JPS6098152U - Dropout detection circuit - Google Patents
Dropout detection circuitInfo
- Publication number
- JPS6098152U JPS6098152U JP18677783U JP18677783U JPS6098152U JP S6098152 U JPS6098152 U JP S6098152U JP 18677783 U JP18677783 U JP 18677783U JP 18677783 U JP18677783 U JP 18677783U JP S6098152 U JPS6098152 U JP S6098152U
- Authority
- JP
- Japan
- Prior art keywords
- predetermined
- dropout detection
- high frequency
- detection circuit
- multiplied signal
- 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
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、ドロップアウト検出回路の従来例を示すブロ
ック図、第２図は、オーディオ信号及びビデオ信号のみ
が重畳記録された記録媒体から読取られたＲＦ倍信号ス
ペクトラムを示す図、第３図は、第１図の回路の動作を
示す波形図、第４図は、オーディオ信号及びビデオ信号
と共にＰＣＭ信号が重畳記録された記録媒体から読取ら
れたＲＦ倍信号スペクトラムを示す図、第５図は、本考
案の一実施例を示す図、第６図は第５図の回路の動作を
示す波形図である。
主要部分の符号の説明、１０・・・高域抽出回路、１１
・・・クリップ回路。FIG. 1 is a block diagram showing a conventional example of a dropout detection circuit, FIG. 2 is a diagram showing an RF multiplied signal spectrum read from a recording medium on which only an audio signal and a video signal are recorded in a superimposed manner, and FIG. 1 is a waveform diagram showing the operation of the circuit in FIG. 1, FIG. 4 is a diagram showing an RF multiplied signal spectrum read from a recording medium on which a PCM signal is recorded superimposed with an audio signal and a video signal, and FIG. FIG. 6 is a waveform diagram showing the operation of the circuit shown in FIG. 5. Explanation of symbols of main parts, 10...High frequency extraction circuit, 11
...Clip circuit.
Claims (2)
ルと所定値だけ異なる第２所定レベルでクリップす、る
クリップ手段と、前記クリップ手段によってクリップさ
れたＲＦ倍信号ら所定周波数以上の高域成分を抽出する
高域抽出手段とを含み、前記高域抽出手段の出力の瞬時
レベルが前記第１所定レベルに等しくなる周期が所定周
期以上になったときドロップアウト検出信号を発生する
ことを特徴と子るドロップアウト検出回路。(1) Clipping means for clipping the RF multiplied signal read from the recording medium at a second predetermined level that is different by a predetermined value from the first predetermined level; and a high frequency extraction means for extracting a high frequency component, and generating a dropout detection signal when a period in which the instantaneous level of the output of the high frequency extraction means is equal to the first predetermined level is equal to or more than a predetermined period. Features and child dropout detection circuit.
波数以下の低域成分を除去する低域成分除去手段と、前
記ＲＦ倍信号前記所定周波数より高い成分を選択的に増
幅する増幅手段とからなることを特徴とする実用新案登
録請求の範囲第１項記載のドロップアウト検出回路。(2) The high frequency extraction means includes a low frequency component removal means for removing low frequency components below the predetermined frequency of the RF multiplied signal, and an amplification means for selectively amplifying components higher than the predetermined frequency of the RF multiplied signal. A dropout detection circuit according to claim 1, characterized in that the circuit comprises:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18677783U JPS6098152U (en) | 1983-12-02 | 1983-12-02 | Dropout detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18677783U JPS6098152U (en) | 1983-12-02 | 1983-12-02 | Dropout detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6098152U true JPS6098152U (en) | 1985-07-04 |
| JPH0142859Y2 JPH0142859Y2 (en) | 1989-12-13 |
Family
ID=30403353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18677783U Granted JPS6098152U (en) | 1983-12-02 | 1983-12-02 | Dropout detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6098152U (en) |
-
1983
- 1983-12-02 JP JP18677783U patent/JPS6098152U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0142859Y2 (en) | 1989-12-13 |
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