JPH053651B2 - - Google Patents
Info
- Publication number
- JPH053651B2 JPH053651B2 JP60205663A JP20566385A JPH053651B2 JP H053651 B2 JPH053651 B2 JP H053651B2 JP 60205663 A JP60205663 A JP 60205663A JP 20566385 A JP20566385 A JP 20566385A JP H053651 B2 JPH053651 B2 JP H053651B2
- Authority
- JP
- Japan
- Prior art keywords
- video
- recording
- head
- playback
- pair
- 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.)
- Expired - Fee Related
Links
- 238000010586 diagram Methods 0.000 description 12
- 238000012544 monitoring process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 3
- 102000003898 interleukin-24 Human genes 0.000 description 3
- 108090000237 interleukin-24 Proteins 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、間欠記録及び間欠再生を主体にし
た監視用長時間VTRに関して、さらに連続記録
及び連続再生を付加した場合のVTRに関するも
のである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a long-time monitoring VTR that mainly uses intermittent recording and intermittent playback, and also relates to a VTR in which continuous recording and continuous playback are added. .
〔従来の技術〕
従来この種の装置として第６図に示すものがあ
つた。図において、磁気テープ１はキヤツプスタ
ンシヤフト２とピンチローラ３に挾まれ、キヤツ
プスタンシヤフト２の回転により磁気テープ１は
一定速度で進められる。モータ駆動回路
（MOTOR DRIVE AMP以下MDAと呼ぶ）７
はキヤツプスタンモーター４に接続されて、
MDA７はキヤツプスタンモーター４を駆動す
る。キヤツプスタンモーター４の回転はベルト６
を介してプーリー５に伝達される。キヤツプスタ
ンシヤフト２には角度センサ８が直結しており、
角度センサ８はキヤツプスタンシヤフト２の回転
角度（回転距離）を検出し角度信号を発生する。
また、キヤツプスタンシヤフト２にはブレーキ９
が設けられており、キヤツプスタンシヤフト２の
回転運動に制動をかける。このブレーキ９には、
一般にフエルトなどが接触するメカブレーキが採
用されている。角度センサ８は位置検出器１０を
介して誤差検出器１１に接続される。また、送り
量設定回路１２は誤差検出器１１に接続される。
位置検出器１０は角度信号を検出し、キヤプスタ
ンシヤフト２の位置（移動量）を検出して位置信
号を発生する。送り量設定回路１２はテープの間
欠送り量を設定し設定移動量信号を発生する。誤
差検出器１１は位置信号と設定移動量信号との差
を検出して誤差信号を発生する。送り量設定回路
１２は間欠駆動信号発生回路１３を介してMDA
７に接続される。また、誤差検出器１１はMDA
７に接続される。間欠駆動信号発生回路１３は設
定移動量信号によりモータ４を間欠的に駆動する
タイミング信号を発生する。[Prior Art] A conventional device of this type is shown in FIG. In the figure, a magnetic tape 1 is held between a capstan shaft 2 and a pinch roller 3, and as the capstan shaft 2 rotates, the magnetic tape 1 is advanced at a constant speed. Motor drive circuit (MOTOR DRIVE AMP hereinafter referred to as MDA) 7
is connected to capstan motor 4,
MDA 7 drives capstan motor 4. The rotation of the capstan motor 4 is caused by the belt 6.
is transmitted to the pulley 5 via. An angle sensor 8 is directly connected to the cap stan shaft 2.
An angle sensor 8 detects the rotation angle (rotation distance) of the capstan shaft 2 and generates an angle signal.
In addition, a brake 9 is installed on the cap stan shaft 2.
is provided to brake the rotational movement of the capstan shaft 2. This brake 9 has
Mechanical brakes that come into contact with felt are generally used. Angle sensor 8 is connected to error detector 11 via position detector 10 . Further, the feed amount setting circuit 12 is connected to the error detector 11.
The position detector 10 detects an angle signal, detects the position (amount of movement) of the capstan shaft 2, and generates a position signal. A feed amount setting circuit 12 sets the intermittent feed amount of the tape and generates a set movement amount signal. The error detector 11 detects the difference between the position signal and the set movement amount signal to generate an error signal. The feed rate setting circuit 12 is connected to the MDA via the intermittent drive signal generation circuit 13.
Connected to 7. Moreover, the error detector 11 is MDA
Connected to 7. The intermittent drive signal generation circuit 13 generates a timing signal for intermittently driving the motor 4 based on the set movement amount signal.
次に、この装置の動作について第７図の動作波
形図に従つて説明する。今、この装置では送り量
設定回路１２で設定された設定移動量信号（第７
図ｄで示すパルスで１〜10パルスが力行、残り11
〜16パルスが制動を指令する）により間欠駆動信
号発生回路１３、MDA７、キヤプスタンモータ
４が駆動される。実際には、MDA７の出力電
圧、すなわち、キヤプスタンモータ４の印加電圧
は第７図ａのようになり、パルス１〜10の期間は
力行動作（キヤプスタンモータ正方向回転）を行
ない、パルス11〜16の期間は制動動作（キヤプス
タンモータ逆方向回転）を行なう。キヤプスタン
モータ４が回転すると、ベルト６、プーリ５によ
つてキヤプスタンシヤフト２が回転し、ピンチロ
ーラ３の押圧作用により磁気テープ１が移動す
る。そのときのテープスピードの状態を第７図ｂ
に示す。また同時に、キヤプスタンシヤフト２が
回転するとこれと一体になつている角度センサ８
が動作する。この代表的なものとして光センサ３
個をフライホイール（図中省略）の円周上に並べ
たものがあり、これらの３個の出力である角度信
号の波形は第７図ｃのように３個の角度信号C1，
C2，C3となる。これらの３個の角度信号をマト
リツクス回路に加えることによつて第７図ｄのよ
うなパルス信号を得ることができ、このパルス信
号の数がキヤツプスタンシヤフト２の移動量を示
すことになる。すなわち、磁気テープ１の位置を
示すことになる。この位置信号は誤差検出器１１
によつて送り量設定回路１２で設定された設定移
動量信号と比較される。ここで、９は制動動作を
確実にするために比較的軽く接触したメカブレー
キである。 Next, the operation of this device will be explained with reference to the operational waveform diagram in FIG. Now, in this device, the set movement amount signal (seventh
With the pulses shown in figure d, 1 to 10 pulses are powering, and the remaining 11
~16 pulses command braking), the intermittent drive signal generation circuit 13, MDA 7, and capstan motor 4 are driven. In reality, the output voltage of the MDA 7, that is, the voltage applied to the capstan motor 4 is as shown in FIG. During the period of pulses 11 to 16, a braking operation (the capstan motor rotates in the opposite direction) is performed. When the capstan motor 4 rotates, the capstan shaft 2 is rotated by the belt 6 and pulley 5, and the magnetic tape 1 is moved by the pressing action of the pinch roller 3. Figure 7b shows the state of the tape speed at that time.
Shown below. At the same time, when the capstan shaft 2 rotates, the angle sensor 8 integrated with the capstan shaft 2 rotates.
works. A typical example of this is the optical sensor 3.
The waveforms of the angle signals that are the outputs of these three are the three angle signals C 1 , C 1 ,
They become C 2 and C 3 . By adding these three angle signals to the matrix circuit, a pulse signal as shown in FIG. 7d can be obtained, and the number of these pulse signals indicates the amount of movement of the capstan shaft 2. That is, it indicates the position of the magnetic tape 1. This position signal is transmitted to the error detector 11
is compared with the set movement amount signal set by the feed amount setting circuit 12. Here, 9 is a mechanical brake that is contacted relatively lightly to ensure braking operation.
また、第７図ｅはドラムパルス発生器（図中省
略）で発生されるパルス（一般にFFパルスと呼
ばれており、ドラムの位相を合わせる基準パルス
である）で、このパルスとビデオヘツド書込パル
ス第７図ｆによつて、図中矢印の位置で書込のタ
イミングを定めている。このタイミングt0より１
フレーム期間（１／30sec）に実際にビデオヘツ
ドかFMビデオ信号を書込むのである。ちようど
第７図ｇのようになる。すなわち、第７図ｇのよ
うな信号が間欠ごと（数secごと）に磁気テープ
１に書き込まれ、順次磁気パターン上に並び、終
局的に第８図に示すように磁気テープ上には連続
記録される。 In addition, Figure 7e shows a pulse (generally called an FF pulse, which is a reference pulse for adjusting the drum phase) generated by a drum pulse generator (not shown), and this pulse and the video head write. The writing timing is determined by the pulse f in FIG. 7 at the position of the arrow in the figure. This timing t 1 from 0
The video head or FM video signal is actually written during the frame period (1/30 sec). It will now look like Figure 7g. That is, signals like the one shown in Figure 7g are written on the magnetic tape 1 intermittently (every few seconds), arranged in sequence on the magnetic pattern, and eventually are continuously recorded on the magnetic tape as shown in Figure 8. be done.
第８図に示す磁気パターン図のように１フレー
ムの記録が終つた後、数sec間テープは静止し、
次に次のフレームを書き込みこれらに隙間ができ
たり重なることがないように書き込み最終的に間
欠的にピツクアツプされたフレーム情報が連続的
に記録される。 As shown in the magnetic pattern diagram in Figure 8, after one frame has been recorded, the tape stands still for several seconds.
Next, the next frame is written so that there are no gaps or overlaps, and finally the frame information that has been picked up intermittently is recorded continuously.
従来の場合、上述の駆動方式はかなり複雑では
あるが間欠記録及び間欠再生を行なうかぎり監視
用VTRとしての目的は達している。
In the conventional case, although the above-mentioned drive system is quite complicated, as long as intermittent recording and intermittent playback are performed, the purpose of the VTR for monitoring has been achieved.
しかしながら監視用VTRの仕様をワンステツ
プ向上させ、緊急時の時間分解能を向上させるた
め間欠記録から連続記録にモードが自動的に切り
換わる必要性が出てくる。又さらに間欠記録した
ものを連続再生することにより飛ばし観ることが
要求される。 However, in order to improve the specifications of surveillance VTRs by one step and improve the time resolution in emergencies, there is a need to automatically switch the mode from intermittent recording to continuous recording. Furthermore, it is required to continuously play back what has been recorded intermittently so that it can be viewed intermittently.
この場合従来方式であると間欠記録，再生時の
テープスピードが第７図ｂのように三角状に変化
しているため連続記録，再生状態と異なつてしま
う。原理的には磁気テープのテープスピードをパ
ルス状に変化させれば良いがこれは現実に具現化
出来ない（キヤツプスタンモーターの立ち上り時
間を瞬時にせねばならなく非現実的である）。従
つて従来の監視用VTRでは間欠記録したテープ
を連続再生したり、連続記録したテープを間欠再
生する場合は磁気テープ上のビデオトラツクを正
確にトレースすることが出来ず画面の一部にノイ
ズが発生するという不完全な再生画像しか得られ
ないという欠点があつた。 In this case, in the conventional system, the tape speed during intermittent recording and reproduction changes in a triangular manner as shown in FIG. 7b, which results in a situation different from continuous recording and reproduction. In principle, it would be possible to change the tape speed of the magnetic tape in a pulsed manner, but this cannot be realized in reality (the startup time of the capstan motor must be instantaneous, which is unrealistic). Therefore, when using conventional surveillance VTRs to continuously play a tape that has been recorded intermittently, or to play back a tape that has been continuously recorded intermittently, the video track on the magnetic tape cannot be accurately traced, and noise may appear on a part of the screen. The drawback was that only incomplete reproduced images could be obtained.
この発明は上記のような問題点を解消するため
になされたもので、間欠記録から連続再生、連続
記録から間欠再生も全く支障なく動作せしめる
VTR装置を得ることを的とする。 This invention was made to solve the above problems, and allows continuous playback from intermittent recording and intermittent playback from continuous recording to operate without any problems.
The aim is to obtain VCR equipment.
この発明に係る監視用のVTRは、回転ドラム
に相対向する２個のビデオヘツドを２組もたせ
て、一方を連続記録再生用、他方を間欠記録再生
用とし間欠記録再生用のヘツド対の一方と他方の
取り付け高さにビデオトラツクピツチだけ段差を
もたせたものである。
A monitoring VTR according to the present invention has two sets of two video heads facing each other on a rotating drum, one for continuous recording and playback, and the other for intermittent recording and playback. The height difference between the mounting height of the one and the other is the same as the video track pitch.
この発明における監視用のVTRは、２組のビ
デオヘツド対を持つことにより連続記録再生モー
ドは一般のVTRと同様の動作をさせ、間欠記録
再生モードは磁気テープを完全に停止せしめ、停
止状態で記録又は再生動作を行なう。
The surveillance VTR of this invention has two pairs of video heads, so that the continuous recording and playback mode operates in the same way as a general VTR, and the intermittent recording and playback mode completely stops the magnetic tape, allowing it to remain in the stopped state. Perform recording or playback operations.
この２つの動作を夫々専用のヘツドで行なうた
めいずれの動作モードの場合も画面にノイズが発
生することなく安定した画質の記録再生画を得る
ことが出来る。 Since these two operations are performed by dedicated heads, it is possible to obtain recorded and reproduced images of stable image quality without generating noise on the screen in either operation mode.
以下、この発明の一実施例を図を用いて説明す
る。尚この実施例の説明において第６図〜第８図
の説明と重複する部分は適宜その説明を省略す
る。
An embodiment of the present invention will be described below with reference to the drawings. In the description of this embodiment, the description of parts that overlap with the description of FIGS. 6 to 8 will be omitted as appropriate.
第１図は本発明の回転ドラムを示す図で回転ビ
デオヘツドＲ，Ｌ，R′，L′の２組のヘツドを具し
ており、Ｒ，Ｌは連続記録再生用、R′，L′は間欠
記録再生用のビデオヘツドである。第２図は上記
ビデオヘツドＲ，Ｌ，R′，L′の詳細取りつけ図を
示すもの、ドラム基準面を基準にしたビデオヘツ
ドの取りつけ高さ（段差）を示す図である。一般
にVTRの場合、通常の記録再生の他にステイル、
スロー、スピードサーチのような特殊再生を行な
うためビデオトラツク巾（58μｍ）よりヘツド巾
の広い（70μｍ，90μｍ）しかもＲ，Ｌの両チヤ
ンネルでアジマス角度及び巾の異なるヘツドを使
用している。 FIG. 1 shows a rotating drum according to the present invention, which is equipped with two sets of rotating video heads R, L, R', and L', R and L are for continuous recording and reproduction, and R' and L' is a video head for intermittent recording and playback. FIG. 2 shows a detailed installation diagram of the video heads R, L, R', and L', and is a diagram showing the installation height (level difference) of the video heads with respect to the drum reference plane. In general, in the case of a VTR, in addition to normal recording and playback, still,
In order to perform special playback such as slow and speed search, the head width is wider (70 .mu.m, 90 .mu.m) than the video track width (58 .mu.m), and heads with different azimuth angles and widths are used for both R and L channels.
第３図は夫々のモードで使用するヘツドを示す
ものである。第４図は夫々のモードで動作する時
のビデオヘツドのトレースする様子を示す図であ
る。第５図は間欠記録又は間欠再生時に本発明の
装置が駆動する動作波形図である。 FIG. 3 shows the heads used in each mode. FIG. 4 is a diagram showing how the video head is traced when operating in each mode. FIG. 5 is an operational waveform diagram when the apparatus of the present invention is driven during intermittent recording or intermittent reproduction.
先ず第１図に示すように独立した４つのヘツド
のうち第２図に示された段差零のビデオヘツド
Ｒ，Ｌによつて一般のVTRと同じように連続記
録、再生動作が行なわれる。これは従来のVTR
の動作と全く同じである。即ち第４図Ａに示すよ
うに記録時はビデオトラツク角度θ（5゜58′）で
夫々のフイールドが記録される。再生時も全く同
じビデオトラツク角度θでトレースされる。ここ
でビデオヘツド巾（70μｍ，90μｍ）がビデオト
ラツク巾（58μｍ）より夫々大きく下端がドラム
基準面で一致しているため12μｍ（70−58），32μ
ｍ（90−58）と隣のフイールドにはみ出してしま
う。しかしながら一般にビデオヘツドにはアジマ
ス角度をもつているため隣接フイールドの妨害は
受けない。従つて巾広ビデオヘツドで記録再生し
ても支障なく動作することが出来る。 First, as shown in FIG. 1, out of four independent heads, video heads R and L with zero step shown in FIG. 2 perform continuous recording and reproducing operations in the same way as in a general VTR. This is a conventional VTR
The operation is exactly the same as that of . That is, as shown in FIG. 4A, during recording, each field is recorded at a video track angle .theta. (5.degree. 58'). During playback, the video is traced at exactly the same video track angle θ. Here, the video head width (70 μm, 90 μm) is larger than the video track width (58 μm), and the lower end coincides with the drum reference plane, so it is 12 μm (70-58) and 32 μm.
m (90-58) and it spills into the adjacent field. However, since the video head generally has an azimuth angle, it is not affected by interference from adjacent fields. Therefore, even when recording and reproducing with a wide video head, the operation can be performed without any problem.
次に第３図Ｄの場合について説明する。ビデオ
ヘツドR′，L′は第２図に示すようにR′に対して
L′はビデオトラツク巾58μだけ高くとりつけてあ
る。ここで第５図に示すように磁気テープを駆動
する。第５図ａはキヤツプスタンモーターの駆動
電圧を示すもので先ず力行期間に駆動電圧が印加
されそのあと制動電圧が加わる。この電圧に従つ
て磁気テープの走行スピードは第５図ｂのように
なる。ここで本発明の間欠動作は従来の第７図の
動作と異なり、磁気テープが走行する前、即ち磁
気テープが停止している位置で１フレーム期間の
ビデオ信号を記録又は再生し、その後磁気テープ
を走行させ移動する。従つて従来のように１フレ
ームのビデオ信号を記録、再生する時の磁気テー
プのテープスピードは気にする必要はなく、先ず
静止状態で１フレームのビデオ信号を記録又は再
生し、その後、次の間欠フレームまでの間にゆつ
くりとテープを進めれば良いことになる。従つて
テープ走行速度の制御は非常に簡単となる。 Next, the case shown in FIG. 3D will be explained. Video heads R' and L' are connected to R' as shown in Figure 2.
L' is mounted higher by the video track width of 58μ. Here, the magnetic tape is driven as shown in FIG. FIG. 5a shows the driving voltage of the capstan motor. First, the driving voltage is applied during the power running period, and then the braking voltage is applied. According to this voltage, the running speed of the magnetic tape becomes as shown in FIG. 5b. Here, the intermittent operation of the present invention is different from the conventional operation shown in FIG. 7, in that before the magnetic tape runs, that is, at a position where the magnetic tape is stopped, a video signal of one frame period is recorded or reproduced, and then the magnetic tape Run and move. Therefore, there is no need to worry about the tape speed of the magnetic tape when recording and reproducing one frame of video signal as in the past; instead, one frame of video signal is first recorded or reproduced in a stationary state, and then the next frame is recorded or reproduced. All you have to do is advance the tape slowly between the intermittent frames. Therefore, controlling the tape running speed becomes very simple.
このようにして間欠記録、再生されるテープ上
のようすを第４図Ｄに示す。第４図Ｄに示すよう
に記録時のビデオトラツク角度θ0（5゜56′）は磁気
テープが停止しているので走行時のθよりわずか
に小さくなる。しかもビデオヘツドL′はR′よりト
ラツク巾58μｍだけ段差をもたせているので、磁
気テープが停止していても第４図Ｄのように順次
夫々のフレームが記録されていく。再生時も全く
同様な原理に従つて再生動作を行なう。 FIG. 4D shows how the tape is recorded and reproduced intermittently in this manner. As shown in FIG. 4D, the video track angle θ 0 (5°56') during recording is slightly smaller than θ when running because the magnetic tape is stopped. Furthermore, since the video head L' is stepped from R' by a track width of 58 μm, each frame is recorded one after another as shown in FIG. 4D even if the magnetic tape is stopped. During reproduction, the reproduction operation is performed according to exactly the same principle.
次に第３図Ｂについて説明する。連続記録で記
録されたテープを間欠再生する場合は、第４図Ｂ
に示すようにθ＝5゜58′で記録した磁気テープを
θ＝5゜56′のビデオトラツク角度でトレースする。
第４図Ｂのように若干記録トラツクよりななめに
トレースするか、ビデオトラツクよりヘツド巾が
広いためほぼ記録されたFM信号をピツクアツプ
することが出来る。この動作は一般のVTRのス
チイル再生に相当するものである。 Next, FIG. 3B will be explained. For intermittent playback of a tape recorded continuously, see Figure 4B.
As shown in Figure 2, a magnetic tape recorded at θ=5°58' is traced at a video track angle of θ=5°56'.
As shown in FIG. 4B, it is possible to trace the track slightly diagonally from the recording track, or because the head width is wider than the video track, it is possible to pick up almost the recorded FM signal. This operation corresponds to the still playback of a general VTR.
次に第３図Ｃについて説明する。間欠記録で記
録されたテープを連続再生する場合は、第４図Ｃ
に示すようにθ0＝5゜56′で記録した磁気テープをθ
＝5゜58′のビデオトラツク角度でトレースする。
第４図Ｃのように若干、記録トラツクよりななめ
にトレースするか、ビデオトラツクよりヘツド巾
が広いためほぼ記録されたFM信号をピツクアツ
プすることが出来る。この動作は第３図Ｂの逆に
相当するものである。 Next, FIG. 3C will be explained. When continuously playing back a tape recorded with intermittent recording, see Figure 4C.
As shown in the figure, a magnetic tape recorded at θ 0 = 5°56′ is
Trace at a video track angle of =5°58'.
As shown in Fig. 4C, it is possible to trace the track slightly diagonally from the recording track, or to pick up almost the recorded FM signal because the head width is wider than the video track. This operation corresponds to the reverse of FIG. 3B.
なお、上記実施例では具体的数値（VHS−
NTSC）を入れて説明したが、この値に限定する
ものではないし、他の方式（VHS−PAL、β、
８ミリ）と互換をとるためには数値は異なつてく
る。本発明のように例えばVHS方式のNTSCと
全く互換をとつて構成すると、本装置で記録した
テープを一般市販のVHS方式VTRで連続再生は
勿論、スチイル、コマ送りスロー再生がノイズレ
スで再生できる。逆に一般市販のVHS方式VTR
で連続記録したテープを本装置で連続再生するこ
とは勿論、間欠再生することもできる。またビデ
オヘツドＲ，Ｌ，R′，L′のとりつけ角度は勿論第
１図に示す70゜に限定するものではない。 In addition, in the above example, specific numerical values (VHS-
NTSC), but it is not limited to this value, and other formats (VHS-PAL, β,
In order to be compatible with 8mm), the numbers will be different. When configured to be completely compatible with, for example, the VHS system NTSC as in the present invention, tapes recorded with this device can be played back not only continuously, but also in still film and frame-by-frame slow playback on a commercially available VHS system VTR without noise. On the other hand, general commercially available VHS system VTR
Not only can this device continuously play back a tape recorded continuously, but it can also play back intermittently. Furthermore, the mounting angles of the video heads R, L, R', and L' are, of course, not limited to the 70° shown in FIG.
以上のようにこの発明によれば、巾広のビデオ
ヘツドを連続動作用、間欠動作用と２組設け、間
欠動作用ヘツドのR′，L′間にトラツク巾の段差を
もたせ、磁気テープ停止状態で記録、再生を行な
うように構成したので、連続記録−連続再生、間
欠記録−間欠再生モードでは記録時と全く同一の
テープパターンをトレースするので画面にノイズ
等が発生することはない。又連続記録−間欠再
生、間欠記録−連続再生モードも従来のノイズレ
スステイルの動作及び全くその逆の動作が利用で
き画面にノイズ等が発生しない。従つて画質に関
して精度の高いものが得られる効果がある。
As described above, according to the present invention, two sets of wide video heads are provided, one for continuous operation and one for intermittent operation, and a step equal to the track width is provided between R' and L' of the intermittent operation heads to stop the magnetic tape. Since recording and playback are performed in the continuous recording/continuous playback and intermittent recording/intermittent playback modes, exactly the same tape pattern as during recording is traced, so no noise or the like is generated on the screen. Also, in the continuous recording-intermittent playback and intermittent recording-continuous playback modes, the conventional noiseless still operation and the exact opposite operation can be used, and no noise or the like is generated on the screen. Therefore, there is an effect that highly accurate image quality can be obtained.
第１図は本発明の回転ドラムの一実施例を示す
構成図、第２図は回転ドラムに設けられるビデオ
ヘツドの一実施例を示す構成図、第３図はモード
と使用ビデオヘツドの対応を示す図、第４図は第
２図に示すビデオヘツドのテープ上の軌跡を示す
図、第５図は本発明のテープ走行駆動及び記録、
再生のタイミングを示す図、第６図は従来の間欠
記録、再生動作を行なう監視用VTRを示す構成
図、第７図は第６図の動作を示す波形図、第８図
は磁気テープの記録状態を示すパターン図であ
る。
なお、図中同一符号は同一又は相当部分を示
す。
Fig. 1 is a block diagram showing an embodiment of the rotating drum of the present invention, Fig. 2 is a block diagram showing an embodiment of the video head installed on the rotating drum, and Fig. 3 shows the correspondence between modes and video heads used. 4 is a diagram showing the trajectory of the video head shown in FIG. 2 on the tape, and FIG. 5 is a diagram showing the tape running drive and recording of the present invention.
Figure 6 shows the configuration of a monitoring VTR that performs conventional intermittent recording and playback operations. Figure 7 is a waveform diagram showing the operation of Figure 6. Figure 8 shows magnetic tape recording. It is a pattern diagram showing a state. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
ツドよりなる第１および第２の２組のビデオヘツ
ド対を設けた磁気記録再生装置において、 前記第１および第２のビデオヘツド対の各ビデ
オヘツドはヘツド幅を磁気テープのビデオトラツ
クピツチより大きくし、かつ、アジマス角および
ヘツド幅を互いに異ならせ、 前記第１のビデオヘツド対の各ビデオヘツドの
端部および前記第２のビデオヘツド対の一方のビ
デオヘツド端部を前記回転ドラムの基準面に対し
て概略等しい高さとし、この高さに前記ビデオト
ラツクピツチの段差を加えて前記第２のビデオヘ
ツド対の他のビデオヘツドの端部とし、 前記第１のビデオヘツド対を用いて連続記録再
生を行なわせ、 前記第２のビデオヘツド対を用いて磁気テープ
の走行を停止させた状態で間欠記録再生を行なわ
せることを特徴とする磁気記録再生装置。[Scope of Claims] 1. A magnetic recording/reproducing device in which two pairs of video heads, first and second, each consisting of two video heads facing each other, are provided on a rotating drum, comprising: Each video head of the pair of video heads has a head width larger than the video track pitch of the magnetic tape, and has different azimuth angles and head widths, and an end portion of each video head of the first pair of video heads and an end portion of each video head of the first pair of video heads and The end of one video head of the second pair of video heads is set at approximately the same height with respect to the reference plane of the rotating drum, and the height difference of the video track pitch is added to this height, and the end of the other of the second video head pair is set to approximately the same height with respect to the reference plane of the rotating drum. The first video head pair is used to perform continuous recording and playback, and the second video head pair is used to perform intermittent recording and playback while the magnetic tape is stopped running. A magnetic recording/reproducing device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60205663A JPS6265225A (en) | 1985-09-17 | 1985-09-17 | Magnetic recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60205663A JPS6265225A (en) | 1985-09-17 | 1985-09-17 | Magnetic recording and reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6265225A JPS6265225A (en) | 1987-03-24 |
| JPH053651B2 true JPH053651B2 (en) | 1993-01-18 |
Family
ID=16510625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60205663A Granted JPS6265225A (en) | 1985-09-17 | 1985-09-17 | Magnetic recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6265225A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2794664B2 (en) * | 1987-09-03 | 1998-09-10 | ソニー株式会社 | Recording device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5317315A (en) * | 1976-07-31 | 1978-02-17 | Sony Corp | Reproducer |
-
1985
- 1985-09-17 JP JP60205663A patent/JPS6265225A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5317315A (en) * | 1976-07-31 | 1978-02-17 | Sony Corp | Reproducer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6265225A (en) | 1987-03-24 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |