JPS6010985A - Video tape recorder incorporating camera - Google Patents

Video tape recorder incorporating camera

Info

Publication number
JPS6010985A
JPS6010985A JP58118855A JP11885583A JPS6010985A JP S6010985 A JPS6010985 A JP S6010985A JP 58118855 A JP58118855 A JP 58118855A JP 11885583 A JP11885583 A JP 11885583A JP S6010985 A JPS6010985 A JP S6010985A
Authority
JP
Japan
Prior art keywords
signal
circuit
recording
video
camera
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
JP58118855A
Other languages
Japanese (ja)
Inventor
Kunio Iwaibana
岩井花 邦男
Kenji Yaginuma
柳沼 研治
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon Electric Co 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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP58118855A priority Critical patent/JPS6010985A/en
Publication of JPS6010985A publication Critical patent/JPS6010985A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/765Interface circuits between an apparatus for recording and another apparatus

Landscapes

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

Abstract

PURPOSE:To attain the accurate signal recording without being attended with deterioration in a signal and increase in manufacture cost by synchronizing a beginning and an end of a recording operation time of each rotary magnetic head with a synchronizing signal of a video camera. CONSTITUTION:A video signal obtained from a video camera 2 is separated into a luminance signal and a chrominance signal at a signal processing circuit 8, they are fed respectively to an FM modulator 9 and a chrominance signal processing circuit 11 and recorded on a magnetic tape 6 by rotary recording heads 4, 5 via an adder 10 and a recording amplifier 12. A vertical synchronizing signal VD is applied to a drum servo circuit 3b and a capstan servo circuit 13b from a synchronizing signal generating circuit 21 so as to control the revolution of a head drum 3 and a capstan 13. This vertical synchronizing signal VD is the same as the vertical synchronizing signal VD applied to a deflection circuit 15, and then a video signal to be recorded by the rotary magnetic heads 4, 5 has a synchronizing signal corresponding to the beginning and the end of its recording operation time and an accurate signal recording is attained.

Description

【発明の詳細な説明】 技術分野 本発明は、磁気テープをヘッドドラムの半周な越えて巻
付け、一対の回転磁気ヘッドにより信号記録するように
したカメラ一体型ビデオテープレコーダに関する。
TECHNICAL FIELD The present invention relates to a camera-integrated video tape recorder in which a magnetic tape is wound over a half circumference of a head drum, and signals are recorded by a pair of rotating magnetic heads.

背景技術 互いにアンマス角度が異なる2個の同転磁気ヘッドを、
磁気テープに対して傾斜走行(ヘリカルスキャン)させ
て信号の記録又は再生を行なうロータリーヘッドヘリカ
ルスキャン方式ビデオテープレコーダを、ビデオカメラ
に一体化し、録画専用機として構成する場合、テープパ
ターン上での/トラック長が従前の標準記録フォーマッ
トに一致するよう、ヘッドドラムに対するテープ巻付角
度を、従前の7?θ度かう例えば3θθ度の如く、/?
θ度と3≦θ度の間の角度に変更するとともに、ヘッド
ドラムの径をテープ巻付角度に対応して縮径し、さらに
ヘッドドラムに対するテープ非巻付部分での信号の欠落
をおぎなうため、時間軸圧縮記録を採用する等の対策を
施すことにより、従前の標準記録フォーマットをもつビ
デオテープレコーダでの再生が可能であることが知られ
ている。
Background Art Two co-rotating magnetic heads with different unmasking angles,
When a rotary head helical scan type video tape recorder, which records or reproduces signals by moving the magnetic tape at an angle (helical scan), is integrated into a video camera and configured as a recording-only device, the / In order to match the track length with the previous standard recording format, the tape winding angle around the head drum was changed from the previous 7? θ degrees, for example 3θθ degrees, /?
In addition to changing the angle between θ degrees and 3≦θ degrees, the diameter of the head drum is reduced in accordance with the tape winding angle, and furthermore, in order to compensate for signal loss in the part where the tape is not wound around the head drum. It is known that by taking measures such as adopting time axis compression recording, it is possible to playback on a video tape recorder having a conventional standard recording format.

しかし、この種の録画専用ビデオテープレコーダは、回
転磁気ヘッドの取り付は間隔だけ、各回転磁気ヘッドの
記録動作期間に差が生ずる。この場合、従前通り等周期
の垂直同期信号に従って各回転磁気ヘッドの記録動作期
間の始端と終端を指定していたのでは、正確な信号記録
が行なえず、このため従来は、記録動作期間の短い方の
回転磁気ヘッドが記録する信号は、向回転磁気ヘッドの
回転位相差に対応する時間分だけ信号を遅延する遅延線
回路を介して記録するようにしていた。しかして、遅延
線回路による信号の遅延は、信号の劣化な招くものであ
り、また遅延線回路自体高価であるため、製造コストの
上昇につながる等の欠点があった。
However, in this type of recording-only video tape recorder, the recording operation period of each rotary magnetic head differs by the distance between the rotary magnetic heads. In this case, if the start and end of the recording operation period of each rotating magnetic head were specified according to the vertical synchronization signal of equal period as before, accurate signal recording could not be performed. The signal recorded by the other rotating magnetic head was recorded via a delay line circuit that delayed the signal by a time corresponding to the rotational phase difference of the directional rotating magnetic head. However, the signal delay caused by the delay line circuit causes signal deterioration, and the delay line circuit itself is expensive, leading to an increase in manufacturing costs.

発明の開示 本発明は、上記欠点を除去したものであり、所定の回転
位相差を何して取り付けられた一対の回転磁気ヘッドを
用いて磁気記録する際、/周期ごとに周期が変動する垂
直同期信号をつくり、この垂直同期信号にもとづいて各
回転磁気ヘッドの記録動作期間の始端と終端を指定し、
これにより、正確な記録を可能とするとともに、信号劣
化を防ぎ、かつ高価な遅延線回路等を不要としたカメラ
的とする。
DISCLOSURE OF THE INVENTION The present invention eliminates the above-mentioned drawbacks, and when performing magnetic recording using a pair of rotating magnetic heads mounted with a predetermined rotational phase difference, vertical A synchronization signal is created, and based on this vertical synchronization signal, the start and end of the recording operation period of each rotating magnetic head is specified,
This enables accurate recording, prevents signal deterioration, and eliminates the need for expensive delay line circuits, making it similar to a camera.

この目的な達成するため、本発明は、ヘッドドラムに対
して半周な越える角度範囲に亘って巻付けられた磁気テ
ープ上のトラックに、所定の回転位相差な何する一対の
回転磁気ヘッドにより交互r信号を記録するようにした
カメラ一体型ビデオテープレコーダであって、前記一対
の回転磁気へラドの回転位相差にもとづく信号記録動作
期間のずれに応じて被記録映像信号の同期周期なヘッド
ドラムの一回転ごと交互に増加・減少せしめ、ヘッドド
ラムの二回転で7周期となる2種のパルスが交互に連続
するよう発生させ、各回転磁気ヘッドの被記録映像信号
の同期信号を得る同期信号発生回路を設けたことを要旨
とするものである。
To achieve this objective, the present invention provides a pair of rotating magnetic heads with a predetermined rotational phase difference that alternately tracks tracks on a magnetic tape wound over an angular range exceeding half a circle around a head drum. The camera-integrated video tape recorder is configured to record r signals, and the head drum has a synchronization period of the video signal to be recorded according to a difference in the signal recording operation period based on the rotational phase difference of the pair of rotating magnetic discs. A synchronization signal that generates two types of pulses that alternately increase and decrease with each rotation and that correspond to 7 cycles per two rotations of the head drum to obtain a synchronization signal for the recorded video signal of each rotating magnetic head. The gist is that a generating circuit is provided.

本発明によれば回転位相差を何する一対の回転磁気ヘッ
ドを交互に用いて、ヘッドドラムの半周を越える範囲の
磁気テープに信号を記録するに際 1し、回転磁気ヘッ
ドの記録動作期間の違いを、遅延線回路等を用いて補正
するのではなく、/周期ごとに上記回転位相差に対応す
る時間分交互に増加・減少する周期をもつ同期信号をつ
(す、この同期信号を用いて映像信号発生源であるカメ
ラを走査し、各回転磁気ヘッドの動作期間の始端と終端
をカメラの同期信号と同期させること(Cより、従前の
標準記録フォーマットと互換性をもたせつつ対処するこ
とができ、これにより同一周期で位相の異なる2種のパ
ルスを交互に連続して形成した同期信号な発生する同期
信号発生回路を設けるだけで、信号の劣化や製造コスト
の上昇を伴なうことなく、正確な信号記録が可能である
等の優れた効果を奏する。
According to the present invention, when recording signals on a magnetic tape over a range exceeding half the circumference of the head drum by alternately using a pair of rotating magnetic heads having different rotational phases, the following steps are taken: 1. Rather than correcting the difference using a delay line circuit, etc., a synchronization signal with a cycle that alternately increases and decreases by the time corresponding to the above rotational phase difference is used. Scan the camera, which is the source of the video signal, and synchronize the start and end of the operating period of each rotating magnetic head with the camera's synchronization signal. As a result, simply providing a synchronization signal generation circuit that generates a synchronization signal that alternately forms two types of pulses with the same period and different phases will cause signal deterioration and increase in manufacturing costs. It has excellent effects such as being able to record signals accurately without any problems.

発明な実施するための最良の形態 以下、本発明の実施例について、図面を参照して説明す
る。第1図は、本発明のカメラ一体型ビデオテープレコ
ーダの一実施例を示す概略構成図、第2図は、第7図に
示した同期信号発生回路の一実施例を示す回路構成図で
ある。
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an embodiment of the camera-integrated video tape recorder of the present invention, and FIG. 2 is a circuit diagram showing an embodiment of the synchronization signal generation circuit shown in FIG. 7. .

第1図中、ビデオテープレコーダ/は、従来側&−f−
丸りナービデオカメラコが一体化されたAI専用機であ
り、従前の記録・再生両用のビデオテープレコーダに比
較して小径のヘッドドラム3を用いている。また、ヘッ
ドドラム3内には、アジマス角度の異なる一対の回転磁
気ヘラドグ、jが、角度δだけ互いに離間させて取り付
けてあり、ヘッドドラム3に対して半周以上巻付いて添
接走行する磁気テープ乙のトラック上に、交互に/フィ
ールド分ずつ信号な記録する。本実廁例における信号記
録方式としては、ヘッドドラム3に対する磁気テープg
の巻付角度θが、例えば30θ度のように非巻付角度r
(=2π−α)よりもかなり犬に設定した関係上、時間
軸圧縮記録方式を採用している。
In Fig. 1, the video tape recorder/ is the conventional side &-f-
It is an AI-only machine with an integrated rounder video camera, and uses a head drum 3 with a smaller diameter than conventional video tape recorders that can be used for both recording and playback. In addition, a pair of rotating magnetic heladogs, j, having different azimuth angles, are installed in the head drum 3 and are spaced apart from each other by an angle δ, and a magnetic tape that is wound around the head drum 3 for more than half a circumference and runs attached thereto. Record signals alternately/field by field on the second track. In this practical example, the signal recording method is to use a magnetic tape g for the head drum 3.
If the winding angle θ of is 30θ degrees, for example,
(=2π-α), so we adopted a time axis compression recording method.

すなわち、ビデオカメラユの撮像管2aの水平走査周波
数な標準の/ 、、5′、 73グkHzの例えば7.
2倍の7FIFF7kHzと高くすることにより、従来
の2≦2.!本の水平走査線で構成した画面に代え、3
/j本の水平走査線からなる画面が構成される。
That is, the standard horizontal scanning frequency of the image pickup tube 2a of a video camera is /, 5', 73 kHz, for example 7.
By increasing the frequency to 7FIFF, which is twice as high as 7kHz, the conventional 2≦2. ! Instead of a screen composed of horizontal scanning lines of a book, 3
A screen consisting of /j horizontal scanning lines is constructed.

この場合、水平同期周期をHとすれば、回転磁気ヘット
ク、!はj/夕Hの周期で/回転するこトニなるが、こ
の回転磁気ヘッドク、夕が磁気テープ乙に接触している
巻付角度0(−3θθ度)の範囲では1.2t2.5H
の信号が記録されることになり、これにより標準のフォ
ートマットでの再生が可能となるのである。なお、2t
、2.3Hの残りの夕2.6Hの間は、回転磁気ヘラド
グ、!には記録信号が供給されるが、記録すべき磁気チ
ーブにがないため、!λ、jHの開信号は欠如する。し
かし、以下の説明では、回転磁気ヘッドX、tに記録信
号が供給されている間を、それぞれの記録動作期間とし
、上記!r2..tHの期間もこの記録動作期間に含め
るものとする。
In this case, if the horizontal synchronization period is H, then the rotating magnetic head,! The rotating magnetic head rotates with a cycle of J/W/H, but in the range of the winding angle of 0 (-3θθ degrees) where the W of this rotating magnetic head is in contact with the magnetic tape B, the winding angle is 1.2t2.5H.
This allows the signal to be recorded, which allows playback in a standard format. In addition, 2t
, during the remaining 2.3H and 2.6H in the evening, the rotating magnetic Helladog,! is supplied with a recording signal, but there is no magnetic chip to record, so! The open signal of λ, jH is absent. However, in the following explanation, the period during which recording signals are supplied to the rotating magnetic heads X and t will be referred to as the respective recording operation period, and the above! r2. .. The period tH shall also be included in this recording operation period.

しかして、既に述べた通り、2個の回転磁気ヘッドク、
夕は、その取り付は位置が異なるため、δだけ回転位相
がずれており、しかも交互に信号を記録する関係上、各
回転磁気ヘラドグ、jの記録動作期間は、/フィールド
ごとに変動する。すなわち、巻付角度θ、非巻付角度r
、両回転磁気ヘッドtxt、jの回転位相差に対応する
角度δは、それぞれ回転磁気ヘッドク、夕の走行期間T
θ(=、26+2.!H)、 Tr (=、f2. J
” H) 、 Tδに対応するので、一方の回転磁気ヘ
ッド例えばグが、Tθ+Tr+Tδ の間記録動作した
とすれば、他方の回転磁気ヘッド!はTθ+Tr−Tδ
の間記録動作することになる。本発明は、上記記録動作
期間の差に応じて垂直同期信号の周期を補正することに
より、記@動作の同期ずれを防止するのである。
However, as already mentioned, two rotating magnetic heads,
In the evening, since the mounting positions are different, the rotational phase is shifted by δ, and since signals are recorded alternately, the recording operation period of each rotating magnetic heladog, j, varies from field to field. That is, the wrapping angle θ, the non-wrapping angle r
, the angle δ corresponding to the rotational phase difference between the two rotating magnetic heads txt and j is the rotational magnetic head txt and the evening running period T, respectively.
θ(=,26+2.!H), Tr(=,f2.J
”H), corresponds to Tδ, so if one rotating magnetic head, for example, performs a recording operation for Tθ+Tr+Tδ, the other rotating magnetic head! corresponds to Tθ+Tr−Tδ.
The recording operation will continue for a while. The present invention corrects the period of the vertical synchronizing signal according to the difference in recording operation period, thereby preventing synchronization deviation in the recording operation.

以下、カメラ一体型ビデオチーブレコーダ/の構成を、
動作とともに概略説明する。
The configuration of the camera-integrated video recorder is shown below.
An outline will be explained along with the operation.

ビデオカメラコのレンズ2bと撮像管2aを通して得ら
れた映像信号は、アンプ回路7にて増幅されたのち、信
号処理回路ざにて輝度信号と色信号に分離される。分離
された輝度信号は、FM変調回路ワにてFM変調された
あと、加算器1ovc供給され、色信号処理回路/lに
て、低域変換された一色信号に加算される。加算器1o
ycて加算された輝度信号と色信号は、記録アンプ回路
/2にて増幅され、前記回転磁気ヘラドグ、!を介して
磁気チーブ乙に記録される。なお、ヘッドドラム3駆動
用のモータ3aとキャプスタン/3駆動用のモータ/J
aは、それぞれドラムサーボ回路3bとキャブスタンサ
ーボ回路/3bによって回転制御し、回転ムシが発生し
ないようにしである。滓は、ドラムサーボ回路3bに対
して、ヘッドドラム30回転数に応じたパルスを供給す
るためのドラム回転検出用磁気ヘッドである。
A video signal obtained through the lens 2b and image pickup tube 2a of the video camera is amplified by an amplifier circuit 7, and then separated into a luminance signal and a color signal by a signal processing circuit. The separated luminance signal is subjected to FM modulation in the FM modulation circuit W, then supplied to the adder 1ovc, and added to the low-frequency converted one-color signal in the color signal processing circuit /l. Adder 1o
The luminance signal and chrominance signal added by yc are amplified by the recording amplifier circuit/2, and then the rotating magnetic heladog, ! is recorded on the magnetic chip via. In addition, motor 3a for driving the head drum 3 and motor/J for driving the capstan/3.
The rotation of the drum servo circuit a is controlled by a drum servo circuit 3b and a cab stan servo circuit 3b to prevent rotation bugs from occurring. The slag is a drum rotation detection magnetic head for supplying pulses corresponding to the number of rotations of the head drum 30 to the drum servo circuit 3b.

ここで、上記ドラムサーボ回路3bやキャブスタンサー
ボ回路/Jb或いは信号処理回路ざや撮像管2a駆動用
の偏向回路/j等は、同期信号発生回路2/で生成され
た水平又は垂直の同期信号VH。
Here, the drum servo circuit 3b, the cab stan servo circuit /Jb, the signal processing circuit, the deflection circuit /j for driving the image pickup tube 2a, etc. are connected to the horizontal or vertical synchronization signal VH generated by the synchronization signal generation circuit 2/. .

VD を必要としており、この同期信号発生回路、2ノ
を駆動するため、基準信号発生回路16で発生した所定
周波数の基準信号な分周回路/7で分周し、その分周出
力である水平同期信号HDを同期信号発生回路2/に供
給するようにしている。また、信号処理回路とは、同期
信号発生回路ユ/から供給される同期信号vH、VD以
外に、色副搬送波となる信号を必要としており、このた
め基準信号発生回路/lで発生した基準信号を、別の分
周回路/gにて分周し、その分周出力を信号処理回路と
に供給するようにしている。
In order to drive this synchronization signal generation circuit 2, the frequency of the reference signal of a predetermined frequency generated by the reference signal generation circuit 16 is divided by the frequency divider circuit 7, and the horizontal The synchronization signal HD is supplied to the synchronization signal generation circuit 2/. In addition, the signal processing circuit requires a signal that becomes a color subcarrier in addition to the synchronization signals vH and VD supplied from the synchronization signal generation circuit /l, and therefore the reference signal generated by the reference signal generation circuit /l is frequency-divided by another frequency dividing circuit /g, and the frequency-divided output is supplied to the signal processing circuit.

ここで、同期信号発生回路27は、本発明の要部を構成
しており、2個の回転磁気ヘッドg、tの回転位相差に
もとづく記録動作期間の違い疋対処するため、従前のビ
デオチーブレコーダとは異なり、周期が同じで位相の異
なる2種の同期信号が交互に連続するため、周期変動す
る垂直同期信号VDを生成する。すなわち、同期信号発
生回路27は、第2図に示した如(、分周回路/7に接
続され、交互に計数動作する一対の計数回路)2.幻と
、計数回路22と幻の出力な混合する混合回路2U及び
混合回路2グの出力である垂直同期信号VDに分周回路
/7からの水平同期信号HD を混合する混合回路33
とから構成される。
Here, the synchronizing signal generating circuit 27 constitutes a main part of the present invention, and is used in the conventional video chip in order to cope with the difference in the recording operation period based on the rotational phase difference between the two rotating magnetic heads g and t. Unlike a recorder, two types of synchronization signals having the same period and different phases alternately and successively, so that a vertical synchronization signal VD whose period fluctuates is generated. That is, the synchronizing signal generating circuit 27 is composed of a pair of counting circuits connected to the frequency dividing circuit /7 and performing counting operations alternately, as shown in FIG. a mixing circuit 2U that mixes the output of the counting circuit 22 and the phantom output; and a mixing circuit 33 that mixes the horizontal synchronizing signal HD from the frequency dividing circuit/7 with the vertical synchronizing signal VD that is the output of the mixing circuit 2g.
It consists of

計数回路、22(23)は、分周回路/7から供給され
た水平同期信号をそれぞれ所定値に達するまで計数し、
計数値が所定値に達したときに、計数完了信号により他
方の計数回路2.7 (2,2)をリセットするととも
に、自らは計数停止する構成とされている。
The counting circuit 22 (23) counts the horizontal synchronizing signals supplied from the frequency dividing circuit/7 until each reaches a predetermined value,
When the counted value reaches a predetermined value, the other counting circuit 2.7 (2, 2) is reset by the counting completion signal, and the counting circuit itself stops counting.

このため、計数回路22,2.3のそれぞれのリセット
入力端子には、他方の計数回路、υ、22の出力端子が
接続しである。
Therefore, the reset input terminal of each of the counting circuits 22, 2.3 is connected to the output terminal of the other counting circuit, υ, 22.

本実施例の場合、一方の計数回路22は、Tθ十T r
 + Tδの期間に応じた数の水平同期信号HD を計
数したときに計数完了信号を出力し、他方の計数回路2
2は、Tθ十Tr−Tδの期間に応じた数の水平同期信
号1(1)を計数したときに計数完了信号を出力するよ
う設定しである。従って、偏向回路/jは、/フィール
ドごとに周期が異なる垂直同量信号VDす供給されるこ
とてなり、これにより各回転磁気ヘラドグ、J″の被記
録映像信号は磁気ヘラドグ、−tの記録動作期間の始端
と終端に対応した同期信号を何するため、正確な同期に
もとづく信号記録が可能となる。
In the case of this embodiment, one of the counting circuits 22 has Tθ+T r
+ When the number of horizontal synchronizing signals HD corresponding to the period of Tδ is counted, a counting completion signal is output, and the other counting circuit 2
2 is set to output a counting completion signal when a number of horizontal synchronizing signals 1 (1) corresponding to a period of Tθ+Tr−Tδ is counted. Therefore, the deflection circuit /j is supplied with a vertically equal amount signal VD having a period different for each field, so that the recorded video signal of each rotating magnetic heladog, J'' is transmitted to the recording of the magnetic heladog, -t. Since the synchronization signals corresponding to the start and end of the operation period are used, it is possible to record signals based on accurate synchronization.

以上説明したように、上記構成になるビデオチーブレコ
ーダ/は、回転位相差を何する一対の回転磁気ヘッド¥
、jを交互に用いて、ヘッドドラム30半周を越える範
囲の磁気チーブ乙に信号を記録するに際し、回転磁気ヘ
ラドグ、夕の記録動作期間の違いを、遅延線回路等を用
いて補正するのではなく、7周期ごとに上記回転位相差
に対応する時間分交互に増加・減少する周期をもつ同期
信号をつくり、この同期信号を用いて映像信号発生源で
あるビデオカメラコを走査し、各回転磁気ヘラドグ、j
の記録動作期間の始ぢMと終端なピデオカメラコの同期
信号と同期させるよう構成しである。これにより、従前
の標準記録フォーマットと互換性をもたせつつ対処する
ことができ、従って周期が同じで位相の異なるパルスが
交互に連続するように形成された同期信号を発生する同
期信号発生回路2/す設けるだけで、信号の劣化や製造
コストの上昇を伴なうことなく、正確な信号記録が可能
である。
As explained above, the video recorder with the above configuration has a pair of rotating magnetic heads with different rotational phase differences.
, j alternately to record signals on the magnetic head within a range exceeding 30 half-turns of the head drum, the difference in the recording operation period between the rotating magnetic head dog and the evening can be corrected by using a delay line circuit, etc. Instead, we create a synchronization signal with a cycle that alternately increases and decreases by the time corresponding to the rotational phase difference every seven cycles, and uses this synchronization signal to scan the video camera, which is the video signal generation source, and magnetic helladog, j
The configuration is such that the start and end of the recording operation period are synchronized with the synchronization signal of the video camera. As a result, it is possible to deal with this while maintaining compatibility with the previous standard recording format, and therefore, the synchronization signal generation circuit 2/ By simply providing a signal, accurate signal recording is possible without signal deterioration or increase in manufacturing costs.

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

第1図は、本発明のカメラ一体型ビデオチーブレコーダ
の一実施例を示す概略構成図、第β図は、第1図に示し
た同期信号発生回路の一実施例な示す、お構成、アあ、
o ′ /・・・カメラ一体型ビデオチーブレコーダ、2・・・
ビデオカメラ、3・・・ヘッドドラム、り、!・・回転
磁気ヘッド、g・・・磁気テープ、2/・・・同期信号
発生回路。
FIG. 1 is a schematic configuration diagram showing one embodiment of the camera-integrated video recorder of the present invention, and FIG. a,
o ′/...camera integrated video recorder, 2...
Video camera, 3...head drum, ri... ...Rotating magnetic head, g...Magnetic tape, 2/...Synchronizing signal generation circuit.

Claims (1)

【特許請求の範囲】[Claims] ヘッドドラムに対して半周を越える角度範囲に亘って巻
付けられた磁気テープ上のトラックに、所定の回転位相
差を何する一対の回転磁気ヘッドにより交互に信号を記
録するようにしたカメラ一体型ビデオテープレコーダで
あって、前記一対の回転磁気ヘッドの回転位相差にもと
づく信号記録動作期間のずれ圧応じて、同期周期を7周
期ごと交互に増加・減少せしめ、各回転磁気ヘッドの被
記録映像信号の同期信号を得る同期信号発生回路を設け
てなるカメラ一体型ビデオチーブレコーダ0
An integrated camera that uses a pair of rotating magnetic heads with a predetermined rotational phase difference to alternately record signals on tracks on a magnetic tape that is wound around the head drum over an angular range of more than half a circle. In the video tape recorder, the synchronization period is alternately increased or decreased every seven periods in accordance with the deviation pressure of the signal recording operation period based on the rotational phase difference between the pair of rotary magnetic heads, and the recorded video of each rotary magnetic head is Camera-integrated video recorder 0 equipped with a synchronization signal generation circuit for obtaining a synchronization signal
JP58118855A 1983-06-30 1983-06-30 Video tape recorder incorporating camera Pending JPS6010985A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58118855A JPS6010985A (en) 1983-06-30 1983-06-30 Video tape recorder incorporating camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58118855A JPS6010985A (en) 1983-06-30 1983-06-30 Video tape recorder incorporating camera

Publications (1)

Publication Number Publication Date
JPS6010985A true JPS6010985A (en) 1985-01-21

Family

ID=14746803

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58118855A Pending JPS6010985A (en) 1983-06-30 1983-06-30 Video tape recorder incorporating camera

Country Status (1)

Country Link
JP (1) JPS6010985A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019373A (en) * 1983-07-14 1985-01-31 Sony Corp Vtr incorporating with camera
JPS62175076A (en) * 1986-01-28 1987-07-31 Asahi Optical Co Ltd Magnetic recording device for still/movie

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53124409A (en) * 1977-04-07 1978-10-30 Sony Corp Recorder of video signal
JPS58101577A (en) * 1981-12-14 1983-06-16 Victor Co Of Japan Ltd (54)video signal recorder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53124409A (en) * 1977-04-07 1978-10-30 Sony Corp Recorder of video signal
JPS58101577A (en) * 1981-12-14 1983-06-16 Victor Co Of Japan Ltd (54)video signal recorder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019373A (en) * 1983-07-14 1985-01-31 Sony Corp Vtr incorporating with camera
JPS62175076A (en) * 1986-01-28 1987-07-31 Asahi Optical Co Ltd Magnetic recording device for still/movie

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