JPS6251546U - - Google Patents
Info
- Publication number
- JPS6251546U JPS6251546U JP14357885U JP14357885U JPS6251546U JP S6251546 U JPS6251546 U JP S6251546U JP 14357885 U JP14357885 U JP 14357885U JP 14357885 U JP14357885 U JP 14357885U JP S6251546 U JPS6251546 U JP S6251546U
- Authority
- JP
- Japan
- Prior art keywords
- pilot signal
- signal
- reference pilot
- reproduced
- beat
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Description
第１図は磁気テープに記録されたパイロツト信
号を示す概念図、第２図はこの考案の一実施例の
磁気記録再生装置の要部のブロツク図、第３図は
基準パイロツト信号の波形図、第４図はトラツキ
ング状態と再生パイロツト信号とビート信号成分
との関係を示す概念図、第５図は上記実施例の各
装置から出力される波形を示す波形図である。
１…磁気テープ、２…ミキサー、３…基準パイ
ロツト信号発生器、５，６…検波器、１３…メモ
リー、８…演算判別装置、１５…タイマー、１７
…制御装置。
FIG. 1 is a conceptual diagram showing a pilot signal recorded on a magnetic tape, FIG. 2 is a block diagram of the main part of a magnetic recording/reproducing apparatus according to an embodiment of this invention, and FIG. 3 is a waveform diagram of a reference pilot signal. FIG. 4 is a conceptual diagram showing the relationship between the tracking state, the reproduced pilot signal, and the beat signal component, and FIG. 5 is a waveform diagram showing the waveforms output from each device of the above embodiment. DESCRIPTION OF SYMBOLS 1... Magnetic tape, 2... Mixer, 3... Reference pilot signal generator, 5, 6... Detector, 13... Memory, 8... Arithmetic determination device, 15... Timer, 17
…Control device.
Claims (1)
磁気テープ上に回転磁気ヘツドに連係したトラツ
ク毎の切り換えで連続した４個のトラツク毎の周
期をなすようにしてＦＭ輝度信号等と共に記録し
、再生時に、上記パイロツト信号を取り出して、
この再生パイロツト信号と基準パイロツト信号と
のビート信号に基づいてトラツキングサーボを行
なうヘリカルスキヤン型の磁気記録再生装置にお
いて、 再生時に各トラツクにつき少なくとも２種類の
所定の周波数を有する基準パイロツト信号を所定
のタイミングで発生させる基準パイロツト信号発
生手段と、 上記磁気テープから再生された再生パイロツト
信号と上記基準パイロツト信号とのビート信号か
ら所定のビート信号成分を検出する検波手段と、 上記検波手段で検出されたビート信号成分の出
力の配分パターンによりトラツキング位相を判別
してトラツキング位相を表す制御信号を出力する
判別手段と、 上記判別手段からの制御信号を受けてトラツキ
ング位相に応じてキヤプスタンモータにブレーキ
をかけるタイミングを制御するタイマー手段とを
備えたことを特徴とする磁気記録再生装置。[Claims for Utility Model Registration] FM luminance signals, etc. are produced by switching each pilot signal having a different frequency on a magnetic tape for each track connected to a rotating magnetic head so as to form a cycle of every four consecutive tracks. When playing back, extract the pilot signal and
In a helical scan type magnetic recording and reproducing device that performs tracking servo based on the beat signal of the reproduced pilot signal and the reference pilot signal, the reference pilot signal having at least two types of predetermined frequencies is used for each track during reproduction. a reference pilot signal generating means for generating a reference pilot signal at a timing; a detection means for detecting a predetermined beat signal component from a beat signal of a reproduced pilot signal reproduced from the magnetic tape and the reference pilot signal; a determining means for determining a tracking phase based on a distribution pattern of the output of the beat signal component and outputting a control signal representing the tracking phase; 1. A magnetic recording and reproducing device characterized by comprising: timer means for controlling timing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14357885U JPH0535467Y2 (en) | 1985-09-19 | 1985-09-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14357885U JPH0535467Y2 (en) | 1985-09-19 | 1985-09-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6251546U true JPS6251546U (en) | 1987-03-31 |
| JPH0535467Y2 JPH0535467Y2 (en) | 1993-09-08 |
Family
ID=31053393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14357885U Expired - Lifetime JPH0535467Y2 (en) | 1985-09-19 | 1985-09-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0535467Y2 (en) |
-
1985
- 1985-09-19 JP JP14357885U patent/JPH0535467Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0535467Y2 (en) | 1993-09-08 |
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