JPS58198973A - Video tape recorder - Google Patents
Video tape recorderInfo
- Publication number
- JPS58198973A JPS58198973A JP57081939A JP8193982A JPS58198973A JP S58198973 A JPS58198973 A JP S58198973A JP 57081939 A JP57081939 A JP 57081939A JP 8193982 A JP8193982 A JP 8193982A JP S58198973 A JPS58198973 A JP S58198973A
- Authority
- JP
- Japan
- Prior art keywords
- audio
- video
- head
- signal
- recording
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/83—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal
- H04N9/835—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal involving processing of the sound signal
- H04N9/8355—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal involving processing of the sound signal the sound carriers being frequency multiplexed between the luminance carrier and the chrominance carrier
-
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
- G11B5/00813—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
- G11B5/00847—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes on transverse tracks
- G11B5/0086—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes on transverse tracks using cyclically driven heads providing segmented tracks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
- G11B5/00813—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
- G11B5/00878—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes transducing different track configurations or formats on the same tape
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
- G11B5/53—Disposition or mounting of heads on rotating support
- G11B5/531—Disposition of more than one recording or reproducing head on support rotating cyclically around an axis
- G11B5/534—Disposition of more than one recording or reproducing head on support rotating cyclically around an axis inclined relative to the direction of movement of the tape, e.g. for helicoidal scanning
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/782—Television signal recording using magnetic recording on tape
- H04N5/7824—Television signal recording using magnetic recording on tape with rotating magnetic heads
- H04N5/7826—Television signal recording using magnetic recording on tape with rotating magnetic heads involving helical scanning of the magnetic tape
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/7921—Processing of colour television signals in connection with recording for more than one processing mode
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/802—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving processing of the sound signal
Abstract
Description
【発明の詳細な説明】
本発明はビデオテープレコーダに関し、特に長時間録画
のためにテープ走行速度が遅くなることに起因する再生
された音声信号の周波数特性の劣化を防ぐことができる
ビデオテープレコーダを掃ｆｌｙすることを目的とする
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a video tape recorder, and in particular to a video tape recorder that can prevent deterioration of the frequency characteristics of a reproduced audio signal caused by slow tape running speed due to long-term recording. The purpose is to wipe out the fly.
一般に、ビデオテープレコーダ、特に民生用のビデオテ
ープレコーダにおいて、音声信号は磁気テープのテープ
幅方向の端に設けられた音声トラックに高周波バイアス
を重畳して固定した磁気ヘッドにて記録し、再生するよ
うに構成していた。Generally, in video tape recorders, especially consumer video tape recorders, audio signals are recorded and played back using a fixed magnetic head that superimposes a high frequency bias on an audio track provided at the end of the magnetic tape in the tape width direction. It was configured like this.
し２かし、長時間録画のためにテープ走行速度が非常に
遅くなってきたため、再生された音声信号の周波数特性
は悪く不満足なものであった。However, because the tape running speed has become extremely slow due to long-term recording, the frequency characteristics of the reproduced audio signal are poor and unsatisfactory.
本発明はこのような従来の欠点を解消するものであり、
映像信号の記録再生用磁気ヘッドと同様に回転シリンダ
に磁気ヘッドを取付け、この磁気−＼ノドを用いて音声
信号で周波数変調した搬送波を記録再生することにより
、再生される音声信号の高品質化を図ったものである。The present invention solves these conventional drawbacks,
A magnetic head is attached to a rotating cylinder in the same way as a magnetic head for recording and reproducing video signals, and this magnetic head is used to record and reproduce a carrier wave frequency-modulated with an audio signal, thereby improving the quality of the reproduced audio signal. The aim is to
以下、本発明について実施例の図面と共に説明する。第
１図は本発明の一実施例を示しており、図中、１は回転
シリンダであり、ビデオヘッド２ａ、；）ｂおよびオー
ディオヘッド５ａ、５ｂを有している。上記ビデオヘッ
ド２ａ、２ｂは上記［［！１転シリンダ１に１８０度の
位置関係をもって取付けられておりミ一方、上記オーデ
ィオヘッドｓａ、ｓｂは上記回転シリンダ１に１８０度
の位置関係をもち、力・っ上記ビデオヘッド２ａ、２ｂ
と９０変の位置関係をもって取付けられている。The present invention will be described below with reference to drawings of embodiments. FIG. 1 shows an embodiment of the present invention, in which reference numeral 1 denotes a rotating cylinder, which has video heads 2a, ;)b and audio heads 5a, 5b. The video heads 2a and 2b are connected to the [[! On the other hand, the audio heads sa and sb are attached to the rotary cylinder 1 with a 180 degree positional relationship, and the video heads 2a and 2b are attached to the rotation cylinder 1 with a 180 degree positional relationship.
It is installed with a 90 degree positional relationship.
上記回転シリンダ１にはテープガイド１６．１７によっ
て磁気テープ３が１８０度より若干大きい角度で巻き付
けられ、かつ−上記回転シリンダ１の回転軸に対して所
定の角度をもって巻き付けられる。The magnetic tape 3 is wound around the rotary cylinder 1 by tape guides 16, 17 at an angle slightly greater than 180 degrees, and at a predetermined angle with respect to the axis of rotation of the rotary cylinder 1.
このような構成において、いま、上記回転シリンダ１が
図示矢印Ｂ方向に回転するものとすると、上記回転シリ
ンダ１に取付けられたビデオヘッド２ａ、２ｂによって
図示矢印Ａの方向に走行している磁気テープ３に映像信
号が記録され、再生さ１する。そして、長時間記録をし
ている場合、映像信号は第２図および第３図に示したよ
うに磁気テープ３のトラック４に記録される。この時、
ビデオヘッド２ａ、２ｂのへラドギャップのアジマスを
それぞれ１６度としているので、ａｃ録される磁気パタ
ンはビデオヘッド２ａ、２ｂの走行方向にえ１して會６
度傾く。また回転シリンダ１に取付けられたオーディオ
ヘッド５ａ、５ｂは、第１図に示したような位置にあり
、第３図の破線で示したトラック６に接するように取付
は高さを調整している。第３図は、ビデオヘッド２ａ
、２ｂで映像信号を記録したトに重ねて、オーディオ信
号で周θに数変調したキャリアを記録し、回転シリンダ
１が半回転して、もう一方のビデオ大ツド２ａ又は２ｂ
で、前述のように記録した映像信号とオーデ１オ用キャ
リアの一部（トラックの重なった部分）を・映像イハ号
で記録し直しながら記録している様子を示している。In such a configuration, if the rotary cylinder 1 is now rotated in the direction of arrow B in the figure, the magnetic tape traveling in the direction of arrow A by the video heads 2a and 2b attached to the rotary cylinder 1 is A video signal is recorded on 3 and played back 1. When recording for a long time, the video signal is recorded on the track 4 of the magnetic tape 3 as shown in FIGS. 2 and 3. At this time,
Since the azimuth of the head gap of the video heads 2a and 2b is set to 16 degrees, the magnetic pattern to be recorded in AC is aligned with the running direction of the video heads 2a and 2b.
Tilt by a degree. Furthermore, the audio heads 5a and 5b attached to the rotary cylinder 1 are located at the positions shown in FIG. 1, and their mounting heights are adjusted so that they are in contact with the track 6 shown by the broken line in FIG. . FIG. 3 shows the video head 2a.
, 2b, the carrier modulated several times in the frequency θ by the audio signal is recorded, and the rotating cylinder 1 rotates half a rotation, and the other video signal is recorded on the video signal 2a or 2b.
This shows how the video signal recorded as described above and a part of the audio carrier (the part where the tracks overlap) are being re-recorded using the Video Iha number.
次にオーディオ信号の記録再生について述べる。Next, recording and reproducing audio signals will be described.
第６図に示した入力端子７に加えられたオーディオ信号
は増幅器８で増幅され、変調器９で１．３ＭＨｚ に
調整さ′ｊ］た搬送波を周波数変調する。変調器９の出
力はスイッチ回路１０を経て回転トランス１１に加えら
れ、−１転シリンダ１側に伝わってオーディオヘッド５
ａ、５ｂに加えられる。オーディオヘッド６ａ、５ｂの
へラドギャップは、第４図に示すように、それぞれ数１
０度ずつ逆に傾いているので、磁気テープ３には第３図
に示したトラック６に４５度傾いた磁気パタンか記録さ
れる。なお、この時、ビデオ信号と重なった部分で、磁
気パタンの傾きの差が大きくなるようにオーディオヘッ
ド５ａ、５ｂを選んで取付けており、また、オーディオ
用の搬送波を大きなレベルで記録すると、先に記録した
映像信号が消えてしまうので、映像信号の劣化が目立た
ないレベルに選んでいる。−力、再生時には、オーディ
オヘッド５ａ、６ｂで再生された搬送波は回転トランス
１１を、１０す１．搬送波が再生されている側のオーデ
ィオヘッド６ａ、５ｂの出力が得られるようにスイッチ
回路１０で選択されて増幅器１２に加えられる。An audio signal applied to the input terminal 7 shown in FIG. 6 is amplified by an amplifier 8, and a modulator 9 frequency-modulates a carrier wave adjusted to 1.3 MHz. The output of the modulator 9 is applied to the rotary transformer 11 via the switch circuit 10, and is transmitted to the -1 rotation cylinder 1 side and then the audio head 5.
Added to a, 5b. As shown in FIG.
Since the magnetic tape 3 is tilted in the opposite direction by 0 degrees, a magnetic pattern tilted by 45 degrees is recorded on the track 6 shown in FIG. 3 on the magnetic tape 3. At this time, the audio heads 5a and 5b are selected and installed in such a way that the difference in the slope of the magnetic pattern becomes large in the part that overlaps with the video signal, and when the audio carrier wave is recorded at a high level, the first Since the recorded video signal will be erased, the level is selected so that the deterioration of the video signal is not noticeable. - During reproduction, the carrier waves reproduced by the audio heads 5a, 6b pass through the rotary transformer 11, 10 to 1. The carrier wave is selected by the switch circuit 10 and added to the amplifier 12 so that the output of the audio head 6a, 5b on the side where the carrier wave is being reproduced is obtained.
増幅器１２で増幅された搬送波を復調器１３で復調し、
増幅器１４で増幅すれば出力端子１５には入力端ｆ７に
加えたオーディオ信号を得ることができる。再生時には
、オーディオヘッド５ａ、５ｂｄ映像の記録された部分
にも接触しているこ吉になるが、オーディオヘッド５ａ
、５ｂとビデオヘッド２ａ、２ｂのへラドギャップのア
ジマスが大きく異なっているため、再生される映像信号
は城哀し、映ｆ象の側帯波のレベルも低く影響はない。The carrier wave amplified by the amplifier 12 is demodulated by the demodulator 13,
If the signal is amplified by the amplifier 14, the audio signal added to the input terminal f7 can be obtained at the output terminal 15. During playback, Kokichi is also in contact with the recorded portion of the audio head 5a and 5bd video, but the audio head 5a
, 5b and the video heads 2a and 2b, the reproduced video signal is poor and the level of the sideband wave of the image is low and has no effect.
同様にビデオヘッド２ａ、２ｂが再生するオーディオ用
の搬送波のレベルも、搬送波の記録レベルが；几いこと
もあって十分低く無視し得る。この時、オーデ、イオ用
の搬送波は１．３ ＭＨｚ 付近に選ばゎており、ｅｏ
ｏＫＨｚ近辺に選ばれ斧低域変換色信号の帯域から離れ
ており、輝度信号のキャリア（３ＭＨｚ〜６ＭＨｚ ）
からも離れているため、オーディオヘッド６ａ、ｓ
ｂが再生する映像の側帯波のレベルも低く、無視し得る
。。Similarly, the level of the audio carrier wave reproduced by the video heads 2a and 2b is sufficiently low and can be ignored, partly because the recording level of the carrier wave is low. At this time, the carrier waves for ode and io are selected around 1.3 MHz, and eo
The ax low-frequency conversion is selected around 0KHz, which is far from the band of the color signal, and the carrier of the luminance signal (3MHz to 6MHz).
Because it is far away from the audio head 6a, s
The level of sideband waves of the video reproduced by b is also low and can be ignored. .
このようにオーディオ用の搬送波を低域変換色信号の周
波数と輝度信号のキャリア周波数の中間に設定すると、
オーディオヘッドで再生する映像の側帯波レベルが低く
なり、オーディオヘットへの映像信号の影響を小さく抑
えることができる。In this way, if the audio carrier wave is set between the frequency of the low frequency conversion color signal and the carrier frequency of the luminance signal,
The sideband level of the video played back by the audio head is lowered, and the influence of the video signal on the audio head can be suppressed.
また、先に記録した映像信号の減衰が大きくならないよ
うにオーディオ用搬送波の記録レベルを選ぶと、先に記
録した映像信号の減衰が目立たなくなり、映像信りを劣
化なく再生することができる３また、生産時のばらつき
が大きいと映像信号を城−衷させたり、搬送波の記録レ
ベルが低過ぎてオーディオのＳ／Ｎが悪化しまたりする
が、ビデオヘッドに対するオーディオヘッドの高さを異
ならしめて映像のトラックの一部に重ねてオーディオの
搬送波を言己録しているので、搬送波の影響を受け々い
映像信号記録部分が残り、オーディオの搬送波の記録レ
ベルが少々増しても映像が急激に悪化することはなく調
整がし、やすい。映像信号の減衰０．５ ｄＢ程度で、
オーデイオＳ／Ｎはａ ５ｄＢ以１〜、周波数特性は２
０ Ｈｚ〜２０ＫＨｚ の特性を得ることができる。In addition, if the recording level of the audio carrier wave is selected so that the attenuation of the previously recorded video signal is not large, the attenuation of the previously recorded video signal will be less noticeable, and the video quality can be reproduced without deterioration. However, if there are large variations during production, the video signal may become distorted, or the recording level of the carrier wave may be too low, resulting in poor audio S/N. Since the audio carrier wave is recorded over a part of the track, a portion of the video signal that is highly affected by the carrier wave remains, and even if the recording level of the audio carrier wave increases slightly, the video quality deteriorates rapidly. Easy to adjust and easy to adjust. With video signal attenuation of about 0.5 dB,
Audio S/N is a 5dB or more 1~, frequency characteristic is 2
Characteristics from 0 Hz to 20 KHz can be obtained.
以上説明したように本発明によれば、アジマスの異−）
ンたヘッドでオーディオ信号の搬送波を記録するため、
長時間録画のためにテープ走行速度が遅くなることに起
因する音声信号の周波数特性を劣化させることなく再生
することができる。また、イ゛−ディオ信号の搬送波を
低域変換色信号と輝度ｆａｔ ”ｊの中間の周波数に設
定しているので、オーディオヘットが再生する映像の側
帯波レベルを低くしてオーディオヘッドへの映像信号の
影響を小さく抑えることができる。また、オーディオ信
号の記録レベルをビデオヘッドの記録レベルより小さく
設定しているので、オーディオヘッドのビデオ・＼ラド
への影響が小さく、本装置で記録したテープを従来のＶ
ＴＲで再生しても影響が出す、また、テープの端に設け
られた従来の音声トラックにもオーディオ信号を記録し
て用いるならばケ換性も４ｊす、非常に有効なものであ
る。As explained above, according to the present invention, the difference in azimuth
In order to record the carrier wave of the audio signal with the head
It is possible to reproduce the audio signal without deteriorating its frequency characteristics, which is caused by slow tape running speed due to long-time recording. In addition, since the carrier wave of the audio signal is set to a frequency between the low frequency conversion color signal and the luminance fat "j, the sideband level of the video played by the audio head is lowered and the video to the audio head is transmitted to the audio head. The influence of the signal can be kept to a minimum.Also, since the recording level of the audio signal is set lower than the recording level of the video head, the influence of the audio head on the video/rad is small, and the tape recorded with this device is The conventional V
This is very effective, since it has no effect even when played back in TR mode, and it also provides interchangeability if audio signals are recorded and used on conventional audio tracks provided at the end of the tape.
第１図は本発明の、ヒ：デオテープレコーダの一実施例
をｌＪｅすＬ１１転シリンダの構成図、Ｍ２図、第３図
は同ビデオテープレコーダにおける記録パターン図、第
４図は同ビデオテープレコーダのオーディオヘッドのギ
ャップ関係図、第５図は同ビデオテープレコーダの音声
回路のブロック図である。
１・・−・・１１１１転ンリング、２ａ、２ｂ・旧・・
ビデオヘッド、３・・・・・磁気テープ、５ａ、５ｂ・
・川・オーディオヘッド、１６．１７・・・・・テープ
ガイド。
代理人の氏名 弁ｒ！ｌ’ｊ−１中 尾 敏 力 ほか
１名第１図Fig. 1 is a configuration diagram of an L11 transfer cylinder showing an embodiment of the video tape recorder of the present invention, Fig. M2 and Fig. 3 are recording pattern diagrams in the video tape recorder, and Fig. 4 is a diagram of the recording pattern in the same video tape recorder. FIG. 5 is a gap relationship diagram of the audio head of the recorder, and is a block diagram of the audio circuit of the video tape recorder. 1...1111 turn ring, 2a, 2b, old...
Video head, 3...Magnetic tape, 5a, 5b.
・Kawa Audio Head, 16.17...Tape guide. Agent's name Benr! l'j-1 Satoshi Nakao and one other person Figure 1
Claims (1)
ビデオヘッドと、上記回転シリンダに上記ビデオヘッド
とは異なる角度位置に取付けられ、かつ上記ビデオヘッ
ドとはヘッドギャップの傾きが異なるオーディオヘッド
を具備し、上記映像信号の長時間記録再生時に、上記オ
ーディオヘッドでの磁気テープへの記録レベルを前記ビ
デオヘッドでの記録レベルよりも小さく設定して前記ビ
デオヘッドで記録した磁気テープのトララクトに前記ヘ
ッドでオーディオ信号の周波数変調した搬送波信号を重
ねて記録するに際してビデオ信号の減衰鼠が大きくなら
ないようにし、かつ前記オーディオ信号の搬送波の周波
数を映像信号の低域変換色信号の周波数と輝度信号キャ
リア周波数の中間に設定したことを特徴とするビデオテ
ープレコーダ。A video head for long-term recording and playback of video signals attached to a rotating cylinder, and an audio head attached to the rotating cylinder at a different angular position from the video head and having a head gap with a different inclination than the video head. When recording and reproducing the video signal for a long time, the recording level on the magnetic tape with the audio head is set to be lower than the recording level with the video head, and the head is placed on the tract of the magnetic tape recorded with the video head. When recording a frequency-modulated carrier wave signal of an audio signal in an overlapping manner, the attenuation of the video signal is prevented from becoming large, and the frequency of the carrier wave of the audio signal is changed to the frequency of the color signal of the video signal and the frequency of the luminance signal carrier frequency. A videotape recorder characterized in that the setting is set between.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57081939A JPS58198973A (en) | 1982-05-14 | 1982-05-14 | Video tape recorder |
| DE8383101457T DE3382110D1 (en) | 1982-02-22 | 1983-02-16 | VIDEO TAPE RECORDER. |
| EP83101457A EP0087114B1 (en) | 1982-02-22 | 1983-02-16 | Video tape recorder |
| AU11621/83A AU551662B2 (en) | 1982-02-22 | 1983-02-17 | V.t.r. with audio head |
| KR1019830000703A KR860000091B1 (en) | 1982-02-22 | 1983-02-21 | Magnetic tape recorder |
| CA000422032A CA1209251A (en) | 1982-02-22 | 1983-02-21 | Video tape recorder |
| BR8300852A BR8300852A (en) | 1982-02-22 | 1983-02-22 | VIDEO-TAPE RECORDER |
| US07/032,973 US5442451A (en) | 1982-02-22 | 1987-04-02 | Helical scan recording/reproducing device for simultaneously helically recording/reproducing both video and audio signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57081939A JPS58198973A (en) | 1982-05-14 | 1982-05-14 | Video tape recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58198973A true JPS58198973A (en) | 1983-11-19 |
Family
ID=13760454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57081939A Pending JPS58198973A (en) | 1982-02-22 | 1982-05-14 | Video tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58198973A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6045903A (en) * | 1983-08-23 | 1985-03-12 | Victor Co Of Japan Ltd | Multiple magnetic recording system and multiple magnetic recording/reproducing system |
| JPS6054167A (en) * | 1983-09-01 | 1985-03-28 | Hitachi Maxell Ltd | Divalent silver oxide battery |
| JPS61140286A (en) * | 1984-12-12 | 1986-06-27 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing method |
-
1982
- 1982-05-14 JP JP57081939A patent/JPS58198973A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6045903A (en) * | 1983-08-23 | 1985-03-12 | Victor Co Of Japan Ltd | Multiple magnetic recording system and multiple magnetic recording/reproducing system |
| JPH0348562B2 (en) * | 1983-08-23 | 1991-07-24 | Victor Company Of Japan | |
| JPS6054167A (en) * | 1983-09-01 | 1985-03-28 | Hitachi Maxell Ltd | Divalent silver oxide battery |
| JPS61140286A (en) * | 1984-12-12 | 1986-06-27 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing method |
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