JP2001128147A - Multi-point video signal selective transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To selectively transmit a video signal from a single monitor camera without compressing video input signals from many monitor cameras by a smaller number of transmission lines. SOLUTION: A selective transmission means is provided which transmits the video input signal from a terminal unit in one place, which is selected from individual video input signals from terminal units which are provided individual places in a department having many monitor places and have monitor cameras arranged, through a common transmission line without compressing nor overlapping, and plural insular units constituted by connecting many terminal units by one transmission line are arranged, and video input signals from individual terminal units are selectively transmitted to a central control means as a single video input signal through one insular unit and the common transmission line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a surveillance camera for each pachinko machine such as a pachinko playground, and transmits video input signals from these many surveillance cameras to a monitor of a central control unit in a central control room. The present invention relates to a multipoint video signal selective transmission system.

[0002]

2. Description of the Related Art When transmitting video input signals of a large number of surveillance cameras such as a conventional pachinko playground to a monitor of a central control and control room, each pachinko machine has its own electric wire, and these many electric wires are used. If a large number of video input signals are transmitted through a common transmission line to reduce the number of these wires, or if a large number of video lines are laid, the individual video input signals are modulated and demodulated in the central control unit. And a method of reproducing the data separately.
Furthermore, LAN (Local Area Network)
A method of digitally transmitting a video signal from a surveillance camera of a terminal using k) or the like is adopted, and it is also possible to selectively transmit a large number of video input signals with this digital transmission method.

[0003]

However, a method of laying such a large number of wires together in a central control room is as follows.
Not only does the weight increase, but the wiring is difficult and complicated,
The cost was also great. Further, when a plurality of video signals are individually modulated and transmitted using a common transmission line, a device for modulating and demodulating and reproducing is complicated and costly. In addition, it is necessary to convert the video input signal into a digital signal in real time and transmit it, and the final central control means must convert the video signal into an analog signal in real time and display it on a monitor. This digital and analog signal conversion method is complicated and expensive. Cost was required.

SUMMARY OF THE INVENTION The present invention provides various monitoring systems using video cameras or the like at low cost without using complicated circuits and devices in order to improve the above-mentioned problems in many complicated cases. The present invention provides a multi-point video input signal selective transmission system that can be used. The object of the present invention is to
An object of the present invention is to provide a multi-point video input signal selective transmission system which enables selective transmission of video input signals from a large number of surveillance cameras by using a small number of transmission lines, thereby greatly simplifying wiring and greatly reducing costs.

[0005]

Means for Solving the Problems The object of the present invention is to provide:
Compression double feeding of video input signals from one terminal unit selected from individual video input signals from terminal units provided with surveillance cameras provided at individual locations in a department having a large number of monitoring locations Instead, it can be achieved by a multi-point video signal transmission selection method including a selection transmission means for transmitting via a common transmission path. In addition, a plurality of island units are connected by connecting a large number of terminal units with one transmission line, and a video input signal from each terminal unit is selectively transmitted to a single video input signal via one island unit. And a multipoint video signal transmission selection method of transmitting the signal to the central control means via a common transmission path.

According to the multipoint video signal transmission selection method of the present invention, a surveillance camera is installed for each game console in a place where many game consoles are installed in a narrow space, such as various entertainment facilities. In this case, the video input signals from all the surveillance cameras can be selected and transmitted to the monitor of the central control unit in the central control room through a common transmission line. Because of such a small number of transmission lines, the number of wirings is greatly simplified, and a monitoring system can be installed at low cost. In particular, an island provided with a large number of terminal units can be connected to the island unit by one transmission line.

[0007] The present invention particularly provides a video transmission circuit with an open / close switch for each amusement console having each terminal unit, and an open / close switch for each island unit having a large number of terminal units. The video input signal from the terminal unit can be selectively transmitted to the central control room with the image of the desired game console.

[0008] The multi-point video signal transmission selection system of the present invention can be used, for example, in a monitoring system for each pachinko machine in a pachinko game hall. All switches controlled by the gate of the terminal unit that controls the surveillance camera arranged on each pachinko machine are turned off. When an abnormality occurs in any of the pachinko machines, a central control device that holds the abnormality information in the terminal unit of the pachinko machine in which the abnormality has occurred, and monitors the state of all the terminal units while scanning at predetermined time intervals. Detects the abnormal information of this terminal unit, turns on the switch of the terminal unit that caused the abnormality by the command issued by the central control unit, and the image near the pachinko machine is transmitted to the video input signal of the surveillance camera, the island unit Is recorded on the monitor or the video memory of the central control unit via

At this time, even when an abnormal signal is generated from a plurality of terminal units, the video input signal is transmitted to a monitor or a video memory by sequentially switching according to the order in which the abnormal information held in each terminal unit is detected. That is, there is no need to process the video input signal.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A multipoint video input signal selective transmission system according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic explanatory diagram of a surveillance camera system showing an embodiment of a multipoint video input signal selective transmission system according to the present invention. FIG.
FIG. 3 is a time-series explanatory diagram showing a relationship between a control command on a transmission path and a video input signal.

In FIG. 1, a video camera 1 as a surveillance camera and a terminal unit 2 are arranged on each game console.
The terminal unit 2 is provided with a terminal gate controller 4 which is controlled via a terminal switch 3 as switching means for selectively transmitting a video input signal from the video camera 1. An island unit 5 is provided in which a number of amusement tables are integrated by one common transmission line, and the island unit 5 is an island switch 6.
And an island gate controller 7. A plurality of these island units 5 are arranged, and all these island units 5
The transmission line 13 is connected to the central control unit 8 of the central control room.

The central control unit 8 is provided with a control unit 12, a video memory 10, a monitor 9 for displaying a video of a video input signal transmitted from each video camera 1 via a transmission line 13, and the like. A switch 11 for switching between transmitting the transmitted video input signal directly to the monitor 9 and transmitting the video input signal from the video memory 10 to the monitor 9 is provided.

The relationship between the control command and the video input signal shown in FIG. 2 will be described. Specified terminal unit 2
, The control unit 12 of the central control unit 8 sends the control command I including the designation of the island unit 5 and the terminal unit 2 of the connected transmission line 13 and the transmission time Td. Output. Among the group of island units 5 receiving the control command I, the island gate controller 7 of the island unit 5 corresponding to the island unit designation included in the control command I sends the control command I to the terminal unit 2 group hanging on the island unit 5. And the island switch 6 is turned ON for a predetermined time T1 to Td.

The terminal unit 2 receiving the control command I
In the group, the terminal gate controller 4 of the terminal unit 2 corresponding to the terminal unit designation included in the control instruction I turns on the terminal switch 3 for a predetermined time T1 to Td, and sets the video input signal to the transmission line 13. Is output. By the above operation, the control unit 12 can display the video input signal on the monitor 9 for a specified time from the terminal unit 2 specified via the terminal switch 3 and the island switch 6 or record the video input signal on the video memory 10. it can.

When checking the status of each terminal unit 2,
The control unit 12 outputs a control command II including designation of the island unit 5 and the terminal unit 2 used for confirmation to the transmission line 13. Among the group of island units 5 receiving the control instruction II, the island gate controller 7 of the island unit 5 corresponding to the island unit designation included in the control instruction II sends the control instruction II to the terminal unit 2 group hanging on the island unit 5. And the island switch 6 is turned ON for a predetermined time T3 after the predetermined time T2. The terminal gate controller 4 of the terminal unit 2 that matches the terminal unit designation included in the control instruction II among the terminal units 2 that have received the control instruction II receives the status signal (STAT) for a predetermined time T2 to T3. ) Is output to the transmission line 13. Similarly, when checking the state of each island unit 5, the control unit 1
2 is a control command I including the designation of the island unit 5 on the transmission line 13.
Output II.

The island unit 5 receiving the control instruction III
In the group, the island gate controller 7 of the island unit 5 corresponding to the island unit designation included in the control instruction III is set to the predetermined time T
After 4 hours, a status signal (STAT) is output to the transmission line 13 for a predetermined time T5. By the above operation, the control unit 12 can receive the status of each of the island units 5 and the terminal unit 2, and can perform an appropriate process according to status information such as occurrence of fraud and abnormality of each unit.

Each terminal switch 3 and each island switch 6 used in the present invention may be a mechanical electromagnetic switch or an electronic video switch. Further, the gate controllers arranged in the terminal unit 2 and the island unit 5 can be realized by a simple logic circuit.

The video input signal and the control commands (I, II, III) used in the present invention enter the terminal gate controller 4 and the island gate controller 7, respectively. It can be easily determined by changing the polarity and signal level, and the control commands (I, II, II
Incorporation of information into I) and the status signal can be easily realized by a serial pulse signal or the like.

Further, the distance that the signal travels along the transmission line from the video camera installed at each amusement platform to the central control room via the island unit 5 becomes longer and signal attenuation becomes a problem. The propagation distance can be adjusted by dividing the terminal unit group into a plurality of island units as described above.

[0020]

According to the multipoint video input signal selective transmission system of the present invention, a gate controller in which video signals from video cameras for a plurality of terminal units are arranged in each terminal unit,
By controlling the gate controller and the switch in the switch and island unit 5, individual video signals can be selectively transmitted to a common transmission line, and only necessary video can be transmitted to the central control room. It is possible to monitor the whole with less wiring and inexpensive equipment.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory diagram of a surveillance camera system showing one embodiment of a multipoint video input signal selective transmission system of the present invention.

FIG. 2 is a time-series explanatory diagram showing a relationship between a control command on a transmission line and a video input signal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Video camera 2 ... Terminal unit 3 ... Terminal switch 4 ... Terminal gate controller 5 ... Island unit 6 ... Island switch 7 ... Island gate controller 8 ... Central control unit 9 ... Monitor 10 ... Video memory 11 ... Switch 12 ... control unit 13 ... transmission line

Claims (3)

[Claims] 1. A video input signal from one terminal unit selected from individual video input signals from terminal units provided with surveillance cameras provided at individual locations in a department having a large number of monitoring locations. A multi-point video signal selective transmission system characterized by comprising selective transmission means for transmitting via a common transmission path without performing compression multiple transmission. 2. A plurality of island units each comprising a plurality of terminal units connected by one transmission line, and a video input signal from each terminal unit is selectively transmitted to a single island unit via one island unit. 2. The multipoint video signal selective transmission system according to claim 1, wherein the video input signal is transmitted to a central control unit via a common transmission path. 3. A surveillance system having a large number of islands having a plurality of surveillance locations arranged at an end thereof and having a centralized management unit for managing the large number of islands, an imaging means for imaging a video and converting it into a video signal. A terminal unit comprising: a switching unit that is opened and closed by a gate controller that selectively transmits a video signal from the imaging unit; a monitoring location where the imaging unit and the terminal unit are arranged; A large number of terminal units are connected, connected to one transmission line for transmitting a video input signal from a terminal unit selected from these terminal units, a switch connected to the transmission line, and a gate control for controlling the switch An island unit equipped with a switch, a monitor including a switch by a gate controller for selectively transmitting video input signals from a plurality of island units, and displaying a transmitted image; Monitoring system, characterized in that it comprises a central control unit provided with an image memory for recording the fed video, multi-point video signal selection transmission method consisting.