JPS6021676A - Video camera - Google Patents
Video cameraInfo
- Publication number
- JPS6021676A JPS6021676A JP58129317A JP12931783A JPS6021676A JP S6021676 A JPS6021676 A JP S6021676A JP 58129317 A JP58129317 A JP 58129317A JP 12931783 A JP12931783 A JP 12931783A JP S6021676 A JPS6021676 A JP S6021676A
- Authority
- JP
- Japan
- Prior art keywords
- fade
- switch
- vtr
- circuit
- control signal
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Studio Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はテレビジョンカメラに係り、特にＶＴＲの録画
に好適なＦＡＤＥ機能に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a television camera, and particularly to a FADE function suitable for recording on a VTR.
従来のＦＡＤＨ機能付きテレビジョンカメラのシステム
を第１図及び第２図により説明する。A conventional television camera system with FADH function will be explained with reference to FIGS. 1 and 2.
第１図は全体のブロックダイアグラムであり。Figure 1 is an overall block diagram.
被写体１の情報な光電変換部２により電気信号に変換し
た後増幅器６で増幅され利得制御回路４、信号処理回路
５を経て複合映像信号６として出力される。ビューファ
インダーブラウン管８への信号は、 ＶＴＲからの送り
返しを考慮して信号処理回路５の一部から出力し、駆動
回路７に入力される。ＦＡＤＨ機能はＦＡＤＥ用スイッ
チ１０によりトリガを制御信号発生回路９に取り込んだ
後、カメラボーズスイッチ１１０トリガにより制御信号
が利得増幅回路４に印加されＦＡＤＥ動作を実現してい
る。この模様を第２図に示している。即ち％ＦＡＤＥ用
トリガ１２、カメラボーズ用トリガ１５により複合映像
信号レベル１４は図の様になる。１５はＶＴＲに録画さ
れる映像信号レベル及び時間を斜線部で示している。第
１の斜線部はＦＡＤＥｉ＃、第２の斜線部はＦＡＤＥｉ
＃ 、 ＦＡＤＥ ＯＵＴ録画であり２次はＦＡＤＥ
ＯＵＴであり、第４の斜線部は通常の録画である。Information about the subject 1 is converted into an electrical signal by the photoelectric converter 2, then amplified by the amplifier 6, passed through the gain control circuit 4 and the signal processing circuit 5, and is output as a composite video signal 6. The signal to the viewfinder cathode ray tube 8 is output from a part of the signal processing circuit 5 in consideration of being sent back from the VTR, and is input to the drive circuit 7. In the FADH function, a trigger is input to the control signal generation circuit 9 by the FADE switch 10, and then a control signal is applied to the gain amplifier circuit 4 by the camera Bose switch 110 trigger to realize FADE operation. This pattern is shown in Figure 2. That is, the composite video signal level 14 becomes as shown in the figure due to the trigger 12 for %FADE and the trigger 15 for camera Bose. 15, the video signal level and time recorded on the VTR are indicated by diagonal lines. The first shaded area is FADEi#, the second shaded area is FADEi
# , FADE OUT recording, secondary is FADE
OUT, and the fourth shaded area is normal recording.
以上の様な従来カメラでのＦＩＤＥ録画動作では、その
録画開始直前と録画終了直後はビューファインダー８で
撮影している被写体をモニタ−出来ない期間１６があり
、撮影の構図決定及び録画のタイミングが正確に決定で
きないという欠点があった。In the FIDE recording operation of conventional cameras as described above, there is a period 16 immediately before the start of recording and immediately after the end of recording in which the subject being photographed cannot be monitored with the viewfinder 8, and the composition of the photograph and the timing of recording are difficult to monitor. The drawback was that it could not be determined accurately.
本発明の目的はＦＡＤＥ録画をスムース実施するＦＡＤ
Ｅ機能付きビデオカメラを提供するにある。The purpose of the present invention is to smoothly perform FADE recording.
To provide video cameras with E function.
ＦＡＤＥ ｉＮ録画をする場合には、映像レベルを絞る
時定数を小さく 、 ＦＡＤＥ ｉＡ’動作にはいった
ら時定数を太きく Ｌ 、 ＦＡＤＥ ＯＵＴ録画する
場合は逆のことを実施する様な制御信号を発生させるこ
とで従来の問題点を解決した。When performing FADE iN recording, a control signal is generated that reduces the time constant to reduce the video level, increases the time constant when entering FADE iA' operation, and does the opposite when recording FADE OUT. This solved the problems of the conventional method.
以下１本発明の一実施例を第６図、第４図により説明す
る。An embodiment of the present invention will be described below with reference to FIGS. 6 and 4.
第５図は本発明の実施例のブロックダイアグラムであり
、被写体１の情報から複合映像信号出力６までの経路及
びビ、−ファインダブラウン管８までの経路は従来のカ
メラと同一である。FIG. 5 is a block diagram of an embodiment of the present invention, and the path from the information on the subject 1 to the composite video signal output 6 and the path to the viewfinder cathode ray tube 8 are the same as in the conventional camera.
ＦＡＤＥ動作を可能にする利得制御回路４０制御信号発
生回路９はＦＡＤＥ用スイッチ１０とカメラボーズスイ
ッチ１１の情報を取り込むトリガ計数回路１７の信号と
ＶＴＲからＶＴＲの動作モードを示す信号１９を取り込
み、 ＶＴＲの録画スタート。A gain control circuit 40 that enables FADE operation, and a control signal generation circuit 9 take in a signal from a trigger counting circuit 17 that takes in information from the FADE switch 10 and a camera Bose switch 11, and a signal 19 indicating the operation mode of the VTR from the VTR. Start recording.
ストップを制御する録画コントロール信号２０を発生し
、かつカメラボーズスイッチ１１の情報を取り込むモー
ド制御回路１８からの信号を取り込んで利得制御回路４
０制釧信号を発生させる。The gain control circuit 4 receives a signal from the mode control circuit 18 that generates the recording control signal 20 that controls the stop and also takes in the information of the camera Bose switch 11.
Generates a 0 system signal.
即ち、 ＶＴＲが録画待機状態でかつＦＡＤＥ用トリガ
が印加された後カメラボーズ用トリガが印加されると、
それはＦＡＤＥ ｉＡ’録画開始を意味するので、利得
を低下させる時定数を小さくシ。That is, when the VTR is in recording standby mode and the camera Bose trigger is applied after the FADE trigger is applied,
It means FADE iA' recording start, so set the time constant to reduce the gain to a small value.
利得最小になった後は徐々に利得増加する様に利得制御
信号の時定数を大きくする。又、録画状態の場合にＦＡ
ＤＥ用トリガーが印加された後のカメラボーズ用トリガ
はＦＡＤＥ ＯＵＴ録画動作であるので、利得変化の時
定数を利得低下時は大きくし利得増加時は小さくする。After the gain reaches a minimum, the time constant of the gain control signal is increased so that the gain gradually increases. Also, in the recording state, FA
Since the camera Bose trigger after the DE trigger is applied is a FADE OUT recording operation, the time constant of gain change is increased when the gain decreases and decreased when the gain increases.
上記によりＶＴＲに録画される映像レベルと期間１５の
Ａ。A of the video level and period 15 recorded on the VTR as described above.
Ｂ、Ｃの斜線部が可能となる。′更に、録画待機゛状態
で最初にカメラボーズ用トリガが印加され・、再びカメ
ラボーズ用トリガが印加されｐ場合は・斜線部り期間と
なり通常の録画動作となる。The shaded areas B and C become possible. Furthermore, if the Camera Bose trigger is first applied in the recording standby state, and then the Camera Bose trigger is applied again, the hatched period will begin and normal recording operation will begin.
−本実施例によれば、 ＦＡＤＥ録画直前まで、ＦＡＤ
Ｅ録画終了直後すぐにモニターが可能であり、録画のタ
イミングを逸すことがないという効果がある。- According to this embodiment, until just before FADE recording, FAD
E. Immediately after recording ends, monitoring is possible, which has the effect of not missing the timing of recording.
本発明ＩＣＪ： ｈハ、 ＦＡＤＥ ｉＡ’ 、 ＦＡ
ＤＥ ＯＵＴ 録画を実施しても被写体をＦＡＤＥ動作
の直前まで、。ICJ of the present invention: hha, FADE iA', FA
DE OUT Even if recording is performed, the subject will not be captured until just before the FADE operation.
直後すぐにモニターできるので、撮影者の意図。This is the photographer's intention as it can be monitored immediately.
が忠実に表現出来ることになりビデオカメラの操作性が
向上するという効果がある。can be expressed faithfully, which has the effect of improving the operability of the video camera.
第１図は従来のＦＡＤＥ機能付ビデオカメラのブロック
ダイアグラム図、第２図は第１図のタイミングチャート
図、第６図、第４図は本発明のブロックダイアグラムと
タイミングチャート図である。
４・・・利得制御回路。
９・・・制御信号発生回路。
１７・・・トリガ計数回路。
１８・・・モード制御回路。FIG. 1 is a block diagram of a conventional video camera with a FADE function, FIG. 2 is a timing chart of FIG. 1, and FIGS. 6 and 4 are a block diagram and timing chart of the present invention. 4...Gain control circuit. 9...Control signal generation circuit. 17...Trigger counting circuit. 18...Mode control circuit.
Claims (1)
Ｅ用スイッチとカメラボーズ用スイッチとを具備したビ
デオカメラに於いて、該スイッチのトリガーを計数する
トリガー計数回路とＶＴＲからの動作モードとカメラポ
ーズ用スイ・ソチとの情報を取り込みかつＶＴＲの動作
を制御するコントロール信号を発生するモード制御回路
を設けたことを特徴とするビデオカメラ。1. Gain control circuit, gain control signal generation circuit, and FAD
In a video camera equipped with a switch for E and a switch for Camera Bose, a trigger counting circuit that counts the triggers of the switch and information on the operation mode and camera pose switch from the VTR are taken in and the VTR operates. A video camera comprising a mode control circuit that generates a control signal to control the video camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58129317A JPS6021676A (en) | 1983-07-18 | 1983-07-18 | Video camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58129317A JPS6021676A (en) | 1983-07-18 | 1983-07-18 | Video camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6021676A true JPS6021676A (en) | 1985-02-04 |
Family
ID=15006583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58129317A Pending JPS6021676A (en) | 1983-07-18 | 1983-07-18 | Video camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6021676A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8901606A (en) * | 1988-06-27 | 1990-01-16 | Samsung Electronics Co Ltd | VIDEO SUPPRESSION SYSTEM FOR A VIDEO CASSETTE RECORDING DEVICE COMBINED WITH A VIDEO CAMERA. |
| FR2675940A1 (en) * | 1991-02-06 | 1992-10-30 | Hanke & Thomas Hama Hamaphot | CONTROL DEVICE ASSISTING THE SELECTED TRANSMISSION OF INFORMATION FROM A FIRST RECORDING DEVICE TO A SECOND RECORDING DEVICE, PARTICULARLY FOR VIDEO DEVICES. |
-
1983
- 1983-07-18 JP JP58129317A patent/JPS6021676A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8901606A (en) * | 1988-06-27 | 1990-01-16 | Samsung Electronics Co Ltd | VIDEO SUPPRESSION SYSTEM FOR A VIDEO CASSETTE RECORDING DEVICE COMBINED WITH A VIDEO CAMERA. |
| FR2675940A1 (en) * | 1991-02-06 | 1992-10-30 | Hanke & Thomas Hama Hamaphot | CONTROL DEVICE ASSISTING THE SELECTED TRANSMISSION OF INFORMATION FROM A FIRST RECORDING DEVICE TO A SECOND RECORDING DEVICE, PARTICULARLY FOR VIDEO DEVICES. |
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