JPH1098708A - Video monitor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to send out a video signal output generated by superposing a title signal on an output video signal by arranging a matrix switch and a specific number of on-screen controllers for its output together with a buffer memory which has a temporary storage function for a display data signal. SOLUTION: A matrix switch 2 and a on-screen controllers 3 which are as many as or less than output video signals are united, and the on-screen controllers 3 are arranged on the output side of the matrix switch 2 together with the buffer memory 4. Then the buffer memory 4 stores temporarily the display data sent in series from a control part and when video signals are switched, the data are transferred to the respective on-screen controllers 3. Consequently, the video input signals are optionally switched at the same time and the video signal output generated by superposing a title signal of characters, figures, etc., on output signals can be sent out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video monitoring apparatus which selects a plurality of input video signals, transmits a plurality of output video signals, and superimposes a title signal such as a character or a figure on each output video signal. .

[0002]

2. Description of the Related Art In the field of video surveillance, a large number of cameras are installed at monitored sites, while at a surveillance center, signals from the cameras are arbitrarily switched and displayed on a plurality of monitors and recorded by a recording device. doing. On the display screen, a title image of characters and figures such as a camera number, an installation location layout, a date and time, and a state are displayed together with an image of the monitored location. Conventionally, when characters and figures are superimposed on a video and displayed, as shown in FIG. 5, one input is applied to the matrix switch 3 of the video signal switch and one input to the input side.
A method is employed in which a plurality of titlers (2a to 2n) or the like are combined, or one is provided for each output as shown in FIG. The former is costly and requires the setting of display data for each title unit, which is complicated. The latter is the titler of the video monitoring device (2a to 2 in FIG. 6).
Since the control of b) is a sequential process, the title signal switches with a delay of 1 to 2 fields with respect to the video signal, so that a plurality of output videos cannot be switched simultaneously.
If monitoring is performed in such a state, individual screens are separately switched, which may cause eyestrain of the monitor.

[0003]

In general, video signals are switched by controlling a matrix pitch during a vertical blanking period of the video signals to perform a switching operation so that the switching does not cause any disturbance in the video. Since one matrix switch controls all inputs and outputs, it is possible to switch a plurality of outputs at the same time, and the switching timing can be set arbitrarily. On the other hand, the display data for the on-screen controller for inserting the title is transmitted from the control unit through a common serial line, and the on-screen controller cannot simultaneously receive the individual display data simultaneously.

[0004]

In order to solve these problems, the present invention integrates the matrix switch 2 shown in FIG. 1 and the number of on-screen controllers 3 equal to or less than the number of output video signals, and A controller 3 is arranged on the output side of the matrix switch 2 together with a buffer memory 4 to temporarily store display data serially transmitted from a control unit in the buffer memory 4 and simultaneously switch the video signal. By transferring the data to each of the on-screen controllers 3, it is possible to provide means for simultaneously switching all video signals and title signals such as characters and the like.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a video surveillance apparatus having a matrix switch for arbitrarily selecting and switching a plurality of input video signals and transmitting a plurality of output video signals and superimposing a title signal on the output video signal, Matrix switch for arbitrarily selecting and switching the video input of the device, transmitting a plurality of video outputs, an on-screen controller for adding signals such as characters and figures, and a buffer for temporarily storing display data before the on-screen controller A memory, an input unit for inputting an arbitrary switching operation mode of the matrix switch and a display content of an on-screen controller, a control unit for controlling the matrix switch, the on-screen controller, and the like; and a control content of the control unit. A control memory unit, wherein the on-sulfur controller Arranged on the output side of the output video signal same number or fewer and then and the Matrigel try Sui Tutsi, placing the cross fur memory during said on-screen controller and the control unit.

[0006] This makes it possible to arbitrarily and simultaneously switch the video input signal and transmit a video signal output in which a title signal such as a character and a graphic is superimposed on the plurality of output signals.

【Example】

FIG. 2 is a block diagram of a main part of a video monitoring apparatus for selecting and switching four output video signals from eight input video signals in one embodiment according to the present invention. 1a to 1h (partially omitted) represent eight types of input video signal sources such as a television camera,
Denotes a matrix switch for arbitrarily switching and transmitting four types of output video signals from the eight input video signals.

3a to 3d (partially omitted) are camera numbers,
An on-screen controller for superimposing a title signal such as an installation location, an operation mode, a layout drawing of an installation location, a character such as an alarm, and a graphic on a video signal. The buffer memories 5a to 5d receive and temporarily store characters received from the control unit, and display font units for storing fonts such as characters and figures to be superimposed by the on-screen controller.

Reference numerals 6a to 6d denote a monitor for displaying an output video signal and a recording device for recording the output video, 7 denotes a matrix switch, an on-screen controller and a control unit for controlling various operations of the device, and 9 denotes a control unit. 3 shows a control memory unit for storing control data required.

Reference numeral 8 denotes an input unit for inputting data necessary for controlling the arbitrary and automatic switching modes of the matrix switch, the display mode of the on-screen controller, the display font, and the like.

In the input unit, reference numeral 10 denotes an operation unit for performing manual operation such as a key switch and operation buttons, 11 denotes a remote input unit for receiving input of remote control such as wired, wireless and optical transmission, and 12 denotes a camera. An alarm input unit 13 for receiving an abnormality and an alarm signal from an installation place or another alarm detection point or the like, and 13 is an automatic switching pattern of the matrix switch, a title signal data of the on-screen controller, and data such as the display font. 3 shows a removable card unit stored in advance.

FIG. 3 shows one of the matrix switches.
FIG. 3 is a conceptual diagram of four inputs and three outputs, and switches are respectively arranged at intersections of input lines and output lines, and each switch is controlled by a control signal from the control unit. In FIG. 2, a synchronizing signal is separated from an input video signal, and a control timing of an on-screen controller to be described later is extracted.

The operation will be described below. The input video signals from the eight cameras whose vertical synchronizing signals 1a to 1h are in phase with each other, as shown in FIG.
In the matrix switch, any four types of output signals are selected. Further, a synchronization signal is separated from an input video signal, and control timings of the matrix switch and an on-screen controller to be described later are extracted, but the description is omitted.

The four types of output signals from the matrix switch include a camera number, an installation location, date and time, various marks,
Four on-screen controllers 3 that superimpose title signals such as status information, layout drawing characters and graphics, etc.
Enter a to 3d. The on-screen controller,
Based on the display data from the buffer memory, the display font is called from the display font section, a title signal is generated, and four kinds of output video signals are transmitted by superimposing the title signal on the input video signal. The output video signal is connected to monitors 6a to 6d, and the image of the camera on which the title signal is superimposed is displayed.

The buffer memory 4a temporarily stores the serial display data signal from the common data line 14 shown in FIG. The display control signal is switched from the display control line 15 to the switching command (O
When N) is issued, the temporarily stored data is transferred to the on-screen controller 3a. The switching command (ON) includes four types of display data signals (a display to
It is transmitted during the vertical blanking period after the completion of transmission of (d display). Further, since the switching timing of the matrix switch is synchronized with the display control signal switching timing, the title signals of the four types of output signals do not generate a time difference from the video signal.

An input unit 8 inputs control data such as an automatic control mode of the matrix switch and manual arbitrary control, display data of the on-screen controller and display font. The operation unit 10 performs manual operation input, and the remote input unit 11 performs the functions of the operation unit by remote control such as wired transmission, wireless transmission, and optical transmission, and inputs display data and display font of an on-screen controller. Department. The alarm input unit is an input unit for inputting an alarm signal such as an abnormal signal from a camera installation location and an alarm signal from an external alarm device. The input receives an instruction to display an alarm or switch to a specific input.
The card unit 13 stores control data such as the switching mode of the matrix switch, the display data and display font of the on-screen controller, and the operation control mode of the entire apparatus, and controls the data according to a command from the control unit. To send to.

The control unit 7 controls the matrix switch, the on-screen controller, and other necessary devices. The control memory unit 9 includes a device memory unit 14 for storing a control sequence of a device such as a matrix switch control, a device input / output control, and a display control such as an on-screen display, an on-screen display data, and a matrix switch switching mode data. A data memory unit 15 for storing various data input from the input unit and data such as status data indicating the operation state of the apparatus, and a sequence relating to input / output with the entire apparatus and external devices, and storage of data. Responsible for regeneration.

[0018]

The present invention is embodied in the form described above and has the following effects.

The matrix switch for arbitrarily selecting and switching a plurality of video outputs from a plurality of video inputs, and outputting a number of the on-screen controllers equal to or less than the number of output video signals to the output of the matrix switch. By arranging together with the buffer memory having a storage function, even if an arbitrary input video signal is selected and output at the same time, a plurality of video output signals in a state where there is no time difference between the video signal from the camera and the superimposed title signal. Obtainable. As a result, the on-screen controller needs to be installed in a smaller number than the number of input video signals, so that the economic effect is improved and at the same time, the display data can be set from the input unit only with the present apparatus, thereby improving operability. Is done.

[0020]

[Brief description of the drawings]

FIG. 1 is a basic block diagram of a video monitoring device according to the present invention.

FIG. 2 is a block diagram of a main part of one embodiment of a video monitoring device according to the present invention.

FIG. 3 is a partial conceptual view of a matrix switch according to the present invention.

FIG. 4 is a timing diagram showing a display data signal, an on-screen controller switching timing signal, and a matrix switch switching timing signal in parallel according to the present invention.

FIG. 5 is a block diagram of a main part of a conventional video monitoring system.

FIG. 6 is a block diagram of a main part of a conventional video monitoring device with a built-in titler.

[Explanation of symbols]

 Reference Signs List 1 camera 1a camera 1 1h camera 8 2 matrix switch 3 on-screen controller 3a on-screen controller 3d on-screen controller 4 buffer memory 4a buffer memory 4d buffer memory 5a display font section 5d display font section 6 monitor 6a monitor 1 6d monitor 4 7 Input unit 9 Control memory unit 10 Operation unit 11 Remote input unit 12 Alarm input unit 13 Card unit 14 Device memory unit 15 Data memory unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04N 5/278 H04N 5/278 5/445 5/445 Z

Claims (6)

[Claims] 1. A video surveillance apparatus comprising: a matrix switch having a function of selecting and switching a plurality of video signals from a plurality of input video signals; and an on-screen controller for superimposing a title signal such as a character and a graphic on the selected video signal. A matrix switch having a function of selecting and switching an arbitrary plurality of output signals from a plurality of input video signals, and an on-screen controller for superimposing a title signal such as a character and a figure on an output signal from the matrix switch. A buffer memory for temporarily storing display data for the title signal and transferring the data to the on-screen controller when a video signal switching command is issued, a switching mode for the matrix switch, a display content of the on-screen controller, Enter the control mode of the device An input unit, a control unit that controls the matrix switch, the on-screen controller, the input unit and other devices in general, and a control memory that stores control data, display data, display mode, device control data, and the like. A plurality of on-screen controllers are arranged on the output side of the matrix switch together with the buffer memory, and the display data from the control unit is stored in the buffer memory, and then the matrix switch is stored. A video surveillance device, wherein the selection and switching of the on-screen controller and the display switching of the on-screen controller are performed simultaneously. 2. The video monitoring apparatus according to claim 1, wherein said input unit is a remote input unit for inputting a signal from a remote control. 3. An image monitoring apparatus according to claim 1, wherein said input section is an alarm input section for inputting a signal from an alarm device, a sensor or the like. 4. The input unit has a detachable card unit in which a switching mode of the matrix switch, a display mode of the on-screen controller, an operation mode of other devices and the like are stored in advance. 2. The video monitoring device according to 1. 5. The video surveillance device according to claim 1, wherein the display font section is a rewritable memory, and the display font can be replaced by data input from the input section. 6. The data memory section is a rewritable memory, which can store input data from the input section, status data such as operation status of the apparatus, and operation history data. Item 3. The video monitoring device according to Item 1.