JPS59161772U - Dropout marking device - Google Patents
Dropout marking deviceInfo
- Publication number
- JPS59161772U JPS59161772U JP5534783U JP5534783U JPS59161772U JP S59161772 U JPS59161772 U JP S59161772U JP 5534783 U JP5534783 U JP 5534783U JP 5534783 U JP5534783 U JP 5534783U JP S59161772 U JPS59161772 U JP S59161772U
- Authority
- JP
- Japan
- Prior art keywords
- dropout
- signal
- pulse generation
- circuit
- information recorded
- 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
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) [Abstract] 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を含む映像再生信号の図形、第
2図はドロップアウト検出およびマーキング回路の従来
装置である。第3図はその動作説明のための各部の波形
を示す。第4図は本考案の実施例でありマーキング回路
を示す回路図である。
また第5図は従来例と実施例のマーキング信号およびビ
ッタ−図形の比較である。
図面において、1・・・記録再生ヘッド、2および3・
・・記録再生切替ヘッド、4・・・再生増幅回路、5・
・・記録増幅回路、6・・・ドロップアウト検出装置、
7・・・パルス発生回路、訃・・高周波ゲート発振回路
、A・・・1トランツク分のビック二図形の従来例、ま
たB・・・1トラック分のビッタ−図形の実施例である
。FIG. 1 shows a diagram of a video playback signal including dropouts, and FIG. 2 shows a conventional dropout detection and marking circuit. FIG. 3 shows waveforms of various parts for explaining the operation. FIG. 4 is a circuit diagram showing a marking circuit according to an embodiment of the present invention. Further, FIG. 5 is a comparison of marking signals and bitter figures of the conventional example and the embodiment. In the drawings, 1... recording/reproducing head, 2 and 3...
...recording/reproduction switching head, 4...reproduction amplification circuit, 5.
... Recording amplification circuit, 6... Dropout detection device,
7...Pulse generation circuit, A...High frequency gate oscillation circuit, A...Conventional example of Bic2 pattern for one trunk, and B...Example of Bitter pattern for one track.
Claims (1)
変調信号として再生する映像記録ヘッドを備えた映像信
号再生装置、再生された映像信号に存在する設定レベル
以上のドロップアウトを検出し得るドロップアウト検出
装置、波形整形されたドロップアウト検出信号を入力と
する2個のパルス発生回路、パルス発生回路の1つの出
力パルスを信号とする記録再生切替スイッチを作動せし
める手段、パルス発生回路の他の1つの出力パルスをゲ
ート入力とする高周波ゲート発振回路、該発振回路の出
力信号を該映像記録ヘッドにフィードバックしてドロッ
プアウトを示す部分近傍の磁気テープの記録情報を交流
消磁せしめる手段を備えてなる、磁気テープに存在する
設定レベル以上のドロップアウトの発生位置を同定し消
磁部分の大きいビッタ−図形を形成せしめ得るドロップ
アウトのマーキング回路。A video signal reproducing device equipped with a video recording head that reproduces information recorded on a magnetic tape as a frequency modulation signal or a phase modulation signal, and a dropout detection device capable of detecting a dropout of a set level or higher that exists in the reproduced video signal. an apparatus, two pulse generation circuits receiving a waveform-shaped dropout detection signal as input, means for activating a recording/reproduction switch using one output pulse of the pulse generation circuit as a signal, and another one of the pulse generation circuits. A magnetic device comprising: a high-frequency gate oscillation circuit that receives an output pulse as a gate input; and means for feeding back an output signal of the oscillation circuit to the video recording head to cause AC demagnetization of information recorded on the magnetic tape near a portion indicating a dropout. A dropout marking circuit that can identify the position of a dropout on a tape that is higher than a set level and form a bitter pattern with a large demagnetized portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5534783U JPS59161772U (en) | 1983-04-15 | 1983-04-15 | Dropout marking device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5534783U JPS59161772U (en) | 1983-04-15 | 1983-04-15 | Dropout marking device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59161772U true JPS59161772U (en) | 1984-10-30 |
JPH0238549Y2 JPH0238549Y2 (en) | 1990-10-17 |
Family
ID=30185671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5534783U Granted JPS59161772U (en) | 1983-04-15 | 1983-04-15 | Dropout marking device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59161772U (en) |
-
1983
- 1983-04-15 JP JP5534783U patent/JPS59161772U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0238549Y2 (en) | 1990-10-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS59161772U (en) | Dropout marking device | |
JPS59161771U (en) | Dropout marking device | |
JPS60123730U (en) | magnetic recording and reproducing device | |
JPS619976U (en) | FM audio recording VTR | |
JPS5830919U (en) | playback device | |
JPS5971441U (en) | magnetic recording and playback device | |
JPS5897793U (en) | magnetic recording and playback device | |
JPS5966936U (en) | magnetic recording and reproducing device | |
JPS60173172U (en) | Noise removal circuit | |
JPS58151936U (en) | Cue device | |
JPS58141678U (en) | Video and audio signal recording and playback equipment | |
JPS60135826U (en) | Video signal recording and playback device | |
JPS609006U (en) | magnetic recording and playback device | |
JPS6031707U (en) | magnetic recording and reproducing device | |
JPS603932U (en) | tape recorder | |
JPS59168820U (en) | magnetic recording and playback device | |
JPS5817692U (en) | playback device | |
JPS5939413U (en) | tape recorder | |
JPS6442504U (en) | ||
JPS58176228U (en) | Tape recorder recording signal position detection device | |
JPS6031734U (en) | Between songs on a tape recorder | |
JPS58165730U (en) | Recording/playback device | |
JPS60183962U (en) | magnetic recording and playback device | |
JPS60102736U (en) | Queue signal recording and reproducing device | |
JPS59185710U (en) | video tape recorder device |