JPH01160780U - - Google Patents
Info
- Publication number
- JPH01160780U JPH01160780U JP5753988U JP5753988U JPH01160780U JP H01160780 U JPH01160780 U JP H01160780U JP 5753988 U JP5753988 U JP 5753988U JP 5753988 U JP5753988 U JP 5753988U JP H01160780 U JPH01160780 U JP H01160780U
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- detection
- compensating
- response
- horizontal period
- 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
- 238000001514 detection method Methods 0.000 claims description 9
- 230000001934 delay Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Television Signal Processing For Recording (AREA)
Description
第１図は本考案の一実施例であるＶＴＲの再生
回路のブロツク図、第２図は従来例のＶＴＲの再
生回路のブロツク図、第３図は第１図及び第２図
の回路で再生されるＦＭ輝度信号とドロツプアウ
ト検出回路のしきい値レベルを示す波形図である
。
１……磁気ヘツド、２……プリアンプ、３……
高域通過フイルタ（ＨＰＦ）、５……低域通過フ
イルタ（ＬＰＦ）、６……色信号再生処理回路、
７……１Ｈ遅延回路、８……スイツチ、９……輝
度信号再生処理回路、１０……混合回路、１２…
…帯域通過フイルタ（ＢＰＦ）、１３，１４……
スイツチ、４０……ドロツプアウト検出回路、４
１……システムコントロール回路。
Fig. 1 is a block diagram of a reproducing circuit of a VTR which is an embodiment of the present invention, Fig. 2 is a block diagram of a conventional VTR reproducing circuit, and Fig. 3 is a block diagram of a reproducing circuit of a conventional VTR. FIG. 4 is a waveform diagram showing the FM luminance signal and the threshold level of the dropout detection circuit. 1...Magnetic head, 2...Preamplifier, 3...
High pass filter (HPF), 5...Low pass filter (LPF), 6...Color signal reproduction processing circuit,
7...1H delay circuit, 8...Switch, 9...Brightness signal reproduction processing circuit, 10...Mixing circuit, 12...
...Band pass filter (BPF), 13, 14...
Switch, 40... Dropout detection circuit, 4
1...System control circuit.
Claims (1)
が所定のしきい値レベル以下のとき上記映像信号
を１水平期間前の映像信号でドロツプアウト補償
して再生する磁気再生装置において、 高速または減速再生等の特殊再生のときに上記
再生された映像信号のレベルが上記しきい値レベ
ルよりも高いしきい値レベル以下となつたことを
検出し検出信号を出力する検出手段と、 上記検出手段から出力される検出信号に応答し
て上記映像信号を１水平期間前の映像信号でドロ
ツプアウト補償する補償手段と、 上記検出手段から出力される検出信号に応答し
て上記補償手段から出力される映像信号に対して
所定の周波数帯域で帯域制限する帯域制限手段と
を備えたことを特徴とする磁気再生装置。 (2) 上記補償手段が、上記映像信号を１水平期
間だけ遅延させる遅延回路と、上記検出信号に応
答して上記遅延回路から出力される映像信号を出
力するように切り換えるスイツチを備えたことを
特徴とする請求項第１項記載の磁気再生装置。[Claims for Utility Model Registration] (1) Magnetic device for reproducing the video signal by compensating drop-out with the video signal from one horizontal period ago when the level of the video signal reproduced by the magnetic head is below a predetermined threshold level. In the playback device, during special playback such as high-speed or deceleration playback, a detection device detects that the level of the reproduced video signal becomes equal to or lower than a threshold level higher than the threshold level, and outputs a detection signal. means for compensating for dropout of the video signal with a video signal from one horizontal period before in response to the detection signal output from the detection means; and compensation means for compensating for dropout in response to the detection signal output from the detection means. 1. A magnetic reproducing device comprising: band limiting means for band limiting a video signal outputted from the means in a predetermined frequency band. (2) The compensation means includes a delay circuit that delays the video signal by one horizontal period, and a switch that switches to output the video signal output from the delay circuit in response to the detection signal. A magnetic reproducing device according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5753988U JPH01160780U (en) | 1988-04-28 | 1988-04-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5753988U JPH01160780U (en) | 1988-04-28 | 1988-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01160780U true JPH01160780U (en) | 1989-11-08 |
Family
ID=31283389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5753988U Pending JPH01160780U (en) | 1988-04-28 | 1988-04-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01160780U (en) |
-
1988
- 1988-04-28 JP JP5753988U patent/JPH01160780U/ja active Pending
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