JPH0252584A - Video signal transmitter - Google Patents

Abstract

PURPOSE:To synthesize plural video signals and their audio signals into one system, to select an optional video image from a sent signal and to attain display with magnification by providing plural video cameras and each equipment for synthesis, transmission, magnification and display of a specific video signal. CONSTITUTION:Four video signals A-D outputted from plural video cameras 1A-1D are synthesized into one system of synthesis video signal SV by a video signal synthesizer 2 and enters a communication line and a video signal transmitter 3 of a reproducing device. Then a video signal magnification device 4 selects an optional number of video signals from the signals, applies magnification/ compression in each direction and the result is displayed on the pattern of a video signal display device 5. Moreover, the audio signal together with the video signal is multiplexed and sent and the audio signal is offered simultaneously when one video image is selectively displayed. When the system is used for a burglar proof monitor system, all of the plural cameras and the magnified image of the specific part are observed optionally by one set of monitor.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention combines a plurality of video signals into a video signal for one screen, transmits the composite video signal as a composite video signal, and transmits the transmitted composite video signal to a video display device. relates to a video signal transmission device that displays one or more selected video signals as they are or only one or more selected video signals on the screen, and that when displaying the first video signal, can also reproduce a corresponding audio signal if necessary. .

[Traditional technique (hoj)]

2. Description of the Related Art Conventionally, there are devices known as monitoring devices, crime prevention devices, etc. that simultaneously observe a plurality of video signals.

For example, VT-QDl 0 type 4 newly manufactured by Hitachi Seisakusho Co., Ltd.
As described in the instruction manual for the split adapter, video signals from multiple video signal sources, such as video cameras, are combined into one screen's worth of video signals, and the combined images from the multiple cameras are displayed on one screen. I am trying to display it.

[Problem to be solved by the invention]

The above-mentioned conventional technology displays images from multiple video signal sources simultaneously on one screen of a display device. For example, when a camera is used, four images obtained by dividing the screen into four are displayed simultaneously. However, there was a problem in that it was not possible to enlarge and display only the image of one specific camera.

An object of the present invention is to combine video signals from a plurality of video signal sources into a video signal for one screen of a display device, transmit it as one system of video signals, and display the transmitted composite video signal as it is on one screen. In addition to displaying, it also selects one or more video signals from the above composite video signals,
An object of the present invention is to provide a video signal transmission device that displays this as an enlarged image on a display device.

Another object of the present invention is to record a plurality of video signals or a plurality of video signals and their audio signals, and selectively reproduce and display one or more of the recorded video signals or video signals and audio signals. An object of the present invention is to provide a video signal transmission device that can enlarge and display images on the screen of the device.

[Means to solve the problem]

The above object is to provide a video signal synthesizing means for synthesizing video signals from a plurality of video signal sources into a video signal for one screen of a display device to form one system of video signals, and a video signal transmitter for transmitting the synthesized composite video signal. This is accomplished by comprising a video signal enlarging means for selecting one or more video signals from the transmitted composite video signal and enlarging and displaying the selected video signal on the screen of the display device.

[Effect]

The video signal synthesizing means combines the video signals of the plurality of video signal sources into a video signal for one screen of the display screen to form one system of video signals, and transmits the synthesized composite video signal by the video transmitting means. One or more video signals are selected by the video signal enlarging means from the transmitted composite video signal and displayed on both sides of the display device. Note that it is also possible to display the composite video signal as it is on the screen at the same time by splitting the screen.

Furthermore, a video tape recorder (VTR) or a video disc is used as the video transmission means, and the composite video signal is recorded on the video tape or video disc, and when the composite video signal is played back, a specific video signal is selected and played back. You can also do it like this.

〔Example〕

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

FIG. 1 is a block diagram of an embodiment of the present invention.

IB, 1c, and ID are video cameras, 2 is a video signal synthesis device, 3 is a video signal transmission device, 4 is a video signal enlargement device, and 5 is a video signal display device (monitor).

In the figure, a plurality of video cameras IA, IBIC:
Four video signals A and B are output from 10.

In C and D, four video signals are combined into one system of video signals for one screen by a video signal synthesis device 2. The combined composite video signal SV is given to the video signal transmission device 3. The video signal transmission device 3 is a multiplex transmission cable, a communication line such as a telephone line, a VTR, a video disc, or other recording/playback device or playback device.

From the composite video signal SV transmitted through the video signal transmission device 3, one video signal, for example, the video signal A of the video camera IA, is selected by the video enlarging device 4, and is enlarged and displayed on the screen of the display device 5. be done. The video signal enlarging device can display not only one video signal, but also all two, three, or four video signals A to D.

Furthermore, not only the video signal but also each audio signal can be multiplexed and transmitted simultaneously with the video signal. Furthermore, when one video signal is selected and displayed, it is also possible to simultaneously provide its audio.

In the above, when displaying video signals on two sides at the same time, the display on the screen of the display device is compressed in the vertical direction,
Any of horizontally enlarged display, horizontally compressed display, and vertically enlarged display may be used. In addition, when performing four displays, it is easier to display the screen with a 2×2 equal valve υ1.

According to the above embodiment, in a crime prevention system, a surveillance system, etc. that uses a plurality of video cameras, only one video signal display device is required as a surveillance monitor, and this monitor can display images from all of the multiple video cameras. , it is also possible to arbitrarily select and observe images from a specific video camera.

In Figure 2, a VTR is used as the video signal transmission device.

IA and IB are explanatory diagrams of a device for recording video signals from a plurality of video cameras on this VTR.

IC, ID is a video camera, 2 is a video signal synthesis device, 5
is a monitor and 30 is a VTR.

In the figure, the video signal output from the video camera IA-ID is input to the video signal synthesis device 2, and one of each video signal is input to the video signal synthesis device 2.
The screens (here, a total of four screens) are multiplexed into one screen using, for example, compression technology and combined into one system of video signals. The combined video signal is input to the VTR 30 and recorded on a magnetic tape. Note that audio signals can also be multiplexed and recorded as necessary.

At this time, the state of the combined video signal and audio signal is observed on the monitor 5.

FIG. 3 is an explanatory diagram of a device for reproducing the magnetic tape recorded in FIG. 2, in which 4 is a video signal enlarging device, 5 is a video display device (monitor), and 30 is a VTR.

In the same figure, the magnetic tape recorded in FIG.
TR30, and the reproduced video signal (synthesized video signal) is given to the video signal enlarger 4, and only one of the video signals, for example, the video signal A obtained from the video camera 1Δ in FIG. 2, is displayed as a video signal. Display on device 5. At this time, if an audio signal is also recorded, the audio signal corresponding to the video signal to be displayed can be played back at the same time.

Furthermore, not only one video signal, but two or more video signals can be displayed simultaneously. The display of multiple video signals is the same as that described in FIG. 1 above.

FIG. 4 is an explanatory diagram of another embodiment of the present invention using a magnetic recording/reproducing device having a video signal synthesis function, a recording/reproducing function, and a video signal enlargement function, and shows IA, 113. IC,
ID is a video camera, 8 is a functional part of the video signal synthesis device 20, a functional part of the video signal expansion device 4, and a recording/reproducing device 30.
□A magnetic recording/reproducing device with a built-in function part, and 5 is a video display device.

In the figure, video signals from video cameras IA to ID are supplied to a video display device 5 via a magnetic recording/reproducing device 8. At this time, the video signals from the video camera 18 to ID may be displayed on the video display device 5 while being recorded.
It may be played back at any time after recording.

FIG. 5 is a fourth explanation of still another embodiment of the present invention using a video desk and a TV broadcast signal as the video signal source,
9 is a TV tuner 1 attached to the magnetic recording/reproducing device in FIG.
1 is a magnetic recording and reproducing device, 12 is a video disc player, 50 is a TV receiver equipped with a TV tuner 10,
The same symbols as in FIG. 4 correspond to the same parts.

In the figure, the video signal sources of the magnetic recording/reproducing device 9 include its own TV tuner 11 and the tuner 1 of the TV receiver.
0 and each output of the video disc player 12,
A plurality of video signals from each of these video signal sources are synthesized in the video signal synthesis device 2, and one or more of the plurality of video signals is displayed on the TV receiver 50 in the same manner as in FIG.

FIG. 6 is an explanatory diagram of yet another embodiment of the present invention using a video disc on which a composite video signal is recorded as a video signal source, in which 120 is a video disc player, 4 is a video signal enlarging device, and 5 is a video disc player. It's a monitor.

In the figure, when a video disc player 120 plays a normal video disc, it displays the playback signal on the monitor 5 without enlarging the signal through a video signal enlarging device. When the video disc player 120 plays back a video disc recorded by combining a plurality of video signals using a video signal synthesizing device in the same manner as in the above embodiment, the played composite video signal is used to play the normal video disc. Not only can they be displayed simultaneously on the screen of the monitor 5, but also one or two video signals above the composite video signal can be selected and displayed in an enlarged manner. Note that the audio signals can also be multiplexed and recorded in the same manner as described above, and the corresponding audio can be played back when one video signal is enlarged and displayed.

By doing so, it is possible to record a plurality of programs and the like on a video disc in a number several times larger than in the past.

FIG. 7 is an explanatory diagram of yet another embodiment,
■ is a video camera, 30 is a VTR, 100 is a TV tuner, 120 is a video disc player, 2 is a video signal synthesis device, 4.4', 4'' is a video signal expansion device, 5.5
", 5" is a monitor.

In the figure, a plurality of video signals synthesized by a video signal synthesis device 2 are selected through video signal expansion devices 4.4' and 4'' and displayed on respective monitors 5 and 5.5''. It is also possible to display all video signals on each monitor.

FIG. 8 is an explanatory diagram of the display mode of multiple images on the screen of a video display device (monitor), in which (a) shows two images divided and displayed horizontally, and (b) shows two images displayed vertically. (C) shows a state in which three images are displayed vertically, and (d) shows a state in which thirteen images are displayed in a divided manner.

If the aspect ratio of the unit video on the display screen changes drastically, the video signal expansion device 8.8', 8'' can perform signal compression/expansion processing to make the screen easier to view.

〔Effect of the invention〕

As explained above, according to the present invention, (a) a plurality of video signals and audio signals are transmitted at once;

All of the transmitted multiple video signals simultaneously or -
Alternatively, by selecting two higher video signals and creating an enlarged screen, when one video signal is displayed, its audio can also be played back and displayed at the same time. (b) By using a recording device as a transmission device, it is possible to record a plurality of video signals and audio signals at once, and enlarge and display all or a selected one or two of them as necessary; Recording efficiency can be improved. It is possible to solve the problems of the prior art and provide a video signal transmission device with excellent functions.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram of recording multiple video signals, FIG. 3 is an explanatory diagram of selective enlargement playback of multiple video signals, and FIG. 4 is an illustration of another embodiment of the present invention. FIG. 5 is an explanatory diagram of yet another embodiment of the present invention; FIG. 6 is an explanatory diagram of yet another embodiment of the present invention; FIG. 7 is an explanatory diagram of still another embodiment of the present invention. FIG. 8 is an explanatory diagram of a display mode of a plurality of images. ■A~ID-video camera, 2--video signal synthesis device, video signal transmission device, video signal enlargement diagram device, video signal display device. Figure 2 Figure 4 Figure 7 u Figure 5 Figure 8 (b) <C> (d) Figure 6

Claims (1)

[Claims] 1. Each video signal from a plurality of video signal sources is transmitted as a composite video signal for one screen, and one or more of the video signals constituting the transmitted composite video signal are transmitted. In a video signal transmission device that displays a selected video signal as an image, a video signal synthesis device that combines each screen of the plurality of video signals into a video signal for one screen to form one system of video signals; , a video signal transmission device that transmits a composite video signal synthesized by this video signal synthesis device, a video display device that displays the transmitted composite video signal on a screen, and a composite video signal transmitted by the video signal transmission device. and a video signal enlarging device for displaying one or more video signals constituting the video signal as one screen worth of images on the screen of the video display device, wherein one or two of the video signals from the plurality of video signal sources A video signal transmission device characterized in that the video signal transmission device is configured to display the video signal selected above on the screen of the video display device. 2. In claim 1, the video signal synthesizing device includes audio signal synthesizing means for synthesizing audio signals corresponding to the plurality of video signal sources, and the video signal enlarging device combines the synthesized signals transmitted by the video signal transmitting device. One video signal is selected from the video signals, and one audio signal corresponding to the one video signal is selected and reproduced from the plurality of sounds synthesized by the audio synthesizing means, and the audio is produced simultaneously with the display of the one video signal. A video signal transmission device characterized by having a configuration for reproducing. 3. In claim 1, the video signal transmission device is a magnetic recording and reproducing device, and records the composite video signal synthesized by the video signal synthesis device, and also reproduces and displays it on the screen of the video display device. A video signal transmission device characterized by having a configuration in which: 4. In claim 2, the magnetic recording device includes means for recording and reproducing, together with the composite video signal, an audio signal corresponding to each video signal constituting the composite video signal, and the video signal enlarging device allows one video signal to be reproduced. 1. A video signal transmission device characterized in that, when selecting and displaying on the screen of the video display device, the corresponding audio signals are simultaneously played back.