JPH0472882A - magnetic recording and reproducing device - Google Patents
magnetic recording and reproducing deviceInfo
- Publication number
- JPH0472882A JPH0472882A JP2135940A JP13594090A JPH0472882A JP H0472882 A JPH0472882 A JP H0472882A JP 2135940 A JP2135940 A JP 2135940A JP 13594090 A JP13594090 A JP 13594090A JP H0472882 A JPH0472882 A JP H0472882A
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- output
- magnetic recording
- playback
- reproducing 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.)
- 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
【発明の詳細な説明】
産業上の利用分野
本発明は、映像信号がない場合に内部発生映像信号を出
力する回路を有する磁気記録再生装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording/reproducing device having a circuit for outputting an internally generated video signal when no video signal is available.
従来の技術
映像信号無人力時および再生映像信号のないノイズ画面
の状態の時その代わりに内部発生映像信号を出力する回
路を搭載したＶＴＲがある。このＶＴＲの内部発生映像
信号出力のブロック同第２２、−７
図を用いて従来の構成を説明する。ヘッド１より再生さ
れた信号は、再生増幅器２より映像信号処理回路３に入
り再生映像信号５として出力される。BACKGROUND OF THE INVENTION There is a VTR equipped with a circuit that outputs an internally generated video signal instead of a video signal when the video signal is unattended or when there is a noise screen with no reproduced video signal. The conventional configuration of the VTR's internally generated video signal output block will be explained with reference to FIGS. 22 and 7. The signal reproduced from the head 1 enters a video signal processing circuit 3 from a reproduction amplifier 2 and is output as a reproduction video signal 5.
捷だ外部映像信号人力４の出力として外部映像信号６が
あり、再生時には、再生映像信号５が、記録時には外部
映像信号６が出力される。出力された映像信号７は、映
像信号判別回路９に入力される。There is an external video signal 6 as an output of the unscrambled external video signal 4. During playback, the reproduced video signal 5 is output, and during recording, the external video signal 6 is output. The output video signal 7 is input to a video signal discrimination circuit 9.
映像信号７が有る場合は、制御信号１０により、映像信
号７を選択し１１に出力される。−ｉ′た、出力に映像
信号７がない場合は、制御信号１０により内部映像信号
発生回路８で、作成された内部発生映像信号１２を選択
し１１に出力する構成となっている。If the video signal 7 is present, the video signal 7 is selected by the control signal 10 and output to 11. -i' If there is no video signal 7 in the output, the internal video signal generation circuit 8 selects the internally generated video signal 12 created by the control signal 10 and outputs it to the internal video signal generation circuit 11.
発明が解決しようとする課題
映像信号の記録状態が悪い減磁したテープ、ダビングを
くり返し行ったテープ及び磁気テープ上の記録パターン
がＨ並びしていないテープでの特殊＋ＪＴ生時に映像信
号判別回路は、映像信号が有る場合でもノイズ、スキー
−歪により映像信号を検出できなくなり、再生映像信号
と内部発生映像信３、．７
号を交互に、出力してし捷うといったチャタリング状態
を起こすこともあり、非常に見苦しい再生画面となって
いた。Problems to be Solved by the Invention The video signal discrimination circuit cannot be used during special + JT playback on demagnetized tapes with bad video signal recording conditions, tapes that have been repeatedly dubbed, and tapes where the recording patterns on the magnetic tapes are not in H alignment. , even if there is a video signal, the video signal cannot be detected due to noise and ski distortion, and the reproduced video signal and internally generated video signals 3, . No. 7 was output and shuffled alternately, resulting in a chattering state, resulting in an extremely unsightly playback screen.
課題を解決するための手段
」二記課題を解決するために本発明は、映像信号判別出
力に関係なく常に特殊再生時は、内部発生映像信号に切
り換わらないように禁止する構成にしたものである。Means for Solving the Problems In order to solve the second problem, the present invention is configured to always prohibit switching to an internally generated video signal during special playback, regardless of the video signal discrimination output. be.
作用
本発明は、上記した構成によって、特殊再生時は、再生
映像信号と内部発生映像信号の切り換えを行っている映
像信号判別出力を、特殊再生制御信号で、内部発生映像
信号に切り換わらないように禁止し、常に再生映像信号
を出力することができる。According to the above-described configuration, the present invention prevents the video signal discrimination output, which switches between the reproduced video signal and the internally generated video signal, from being switched to the internally generated video signal by the special playback control signal during special playback. It is possible to always output the playback video signal.
実施例
以下、本発明の磁気記録再生装置の一実施例について図
面を参照しながら説明する。Embodiment Hereinafter, an embodiment of the magnetic recording/reproducing apparatus of the present invention will be described with reference to the drawings.
第１図は、本実施例の（性成図である。ヘッド１より再
生された信号は、（」）主増幅器２より映像信号処理回
路３に入り、再生映像信号５として出力される。再生時
には再生映像信号６が、７に出力される。７に出力され
た映像信号は、映像信号判別回路１０に入力される。映
像信号が有る場合でかつ通常再生時には制御信号１２が
１３に出力され、映像信号７を選択し１６に出力する。FIG. 1 is a diagram showing the characteristics of this embodiment. The signal reproduced from the head 1 enters the video signal processing circuit 3 from the main amplifier 2, and is output as a reproduced video signal 5. Sometimes the reproduced video signal 6 is outputted to 7. The video signal outputted to 7 is inputted to the video signal discrimination circuit 10. When there is a video signal and during normal reproduction, the control signal 12 is outputted to 13. , selects the video signal 7 and outputs it to 16.
また７の出力に映像信号のない場合でかつ通常再生時に
は制御信号１２が１３に出力され、内部映像信号発生回
路８で作成された内部映像信号９を選択し、１６に出力
する。次に特殊再生時には、映像信号判別回路１０の出
力１２の制御信号が１３に出力されないように、特殊再
生制御信号１１の出力１４により禁止する構成とした磁
気記録１１ｆ生装置である。Further, when there is no video signal at the output of 7 and during normal playback, the control signal 12 is output to 13, and the internal video signal 9 generated by the internal video signal generation circuit 8 is selected and output to 16. Next, during special reproduction, the magnetic recording 11f production device is configured to prohibit the output 14 of the special reproduction control signal 11 so that the control signal of the output 12 of the video signal discrimination circuit 10 is not output to 13.
発明の効果
以上のように本発明によれば、映像信号判別回路が特殊
再生時に再生映像信号を検出できない場合でも、内部発
生映像信号を誤って出力することなく、再生映像信号を
出力するといった効果を得ることができる。Effects of the Invention As described above, according to the present invention, even if the video signal discrimination circuit cannot detect the reproduced video signal during special playback, the reproduced video signal can be output without erroneously outputting the internally generated video signal. can be obtained.
５ ・−７5・-7
第１図は本発明の磁気記録再生装置の一実施例の構成を
示すブロック図、第２図は従来例の構成を示すブロック
図である。
２・・・・・・再生増幅器、３・・・・・・映像信号処
理回路、４・・・・・・外部映像信号入力、８・・・・
・・内部映像信号発生回路、１ｏ・・・・・映像信号判
別回路、１１・・・・・・特殊再生制御信号。FIG. 1 is a block diagram showing the configuration of an embodiment of the magnetic recording/reproducing apparatus of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional example. 2... Regeneration amplifier, 3... Video signal processing circuit, 4... External video signal input, 8...
...Internal video signal generation circuit, 1o...Video signal discrimination circuit, 11...Special playback control signal.
Claims (1)
り換える回路を有している磁気記録再生装置において、
高速再生、高速逆再生、静止画などの特殊再生時は、映
像信号判別出力に関係なく、常に内部発生映像信号への
切換えを、禁止したことを特徴とする磁気記録再生装置
。In a magnetic recording/reproducing device having a circuit for detecting the absence of a video signal and switching to an internally generated video signal,
A magnetic recording/reproducing device characterized in that switching to an internally generated video signal is always prohibited during high-speed playback, high-speed reverse playback, special playback of still images, etc., regardless of the video signal discrimination output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2135940A JP3024165B2 (en) | 1990-05-25 | 1990-05-25 | Magnetic recording / reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2135940A JP3024165B2 (en) | 1990-05-25 | 1990-05-25 | Magnetic recording / reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0472882A true JPH0472882A (en) | 1992-03-06 |
| JP3024165B2 JP3024165B2 (en) | 2000-03-21 |
Family
ID=15163402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2135940A Expired - Fee Related JP3024165B2 (en) | 1990-05-25 | 1990-05-25 | Magnetic recording / reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3024165B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0993922A (en) * | 1995-09-26 | 1997-04-04 | Nec Corp | Resonance-type dc-dc converter |
| US6396714B2 (en) | 2000-01-24 | 2002-05-28 | Nec Corporation | Active clamping for zero current zero voltage forward conversion |
-
1990
- 1990-05-25 JP JP2135940A patent/JP3024165B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0993922A (en) * | 1995-09-26 | 1997-04-04 | Nec Corp | Resonance-type dc-dc converter |
| US6396714B2 (en) | 2000-01-24 | 2002-05-28 | Nec Corporation | Active clamping for zero current zero voltage forward conversion |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3024165B2 (en) | 2000-03-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |