JPH0393366A - Television camera equipment - Google Patents

Abstract

PURPOSE:To display plural external input video signals simultaneously on one screen of a picture display monitor with split by adding a picture synthesis means so as to apply processings such as time axis compression, delay, gate processing and mixture. CONSTITUTION:Video signals A2, B2, C3, D3 subject to time axis compression, delay and gate processing or the like are subtracted with respective synchronizing signals and blanking signals at a mixing circuit 37 and the resulting signals are added and a regular synchronizing signal and blanking signal are added as one video signal into a signal E. The mixed video signal E is selected by a changeover circuit 39 with any of external input video signals A, B, C, D for individual display selected by a changeover circuit 38 into a switchback video signal F. A control signal G for the changeover circuits 38,39 is controlled from a camera head side by a camera man and the changeover circuits 38, 39 are switched synchronously with a vertical synchronizing signal. When the mixed video signal E is selected by the changeover circuit 39, pictures of A, B, C, D signals are displayed on a picture display monitor simultaneously with 4-split.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an improvement in a television camera device having a function of appropriately switching between an external input video signal and a video signal of the television camera and displaying the screen. .

[Conventional technology]

FIG. 3 shows an example of the configuration of a television camera system, in which a video signal captured by a camera head 1 is sent to a video signal processing unit 3 through a camera cable 2, and the signal is
The signal is processed within the video signal processing unit 3 so that it is output from the camera system as a signal that conforms to the standards of external equipment such as a TR.

Now, in addition to displaying and monitoring the video signal of the camera that the cameraman is operating on the image display monitor (viewfinder) 4 attached to the camera head 1, the cameraman also monitors other cameras or - It is necessary to select and monitor video signals such as air.

For this reason, conventionally, as shown in Figure 2, one or more external input video signals (A, B, C, D in the example shown) are input to the video signal processing unit 3 of the camera, and these signals are processed. The signal is selected and switched using the control signal G synchronized with the vertical synchronization signal (normally, the cameraman generates the switching control signal in the camera head 1 and synchronizes it with the vertical synchronization signal in the video signal processing unit 3), and the corresponding signal is connected in the camera cable 2. The single video signal after selection switching is sent and sent back to camera head 1 and transmitted as video signal F. The video signal F sent back to camera head 1 is appropriately switched with the video signal of the camera in question (this switching 0), which may be performed by the signal processing unit 3, and displayed on the image display monitor (viewfinder) 4 in FIG.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, the image display monitor (viewfinder) attached to the camera head displays only the video signal of the television camera or one of the externally input video signals alone or in a simple superposition. I can't,
The selection switching operation is complicated, there is a time loss as the selections are made sequentially, and the operability is poor.The present invention aims to solve these drawbacks by displaying a plurality of externally input video signals in an image display mode. The purpose is to enable simultaneous display on one screen divided into multiple parts on a monitor.

[Means and operations for solving the problems] In order to achieve the above object, the present invention includes a video signal processing unit that includes:
As shown in Fig. 1(a), an image synthesis means is added, and the means performs processing such as time axis compression, delay, gate processing, mixing, etc. on multiple external input video signals using digital video processing technology. By doing so, as shown in Figure 1(b), the image display monitor attached to the camera head (
This allows multiple external input video signals to be divided and displayed simultaneously on a single screen (viewfinder).

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 4. In FIG. 1(a), 31 is an external input video signal A
, B's time axis compression circuit reduces the time axis of external human input video signals A and B to 1/2 by digitized video signal processing, etc.
Compress it into 32 is a video gate circuit;
It is controlled by a gate pulse generation circuit 33. 34 is a delay circuit that delays the video signal by 1/2 vertical scanning period;
5 is a video signal time-base compression circuit having the same function as the time-base compression circuit 31, 36 is a gate circuit having the same function as the gate circuit 32, and 37 is a circuit for four external input video signals A.
, B, C, and D on the time axis and distributes four video signals on one screen. Reference numerals 38 and 39 are video signal switching circuits.

FIG. 1(b) is an example of simultaneous display of the four video signals synthesized in FIG. 1(a) on an image display monitor (Be-finder) screen. Figure 4 shows the state of each part of the video signal during processing in the image synthesis block of Figure 1(a) (Figure 1(a)).
Displays in a) A, AI, A2, B, Bl, B
2,・・・・・・・・・・・・D, DI, D2,
This operation will be explained below. The time axis of external input video signals A and B is compressed to 172 by a time axis compression circuit 31, and becomes video signals AI and Bl, respectively. These signals AI and Bl are input to the gate circuit 32, and the signal AI is input to every odd number,
For signal B1, every even-numbered horizontal video signal (time-compressed to 1/2) is extracted, and signals A2 and B are obtained, respectively.
It becomes 2. The gate pulse generation circuit 33 is synchronized with the horizontal synchronizing signal (of course, it is also synchronized with the video signals A and H), and corresponds to gate signals for extracting the odd-numbered horizontal video signals of the signal A and the even-numbered horizontal video signals of the signal B1, respectively. Gate circuit 32
give each.

On the other hand, the external input video signals C and D are processed by the delay circuit 34.
Delayed by 1/2 vertical scanning period, the signals Cl, D] are obtained.
The time axis is compressed to 1/2 by the time axis compression circuit 35,
The signals C2 and D2 are inputted to the gate circuit 36, and the signal C2 is extracted from each odd numbered horizontal video signal, and the signal D2 is extracted from every even numbered horizontal video signal (time-compressed to 1/2), and the signals C3 and D2 are extracted, respectively. It becomes D3. Video signals A2, B2, C3, D3 that have been subjected to time axis compression, delay, gate processing, etc.
The mixing circuit 37 removes the individual synchronization signals and blanking signals, adds them together, adds the regular synchronization signal and blanking signal as one video signal, and becomes the signal E. This mixed video signal E is the external input video signal A for individual display selected by the switching circuit 38 by the switching circuit 39.
, B, C, or D, and the selected one becomes the sent-back video signal F. Here, the switching circuit 38.
The control signal G of 39 can be controlled by the cameraman from the camera head side, and can be controlled by the switching circuit 38.39.
switches in synchronization with the vertical synchronization signal. Switching circuit 39
Therefore, when mixed video signal E is selected, images A, B, C, and D are divided into four parts and can be displayed simultaneously on the image display monitor (viewfinder) as shown in Figure 1 (b). .

(Effects of the Invention and Ideas) According to the present invention, image composition can be performed relatively easily by adding some additional improvements to the hardware and software of the video processing unit of a television camera that uses digital signal processing. , multiple video signals such as external video equipment and on-air video signals can be displayed simultaneously on the camera head's image display monitor (viewfinder) by dividing the screen, further improving the operability of the camera.

[Brief explanation of drawings]

FIG. 3 is a configuration diagram of a general television camera system, FIG. 2 is a diagram for explaining a conventional external input video signal monitoring system, and FIG. 1(a) is a configuration diagram of an embodiment of the present invention. FIG. 1(b) is a block diagram showing the display state of image synthesis, and FIG. 4 is a timing chart showing waveforms of each part of the system of the present invention. 31.35 is a time axis compression circuit, 32.36 is a video signal gate circuit, 3
3 is a gate pulse generation circuit, 34 is a video signal delay circuit, 37 is a video signal mixing circuit, 38, 39 are video signal switching circuits, A, B, C, and D are external input video signals, and F is an external input video signal. The return video signal G is a control signal for switching the switching circuits 38 and 39. Volume 2 Figure Hori 4 Figure 1 Jt completed i-1ft translation--11-ya

Claims (1)

[Claims] 1. In a television camera having an image display monitor means for switching and displaying the video signal of the television camera and at least one external input video signal on the screen, the video signal of the television camera and at least one
Means is provided to select a desired number of video signals from among the two externally input video signals and synthesize these selected video signals into one screen by time axis compression, delay, gate processing, etc., and the image display monitor means selects the above as appropriate. A television camera device characterized by displaying a screen-split composite image of video signals.