JPS60210077A - Display device for synthesization of television screen - Google Patents

Abstract

PURPOSE:To perform the synthesization of screens simply and at a high speed by controlling the shift phase for scan start timing of a large scan surface between cameras which obtain divided surfaces adjacent to each other so that said shift phase is limited within a horizontal period and a vertical period respectively. CONSTITUTION:A standard image pickup scan area 122 is set to a faceplate 121 of an image pickup tube 12 of a video camera 11A. This area 122 is used when the camera 11A and a monitor are used in 1:1 correspondence. When a system is changed to a division mode, the area 122 is enlarged to an area 123 having a size obtained by multiplying the standard scan area by the number of divisions with no change of cycles TH and TV. So is with cameras 11B, 11C and 11D respectively. Then the shift phase for scan start timing of an enlarged scan surface between cameras which obtain divided surfaces adjacent to each other is limited within 1H period and 1V period in the horizontal and vertical scan directions respectively with the outputs of gate pulse generating circuits for control signal generating circuits 17A-17D.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a television screen synthesis display device, which is improved so that screen synthesis can be performed using a simple method and high-speed signal processing.

[Technical background of the invention and its problems]

Television footage captured by multiple television cameras/
If the signal is to be displayed on one screen, a telepino N/screen composition device is required. In conventional screen compositing methods, multiple (
, ) video signals from television cameras are stored in n image memories, respectively. Next, the data in each image memory is thinned out to 9 and written into the memory for one screen. Conversion processing for the number of lines and scanning lines is performed. Next, a method is adopted in which data for one screen of the memory is read out and displayed. Therefore, the image captured by each video camera is displayed on the screen in a size of 17n.

In the conventional screen composition method described above, complicated signal processing is performed in order to display images from a plurality of television cameras on one screen. This requires expensive analog-to-digital converters and a lot of frame memory. Furthermore, data writing and reading processes take time, and signal processing may not be able to keep up with fast-moving moving images.

Also, in order to simplify the structure, if you try to simply sample the video signals from n cameras using dart signals and combine them to create a composite image on one screen, the information of each television camera will be missing, and - Only the amount of information corresponding to the area of can be displayed.

[Purpose of the invention]

This invention was made to deal with the above-mentioned situation, and it is possible to easily obtain divided images on one screen by simply adjusting the scanning area of multiple TV cameras and the synchronization pulse of each camera. An object of the present invention is to provide a TV screen composition display device that exhibits the same tracking performance as a normal television system even for fast-moving moving images, and that does not cause loss of information from each camera. shall be.

[Embodiments of the invention] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an embodiment of the present invention, and shows a system capable of synthesizing video signals from four video cameras zzhs JIB, IIC, and IID. Video camera IIk
The image pickup tube 12 has an image pickup tube 12, a high voltage circuit 13 for applying a high voltage to the image pickup tube 12, a deflection circuit 14, and a deflection width switching circuit 15 that can switch the deflection width. Further, the signal read out from the imaging screen is amplified by the amplification circuit 16,
It is input to the camera control device 20 side. Video camera Il
Although we have explained the structure of
~IID also has a similar configuration.

The camera control device 20 includes each video camera 11A.

Control signal generation circuit J corresponding to JIB, IIC, 11D
It has 7A, 77B, 17C, and JFD. The control signal generation circuit J7A includes a first delay and waveform manipulation circuit 21 that manipulates the delay and waveform of the horizontal deflection signal using the horizontal synchronization pulse H, and a first delay and waveform manipulation circuit 21 that manipulates the delay and waveform of the horizontal deflection signal using the vertical synchronization pulse H. It has a second delay and waveform manipulation circuit 22 for manipulating the waveform. Further, the imaging signal input from the video camera IIA is sent to the cable compensation circuit 25 and the video signal dirt circuit 2.
The pulse signal is introduced into the video signal synthesis circuit 30 via the pulse signal generator 6, and has a pulse generation circuit 27 for generating the dirt pulse at this time.

Said 1st. The output signals of the second delay and waveform manipulation circuits 21 and 22 are input to the deflection width switching circuit 15 via amplifier circuits 23 and 24, respectively, to control the timing and amplitude of the deflection signal.

The horizontal and vertical synchronization pulses H and V are generated by the synchronization signal generation circuit 3.
It is introduced from 1. Further, the horizontal and vertical synchronizing pulses H and V are also used as basic timing pulses for the dirt cruise generating circuit 27.

As mentioned above, according to the present invention, the video camera IIk
The image pickup tube 12 can switch its scanning area. To switch the scanning area of the imaging screen, the amplitude of the deflection signal is controlled. The amplitude control information is the first one. Second
The mode switching circuit 3 is added to the delay and waveform manipulation circuits 21 and 22.
This is obtained by applying the switching signal SW from 2 to 2. The mode switching circuit 32 also provides the dirt pulse generating circuit 27 with information for setting the f-) pulse generation timing.

Although the above description is about the control signal generation circuit 17A, the other circuits 17B to 17D have similar configurations.

Next, the control operation on the video camera ZZA side will be explained as a representative example. FIG. 2 shows the 7 ace plate 121 of the image pickup tube 12.
A standard imaging scanning area 122 is set on this face plate 121. Normally, when a video camera and a monitor are used in a one-to-one relationship, this imaging scanning area 122 is used to perform a predetermined line-sequential scanning. Next, when the system is switched to split mode, the imaging scanning area is expanded to area 123. In this case, horizontal scanning timing pulse I (PA
, the frequency of the vertical scanning timing pulse VPA does not change.

Therefore, the periods TH and TV do not change when the area 122 is scanned or when the area 123 is scanned. The scanning frequency remains the same both horizontally and vertically, and only the deflection width is changed by 2.
When magnified twice, the scanning area becomes four times the standard scanning area. This means that if the video signal of the standard scanning area 122 is extracted, the resulting screen area on the monitor can be reduced by 1/4, although the scanning frequency remains the same. .

FIG. 3 shows the relationship between the scanning timing pulses of the video cameras JZA to 11D, centering on the video camera JJA. horizontal scanning timing pulse HPA,
HPB, ) IPC and HPD are connected to the video camera 11, IIB and IIC, respectively.

11D, vertical scanning timing VPA,
VPB, VPC, and VPD are also for Rechteo cameras ZJA, JIB, IIC, and 11D, respectively.

Horizontal scanning timing i'? Lus HPB.

HPD is horizontal scanning timing pulse HPA, RPC
is delayed by one horizontal period. Also, the vertical scanning timing pulses VPC and VPD are the vertical scanning timing pulses J? VPA and VPB are delayed by °CT vertical period.

Furthermore, the horizontal dart pulse HGZ is generated by the control signal generation circuit 1.
1, 17C goo) 1? The horizontal dart pulse HG2 is a pulse generated by each of the dart pulse generation circuits of the control signal generation circuits 77B and 17D. Also, vertical dart pulse VGI iJ:, control signal generation circuits Z7A, 77B e
- Pulses generated by the top pulse generation circuit.
Tono4rus VG2 is a control signal generation circuit 17C917D
These are the pulses generated by each dart pulse generation circuit. Each j''-) pulse generation circuit performs an AND operation on the horizontal and vertical f-) pulses, and when the conditions reach a predetermined timing, generates a dart pulse to make the video signal conductive. Output.

On the other hand, the horizontal synchronizing pulse, the vertical synchronizing pulse VY, and the timing pulse used on the display device side. Therefore, 11 people for each video camera.

Images A, B, C, and D of one screen obtained from the standard areas 11B, IIC, and 11D are arranged as divided images on one screen 4o on the monitor side, as shown in FIG.

In the above embodiment, the monitor screen is divided into four to display the output of each television camera, but the number of divisions is not limited to this, and the present invention divides the output of multiple television cameras into one screen. Can be used when displaying.

FIGS. 5 and 6 respectively show examples of screen composition of outputs from two television cameras.

The camera 41 in FIG. 5 has an enlarged scanning plane 4 at 41B.
2, 42B is enlarged to twice the area of standard scanning surfaces 4.9A and 43B without changing the scanning frequency. In this case, only the amplitude of the horizontal scanning deflection signal is expanded. In addition, the camera 4ZA is set so that the standard scanning plane 43A is the right half of the enlarged scanning plane 42A.
A horizontal synchronizing pulse 44A is applied to the camera 4JB, and a synchronizing pulse 44B is applied to the camera 4JB so that the standard scanning plane 43B is located on the right half of the enlarged scanning plane 42B. In the case of such an operation, the standard scanning plane 43A,
Images A and B from 43B are displayed separately on the left and right. The start position of the horizontal synchronization pulse 45 of the monitor is located in the TH (horizontal period) of the synchronization pulse 44A. In this example, the enlarged scanning planes 42A, 42 of each camera are
This is an example in which the phases of the start positions a and b of surface scanning of B are shifted to the maximum IH.

In the example of FIG. 6, there are 92 screens A in the vertical direction.

This is an example in which B is displayed. In the camera 41, the enlarged scanning planes 52A and 52B of 41B are connected to the standard scanning planes 43A and 4, respectively.
3B are positioned in the upper half. At this time, the vertical synchronization pulse 53 of camera 4ZA
The vertical synchronization pulse 53B of the camera 41B is delayed by HV (V: vertical period) with respect to the vertical synchronization pulse 54. In this case, the aspect ratio of the displayed image will be different from the actual one, but if you want to see the same ratio as the actual one,
You can also adjust it on the monitor side. In this case, this can be done by using a frame memory or by changing the deflection width.

The method of setting the enlarged scanning plane in Figures 5 and 6 shows a particularly extreme example, but in reality, it is more convenient for the deflection circuit to set the enlarged scanning plane around the standard scanning plane. good.

〔Effect of the invention〕

According to the above-mentioned invention, a video signal for a split screen can be easily obtained by setting the phase of the synchronous pulse and the amplitude of the deflection signal without using a large number of field memories and analog-to-digital converters as in the past. be able to. Further, since real-time divided video signals are obtained without performing complicated r-video processing as in the past, there is no problem even with fast-moving moving images.

In addition, it is possible to synthesize and display information from each camera without missing information, which is extremely effective when used in an inspection system.

[Brief explanation of drawings]

FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram showing a method for forming an enlarged scanning surface of a circuit of this invention, and FIGS. 3 and 4 are the circuits of FIG. 2, respectively. FIGS. 5 and 6 are explanatory diagrams for explaining the operation of other embodiments of the present invention, respectively. ZZA~11D... Video camera, 12... Image pickup tube, 13... High voltage circuit, I4... Deflection circuit, 15...
- Deflection width switching circuit, 171 to Z7D... Control signal generation. Main circuit, 21.22...Delay and waveform manipulation circuit, 26
...Video signal dirt circuit, 27...Dirt pulse generation circuit. Figure 2; Figure 4 Figure 5

Claims (1)

[Scope of Claim] A television screen composite display device that divides one screen of a television monitor and displays images from television cameras corresponding to mantissas on each divided screen, comprising: means for enlarging the surface to an enlarged scanning surface having a width equal to the standard scanning area, which is the imaging surface of the camera, multiplied by the number of divisions without changing the scanning frequency; and means for applying a synchronization pulse to each of the television cameras so that the shift phase of the scanning start timing of the enlarged scanning plane between them is within one horizontal period in the horizontal scanning direction and within one vertical period in the vertical scanning direction. A television screen composite display device characterized by: