JPH08205030A - Multi-screen display device - Google Patents

Abstract

PURPOSE: To provide a multi-screen display device not disturbing video recording image even when an input image is selected with mischief by applying selection control to a video signal outputted to a video recording output section and a monitor output section. CONSTITUTION: This display device is provided with an input section 1 receiving a video signal from a camera or the like, an A/D converter section 2 converting the video signal into a digital signal, a multi-screen processing section 3 applying image compression to plural digital video signals to be displayed on a screen separately, a D/A converter section 4 converting the multi-screen signal into an analog signal, plural switchers 5 selecting plural video signals from the input section 1 and a signal from the D/A converter section 4 and providing an output, plural output sections 6 providing a signal from the plural switchers 5 to a monitor 20a and a VTR 20b or the like and a switcher control section 7 controlling separately the plural switchers 5 and an input video signal and a multi-screen signal are selected for each output section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-screen display device, and more particularly to a multi-screen processed multi-screen signal,
The present invention relates to selecting each input video signal for each output.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional multi-screen display device has a recording output section for outputting a multi-screen signal subjected to multi-screen processing and a monitor output for selectively outputting a plurality of input video signals and multi-screen signals. The department was established.
Therefore, when the VTR is connected to the recording output section, it is not possible to record each input video signal, and
When the monitor and the VTR are connected to the monitor output section, the recording signal is the same as the monitor signal, so that there is a problem that an image manually monitored by the mischief is also recorded.

[0003]

SUMMARY OF THE INVENTION The present invention solves the problems described above, and the video signals to be output to the recording output section and the monitor output section can be individually selected and controlled, and the input screen can be switched mischievously. Another object is to provide a multi-screen display device that does not disturb recorded video.

[0004]

In order to solve the above problems, the present invention provides an input unit for inputting a plurality of video signals from a camera or the like, and a plurality of units for converting the plurality of video signals from the input unit into digital signals. A / D conversion unit, a multi-screen processing unit that compresses a plurality of digital video signals from the A / D conversion unit to display a plurality of images on one screen, and a multi-screen processing unit A D / A converter for converting a screen signal into an analog video signal; a plurality of switchers for selecting and outputting a plurality of video signals from the input unit and an analog multi-screen signal from the D / A converter; It comprises a plurality of output units for outputting signals from a plurality of switchers to a recording device such as a monitor device and a VTR, and a switcher control unit for separately controlling the plurality of switchers. So that switch separately for each output unit an image signal and a multi-screen signal.

[0005]

With the above construction, according to the multi-screen display device of the present invention, the selection of the video signal to be output to the monitor output part and the video signal to be output to the recording output part to the recording device such as the VTR. Since the selection can be controlled separately, even if a video signal to be mischievously selected is selected, recording can be performed in the set recording mode without affecting the recording output section.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-screen display device according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a multi-screen display device according to the present invention. In the figure, reference numeral 1 is an input unit, which inputs video signals from a plurality of cameras 10 or the like. Reference numeral 2 denotes a plurality of A / D conversion units, which convert the video signal from the input unit into a digital signal. A multi-screen processing unit 3 includes a video storage unit 31 that stores digital video signals from the plurality of A / D conversion units 2 for each input video signal, and a read control unit that outputs an address signal read from the video storage unit. 32, and the VRAM for storing the digital video signal read from the video storage unit and reading it with a dot clock synchronized with a synchronizing signal
33. Reference numeral 4 denotes a D / A conversion unit that converts the digital multi-screen signal from the multi-screen processing unit 3 into an analog signal. A switcher 5 includes a monitor output switcher 5a and a recording output switcher 5b. An output unit 6 is the monitor output switcher 5a.
A monitor output section 6a for inputting a selected video signal from the monitor 20a to the monitor 20a and a video recording output section 6b for inputting a selected video signal from the recording switcher 5b to the VTR 20b. Reference numeral 7 denotes a switcher control unit, which is the monitor output switcher 5a and the recording switcher 5b.
Are controlled independently. An operation unit 8 inputs a control mode to the switcher control unit 7 and the read control unit 32.

The operation of the above arrangement will be described below. The plurality of video signals input from the input unit 1 are converted into digital video signals by the A / D conversion unit and stored in the video storage unit 31 at each end. The operator inputs a read mode such as at which position on the screen the input video signal is displayed by operating the operation unit, and how large the image signal is, and the like. The multi-screen signal stored in the VRAM 33 is read in synchronization with a predetermined synchronization signal by sequentially reading out the video storage unit at predetermined thinning intervals according to the input read mode to generate a multi-screen signal and storing the multi-screen signal in the VRAM 33. , D / A converter 4 converts into an analog video signal,
It is input to the monitor output switcher 5a and the recording output switcher 5b. The input video signals are also input to the monitor switcher 5a and the recording switcher 5b. The operator operates the operation unit 8 to input the switching mode of the monitor output switcher and the recording output switcher, and controls the monitor output switcher and the recording output switcher based on this switching mode. There is. The read mode and the switching mode input from the operation unit 8 are stored in the mode storage unit provided in each control unit.

[0008]

As described above, according to the multi-screen display device of the present invention, the selection of the video signal to be output to the monitor output section and the video signal to be output to the recording output section of the recording device such as the VTR. Since the selection can be controlled separately, even if a video signal to be monitored by a mischief is selected, it does not affect the recording output section and can be recorded in the set recording mode. It is possible to provide a multi-screen display device that does not disturb recorded video even when switching.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a multi-screen display device according to the present invention.

FIG. 2 is a block diagram of a conventional multi-screen display device.

[Explanation of symbols]

 1 Input unit 2 A / D conversion unit 3 Multi-screen processing unit 4 D / A conversion unit 5 Switcher 5a Monitor output switcher 5b Rokuga output switcher 6 Output unit 6a Monitor output unit 6b Recording output unit 7 Switcher control unit 8 Operation Part 10 Camera, etc. 20a Monitor 20b VTR 31 Video storage part 32 Read control part 33 VRAM

Claims (4)

[Claims] 1. An input unit for inputting a plurality of video signals from a camera or the like, a plurality of A / D conversion units for converting a plurality of video signals from the input units into digital signals, and an A / D conversion unit. A multi-screen processing unit for image-compressing the plurality of digital video signals to display a plurality of images on one screen, and a D / A conversion unit for converting the multi-screen signals from the multi-screen processing unit into analog video signals. A plurality of switchers for selecting and outputting a plurality of video signals from the input section and an analog multi-screen signal from the D / A conversion section, and a recording apparatus such as a monitor or VTR for the signals from the plurality of switchers Etc., and a switcher control unit that controls the plurality of switchers separately, and switches the plurality of input video signals and multi-screen signals separately for each output unit. A multi-screen display device characterized by the above. 2. The multi-screen processing unit is configured to control the plurality of A's.
A video storage unit that stores signals from the D / D conversion unit, a read control unit that controls reading by designating a read position from the video storage unit, and temporarily stores the multi-screen signal read from the video storage unit. 2. The multi-screen display device according to claim 1, wherein the multi-screen display device comprises a VRAM for reading with a clock signal synchronized with a synchronization signal. 3. The multi-screen display device according to claim 1, wherein an operation unit for inputting a read procedure and the like is connected to the read control unit. 4. The multi-screen display device according to claim 1, wherein an operation unit for inputting a control mode is connected to the switcher control unit.