JPS58199404A - Video tape recorder - Google Patents
Video tape recorderInfo
- Publication number
- JPS58199404A JPS58199404A JP57081938A JP8193882A JPS58199404A JP S58199404 A JPS58199404 A JP S58199404A JP 57081938 A JP57081938 A JP 57081938A JP 8193882 A JP8193882 A JP 8193882A JP S58199404 A JPS58199404 A JP S58199404A
- Authority
- JP
- Japan
- Prior art keywords
- audio
- video
- head
- recording
- 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
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
- H04N9/7921—Processing of colour television signals in connection with recording for more than one processing mode
-
- 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
- H04N9/80—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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
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葬因する再生
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提供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-time recording. The purpose is to provide a recorder.
一般に、ビデオテープレコーダ、特（民生用のビデオテ
ープレコーダにセいて、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子
を重畳して固定した磁気ヘッドにて記録し、再生するよ
うにし、構成してい冬。しかし、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
次音声信号の周、波数特性ゆ悪く不満なもので１あった
。Generally, in video tape recorders, especially consumer video tape recorders, audio signals are recorded using a fixed magnetic head that superimposes a high-frequency via element on the audio track provided at the end of the magnetic tape in the tape width direction. However, due to the long recording time, the tape running speed became very slow, so the frequency and wave number characteristics of the audio signal that was played back were very unsatisfactory. Ta.
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へツリを取付け１．この−気へ、
ラドを用いて音声信号を記録−生する、ことにモリ、再
生音声の高品質化を図つ、たものである０以下、本発明
について実施例の図面と共綽説明３べ、−−７
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。The present invention solves these conventional drawbacks.
1. A magnetic head is attached to a rotating cylinder in the same way as a magnetic head for recording and reproducing video signals. To this mind,
This invention is intended to record and reproduce audio signals using RAD, especially in order to improve the quality of reproduced audio. do. FIG. 1 shows an embodiment of the present invention, in which:
1 is a rotating cylinder, and a video head 2a.
２ｂ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は上記回転シリンダ
１に１８０度の位置゛関係をもって取付けられており、
一方、上記オーディオヘッド５ａ、６ｂは上記回転シリ
ンダ１に１８０度の位置関係をもち、かつ上記ビデオヘ
ッド２ａ、２ｂと９０度の位置関係をもって取付けられ
ている。上記回転シリンダ１にはテープガイド１６．１
７によって磁気テープ３が１８０度より若干大きい角度
で巻付けられ、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付けられている。2b and audio heads 5a and 5b. The video heads 2a and 2b are attached to the rotary cylinder 1 with a 180 degree positional relationship,
On the other hand, the audio heads 5a, 6b are attached to the rotary cylinder 1 at a positional relationship of 180 degrees, and the video heads 2a, 2b at a positional relationship of 90 degrees. The rotating cylinder 1 has a tape guide 16.1.
7, the magnetic tape 3 is wound at an angle slightly larger than 180 degrees, and at a predetermined angle with respect to the rotation axis 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、再生される。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±６度としているので、記録される磁気パタ
ンはビデオヘッド２ａ 、２ｂの走行方向に対して±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ｓａ、ｓｂ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上に重ねて、オーディオ信号
で周波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、もう一方のビデオヘッド２ｂ（又は２ｂ）
で、前述のように記録した映像信号とオーディオ用キャ
リアの一部（トラックの重なった部分）を映像信号で記
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 video heads 2a and 2b attached to the rotary cylinder 1
A video signal is recorded on the magnetic tape 3 running in the direction of arrow A in the figure and is reproduced. 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 ±6 degrees, the recorded magnetic pattern is ±6 degrees with respect to the running direction of the video heads 2a and 2b.
Tilt by a degree. Furthermore, the audio heads sa and sb attached to the rotary cylinder 1 are located at the positions shown in FIG. 1, and their 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,
A carrier frequency modulated with an audio signal is recorded on top of the video signal recorded in 2b, and the rotating cylinder 1 rotates half a rotation, and the other video head 2b (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 rerecorded as a video signal.
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５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 、３’ＭＨｚに
調整された搬送波を周波数変調する。変調器９６ページ
の出力はスイッチ回路１ｏを経て回転トランス１１に加
えられ、回転シリンダ１側に伝わってオーディオヘッド
ｓａ、ｓｂに加えられる。オーディオヘッドｓａ、ｓｂ
のへラドギャップは、第４図に示すように、それぞれ数
１０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。一方、再生時には、オーディ
オヘッドｅｓａ、６ｂで再生された搬送波は回転トラン
ス１１を通り、搬送波が再生されている側のオーディオ
ヘッド５ａ。An audio signal applied to an input terminal 7 shown in FIG. 5 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 96 is applied to the rotary transformer 11 via the switch circuit 1o, transmitted to the rotary cylinder 1 side, and applied to the audio heads sa and sb. audio head sa, sb
As shown in FIG.
A magnetic pattern tilted by 45 degrees is recorded on track 6 shown in the figure. 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. On the other hand, during reproduction, the carrier wave reproduced by the audio head esa, 6b passes through the rotary transformer 11, and passes through the audio head 5a on the side where the carrier wave is being reproduced.
６ｂの出力が得られるようにスイッチ回路１ｏで選択さ
れて一増幅器１２に加えられる。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１６には入力端子７６ページ
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、５ｂは映像の記録された部
分にも接触していることになるが、オーディオヘッド６
ａ、５ｂとビデオヘッド２ａ。6b is selected by a switch circuit 1o and added to one amplifier 12. If the carrier wave amplified by the amplifier 12 is demodulated by the demodulator 13 and amplified by the amplifier 14, an audio signal added to the input terminal 76 can be obtained at the output terminal 16. During playback, the audio heads 5a and 5b are also in contact with the portion where the video is recorded, but the audio head 6
a, 5b and video head 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減衰し、１．３ＭＨｚｆｔ
近の映像の側帯波のレベルも低く、影響はない。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低いこともあって
、十分低く無視し得る。Since the azimuth of the helad gap in 2b is greatly different, the reproduced video signal is attenuated and the frequency is 1.3MHzft.
The level of sideband waves in nearby images is also low and has no effect. Similarly, the level of the audio carrier wave reproduced by the video heads 2a, 2b is sufficiently low and can be ignored, partly because the recording level of the carrier wave is low.
このように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、映像信号
を劣化なく再生できる。また、生産時のばらつきが大き
いと映像信号を減衰させたり、搬送波の記録レベルが低
過すぎてオーディオのＳ／Ｎが悪化ｔたすするが、ビデ
オ−・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
記録しているので、搬送波の影響を受けない映像７ペー
ジ
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ｏ、６ａＢ程度で、オーディ
オＳ／Ｎは５５ａＢ以上、周波数特性を得ることができ
る。In this way, if the recording level of the audio carrier wave is selected so that the attenuation of the previously recorded video signal does not become too large, the attenuation of the previously recorded video signal becomes less noticeable, and the video signal can be reproduced without deterioration. Also, if there are large variations during production, the video signal will be attenuated, or the recording level of the carrier wave will be too low, resulting in poor audio S/N. Since the audio carrier wave is recorded superimposed on part of the video track, there remains a 7-page signal recording portion of the video that is not affected by the carrier wave, and even if the recording level of the audio carrier wave increases slightly, the video will not suddenly change. It doesn't get worse and is easy to adjust. With a video signal attenuation o of about 6 aB, an audio S/N of 55 aB or more and a frequency characteristic 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った
ヘッドでオーディオ信号を記録するため、長時間録画の
だめにテープ走行速度が遅くなるとともに起因する音声
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、オーディオ信号の記録レベルより小さく
しているので、その再生時にオーディオヘッドのビデオ
ヘッドへの影響が小さく、本装置で記録したテープを従
来のビデオテープレコーダ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互換性も有り、非
常に有効なものである。また、ビニ１
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オーディオ信号を記録して
いるので、オーディオ信号に影響されない映像信号部分
が残り、オーディオ信号の記録レベルが多少変化しても
映像信号が急激に悪化することがなくなり、調整もしや
すくなる利点を有するものである。As explained above, according to the present invention, since audio signals are recorded using heads with different azimuths, the audio signals can be reproduced without deterioration of the frequency characteristics caused by slow tape running speed due to long-term recording. can do. In addition, since the recording level is lower than the recording level of the audio signal, the effect of the audio head on the video head during playback is small, and there is no effect even if the tape recorded with this device is played back with a conventional video tape recorder. If the conventional audio track provided at the end of the tape is also used to record audio signals, it is compatible and very effective. In addition, because the height of the audio head relative to the Vinyl 1 audio head is made different and the audio signal is recorded on part of the video track, there remains a portion of the video signal that is not affected by the audio signal, and the recording level of the audio signal may change slightly. This has the advantage that the video signal does not suddenly deteriorate even when the image signal is changed, and adjustment becomes easier.
第１図は本発明のビデオテープレコーダの一実施例を示
す回転シリンダ部の構成図、第２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における音声回路
のブロック図である。
１＠・・・１回転シリンダ、２ａ、２ｂ・・・・拳・ビ
デオヘッド、３・０・・・磁気テープ、５ａ、６ｂ・・
番・・・オーディオヘッド、１６，１７・・・・・テー
プガイド。
代理人の氏名 弁理士 中尾 敏 男 ほか１名１
箇１図
第４図
第５図
１５ ７４ １３ ／？FIG. 1 is a configuration diagram of a rotating cylinder section showing an embodiment of the video tape recorder of the present invention, FIGS. 2 and 3 are recording pattern diagrams in the video tape recorder, and FIG. 4 is an audio recording pattern diagram of the video tape recorder. FIG. 5 is a block diagram of the audio circuit in the video tape recorder. 1@...1 rotation cylinder, 2a, 2b...fist/video head, 3.0...magnetic tape, 5a, 6b...
Number...audio head, 16,17...tape guide. Name of agent Patent attorney Toshio Nakao and 1 other person 1 Figure 4 Figure 5 15 74 13 /?
Claims (1)
ビデオヘッドと、キ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ると共に上記ビデオヘ
ッドとは異なる高さ位置にヤップの傾きが鼻なるオーデ
ィオヘッドを具備し、上記映像信号の長時間記録グ生時
に・上記トディオヘッドでの磁気テープの記録レベルを
前記ビデオヘッドでの記、録レベルよりも小さく設定し
て前記ヒ１デオヘッドで記録した磁気テープのトラック
上に前記オーディオヘッドでオーディす信号を重ねて記
録するに際してビてオ信号の減衰量が大きくならないよ
うにし、かつ前記ビデオヘッドで記録した磁気テープの
トラックの一部に重ねて前記オーディオヘッドでオーデ
ィ、オ信号を記録することを特徴とするビデオテープレ
コーダ。 ２ページ[Scope of Claims] A video head for long-term recording and playback of video signals attached to a rotating cylinder; The recording head is equipped with an audio head with a steep slope, and when recording the video signal for a long time, the recording level of the magnetic tape with the audio head is set to be lower than the recording level with the video head. In order to prevent the amount of attenuation of the audio signal from becoming large when recording the audio signal by the audio head overlappingly on the track of the magnetic tape recorded by the video head, and to A video tape recorder characterized in that the audio head records an audio signal over a part of the track. 2 pages
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57081938A JPS58199404A (en) | 1982-05-14 | 1982-05-14 | Video tape recorder |
| EP83101457A EP0087114B1 (en) | 1982-02-22 | 1983-02-16 | Video tape recorder |
| DE8383101457T DE3382110D1 (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 |
|---|---|---|---|
| JP57081938A JPS58199404A (en) | 1982-05-14 | 1982-05-14 | Video tape recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58199404A true JPS58199404A (en) | 1983-11-19 |
Family
ID=13760424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57081938A Pending JPS58199404A (en) | 1982-02-22 | 1982-05-14 | Video tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58199404A (en) |
-
1982
- 1982-05-14 JP JP57081938A patent/JPS58199404A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR890003197B1 (en) | Method of writting recording | |
| JPS5998307A (en) | Recording and/or playback equipment | |
| JPH0248882A (en) | Recording head for video signal recording and reproducing device | |
| JPH0458228B2 (en) | ||
| JPS58146011A (en) | video tape recorder | |
| JPS58198973A (en) | Video tape recorder | |
| JPH03105702A (en) | Magnetic recording and reproducing device | |
| JPH05910B2 (en) | ||
| JPH0773405A (en) | Magnetic recording / reproducing device | |
| JPH0125128B2 (en) | ||
| JPS5938907A (en) | Video tape recorder | |
| JPS60154359A (en) | Signal recording system | |
| JPS6013306A (en) | Reproducing system of sound signal | |
| JPS58197975A (en) | Video tape recorder | |
| JPH03187011A (en) | Magnetic recording and reproducing device | |
| JPS61121673A (en) | Magnetic recording and reproducing method | |
| JPS6126904A (en) | magnetic recording and reproducing device | |
| JPH0425601B2 (en) | ||
| JPH0250523B2 (en) | ||
| JPH053652B2 (en) | ||
| JPS60119602A (en) | Magnetic recording and reproducing method | |
| JPS60216678A (en) | magnetic recording and reproducing device | |
| JPH052701A (en) | Magnetic recording and reproducing device | |
| JPS61150101A (en) | Magnetic recording and reproducing method | |
| JPS59198580A (en) | Rotary head type magnetic video recording and reproducing device |