JPS628774U - - Google Patents
Info
- Publication number
- JPS628774U JPS628774U JP9876985U JP9876985U JPS628774U JP S628774 U JPS628774 U JP S628774U JP 9876985 U JP9876985 U JP 9876985U JP 9876985 U JP9876985 U JP 9876985U JP S628774 U JPS628774 U JP S628774U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- reproduction
- reproduction signal
- extracted
- switching
- 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
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Television Signal Processing For Recording (AREA)
Description
第１図は本考案装置の一実施例のブロツク系統
図、第２図は本考案装置に用いられる磁気ヘツド
を説明するための図、第３図は従来装置の一例の
ブロツク系統図、第４図は本考案装置で再生され
るテープの既記録映像トラツクパターンとその走
査を説明するための図、第５図は第１図示の装置
各部の信号波形図である。
２ａ，２ｂ，３ａ，３ｂ……磁気ヘツド、１２
，２２，２５，２６……スイツチ、１３，１４…
…検波器、１５……比較器、２０……遅延回路、
２１……制御信号生成回路、２４……ドロツプア
ウト検出器、３１……１Ｈ遅延回路。
FIG. 1 is a block system diagram of an embodiment of the device of the present invention, FIG. 2 is a diagram for explaining the magnetic head used in the device of the present invention, FIG. 3 is a block system diagram of an example of a conventional device, and FIG. The figure is a diagram for explaining the recorded video track pattern of the tape reproduced by the device of the present invention and its scanning, and FIG. 5 is a signal waveform diagram of each part of the device shown in FIG. 2a, 2b, 3a, 3b...magnetic head, 12
, 22, 25, 26... switch, 13, 14...
...Detector, 15...Comparator, 20...Delay circuit,
21... Control signal generation circuit, 24... Dropout detector, 31... 1H delay circuit.
Claims (1)
の２個の磁気ヘツドを少なくとも１組設けられて
おり、該２個の磁気ヘツド夫々で記録媒体の既記
録映像トラツクより再生された再生信号夫々を検
波した後比較して切換信号を生成し、該切換信号
に応じて該２個の磁気ヘツドの再生信号のうち再
生レベルの大なる方の再生信号を切換えて取り出
し、かつ取り出された再生信号のドロツプアウト
発生時に該再生信号より復調された輝度信号を１
Ｈ（Ｈは水平走査周期）前の輝度信号に置き換え
てドロツプアウト補償を行なう磁気再生装置にお
いて、該切換信号から再生信号の切換えタイミン
グに対応した制御信号を生成する制御信号生成回
路と、該制御信号により該取り出された再生信号
を強制的にミユーテイングしてドロツプアウトを
発生させてドロツプアウト補償を行なう回路に供
給するミユーテイング回路とよりなる磁気再生装
置。 At least one set of two magnetic heads having opposite azimuths is provided adjacent to each other in the rotational direction of the rotating body, and each of the two magnetic heads receives a reproduction signal reproduced from a recorded video track of a recording medium. After the detection, a switching signal is generated by comparing the signals, and according to the switching signal, the reproduction signal with a higher reproduction level of the reproduction signals of the two magnetic heads is switched and extracted, and the reproduction signal of the extracted reproduction signal is When a dropout occurs, the luminance signal demodulated from the reproduced signal is
In a magnetic reproducing device that performs dropout compensation by replacing a luminance signal H (H is a horizontal scanning period) before, a control signal generation circuit that generates a control signal corresponding to a switching timing of a reproduction signal from the switching signal; A magnetic reproducing device comprising a muting circuit that forcibly mutes the extracted reproduction signal to generate dropout and supplies it to a circuit that performs dropout compensation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9876985U JPH0523028Y2 (en) | 1985-06-28 | 1985-06-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9876985U JPH0523028Y2 (en) | 1985-06-28 | 1985-06-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS628774U true JPS628774U (en) | 1987-01-20 |
| JPH0523028Y2 JPH0523028Y2 (en) | 1993-06-14 |
Family
ID=30967033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9876985U Expired - Lifetime JPH0523028Y2 (en) | 1985-06-28 | 1985-06-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0523028Y2 (en) |
-
1985
- 1985-06-28 JP JP9876985U patent/JPH0523028Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0523028Y2 (en) | 1993-06-14 |
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