065A - Magnetic recording and reproducing device - Google Patents
Magnetic recording and reproducing deviceInfo
- Publication number
- JPS58158065A JPS58158065A JP57039814A JP3981482A JPS58158065A JP S58158065 A JPS58158065 A JP S58158065A JP 57039814 A JP57039814 A JP 57039814A JP 3981482 A JP3981482 A JP 3981482A JP S58158065 A JPS58158065 A JP S58158065A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- output
- interval detection
- track
- speed
- 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
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, 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
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
- G11B15/087—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing recorded signals
Abstract
Description
【発明の詳細な説明】
本発明は磁気記録再生装置に関するもので、その目的と
するところは高速走行状態でテープに録音された信号の
曲間を確実に検出する装置を提供することにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording/reproducing device, and an object of the present invention is to provide a device that reliably detects the intervals between songs recorded on a tape while running at high speed.
従来、磁気記録再生装置では、チーブを高速走行させる
とともにヘッドをテープに当接させ、そのヘッド出力信
号の有無によって曲間を検出し曲の頭出し機能としてい
た。そして信号の有無は一定の時定数回路とレベル検知
回路を組合せて検出するようにしていた。Conventionally, in magnetic recording and reproducing apparatuses, the head is moved at high speed and the head is brought into contact with the tape, and the gap between songs is detected based on the presence or absence of an output signal from the head, and the function is to locate the beginning of a song. The presence or absence of a signal is detected using a combination of a constant time constant circuit and a level detection circuit.
また、テープの高速走行駆動は巻取りあるいは供給リー
ル軸のいずれか一方を駆動するようにしているだめ、テ
ープ巻量変化にともなってテープの高速走行速度が変化
する状態にあった。したがって、テープに一定間隔毎に
複数の曲ならびに曲間があってもテープ速度の変化によ
シ曲間を確実に検出することが困難であった。Furthermore, since the tape is driven to run at high speed by driving either the take-up or supply reel shaft, the high-speed tape run speed changes as the amount of tape winding changes. Therefore, even if a tape has a plurality of songs and song gaps at regular intervals, it is difficult to reliably detect the song gaps due to changes in tape speed.
例ｔ ば、コンパクトカセットを用いた場合のキュー、
レビュ一時のテープ速度は第１図に示すように通常の再
生時の定速に対して１６倍から３２倍ぐらいまで変化す
る。また、テープに通常の定速走行時に４秒間の曲間が
設けられている場合に、これがキュー、レビュ一時には
その時間幅は第２図に示すようになる。その結果、テー
プ位置によって曲間時間が２倍以上異なり、検出回路部
を短かい方に時間設定すると正規の曲間でないところで
誤動作したり、長い方に時間設定すれば曲間が存在して
も飛びこえて検知できなくなるという欠点があった。For example, the cue when using a compact cassette,
As shown in FIG. 1, the tape speed during review varies from about 16 times to 32 times the constant speed during normal playback. Further, when a tape is provided with a 4 second interval during normal constant speed running, the time width during cue and review time is as shown in FIG. As a result, the inter-track time differs by more than twice depending on the tape position, and if the detection circuit is set to a shorter time, it may malfunction at a place that is not a normal track interval, and if the detection circuit is set to a longer time, it may malfunction even if there is a track interval. The drawback was that it could fly over the air and become undetectable.
本発明は上記欠点を改善したものであり、以下図面にも
とすいて説明する。The present invention improves the above-mentioned drawbacks, and will be explained below with reference to the drawings.
第３図は本発明装置の一実施例の基本構成であり、テー
プ２は供給リール１から巻取り−ル３へ矢印８の方向に
高速走行しているものとし、ヘッド４はテープ２に当接
し信号を再生する。増幅器５はヘッド４の出力を増幅し
、曲間検知手段６へ信号を供給する。曲間検知手段６の
第１の曲間検知出力６０１と第２の曲間検知出力６０２
は制御部７に指令を与え、高速走行時２の走行方向切換
指令および高速走行から定速または停止への動作切換指
令として作用する。制御部７にはテープ２の走行、ヘッ
ド４の位置などを制御する回路ならびに機構が含まれる
。FIG. 3 shows the basic configuration of an embodiment of the apparatus of the present invention, in which it is assumed that the tape 2 is running at high speed in the direction of arrow 8 from the supply reel 1 to the take-up reel 3, and the head 4 is in contact with the tape 2. Regenerate the contact signal. The amplifier 5 amplifies the output of the head 4 and supplies a signal to the song interval detection means 6. First song interval detection output 601 and second song interval detection output 602 of song interval detection means 6
gives a command to the control unit 7, which acts as a driving direction switching command during high-speed running 2 and an operation switching command from high-speed running to constant speed or stop. The control section 7 includes circuits and mechanisms for controlling the running of the tape 2, the position of the head 4, and the like.
つぎに曲間検知手段６について第４図を用いて説明する
。増幅器５からの出力はコンパレータ６０４の一方の入
力端子６０３に加えられる。このコンパレータ６０４の
他方の入力端子には抵抗６０５と６０６の分圧比によっ
て定まる基準電圧が印加されている。しだがってコンパ
レータ６０４は入力端子６０３からの交流入力信号が基
準電圧よりも大きいときに同じ周期の正のパルスを発生
し、一方交流入力信号が基準電圧以下もしくは無信号時
には零または負の出力を生ずる。そしてトランジスタ６
０７はコンパレータ６０４の出力によって駆動されて開
閉動作を行なう。Next, the song interval detection means 6 will be explained using FIG. 4. The output from amplifier 5 is applied to one input terminal 603 of comparator 604. A reference voltage determined by the voltage division ratio of resistors 605 and 606 is applied to the other input terminal of this comparator 604. Therefore, the comparator 604 generates a positive pulse of the same period when the AC input signal from the input terminal 603 is greater than the reference voltage, while it generates a zero or negative output when the AC input signal is less than the reference voltage or there is no signal. will occur. and transistor 6
07 is driven by the output of the comparator 604 to perform opening/closing operations.
抵抗６０８とコンデンサθｏ９は曲間に対応した直流電
圧を発生する作用を行なう。すなわち、増幅器５から交
流信号が存在している間はトランジスタ６０７が導通と
しゃ断を同じ周期でくり返し、まだ、充電時定数が放電
時定数よ・りも大きく設定しであることからコンデンサ
６０９の両端電圧はほぼ零になっている。交流信号がな
くなるとトランジスタ６０７がしゃ断状態となってコン
デンサ６０９は抵抗６０８を介して充電される。そして
その時間に対応した電圧値になる。The resistor 608 and the capacitor θo9 function to generate a DC voltage corresponding to the interval between songs. That is, while the AC signal is present from the amplifier 5, the transistor 607 repeats conduction and cutoff at the same cycle, and since the charging time constant is set larger than the discharging time constant, the voltage across the capacitor 609 remains The voltage is almost zero. When the AC signal disappears, the transistor 607 is turned off and the capacitor 609 is charged via the resistor 608. Then, the voltage value corresponds to that time.
コンパレータ６１０および６１３のそれぞれ一方の入力
端子はコンデンサ６０９に接続され、それぞれの他方の
入力端子は基準電圧を設定する抵抗６１１と６１２なら
びに６１４と６１５に接続されている。そして、コンパ
レータ６１０の第１の基準電圧はコンパレータ６１３の
第２の基準電圧よりも低く設定してあり、コンデンサ６
０９の電圧が上昇するとコンパレータ６１０が初めに出
力を生じ、その後にコンパレータ６１３が出力を生ずる
。One input terminal of each of comparators 610 and 613 is connected to capacitor 609, and the other input terminal of each is connected to resistors 611 and 612 and 614 and 615 that set a reference voltage. The first reference voltage of the comparator 610 is set lower than the second reference voltage of the comparator 613, and the capacitor 6
When the voltage at 09 increases, comparator 610 first produces an output, followed by comparator 613.
なお、コンパレータ６１０の出力は第１の曲間検知出力
、コンパレータ６１３の出力は第２の曲間検知出力と呼
ぶことにする。また、電圧レベルは正の状態をＨレベル
、零または負の状態をＬレベルと呼ぶことにする。Note that the output of the comparator 610 will be referred to as a first song interval detection output, and the output of the comparator 613 will be referred to as a second song interval detection output. Further, regarding the voltage level, a positive state will be referred to as an H level, and a zero or negative state will be referred to as an L level.
つぎに装置全体の曲間検出動作について説明する。まず
、装置はテープ巻終シ付近にあるものとし、早送り状態
でテープ２とヘッド４が当接したキュー状態にあるもの
とする。テープ上の曲間は通常の定速走行時には約４秒
間あるがこの動作状態においては第２図に示すように１
２５ ミＩＪ秒９曲間時間となる。この時間と各部のレ
ベル関係を示すと第５図に示すようになる。すなわち、
（ム）のように時刻ｔ１で信号が零になると（Ｂ）のよ
うにコンデンサ６０９の電圧は時間にほぼ比例して増加
′し、コンパレータ６１０は出力端子６０１に第６
図（Ｃ）のような出力を時刻ｔ２にて発生する。この第
１の曲間検知出力から制御手段７が指令を受け、テープ
２の走行方向を巻戻し方向、すなわち矢印９の方向へ切
換えようとする。しかし、供給リール１および巻取リー
ル３には慣性があり時刻ｔ３までキュー状態がつづく。Next, the inter-song detection operation of the entire apparatus will be explained. First, it is assumed that the apparatus is near the end of the tape winding and is in a cue state in which the tape 2 and the head 4 are in contact with each other in a fast forward state. The interval between songs on the tape is approximately 4 seconds when running at a normal constant speed, but in this operating state it is approximately 1 second as shown in Figure 2.
25 mi IJ seconds 9 inter-song time. The relationship between this time and the level of each part is shown in FIG. That is,
When the signal becomes zero at time t1 as shown in (M), the voltage of the capacitor 609 increases almost in proportion to time as shown in (B), and the comparator 610 outputs the sixth signal to the output terminal 601.
An output as shown in Figure (C) is generated at time t2. The control means 7 receives a command from this first track interval detection output and attempts to switch the running direction of the tape 2 to the rewinding direction, that is, the direction of the arrow 9. However, the supply reel 1 and the take-up reel 3 have inertia, and the queue state continues until time t3.
そしてテープ２の走行方向が時刻ｔ５で切換わるが、こ
のときヘッド４の出力は一瞬の間零になるのでコンパレ
ータ６１０および６１３にも出力が生ずるが制御手段７
はコンパレータ６１０の出力が発生してから以後は−定
時間コンパレータ６１０および６１３の出力を受けつけ
ない構成にしであるのでこれらの影響を受けずにレビュ
ー状態、すなわち矢印９の方向へテープ２を走行制御す
る。そして、時刻ｔ４にて信号が第５図（イ）のように
ふたたびなくなると仲）のようにコンデンサ６０９の電
圧が上昇する。そして時刻ｔ５にてコンパレータ６１０
が（ハ）にｔｉ、ように出力を生じる。Then, the running direction of the tape 2 is switched at time t5, but at this time, the output of the head 4 momentarily becomes zero, so outputs are also generated in the comparators 610 and 613, but the control means 7
Since the configuration is such that the output of the comparators 610 and 613 is not accepted for a certain period of time after the output of the comparator 610 is generated, the tape 2 is controlled to run in the review state without being affected by these, that is, in the direction of the arrow 9. do. Then, at time t4, when the signal disappears again as shown in FIG. 5(A), the voltage of the capacitor 609 increases as shown in FIG. Then, at time t5, the comparator 610
produces an output as (c) ti.
ところが、第２図に示すようにテープ巻終り位置テかつ
キュー状態のときと同じ曲間であるにもかかわらずレビ
ュー状態であるため曲間時間は約２倍になる。したがっ
て、コンデンサ６０９の電圧がさらに上昇し、時刻ｔ６
でコンパレータ６１３が出力端子６０２にに）に示すよ
うに出力を発生する。However, as shown in FIG. 2, even though the tape winding end position is at the tape winding end position and the time between songs is the same as in the cue state, the time between songs is approximately doubled because the review state is in effect. Therefore, the voltage of capacitor 609 further increases, and time t6
Then, the comparator 613 generates an output at the output terminal 602 as shown in (a).
このコンパレータ６１３の出力、すなわち第２の曲間検
知出力によって制御手段７は指令を受け、テープ２を定
速走行あるいは停止ズ態に切換える。The control means 7 receives a command from the output of the comparator 613, that is, the second track interval detection output, and switches the tape 2 to a constant speed running state or a stopped state.
このようにして、曲間（または曲頭とも呼ぶ）検出動作
を行う。In this way, a song interval (or also called song beginning) detection operation is performed.
テープ巻終り位置でかつキュー状態において、曲間時間
が長い場合は、コンパレータ６１０および６１３の両方
が出力を生ずるので、制御手段７はテープ２０走行方向
を切換えることなく定速走行もしくは停止状態に切換制
御する。また、テープ巻始めおよび中間位置でキュー状
態で曲間検出が行なわれる場合も同様に動作する。If the inter-track time is long at the tape winding end position and in the cue state, both comparators 610 and 613 produce outputs, so the control means 7 switches the tape 20 to constant speed running or stopped state without changing the running direction of the tape 20. Control. Further, the same operation is performed when song interval detection is performed in a cue state at the tape winding start and intermediate positions.
レビュー状態で曲間検出を行なわせるときにはキュー状
態のときと逆の動作を行なう。When performing song interval detection in the review state, the operation is opposite to that in the cue state.
このように、曲間検知手段６は第１の曲間検知出力６０
１と第２の曲間検知出力６０２とを持っておシ、制御手
段７は第１の曲間検知出力が生ずるとテープ２の高速走
行方向を逆転させ、つぎに第２の曲間検知出力が生ずる
と定速走行または停止状態へ切換制御する。すなわち、
曲間を再チェックしているので正確に検知できる。これ
をダブルチェック方式と呼ぶ。In this way, the song interval detection means 6 outputs the first song interval detection output 60.
1 and a second track interval detection output 602, the control means 7 reverses the high-speed running direction of the tape 2 when the first track interval detection output is generated, and then outputs the second track interval detection output. When this occurs, the vehicle is controlled to switch to constant speed running or stopped state. That is,
Since the intervals between songs are checked again, accurate detection is possible. This is called the double check method.
なお、キュー状態、テープ巻終り位置で第１の曲間検知
出力が出力端子６０１に生じ、制御手段７がテープ高速
走行方向を反転させても第２０曲間検知出力が出力端子
６０２に生じないときがある。この場合には正規の曲間
ではないので制御手段７は一定時間後に再度高速走行方
向を元のキュー状態にもどし、つぎの曲間を検索する。Note that in the cue state and at the tape winding end position, the first song interval detection output is generated at the output terminal 601, and even if the control means 7 reverses the tape high-speed running direction, the 20th song interval detection output is not generated at the output terminal 602. There are times. In this case, since it is not a regular song interval, the control means 7 returns the high-speed running direction to the original cue state again after a certain period of time, and searches for the next song interval.
他のテープ２の位置およびキューあるいはレビュー動作
状態に対しても同様の基本思想によるダブルチェック方
式で曲間検出を行なう。Track interval detection is also performed for other tape 2 positions and cue or review operation states using a double-check method based on the same basic concept.
以上の説明ではテープ２の定速走行に換算した曲間が４
秒のものを主体に述べたが、この曲間時間は抵抗６１１
．６１２，６１４および６１６を設定することにより変
更することが可能である。In the above explanation, the song interval converted to constant speed running of tape 2 is 4.
Although I mainly talked about seconds, this inter-song time is the resistance 611
．． It can be changed by setting 612, 614 and 616.
また、制御手段７は論理回路の組合せやマイクロコンピ
ュータで構成することも可能である。Furthermore, the control means 7 can also be constructed from a combination of logic circuits or a microcomputer.
以上のように本発明の装置によれば、曲間検知手段で第
１の曲間検知出力と第２の曲間検知出力を発生させ、第
１の曲間検知出力のみが発生した場合にはテープの高速
走行方向を反転し、第１の曲間検知出力と第２の曲間検
知出力が発生したときにはテープ走行を定速もしくは停
止へ制御手段が切換制御するようにしたことがら、テー
プ走行速度が変化しても正規に曲間を検知できるという
すぐれた効果を有する。As described above, according to the device of the present invention, the song gap detection means generates the first song gap detection output and the second song gap detection output, and when only the first song gap detection output is generated, The high-speed running direction of the tape is reversed, and when the first track interval detection output and the second track interval detection output are generated, the control means switches the tape running to a constant speed or stops. It has the excellent effect of being able to correctly detect the intervals between songs even if the speed changes.
第１図は従来のコンパクトカセットを用いた磁気記録再
生装置のテープ速度比率の一例を示す図、第２図は同テ
ープ定速走行時の４秒間の曲間の換算時間を示す図、第
３図は本発明装置の一実施例を示すブロック図、第４図
は曲間検知手段の一例を示す回路図、第６図は同動作説
明図である。
２・・・・・・テープ、４・・・・・・ヘッド、６・・
・・・・曲間検知手段、６０１・・・・・・第１の曲間
検知出力の出力端子、６０２・・・・・・第２の曲間検
知出力の出力端子、７・・・・・・制御手段。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図
第３図
第５図Figure 1 is a diagram showing an example of the tape speed ratio of a magnetic recording/reproducing device using a conventional compact cassette, Figure 2 is a diagram showing the converted time between 4 seconds of music when the same tape is running at a constant speed, and Figure 3 is a diagram showing an example of the tape speed ratio of a magnetic recording/reproducing device using a conventional compact cassette. FIG. 4 is a block diagram showing an embodiment of the apparatus of the present invention, FIG. 4 is a circuit diagram showing an example of the song interval detection means, and FIG. 6 is an explanatory diagram of the same operation. 2...Tape, 4...Head, 6...
... Song interval detection means, 601... Output terminal for first song interval detection output, 602... Output terminal for second song interval detection output, 7... ...control means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 5
Claims (1)
増幅する増幅器と、この増幅器から駆動されて第１の曲
間レベルおよび第２の曲間レベルにそれぞれ対応して第
１の曲間検知出力ならびに第２の曲間検知出力を発生す
る曲間検知手段と、第１の曲間検知出力を指令としてテ
ープの高速走行時の走行方向を切換えるとともに第２の
曲間検知出力によシテーブの高速走行から定速走行まだ
は停止へテープの走行を制御する制御手段を備え第１の
曲間検知出力のみが発生したときはテープの高速走行方
向を切換え、第１の曲間検知出力および第２の曲間検知
出力が生じたときけ定速走行あるいは停止状態へ切換制
御することを特徴とする磁気記録再生装置。A head for reproducing a tape signal, an amplifier for amplifying the output of the tape head, and a first inter-track detection device driven by the amplifier and corresponding to a first inter-track level and a second inter-track level, respectively. a track interval detection means that generates an output and a second track interval detection output; and a track interval detection means that uses the first track interval detection output as a command to switch the running direction of the tape during high-speed running, and uses the second track interval detection output to switch the running direction of the tape. It is equipped with a control means for controlling the running of the tape from high-speed running to constant-speed running or stopping, and when only the first track interval detection output is generated, the high-speed running direction of the tape is switched, and the first track interval detection output and the second track interval detection output are switched. 1. A magnetic recording and reproducing device characterized in that when the inter-track detection output of 2 occurs, switching control is performed to a constant speed running state or a stopped state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57039814A JPS58158065A (en) | 1982-03-12 | 1982-03-12 | Magnetic recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57039814A JPS58158065A (en) | 1982-03-12 | 1982-03-12 | Magnetic recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58158065A true JPS58158065A (en) | 1983-09-20 |
Family
ID=12563434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57039814A Pending JPS58158065A (en) | 1982-03-12 | 1982-03-12 | Magnetic recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58158065A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63317951A (en) * | 1987-06-19 | 1988-12-26 | Matsushita Electric Ind Co Ltd | Tape recorder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS567254A (en) * | 1979-06-28 | 1981-01-24 | Victor Co Of Japan Ltd | Tape recorder having automatic program head positioning function |
-
1982
- 1982-03-12 JP JP57039814A patent/JPS58158065A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS567254A (en) * | 1979-06-28 | 1981-01-24 | Victor Co Of Japan Ltd | Tape recorder having automatic program head positioning function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63317951A (en) * | 1987-06-19 | 1988-12-26 | Matsushita Electric Ind Co Ltd | Tape recorder |
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