JPS5883308A - Video tape recorder - Google Patents
Video tape recorderInfo
- Publication number
- JPS5883308A JPS5883308A JP57176146A JP17614682A JPS5883308A JP S5883308 A JPS5883308 A JP S5883308A JP 57176146 A JP57176146 A JP 57176146A JP 17614682 A JP17614682 A JP 17614682A JP S5883308 A JPS5883308 A JP S5883308A
- Authority
- JP
- Japan
- Prior art keywords
- bands
- heads
- screen
- head
- field
- 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
-
- 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
-
- 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
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
- G11B5/027—Analogue recording
- G11B5/035—Equalising
Landscapes
- Television Signal Processing For Recording (AREA)
Abstract
Description
【発明の詳細な説明】
ｖＴ丸においては、方式により、ブラウン管上の画面を
複数部分に分割して、各部分の信号を、磁気テープ上の
別々のビデオトラックに記録、これを再生することが行
われる。たとえば、我国における放送用ＶＴＲ）こおい
ては、一画面（１フレーム）を一本おきの走査線で構成
した２フイールドに分割し、さらに各フィールドを１６
へびンドに分割して、それぞれのバンドを磁気テープ上
の各ビデオトラ、りに記録、再生するという方式をとっ
ている。このとき、磁気へ、ドとしては、回転円板の同
上に等間隔で設けた４箇の磁気ヘッドを用い、画面上で
の各バンドはそれ祭れ、常に同一のへ、ドで受は持つよ
うにしである。したがって、各バンド間の画質の変化、
いわゆるバンディング現象を避けるため、各磁気ヘッド
の記録、再生特性を厳密に一致させなければならず、磁
気ヘッドの製造、ならびに回路調整に多大の負担をかけ
る結果となっている。[Detailed Description of the Invention] In the vT Maru, the screen on the cathode ray tube is divided into multiple parts, and the signals of each part are recorded on separate video tracks on the magnetic tape, and this can be played back. It will be done. For example, in Japan (broadcasting VTR), one screen (one frame) is divided into two fields each consisting of every other scanning line, and each field is further divided into 16
The system is divided into bands, and each band is recorded and played back on each video track on the magnetic tape. At this time, four magnetic heads placed at equal intervals on the same top of the rotating disk are used for the magnetic and C, and each band on the screen is held separately, and the U and C are always held at the same position. That's how it is. Therefore, the change in image quality between each band,
In order to avoid the so-called banding phenomenon, it is necessary to strictly match the recording and reproducing characteristics of each magnetic head, resulting in a heavy burden on manufacturing the magnetic heads and adjusting the circuits.
この発明は、このような問題を解決するためのもので、
画面上の各バンドを、複ａＳのヘッドで交互に受けもた
せるようにしたものである。This invention is intended to solve such problems.
Each band on the screen is alternately supported by multiple aS heads.
実施例
画面°を１本おきの走査線で構成される２フィ′−ルド
に分割し、かつ、各フィールドをさらに２バンドに分割
して、全体で４つのバンド、Ｂｄｌ。Embodiment The screen is divided into two fields each consisting of every other scanning line, and each field is further divided into two bands, resulting in a total of four bands, Bdl.
Ｂｄ２ 、Ｂｄ３ 、Ｂｄ４で構成した。ここで、第一
フィールドはＢ、ｄｉ、Ｂｄ２の２バンド、第２フイー
ルドはＢｄ３ 、Ｂｄ４の２バンドとし、これを、図に
示すように、磁気テープ１上の各ビデオトラック２に記
録し、これを再生する方式とした。It was composed of Bd2, Bd3, and Bd4. Here, the first field has two bands of B, di, and Bd2, and the second field has two bands of Bd3 and Bd4, and these are recorded on each video track 2 on the magnetic tape 1 as shown in the figure. This was the method of playback.
このとき、回転円板の円周上に等間隔で３箇のヘッド、
Ｈ−１，Ｉ（−２，Ｈ−３を取り付け、上記りｄｉ、Ｂ
ｄ２．Ｂｄ３．Ｂｄ４の４バンドを、これら３箇のヘッ
ドでサイクリックに受は持つようにした。なお、各トラ
ック相互間の午渉を防ぐため各ヘッドの作動ギャップの
アジマスを変工、各トラック内における記録パターンを
図の拡大図に示すようにＨ−２を中心に角度を１σだけ
回転させるよう−にした。（θは１０°程度）この結果
、各バンドを受は持つ磁気ヘッドは、表１に示すよう゛
に変化し、各バンドとも、３フレーム走査中に各３へ、
ドが用いられ、さらに、ブラウン管上の巨視的バンドと
いう意味では、ＢｄｌとＢｄ３．Ｂｄ２とＢｄ４は同一
バンドと考えられるから、１フィールド６０−’８で走
査するＶＴＲにおいては、２Ｏ−１８間で、上記巨視的
バンドはＨ−１，Ｈ−２，Ｈ−３の３へ、ドでサイクリ
ックに受持たれることになり、バンドＢｄｌ、Ｂｄ３と
バンドＢｄ２．Ｂｄ４との間のヘッドによる差はたとえ
各へ、ドの特性に差があってもそれぞれ平均化されて人
の眼には、その差が大幅に緩和され、バンディングを防
ぐために要求される各ヘッド特性の均一性も、大幅に緩
和される。At this time, three heads are placed at equal intervals on the circumference of the rotating disk,
Attach H-1, I (-2, H-3, above di, B
d2. Bd3. The four bands of Bd4 were cyclically held by these three heads. In addition, in order to prevent interference between each track, the azimuth of the operating gap of each head is modified, and the recording pattern within each track is rotated by 1σ around H-2 as shown in the enlarged view of the figure. I did it. (θ is about 10 degrees) As a result, the magnetic head that supports each band changes as shown in Table 1, and each band changes to 3 during 3 frame scanning.
In addition, in terms of macroscopic bands on a cathode ray tube, Bdl and Bd3. Since Bd2 and Bd4 are considered to be the same band, in a VTR that scans in one field 60-'8, the macroscopic bands are H-1, H-2, H-3, and Bands Bdl, Bd3, and Bd2. Even if there is a difference in the characteristics of each head, the difference between the heads and Bd4 is averaged out to the human eye, and the difference is greatly alleviated, and the difference between each head required to prevent banding. The uniformity of properties is also significantly relaxed.
第１図ａ）は本発明によるビデオテープレコーダにおけ
る磁気テープ上の記録状況を示す説明図。
第１図ｂ）は前記磁気テープの一部分５の記録、ｆター
ンの拡大図、第１図Ｃ）は前記磁気テープ９一部分６の
記録パター／の拡大図、第１１凶ｄ）は前記磁気テープ
の一部分７の記録パターンの拡大図である。
各図において、ｌは磁気テープ、２はビデオトラック、
３はテープ送り方向、４は磁気ヘッド師転方向、ｓｔ６
および７はそれぞれ磁気テープグ一部分、８は磁気ヘッ
ド回転方向、９は記録磁イ１の濃淡のパタンを示す。
似弁訃薄田利
才／ 図
】
）
巳
１幸−FIG. 1a) is an explanatory diagram showing a recording situation on a magnetic tape in a video tape recorder according to the present invention. FIG. 1 b) is an enlarged view of the recorded f-turn on a portion 5 of the magnetic tape, FIG. FIG. 3 is an enlarged view of a recording pattern of a portion 7 of FIG. In each figure, l is a magnetic tape, 2 is a video track,
3 is the tape feeding direction, 4 is the magnetic head rotation direction, st6
7 and 7 respectively indicate a portion of the magnetic tape, 8 the direction of rotation of the magnetic head, and 9 the pattern of shading of the recording magnet 1. Similar dialect Toshisai Usuda / Figure] ) Miyuki -
Claims (1)
１フイールドおよび第２フイールド）に分割し且つ各フ
ィールドをさらに２バンドに分割Ｑて前記第１フイール
ドはＢｃｉｌとＢｄ２の２バンド、前記第２フイールド
はＢｃ１３とＢｄ４の２バンドとし、上記４バンドを３
個の磁気ヘッド（Ｈｌ、Ｈ２およびＨ３）でサイクリ、
りに受は持つようにして磁気テープ上に記録し、これを
再生するように構成したことを特徴とするビデオテープ
レコーダ。The screen is divided into two fields (first field and second field) consisting of every other scanning line, and each field is further divided into two bands. The second field has two bands, Bc13 and Bd4, and the above four bands are 3 bands.
Cycling with magnetic heads (Hl, H2 and H3),
1. A video tape recorder characterized in that the video tape recorder is configured to record on a magnetic tape while holding the receiver, and to play back the recorded data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57176146A JPS5883308A (en) | 1982-10-08 | 1982-10-08 | Video tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57176146A JPS5883308A (en) | 1982-10-08 | 1982-10-08 | Video tape recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5883308A true JPS5883308A (en) | 1983-05-19 |
Family
ID=16008462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57176146A Pending JPS5883308A (en) | 1982-10-08 | 1982-10-08 | Video tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5883308A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4627104A (en) * | 1983-04-30 | 1986-12-02 | U.S. Philips Corporation | Mixer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5012970U (en) * | 1973-05-31 | 1975-02-10 |
-
1982
- 1982-10-08 JP JP57176146A patent/JPS5883308A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5012970U (en) * | 1973-05-31 | 1975-02-10 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4627104A (en) * | 1983-04-30 | 1986-12-02 | U.S. Philips Corporation | Mixer |
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