JPH051179Y2 - - Google Patents
Info
- Publication number
- JPH051179Y2 JPH051179Y2 JP1983069911U JP6991183U JPH051179Y2 JP H051179 Y2 JPH051179 Y2 JP H051179Y2 JP 1983069911 U JP1983069911 U JP 1983069911U JP 6991183 U JP6991183 U JP 6991183U JP H051179 Y2 JPH051179 Y2 JP H051179Y2
- Authority
- JP
- Japan
- Prior art keywords
- video
- vtr
- signal
- dropout
- output
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 6
- 230000008054 signal transmission Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Studio Circuits (AREA)
- Television Signal Processing For Recording (AREA)
Description
【考案の詳細な説明】
本考案は、ビデオテープレコーダー（VTR）
を使用したVTR再生信号送出装置に関する。[Detailed explanation of the invention] This invention is a video tape recorder (VTR).
This invention relates to a VTR playback signal sending device using.
テレビジヨン放送局等に於いて、VTR再生を
行つて映像出力を送出する場合、未録画の領域を
有するビデオテープが再生された時には、VTR
から出力される映像信号は、過大レベルのノイズ
成分のみとなる。実際においては、このノイズ成
分の信号は、送信機においては過変調の原因とな
つたりして放送用に適さない為、送出を防止しな
ければならない。この防止においては、従来は、
番組制作者の判断により放送に適する他の映像信
号へ手動で切替えていた。しかし、この方法で
は、番組制作者が過大な映像ノイズを発見した
後、切替迄の間は、過大な映像ノイズ信号の送出
を避けることができない欠点があつた。 When a television broadcasting station, etc. performs VTR playback and transmits video output, when a videotape with an unrecorded area is played back, the VTR
The video signal outputted from the system contains only excessive level noise components. In reality, this noise component signal causes overmodulation in the transmitter and is not suitable for broadcasting, so it must be prevented from being transmitted. To prevent this, conventionally,
Video signals were manually switched to other video signals suitable for broadcasting at the discretion of program producers. However, this method has the drawback that, after the program producer discovers excessive video noise, it is impossible to avoid transmitting excessive video noise signals until the program is switched.
また送出の前に編集作業を行つて過大な映像ノ
イズ部分をカツトすればよいが、この編集作業時
においてもノイズ部分を制作者が切替える必要が
あり、上述の欠点は同様に存在していた。 Moreover, it is possible to perform editing work to cut out excessive video noise parts before sending out the video, but the producer must also switch out the noise parts during this editing work, and the above-mentioned drawbacks still exist.
本考案の目的は、従来のように誤まつて未録画
領域を有するビデオテープを再生して送出した場
合でも、過大なノイズ成分を含む映像信号が送出
するのを防ぎ、放送に適した他の映像信号を自動
的に送出するVTR再生信号送出装置を提供する
ことにある。 The purpose of the present invention is to prevent video signals containing excessive noise components from being transmitted even if a video tape with an unrecorded area is accidentally played back and transmitted as in the past, An object of the present invention is to provide a VTR playback signal sending device that automatically sends out a video signal.
本考案によれば、VTRから出力される映像信
号の高周波変調信号のドロツプアウトを示すドロ
ツプアウト信号を検出し、ドロツプアウト信号の
継続時間が約１フレーム以上の場合には、未録画
領域のビデオテープを再生したものと見なして、
VTR出力映像信号から、放送に適する他の映像
信号へ瞬時に自動切替するVTR再生信号送出装
置が得られる。 According to the present invention, a dropout signal indicating a dropout of a high frequency modulation signal of a video signal output from a VTR is detected, and if the duration of the dropout signal is approximately one frame or more, the unrecorded video tape is played back. It is considered that
A VTR playback signal sending device that instantly and automatically switches from a VTR output video signal to another video signal suitable for broadcasting can be obtained.
次に、本考案の一実施例の図面を参照して、本
考案を詳細に説明する。図面は本考案の一実施例
を示す図であり、VTR１、他の映像機器２、タ
イムベースコレクター３、ドロツプアウト継続時
間検知回路４、映像切替器５とから構成される。
動作を説明すると、再生VTR１からの映像再生
出力ｖ及びドロツプアウト信号ｄはタイムベース
コレクター３に送られ、ここで時間軸の変動やド
ロツプアウトが補償された映像出力が作り出さ
れ、この映像出力は映像切替器５を介して送出さ
れる。他方、VTR１からのドロツプアウト信号
ｄはドロツプアウト継続時間検知回路４に送ら
れ、ここでドロツプアウト期間が例えば１フレー
ム（33.3msec）以上であれば、VTR１からの信
号の代りに、他の映像機器２からの映像出力v′に
映像切替器５で切替えて、これを送出する。ドロ
ツプアウト期間が１フレームより短かければ映像
切替器５はVTR１からの映像出力を選択し続け
る。 Next, the present invention will be described in detail with reference to the drawings of an embodiment of the present invention. The drawing shows an embodiment of the present invention, which is comprised of a VTR 1, other video equipment 2, a time base collector 3, a dropout duration detection circuit 4, and a video switching device 5.
To explain the operation, the video playback output v and dropout signal d from the playback VTR 1 are sent to the time base collector 3, where a video output is created with time axis fluctuations and dropouts compensated for, and this video output is used for video switching. It is sent out via the device 5. On the other hand, the dropout signal d from the VTR 1 is sent to the dropout duration detection circuit 4, and if the dropout period is, for example, 1 frame (33.3 msec) or more, the dropout signal d from the VTR 1 is sent to the dropout duration detection circuit 4, where the dropout signal d is sent from another video device 2 instead of the signal from the VTR 1. The video output v' is switched to the video output v' by the video switch 5 and sent out. If the dropout period is shorter than one frame, the video switch 5 continues to select the video output from the VTR 1.
以上説明したように、本考案によれば、再生
VTRが未録画部分を含むビデオテープを再生し
て、このVTRから過大な映像ノイズが出力され
ても、これが不要に送出されることを防ぐことが
できる。 As explained above, according to the present invention, the reproduction
Even if the VTR plays back a videotape including unrecorded parts and excessive video noise is output from the VTR, this can be prevented from being sent out unnecessarily.
本考案は、以上説明したように、ドロツプアウ
トの継続時間の長短を判断して他の映像信号へ切
替えることによつて、VTRから出力される過大
な映像ノイズ送出を防止できる効果がある。 As explained above, the present invention has the effect of preventing excessive video noise from being output from a VTR by determining the length of the dropout duration and switching to another video signal.
本発明においては、映像信号の断をVTRから
のドロツプアウト信号に基づいて検出しているた
め、映像信号の内容や信号状態により影響を受け
ることなく、この断を確実に検出することができ
るため、正確で安定に切替動作を行うことができ
る。 In the present invention, since the disconnection of the video signal is detected based on the dropout signal from the VTR, the disconnection can be reliably detected without being affected by the content or signal condition of the video signal. Accurate and stable switching operations can be performed.
図面は、本考案の一実施例を示す構成図であ
る。
図において、１……VTR、２……他の映像機
器、３……タイムベースコレクター、４……ドロ
ツプアウト継続時間検知回路、５……映像切替
器。
The drawing is a configuration diagram showing an embodiment of the present invention. In the figure, 1...VTR, 2...Other video equipment, 3...Time base collector, 4...Dropout duration detection circuit, 5...Video switching device.
Claims (1)
出力と前記他の映像源からの映像出力とを切替え
る切替器と、前記VTRからの映像信号の高周波
変調信号のドロツプアウトを示すドロツプアウト
信号を受けドロツプアウト期間があらかじめ定め
られた期間よりも長いことを検知する検知回路と
を具備し、前記検知回路の出力に応じて前記切替
器が前記他の映像源からの映像出力を選択するよ
うにしたことを特徴とするVTR再生信号送出装
置。 A VTR, another video source, a switch for switching between the video output from the VTR and the video output from the other video source, and a dropout signal that receives a dropout signal indicating a dropout of a high frequency modulation signal of the video signal from the VTR. and a detection circuit that detects that the dropout period is longer than a predetermined period, and the switching device selects the video output from the other video source according to the output of the detection circuit. A VTR playback signal transmission device featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6991183U JPS59174773U (en) | 1983-05-11 | 1983-05-11 | VTR playback signal sending device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6991183U JPS59174773U (en) | 1983-05-11 | 1983-05-11 | VTR playback signal sending device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59174773U JPS59174773U (en) | 1984-11-21 |
| JPH051179Y2 true JPH051179Y2 (en) | 1993-01-13 |
Family
ID=30200059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6991183U Granted JPS59174773U (en) | 1983-05-11 | 1983-05-11 | VTR playback signal sending device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59174773U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH065903B2 (en) * | 1987-06-24 | 1994-01-19 | 株式会社メディア | Matrix switcher with input / output combination pattern preset, storage and switching functions |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS543425A (en) * | 1977-06-09 | 1979-01-11 | Sanyo Electric Co Ltd | Reproducing video signal priority channel selector |
| JPS57101479A (en) * | 1980-12-16 | 1982-06-24 | Matsushita Electric Ind Co Ltd | Signal switching device for television receiver |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5726445Y2 (en) * | 1973-12-26 | 1982-06-09 |
-
1983
- 1983-05-11 JP JP6991183U patent/JPS59174773U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS543425A (en) * | 1977-06-09 | 1979-01-11 | Sanyo Electric Co Ltd | Reproducing video signal priority channel selector |
| JPS57101479A (en) * | 1980-12-16 | 1982-06-24 | Matsushita Electric Ind Co Ltd | Signal switching device for television receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59174773U (en) | 1984-11-21 |
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