JPH0159374U - - Google Patents
Info
- Publication number
- JPH0159374U JPH0159374U JP15491987U JP15491987U JPH0159374U JP H0159374 U JPH0159374 U JP H0159374U JP 15491987 U JP15491987 U JP 15491987U JP 15491987 U JP15491987 U JP 15491987U JP H0159374 U JPH0159374 U JP H0159374U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic tape
- head
- magnetic head
- magnetic
- rotating magnetic
- 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
- 238000001514 detection method Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 3
Description
第1図は本考案のスローモーシヨン再生装置を
示すブロツク図、第2図、第4図、及び第5図は
第1及び第2の回転磁気ヘツドの走査位置と磁気
テープの走行位置との相対関係を示す模式図、第
3図は第1図の各部波形を示すタイミングチヤー
トである。
1……シリンダ、2……磁気テープ、2a,2
b……映像信号トラツク、3,4……回転磁気ヘ
ツド、8……サーボ回路、13……マイクロプロ
セツサ。
FIG. 1 is a block diagram showing the slow motion reproducing apparatus of the present invention, and FIGS. 2, 4, and 5 are relative diagrams of the scanning positions of the first and second rotating magnetic heads and the running position of the magnetic tape. FIG. 3 is a schematic diagram showing the relationship, and a timing chart showing waveforms of various parts in FIG. 1. 1... Cylinder, 2... Magnetic tape, 2a, 2
b...Video signal track, 3, 4...Rotating magnetic head, 8...Servo circuit, 13...Microprocessor.
Claims (1)
ツクのトラツク幅より大なる第1のヘツド幅及び
第1のアジマス角となされ、シリンダに配置され
た第1の回転磁気ヘツドと、前記第1のヘツド幅
より大なる第2のヘツド幅及び前記第1のアジマ
ス角と異なる第2のアジマス角となされ、前記第
1の回転磁気ヘツドから180°の角度を介して
前記シリンダに配置された第2の回転磁気ヘツド
を有する磁気再生機であつて、前記第1及び第2
の回転磁気ヘツドが、前記シリンダに略180°
の角度で巻回されて通常再生時の1/2倍速で連続
走行する磁気テープを交互にヘリカル走査するこ
とにより、前記磁気テープの各映像信号トラツク
から映像信号を再生するスローモーシヨン再生時
において、前記第1の回転磁気ヘツドが前記磁気
テープをヘリカル走査して再生される2フイール
ドの映像信号中の最小エンベロープが、前記第1
の回転磁気ヘツドが前記磁気テープをヘリカル走
査する各走査期間の前半及び後半の何れに存在す
るかを検出する検出部と、前記2フイールドの映
像信号中の最小エンベロープが垂直同期信号の近
傍に最短距離で移動する様に、前記検出部の検出
出力によつて前記磁気テープの走行速度を制御す
る制御部より成ることを特徴とするスローモーシ
ヨン再生装置。 a first rotary magnetic head disposed in a cylinder having a first head width and a first azimuth angle larger than the track width of a video signal track helically recorded on a magnetic tape; a second rotating magnetic head having a larger second head width and a second azimuth angle different from the first azimuth angle and disposed in the cylinder at an angle of 180° from the first rotating magnetic head; a magnetic reproducing machine having a head, the first and second heads;
A rotating magnetic head is attached to the cylinder approximately 180°.
During slow motion playback, video signals are played back from each video signal track of the magnetic tape by alternately helical scanning a magnetic tape that is wound at an angle of The minimum envelope in the two-field video signal reproduced by the first rotating magnetic head helically scanning the magnetic tape is determined by the first
a detection unit for detecting whether the rotating magnetic head exists in the first half or the second half of each scanning period in which the magnetic tape is helically scanned; 1. A slow-motion playback device comprising: a control section that controls the traveling speed of the magnetic tape based on the detection output of the detection section so that the magnetic tape moves by a certain distance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15491987U JPH0159374U (en) | 1987-10-09 | 1987-10-09 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15491987U JPH0159374U (en) | 1987-10-09 | 1987-10-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0159374U true JPH0159374U (en) | 1989-04-13 |
Family
ID=31432083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15491987U Pending JPH0159374U (en) | 1987-10-09 | 1987-10-09 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0159374U (en) |
-
1987
- 1987-10-09 JP JP15491987U patent/JPH0159374U/ja active Pending
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