JPS60182001A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS60182001A
JPS60182001A JP59038302A JP3830284A JPS60182001A JP S60182001 A JPS60182001 A JP S60182001A JP 59038302 A JP59038302 A JP 59038302A JP 3830284 A JP3830284 A JP 3830284A JP S60182001 A JPS60182001 A JP S60182001A
Authority
JP
Japan
Prior art keywords
magnetic
magnetic heads
heads
head
recorded
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
JP59038302A
Other languages
Japanese (ja)
Inventor
Yasuo Mihashi
三▲はし▼ 康夫
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP59038302A priority Critical patent/JPS60182001A/en
Publication of JPS60182001A publication Critical patent/JPS60182001A/en
Pending legal-status Critical Current

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  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To eliminate mutual interference between a luminance signal and a chrominance signal by operating plural magnetic heads in the order of larger gap in the progressing direction of a magnetic tape so as to record and reproduce >=2 signal bands without crosstalk. CONSTITUTION:The magnetic heads H are moved obliquely against the running of the magnetic tape 2 and trace the magnetic tape 2 obliquely. The magnetic heads Ha, Hb have respectively gaps Ga, Gb and the gaps Ga, Gb are tilted with a prescribed angle oppositely with each other from the orthogonal direction to the turning direction of the magnetic heads H. In reproducing the signal recorded on the magnetic tape by the magnetic heads Ha, Hb respectively, even if a magnetic head Ha traces the track of the other head Hb for example, since the recorded angle is different, the magnetic head Ha cannot almost reproduce a video signal and then the crosstalk is reduced. That is, the reproduced output is decreased remarkably when the angle to the gap is different at recording and reproduction.

Description

【発明の詳細な説明】 〔発明の技術分野〕 この発明は記録密度全土げた磁気記録再生装置に関する
ものである。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetic recording/reproducing device with a full range of recording densities.

〔従来技術〕[Prior art]

従来のVTRの記録方式?、−1!1図、第2図図示第
2図1図は一般にVH8方式と呼はれているVTRのテ
ープ上に記録される周波数分布図であり、輝度f言号は
同期は号の先端(シンフチラグ)が、3.4MHz、白
信号の先頭値(ホワイトビーク)が4 、4MH2とな
るようにFM変調さね、一方色1言号は629KHz 
(正確にけ629.:yyo56KH2)の低域周波数
に変換され、この低域変換色信号を低いレベルで輝度1
言号に混合重畳して第2図に示すように磁気テープ上に
記録さノする。このとき、低域変換色1言号けFM変調
された輝度信号成分のエネルギーと相関関係にある変換
周波数に選定されている。
Conventional VTR recording method? , -1!1 Figure 2 Figure 2 Figure 1 is a frequency distribution diagram recorded on the tape of a VTR generally called the VH8 system. (Shin edge lag) is 3.4 MHz, and the first value of the white signal (white beak) is FM modulated so that it is 4,4 MHz, while the color 1 word is 629 kHz.
(To be exact, 629.:yyo56KH2) is converted to a low frequency of
The words are mixed and superimposed and recorded on a magnetic tape as shown in FIG. At this time, the conversion frequency is selected to have a correlation with the energy of the FM-modulated luminance signal component for one word of the low-pass conversion color.

また、一般に磁気テープは20/1の厚さを持ち、その
うち4.メが磁性体で、この磁性体の表面(約0.5声
)に上述のFM輝度信号と低域変換色1言号が記録され
る。
Generally, magnetic tape has a thickness of 20/1, of which 4. The main part is a magnetic material, and the above-mentioned FM luminance signal and one word of low frequency conversion color are recorded on the surface of this magnetic material (approximately 0.5 tones).

このように従来のVTRでは輝度旧号と色1a号?車青
して1組のビデオヘッドで記@する^、FM変調(JI
jlL度)とAM旧け(色)という利点は生かしティる
もののFM変調波の下側波帯と色1ぎりの−L側がぶつ
かり(約1M〜1.5MH2)互いに干渉してビート全
発生し、画像(r−損なうのが常であった。
In this way, with conventional VTRs, brightness old issue and color 1a issue? The car is blue and recorded with one set of video heads, FM modulation (JI
Although the advantages of the old AM (color) and the lower side wave band of the FM modulated wave collide with each other (approximately 1M to 1.5MH2), the entire beat is generated. , images (r-) were used to be damaged.

この欠点?解消する為、テープとヘッドσ)相対速IJ
j ?あげたり、テープの消費1?多くすることが考え
らねるデバ、fjiJ者はドラム径のshh大、後者は
ランニングコストの問題で大きな幣害となっていた。
This drawback? To solve the problem, the tape and head σ) relative speed IJ
j? Give it away or consume 1 tape? The fjij type had a drum diameter of shh, and the latter had a big problem with running costs, which was a huge loss.

〔発I]の)a要〕[Departure I])a essential]

この発す1は−1−記のような従来のものの欠点を除去
するためになさt′またもので、ロータリトランスの構
造全改良するとともに、磁気ヘッドのギャップ「1〕の
差とアジマス角度の特性全利用し、従来の幣害全解消す
ることが可能な品密度記録方式ケ提供するものである。
This output 1 was created in order to eliminate the drawbacks of the conventional ones as described in -1-, and it completely improved the structure of the rotary transformer, as well as the characteristics of the difference in the gap "1" and the azimuth angle of the magnetic head. The present invention provides a product density recording system that can be used to completely eliminate all the conventional bank damage.

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

第3図はこの発明の一実施例である回転ドラム方式を示
す概要図で、面速度(例えばl 、 800 r、p、
m、)で回転される回転ドラム1の円周上には複数の磁
気ヘッドHが設けられており、これらの磁気ヘッドHに
それぞれ180°の角度全もった一対の磁気ヘッドH1
a−H1b、 H2a−H2bお工びH3a−H3b 
iCLつて構成されている。(以下、一対のヘッドにM
l。
FIG. 3 is a schematic diagram showing a rotating drum system which is an embodiment of the present invention.
A plurality of magnetic heads H are provided on the circumference of a rotary drum 1 rotated by a rotary drum 1, and each of these magnetic heads H has a pair of magnetic heads H1 having an angle of 180°.
a-H1b, H2a-H2b work H3a-H3b
It consists of iCL. (Hereinafter, M for a pair of heads.
l.

H2,Ha、180°内の組ヘッドflHa、Ht)と
称も)また、回転ドラムlの円周上には磁気テープ2が
Ω型に巻付けらね、キヤプスタン(3)お工びピンチロ
ーラ4に工って走行させられる。このとき、磁気へッド
HVi第4図に示すように、磁気テープ2の走行方向に
対して斜め方向に移幼し、磁気テープ2全斜め方向にト
レースすることになる。なお、回転ドラム1の下部Kl
−jスリット5を隔てて固定ドラム6が設けられている
。ところで、磁気ヘッドHa−Hbは第5図に示す工う
に1それぞれギャップGa−Gbを有しており、このギ
ャップGa−Gbは磁気ヘッドHの回転方向に対する直
角方向からそれぞ9反対方向に一定角度に′hをアジマ
ス角度という。)だけ傾いている。
Also, the magnetic tape 2 is wound in an Ω-shape on the circumference of the rotating drum l, and the capstan (3) is a pinch roller. 4 and run it. At this time, as shown in FIG. 4, the magnetic head HVi moves obliquely to the running direction of the magnetic tape 2, and traces the entire magnetic tape 2 in an oblique direction. In addition, the lower part Kl of the rotating drum 1
-j A fixed drum 6 is provided across the slit 5. By the way, the magnetic heads Ha-Hb have gaps Ga-Gb in each direction shown in FIG. The angle 'h' is called the azimuth angle. ) is only tilted.

このため磁気テープに記録さhた1a号紮そ11それ峠
シ気ヘッドHa−Hbにより再生する場合、磁気ヘッド
、たとえばHaが曲の磁気ヘッドHbによるトラックを
トレースしても、記録したときの角既が異なるため、I
よとんどビデ第1a号を再生することができず(このと
きの(H矢金アジマス損失という。)、そのためクロス
トークを小さくすることができる。
For this reason, when playing back a piece of music recorded on a magnetic tape using the magnetic head Ha-Hb, even if the magnetic head, for example Ha, traces the track of the song by the magnetic head Hb, the Since the angles are different, I
It is not possible to regenerate bidet No. 1a (at this time (referred to as H arrow azimuth loss)), so crosstalk can be reduced.

即ち、ギヤラフ角度が記録時と再生時とで異なると再生
出力が大巾に減少するのである。このアジマス損失はト
ラック巾fW、アジマス角Mlθとすると、下式で表わ
せる。
That is, if the gear rough angle differs between recording and reproduction, the reproduction output will be significantly reduced. This azimuth loss can be expressed by the following formula, where the track width is fW and the azimuth angle is Mlθ.

但し、λ:テープの記録波長 具体例として、アジマス角/f’tH1μ、H1t)i
、16°、)(2a、 )J2bけ30’、Hsa、 
H3b n 60’とすると、アジマス損失は第6図に
示すようになる。
However, λ: Recording wavelength of tape As a specific example, azimuth angle/f'tH1μ, H1t)i
, 16°, ) (2a, ) J2b ke 30', Hsa,
If H3b n 60', the azimuth loss will be as shown in FIG.

即ち、3つの磁気ヘッドでそねぞね記録再生する11g
号は互いにアジヤス角度が異なる為、重畳さハて記録さ
第7ていても、再生時には自分の磁気ヘッドで記録さh
た信号ケ大きくピックアップでき、他の磁気ヘッドで記
録さtまた1gす°を大巾に減衰させることが可能であ
ることを意味する。
In other words, 11g is recorded and reproduced by three magnetic heads.
Since the azimuth angles of the numbers are different from each other, even if the numbers are superimposed and recorded, it will be recorded with your own magnetic head when playing back.
This means that it is possible to pick up large amounts of signals recorded by other magnetic heads, and it is possible to greatly attenuate signals recorded by other magnetic heads.

第7図はドラム部の具体的構造ケ示すもので、6個のI
+fl気ヘッドHに回転ドラム1の外周に収付けらね、
この回転ドラム1けフランジ11ケ介して回転シャツ)
 12に収付けらねる。また、フランジ11には一ヒ8
150−タリトランス13が口又付けられ、−力、固定
ドラム6の内部にはF部ロータリトランス14が上筒5
0−タリトランス13と30ミクロン程度の間隔を有し
て固定され、上部ロータリトランス13の回転によって
両者間で1a号ケ伝達するように構成される。これらの
トランス13゜14にほぼ同一形状に形成さねており、
トランス13の詳利l (r−娼8図に示している。図
において、Fl状のフェライトコア材に磁気ヘラ)’H
1−)T2・Haに相当する一対の環状溝13a 43
b−13cとこハら間を仕切る溝13d、13θとが設
けらハ、溝13a13b−13c内には数ターンの巻線
13f・13g・13hが、また、溝13d−13θ内
には薄い銅片KLるシールド’) ンク131・13j
が挿入さtq iいる。なお、そハぞねのff/# l
va・1sb・13c VCij K通孔13kが設け
られ、リードnI!を引き出すように構成さねている。
Figure 7 shows the specific structure of the drum section, with six I
+fl is not placed on the outer periphery of the rotating drum 1 in the head H,
Rotating shirt through 1 rotating drum and 11 flanges)
It will be settled on 12. In addition, the flange 11 has one
150 - A rotary transformer 13 is attached to the upper cylinder 5, and an F section rotary transformer 14 is installed inside the fixed drum 6.
It is fixed to the 0-rotary transformer 13 with a gap of about 30 microns, and is configured to transmit No. 1a between them by rotation of the upper rotary transformer 13. These transformers 13° and 14 are formed in almost the same shape,
Details of the transformer 13
1-) A pair of annular grooves 13a 43 corresponding to T2/Ha
Grooves 13d and 13θ are provided to separate the space between b-13c and the grooves 13a and 13b. KL Shield') Nk131・13j
is inserted. In addition, Sohazone's ff/#l
va/1sb/13c VCij K through hole 13k is provided, lead nI! It is designed to bring out the following.

ここ″で、巻線13ft+?19図にボすような低域変
侠カラー信り′ケ、巻線”’g K FM l、i W
 y2換叶声信号を、善報13hにFM龍号変換輝度1
g号會但当させる。
At this point, the winding is 13ft+?
Convert Y2 voice signal to Good News 13h with FM Ryugo brightness 1
I will be in charge of the G meeting.

このトキ、ロータリトランス内にisいては、」ニドの
シールドリング131・13jが対向して3つの1g号
のクロストーク成分のhfi路を断つため、そねぞねの
1d号におけるクロストーク妨害全皆無とすることがで
専る。
In this case, the shield rings 131 and 13j of the shield rings 131 and 13j face each other to cut off the HFI path of the crosstalk components of the three No. 1g, so all the crosstalk interference in the No. 1d of the Sonezone is eliminated. I concentrate on eliminating all of them.

捷π、巻線13f・13g・13hをそねぞれ磁気ヘッ
ドH1・H2・H3に接続するとともに、磁気ヘッドH
を回転方向に対してHla・H2a・H3a−Hlb−
T(2b−H3bの順に配置し、さらに磁気ヘッドエ(
l−H2・H3のそhぞねの厖ヤップ巾G1・G2・G
3全Gl > G2 > G、3となる工すに選択する
。なお、ギャップlJGとデープーヒテープ進行方向に
対して担当する周液数の低い磁夕(ヘッドH1−H2・
H3から並べ、そハそハのヘッドにおける最適記録電流
ゲ選足して記録動作を行なわせると、第1O図に示す工
つに磁性体の厚さ方向に対してギヤツブ中太の磁気ヘッ
ドH1で記録さねる磁化は深く大きい。また、ギャップ
中中の磁気へラドH2で記録される磁化は中庸であり、
ギャップ1J小の磁気ヘッドH3では伶〈表面にのみ小
さく磁化される。しかも、ギャップ中の大きい磁気ヘッ
ド力)ら順次16化さねるため、後者の固気ヘッドで1
11者の記録が乱さねて消滅することはない。即ち、ギ
ャップ中の大きい磁気ヘッドで磁化さねた成分は順次深
層部に残ることになり、再生する揚台、そねぞねの磁気
ヘッドHで記録さねた1百号が大きくピックアップされ
、他の磁気ヘッドで記録′された18号は極端に減衰す
ることになる。
Connect the windings 13f, 13g, and 13h to the magnetic heads H1, H2, and H3, respectively, and connect the magnetic head H
Hla・H2a・H3a−Hlb− in the direction of rotation
T(2b-H3b), and then magnetic head E(
l-H2/H3 width G1/G2/G
3 Select the construction where all Gl > G2 > G, 3. In addition, magnetic poles with a low number of circumferential fluids (heads H1-H2,
By arranging the heads from H3 and performing a recording operation by selecting the optimum recording current for each head, the magnetic head H1 with a medium-thick gear in the direction of the thickness of the magnetic material has the structure shown in Fig. 1O. The recorded magnetization is deep and large. In addition, the magnetization recorded by the magnetic herad H2 in the gap is moderate;
In the magnetic head H3 with a small gap of 1J, only the surface is slightly magnetized. Moreover, since the large magnetic head force in the gap is gradually converted to 16, the latter solid air head is
The records of the 11 people will not be destroyed without being disturbed. In other words, the components that were not magnetized by the large magnetic head in the gap will remain in the deep layer, and the number 100 that was not recorded by the magnetic head H on the reproducing platform will be greatly picked up. No. 18 recorded with other magnetic heads will be extremely attenuated.

井た、上述したように磁気ヘッドH1・H2・H3はア
ジマス角度が異なっているため、アジマス損失によるク
ロストークの減衰も加算され、品質の工いIH号を再生
することができる。
In addition, since the magnetic heads H1, H2, and H3 have different azimuth angles as described above, crosstalk attenuation due to azimuth loss is also added, making it possible to reproduce the IH signal with improved quality.

このようにアジマス記録方式と深層記録方式とを併用す
ることによって磁気テープ2−ヒの磁性体で生じるそれ
ぞねのは号のストローク成分全除去することができ、士
’t、VTR本体側ではドラムのロータリトランス内に
そhぞ育の1言号ケ担当する傍線13f・13H・13
h間にシールドリング131・13jを設けることに工
ってロータリトランス内のクロストークを減らすことが
できる。さらに、そtlそねの磁気ヘッドHに回転ドラ
ムl上に分離して設けられているため、磁気ヘッドH間
におけるクロストークも除去することができる。
In this way, by using the azimuth recording method and the deep recording method in combination, it is possible to completely remove the stroke components of each number generated in the magnetic material of the magnetic tape 2-1. Side lines 13F, 13H, and 13 are in charge of one word of "Sohzoiku" in the rotary transformer of the drum.
Crosstalk within the rotary transformer can be reduced by providing shield rings 131 and 13j between h. Furthermore, since the magnetic heads H are provided separately on the rotating drum l, crosstalk between the magnetic heads H can also be eliminated.

思−ヒのように輝I¥1君号と電信り・間・のピート妨
害を完全に収り除くことが可能となり、しかも、音声1
g号ケ同様に処理することもできることになる。
It is now possible to completely eliminate the interference between Teru I ¥ 1 Kimi and the telegram, and the voice 1
This means that it can also be processed in the same way as No. g.

なお、上述の実施例においては、磁気ヘッドを3組に選
んで説明したが、この発り1はこねに限定されるもので
なく、2組以上の磁気ヘッドを用いてそれぞねの旧号に
rrlぼ最大の出力がピックアップ出来る工うに最適記
録屯流會選べば、同様に゛実施すること力2できる。
In the above embodiment, three sets of magnetic heads were selected for explanation, but this invention is not limited to kneading. If you choose the optimal recording flow system so that the maximum output can be picked up, you can do the same thing.

また、磁気テープの磁性体の厚さは現在のものけ約4μ
であるが、こねを増すことによりC呆1曽d己録による
タロストーク削減効果を増すことも可能である。
In addition, the thickness of the magnetic material in magnetic tape is about 4 μm compared to the current thickness.
However, by increasing the amount of kneading, it is also possible to increase the Talostalk reduction effect of C.

〔発明の効果〕〔Effect of the invention〕

ることができる之め、輝度1言号と色1呂号の相互干渉
ケ収り除くことができ、この発り]の実用価11IMは
大である。
Since it is possible to eliminate the mutual interference between the luminance level 1 and the color level 1, the practical value of this invention is great.

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

第1図は従来のVTRのテープ上に記録される周波級分
布′ff承す概要図、第2図は従来のVTRの回転ヘッ
ドが磁気テープを擢#していく様子を示す図、第3図〜
第10図はこの発明の一笑確例を示すもので、第3図は
VTRの回転ドラム方式ケ示す図、第4図はVTRのヘ
リカルスキャン方式を示す図、第5図はアジマス方式全
説明するための図、第6図はアジマス損失量ケ示す図、
第7図はドラム部ケ承す分解斜視図、第8図はロータリ
ートランスの平面図及び断面図、第9図はテープ−にに
記録さねる周波数分布図、第10図は回転ヘッドが瞠気
テーフー?fm前し劇録していく様子會ボす図である。 図中、Hは磁気ヘッド、ITri回転ドラム、2け磁気
テープ、6は回転ドラム、13け一ヒ部ロータリトラン
ス、13a・13b−13c 13d13eは環状溝、
13f・13Ft、・13hは巻線、131・13jけ
シールドリングである。 なお、図中、同一符号は同一あるいは相当する部分ケ示
すものとする。 代理人 大岩増雄 第1図 第2図 第3図 Lノラム 第5図 第71′l!′I
Figure 1 is a schematic diagram showing the frequency distribution recorded on the tape of a conventional VTR, Figure 2 is a diagram showing how the rotary head of a conventional VTR moves the magnetic tape, and Figure 3 figure~
Fig. 10 shows a concrete example of this invention, Fig. 3 shows a rotating drum system of a VTR, Fig. 4 shows a helical scan system of a VTR, and Fig. 5 fully explains the azimuth system. Figure 6 is a diagram showing the amount of azimuth loss,
Fig. 7 is an exploded perspective view of the drum unit, Fig. 8 is a plan view and cross-sectional view of the rotary transformer, Fig. 9 is a frequency distribution diagram recorded on the tape, and Fig. 10 is a diagram of the rotating head. Tehu? This is a picture of a meeting being recorded before FM. In the figure, H is a magnetic head, ITri rotating drum, 2-piece magnetic tape, 6 is a rotating drum, 13 pieces are a rotary transformer, 13a, 13b-13c, 13d13e are annular grooves,
13f, 13Ft, and 13h are windings, and 131 and 13j are shield rings. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Masuo Oiwa Figure 1 Figure 2 Figure 3 L Noram Figure 5 71'l! 'I

Claims (1)

【特許請求の範囲】 11) ギヤツブ巾とアジマス角度の異なる複数の磁気
ヘッド、これらの磁気ヘッドを円周上に分離して保持す
る回転ドラム、上記磁気ヘッドのそれぞ台に異なる周波
数考の信号を供給する複数の巻111jiヲ有し、上記
回転ドラム側と固定側にそねそれ複数の巻線全対向配置
してなるロークリトランス全備え、上記複数の磁気ヘッ
ドを磁気チー1の進行方向に対してギヤツブ巾の大きい
順に動作させるようにしたこと全特徴どする磁気記録再
生装置。 (2) ロータリトランスの巻線を複数の環状溝内に配
lftするようにしたことを特徴とする特許請求の範囲
第1項記載の磁気記録再生装置。 (3) ロータリトランスは複数の巻線間を仕切るシー
ルドリングを有することを特徴とする特許請求の範囲第
2項記載の磁気記録再生装置。
[Claims] 11) A plurality of magnetic heads with different gear widths and azimuth angles, a rotating drum that holds these magnetic heads separated on the circumference, and signals of different frequency considerations on each of the magnetic heads. It has a plurality of windings 111ji which supply the above-mentioned rotating drum side and a stationary side, and is fully equipped with a low retransformer consisting of a plurality of windings all arranged opposite to each other on the above-mentioned rotating drum side and fixed side, and the above-mentioned plurality of magnetic heads are moved in the direction of movement of the magnetic head 1. A magnetic recording and reproducing device characterized in that the gears are operated in descending order of gear width. (2) The magnetic recording and reproducing device according to claim 1, wherein the windings of the rotary transformer are arranged in a plurality of annular grooves. (3) The magnetic recording and reproducing apparatus according to claim 2, wherein the rotary transformer has a shield ring that partitions a plurality of windings.
JP59038302A 1984-02-28 1984-02-28 Magnetic recording and reproducing device Pending JPS60182001A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59038302A JPS60182001A (en) 1984-02-28 1984-02-28 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59038302A JPS60182001A (en) 1984-02-28 1984-02-28 Magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS60182001A true JPS60182001A (en) 1985-09-17

Family

ID=12521504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59038302A Pending JPS60182001A (en) 1984-02-28 1984-02-28 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS60182001A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6115217A (en) * 1998-09-10 2000-09-05 Storage Technology Corporation Multi-element read/write tape head with low feedthrough

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5180203A (en) * 1975-01-10 1976-07-13 Tokyo Shibaura Electric Co JIKIKIROKU SAISEISOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5180203A (en) * 1975-01-10 1976-07-13 Tokyo Shibaura Electric Co JIKIKIROKU SAISEISOCHI

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6115217A (en) * 1998-09-10 2000-09-05 Storage Technology Corporation Multi-element read/write tape head with low feedthrough

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