JPS60129782U - dropout compensator - Google Patents
dropout compensatorInfo
- Publication number
- JPS60129782U JPS60129782U JP1560184U JP1560184U JPS60129782U JP S60129782 U JPS60129782 U JP S60129782U JP 1560184 U JP1560184 U JP 1560184U JP 1560184 U JP1560184 U JP 1560184U JP S60129782 U JPS60129782 U JP S60129782U
- Authority
- JP
- Japan
- Prior art keywords
- dropout
- dropout compensation
- circuit
- detection means
- compensation device
- 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
Landscapes
- Television Signal Processing For Recording (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案実施例の回路ブロック図、第２図は第１
図の要部波形図、第３図は従来例を示す回路ブロック図
、第４図は垂直同期信号の記録される部分を説明する為
の図である。
主な符号の説明、６・・・選択手段（スイッチ回路）、
８・・・ピーク検波回路、９・・・シュミット回路、１
０・・・ＩＨ遅延線、１土・・・擬似垂直同期信号作成
回路（マスクパルス発生回路）、１６・・・オアゲート
、１７・・・ダイオード（禁止手段）。Fig. 1 is a circuit block diagram of an embodiment of the present invention, and Fig. 2 is a circuit block diagram of an embodiment of the present invention.
3 is a circuit block diagram showing a conventional example, and FIG. 4 is a diagram for explaining a portion where a vertical synchronizing signal is recorded. Explanation of main symbols, 6... selection means (switch circuit),
8...Peak detection circuit, 9...Schmitt circuit, 1
0: IH delay line, 1: Pseudo vertical synchronization signal generation circuit (mask pulse generation circuit), 16: OR gate, 17: diode (inhibiting means).
Claims (1)
キヤン型ビデオテープレコーダのドロップアウト補償装
置において、回転ヘッドの回転に関連するＲＦスイッチ
ングパルスに基づいて垂直同期信号を含むタイミングの
マスクパルスヲ発生する回路と、再生信号のエンベロー
プ低下を検出するドロップアウト検出手段、ＩＨ遅延線
、前記ドロップアウト検出手段出力により、再生信号と
ＩＨ前の再生信号とのいずれかを選択する手段とよりな
るドロップアウト補償回路と、前記マスクパルスに基づ
き前記ドロップアウト補償回路の動作を禁止する手段と
を備えることを特徴とするドロップアウト補償装置。A dropout compensation device for a 2-helical scan video tape recorder that plays back a tape with a low playback level, comprising: a circuit for generating a timing mask pulse including a vertical synchronization signal based on an RF switching pulse related to rotation of a rotary head; a dropout compensation circuit comprising dropout detection means for detecting a drop in the envelope of a signal, an IH delay line, and means for selecting either a reproduced signal or a pre-IH reproduction signal based on the output of the dropout detection means; A dropout compensation device comprising: means for inhibiting operation of the dropout compensation circuit based on a mask pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1560184U JPS60129782U (en) | 1984-02-06 | 1984-02-06 | dropout compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1560184U JPS60129782U (en) | 1984-02-06 | 1984-02-06 | dropout compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60129782U true JPS60129782U (en) | 1985-08-30 |
Family
ID=30501587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1560184U Pending JPS60129782U (en) | 1984-02-06 | 1984-02-06 | dropout compensator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60129782U (en) |
-
1984
- 1984-02-06 JP JP1560184U patent/JPS60129782U/en active Pending
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