JP2000197227A - Surveillance camera system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To grasp progress status for safety control by receiving the selection signal of an upstream side cable by means of a relay for transmission to a downstream side cable, and receiving the picture signal of a cable for a head part and the picture signal of the downstream side cable to transmit them to the upstream side cable based on the selection signal. SOLUTION: This surveillance camera system 10 involves a relay 23 connected to head part 12 of a steel tower 11. A controller 13 and the relay 23 are connected to each other by a cable. The relay 23 receives a control signal and a sound signal from the controller 13 or the upstream side relay 23 to send them to the head part 12 or the downstream side relay 23, and receives a picture signal and the sound signal from the head part 12 or the downstream side relay 23 to send them to the controller 13 or the upstream side relay 23. To identify the head part 12, the relay 23 has an ID number switch and allocates an ID number to the head part. It is thus possible to select and monitor the steel tower 11 by means of one controller 13 to receive sound information, thereby giving sound instruction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance camera system for monitoring work such as overhead wire work between towers and transport of luggage along a cableway installed between the towers.

[0002]

2. Description of the Related Art In the work of connecting wires between steel towers and the work of transporting luggage on a cableway installed between steel towers, it is difficult to grasp the progress of the entire work and to manage safety only by hand. It is difficult because the work range is wide and the work is performed at a high place. It is conceivable to install surveillance cameras for centralized management.However, communication cables must be laid to the monitor room for each surveillance camera.Laying a large number of cable bundles is not realistic from the work environment. Absent. The present invention uses a single controller and a relay connected to each surveillance camera, so that work can be performed in a wide area and in a place where it is not easily accessible without routing a communication cable bundle. The purpose is to clarify the surveillance camera system that can grasp the status and manage the safety.

[0003]

A surveillance camera system according to the present invention comprises a plurality of head units (12) having a surveillance camera (14).
And a controller (13) for selecting any one of the plurality of head units (12) and receiving a video signal from the surveillance camera (14) of the head unit (12), and the controller (13) A surveillance camera system (10) comprising a monitor (20) for receiving and displaying a video signal from a head unit cable (25) for each head unit (12). And a plurality of repeaters (23) connected through a cable (2).
4), a controller (13) is connected to a repeater (23) at one end via a cable (24), and the controller (13) includes a plurality of head units ( 12), a selection signal indicating the selected head unit (12) is generated and transmitted to the cable (24), and a video signal is received from the cable (24) and the monitor (20) The repeater (23) receives the selection signal from the upstream cable (24a), transmits the signal to the downstream cable (24b), and the head cable (25).
And a video signal from the downstream cable (24b), and one of the video signals can be transmitted to the upstream cable (24a) based on the selection signal.

[0004]

According to the present invention, one controller (13) can select and monitor one of a plurality of towers (11), receive voice information, and give voice instructions. Further, according to the present invention, the above operation can be realized by connecting the controller and the repeater (23) in series via one cable (24), so that the controller (13) and each repeater (23) There is no need to lay multiple cables connecting between them.

[0005]

Embodiments of the present invention will be described below.

(First Embodiment) FIG. 1 shows an overall configuration of a surveillance camera system according to a first embodiment of the present invention. The surveillance camera system (10) is installed in each tower (11),
A head unit (12) for monitoring 1) and a controller (13) for controlling all head units (12) are provided. As shown in FIG. 4, the head unit (12) includes a monitoring camera (14) for monitoring the tower (11) and its surroundings, and a microphone (15) for collecting audio information.
And a speaker (16) for transmitting voice instructions.

FIG. 7 shows the head section (12). In the embodiment, the surveillance camera (14) and the speaker (16) are formed separately. The casing (100) of the surveillance camera (14) has a hemispherical dome (11
0), and a transparent window (120) is provided in a part of the dome portion (110) in a vertical plane in a vertical plane of about 75 ° from right to left and right and left in a range of 150 ° in total. Instead of providing the transparent window (120), the dome part (110) itself can be made transparent. As is well known in surveillance cameras, the dome portion (110) includes a CCD circuit board (130) and a transparent window (12).
0), a tilt motor (not shown) for moving in the Y1 or Y2 direction, a pan motor (not shown) for moving the dome portion (110) in the X1 or X2 direction, a CCD circuit board (130) A zoom motor (not shown), a motor for auto focus (not shown), and a microphone (not shown) for providing a zoom function by moving a lens provided in front of the lens in the Z1 or Z2 direction back and forth. Surveillance camera (14) and speaker
Each of (16) is attached to a desired position and a desired direction of a steel tower by a flexible support shaft (140) and a magnet base (150) at the tip of the shaft.

In the above embodiment, the speaker (16) is separated from the surveillance camera (14) and the microphone (15) in order to transmit voice information with high output and a wide range, but the surveillance camera (14) and the microphone (15) are separated. And the speaker (16) can also be provided in one casing.

As shown in FIG. 1, a controller (13) includes a monitor (20) for displaying an image from a surveillance camera (14) of a tower (11) to be monitored, and a surrounding area of the tower (11). A microphone (21) for transmitting a voice instruction to a person at a location and a speaker (22) for listening to voice information from around the tower (11) are connected. When only a specific person listens to the audio information, the speaker
Headphones can be used instead of (22).

[0010] The surveillance camera system (10)
A relay (23) is provided near the (11) and connected to the head (12) of the tower (11). All the repeaters (23) are connected in series, and the controller (13) is connected to the repeater (23) at one end. Controller (13) and all repeaters (23) are one cable
Connected at (24). Now, in each repeater (23), the side to which the controller (13) is connected is the upstream side, and the opposite side is the downstream side. As described later, each repeater (23) includes a controller (13).
Or, a control signal and an audio signal are received from the upstream repeater (23), and the head unit (12) or the downstream repeater (23) is received.
, And receives the video signal and the audio signal from the head unit (12) or the downstream repeater (23), and transmits them to the controller (13) or the upstream repeater (23). Each head (1
To identify 2), each repeater (23) is provided with an ID number switch (50) (see FIG. 3) described later, and the ID number switch (50) is used to assign an ID number to each head. Is assigned.

FIG. 2 shows the internal configuration of the controller (13). The controller (13) includes a selection button (30) for selecting which head unit (12) to control, and a surveillance camera control button (31) for controlling the surveillance camera (14) of the selected head unit (12). ). The selection signal from the selection button (30) and the control signal from the surveillance camera control button (31) are encoded in the encoder (32), and are coded via the switching circuit (90).
F (interface) circuit (33) or I / F for repeater
The signal is transmitted to the circuit (34). Each of the I / F circuits (33) and (34) converts the coded selection signal or control signal into a signal according to a predetermined external transmission standard (for example, RS422). The head I / F circuit (33) transmits the converted signal to the head (12) directly connected to the controller (13), and outputs the I / F circuit (3) for the repeater.
4) transmits the converted signal to the repeater (23).

The encoder (32) is provided with a selection button (30)
A switching signal indicating whether or not the head unit (12) directly connected to the controller (13) is selected based on the signal from the controller (13), and the switching signal is generated by a switching circuit (90) and a switching circuit described later. (37) (42)
Send to (47). Head directly connected to controller (13)
Each switching circuit (90) (3) is connected to the head (12) when (12) is selected, and to the repeater (23) otherwise.
7) (42) and (47) are switched respectively.

The controller (13) is connected to the microphone amplifier (35) for amplifying the audio signal from the microphone (21), and controls the amplification level of the microphone amplifier (35). Equipped with a microphone volume (36). The audio signal amplified by the microphone amplifier (35) is transmitted to the head section differential output amplifier (38) or the repeater differential output amplifier (39) via the switching circuit (37). Differential output amplifier (38) (39)
Is a voltage signal between the signal line and the ground, and the differential output amplifiers (38) and (39) convert the voice signal into a voltage signal between two terminals. Differential output amplifier for head (38)
Indicates the converted audio signal (audio A signal)
(12), and the repeater differential output amplifier (39) transmits the audio A signal to the repeater (23). At this time, the voltage signal is appropriately amplified in consideration of the fact that the signal after transmission is attenuated.

The audio signals (audio B signals) from the head section (12) and the repeater (23) are respectively a differential input amplifier for the head section (40) and a differential input amplifier for the repeater (41). To receive. The audio signal received by the differential input amplifiers (40) (41) is a voltage signal between two terminals. Differential input amplifier (40)
(41) converts the audio signal into a voltage signal between the signal line and the ground, and transmits the voltage signal to the switching circuit (42). At this time, the voltage signal is appropriately amplified in consideration of the fact that the received signal is attenuated. The switching circuit (42), based on the switching signal from the encoder (32), the audio signal from one of the head unit differential input amplifier (40) and the repeater differential input amplifier (41) speaker amplifier ( Send to 43). Speaker amplifier (4
3) amplifies the audio signal and outputs it to the speaker (22). A speaker volume (44) is connected to the speaker amplifier (43) to control the amplification level of the speaker amplifier (43).

The video signal from the head unit (12) is received by the head bus amplifier (45), and the video signal from the repeater (23) is received by the repeater bus amplifier (46). Each of the bus amplifiers (45) and (46) appropriately amplifies a voltage signal as a video signal and transmits the voltage signal to the switching circuit (47), taking into consideration that the received video signal is attenuated. A cable compensator (49) that raises a trigger signal such as a synchronization signal included in a video signal to a certain signal level is provided by a bus amplifier (46) for a repeater.
And a switching circuit (47). The switching circuit (47) transmits a video signal from either the head bus amplifier (45) or the repeater bus amplifier (46) to the output amplifier (48) based on the switching signal from the encoder (32). I do. The output amplifier (48) amplifies the video signal and monitors it (2
Output to 0).

FIG. 3 shows the internal configuration of the repeater (23). The I / F circuit, the switching circuit, the differential output amplifier, the differential input amplifier, the bus amplifier, the output amplifier, and the cable compensator described above with respect to the controller (13) are the same as the repeater (23).
Since the function also functions in the same manner, the description thereof is omitted.

The repeater (23) includes an ID number switch (50) for specifying a head connected to the repeater (23). I
The D number switch (50) is preselected by the user,
The selected ID number is transmitted to the decoder (51). Controller (1
The selection signal or control signal from 3) or the upstream repeater (23) is received by the receiving I / F circuit (52). I / F for reception
The circuit (52) converts the received signal into the original coded selection signal or control signal, and transmits it to the switching circuit (53) and the decoder (51). The decoder (51) is a receiving I / F.
It operates only when a selection signal is received from the circuit (52), and based on the selection signal and the ID number from the ID number switch (50), the head (12) selected by the controller (13) and the repeater ( It is checked whether the head unit (12) directly connected to (23) matches.
The decoder (51) is connected to the head unit (12) when they match, and to the downstream repeater (23) when they do not match.
Transmits a switching signal to each of the switching circuits (53), (57), (62), and (66).

The switching circuit (53) sends a selection signal or a signal to either the head I / F circuit (54) or the repeater I / F circuit (55) based on the switching signal from the decoder (51). Send a control signal. The I / F circuits (54) and (55) convert the received selection signal or control signal into a signal in accordance with a predetermined external transmission standard, and the head I / F circuit (54) sends the signal to the repeater (23). The signal is transmitted to the directly connected head unit (12), and the I / F circuit (5
5) is transmitted to the downstream repeater (23).

An audio signal (audio A signal) from the controller (13) or the upstream repeater (23) is supplied to a differential input amplifier (56).
In, the audio signal is converted into a predetermined audio signal, appropriately amplified, and transmitted to the switching circuit (57). The switching circuit (57) transmits the received audio signal to either the head section differential output amplifier (58) or the repeater differential output amplifier (59) based on the switching signal from the decoder (51). I do. Differential output amplifier (5
8) (59) converts to a predetermined audio signal (audio A signal), amplifies it appropriately, and outputs a differential output amplifier for head (58)
Is transmitted to the head section (12) directly connected to the repeater (23), and the differential output amplifier for the repeater (59) is connected to the downstream repeater (23).
To be transmitted.

The head (12) or the downstream repeater (23)
The audio signal (audio B signal) is converted into a predetermined audio signal in the differential input amplifier for head (60) and the differential input amplifier for repeater (61), and is appropriately amplified. Then, it is transmitted to the switching circuit (62). Switching circuit (62)
Based on the switching signal from the decoder (51), the differential input amplifier for the head (60) or the differential input amplifier for the repeater (6
The audio signal from any of 1) is transmitted to the differential output amplifier (63). The differential output amplifier (63) converts the signal into a predetermined audio signal (audio B signal), amplifies the signal appropriately, and transmits the signal to the controller (13) or the upstream repeater (23).

The video signal from the head section (12) or the downstream repeater (23) is appropriately amplified in the head section bus amplifier (64) and the repeater bus amplifier (65), respectively. The signal is transmitted to the switching circuit (66). Note that, as described above,
Preferably, the cable compensator (67) is provided between the repeater bus amplifier (65) and the switching circuit (66). Switching circuit (6
6) transmits the video signal from either the head bus amplifier (64) or the repeater bus amplifier (65) to the output amplifier (68) based on the switching signal from the decoder (51). The output amplifier (68) amplifies the video signal and transmits it to the controller (13) or the upstream repeater (23). As shown in FIG. 3, a monitor terminal (69) is provided in the repeater (23),
(69) can be connected to the repeater bus amplifier (64). In this case, by disposing a monitor (not shown) connected to the monitor terminal (69) near the repeater (23), a signal from the head (12) directly connected to the repeater (23) can be obtained. A surveillance camera image can be displayed on a monitor.

FIG. 4 shows the internal structure of the head section (12). The I / F circuit, the switching circuit, the differential output amplifier, the differential input amplifier, the bus amplifier, the output amplifier, and the cable compensator described above with respect to the controller (13) and the repeater (23) are provided in the head unit (12). ) Also functions in the same manner, and a description thereof will be omitted.

The selection signal or control signal from the repeater (23) is converted into the original selection signal or control signal in the reception I / F circuit (70) and transmitted to the decoder (71). decoder
(71) decodes a control signal from the selection signal or the control signal, and based on the control signal, a motor driver (72) (73) (74) connected to each motor for pan, tilt, zoom and focus. ) Select the motor driver connected to the motor to be driven from (75) and transmit the instruction signal. The motor driver receiving the instruction signal from the decoder (71) drives the connected motor by a predetermined amount or for a predetermined time.

The audio signal (audio A) from the repeater (23)
Signal) is converted into a predetermined audio signal in a differential input amplifier (76), and is appropriately amplified, and is then amplified by a speaker amplifier (77).
Sent to. The speaker amplifier (77) amplifies the audio signal and transmits it to the speaker (16), and the speaker (16) outputs the audio. Further, the audio signal from the microphone (15) is amplified by a microphone amplifier (78), converted into a predetermined audio signal (audio B signal) by a differential output amplifier (79), appropriately amplified, and relayed. Transmitted to the vessel (23). Also,
The video signal from the surveillance camera (14) is transmitted directly to the repeater (23).

Although not shown in FIGS. 2 and 3, the controller (13), each of the repeaters (23) and the head (12) are provided with a power supply for supplying necessary power. Head part
In the case of (12), power may be supplied from the repeater (23).

In the surveillance camera system (10) configured as described above, when the selection button (30) of the controller (13) is pressed and the desired head section (12) on the tower (11) is selected, the selection is made. A selection signal is transmitted from the button (30) to the encoder (32). At this time, when the head unit (12) directly connected to the controller (13) is selected by the switching signal from the encoder (32), each switching circuit (90) (37) (42) (47) Switches to the head (12) side. When the head (12) directly connected to the repeater (23) is selected, each switching circuit (90) (37)
(42) (47) switches to the repeater (23), and the select button (30)
From the encoder (32) and the relay I / O
The signal is transmitted to the repeater (23) via the F circuit (34).

In the repeater (23), a selection signal from the controller (13) or the upstream repeater (23) is transmitted to a receiving I / F circuit (52).
Via the decoder (51) and the switching circuit (53). The decoder (51) refers to the received selection signal and the ID number from the ID number switch (50), and selects the head unit (12) directly connected to the repeater (23). Then, the switching circuits (53), (57), (62) and (66) are switched to the head (12) side. When the head unit (12) directly connected to another repeater (23) is selected, each switching circuit (53) (57) (62) (66) switches to the downstream repeater side, The selection signal from the switching circuit (53) is transmitted to the downstream repeater (23) via the repeater I / F circuit (55). By repeating the same operation in the downstream repeater (23), the controller (13)
It leads to (12).

Thus, the video signal from the surveillance camera (14) in the desired head unit (12) is transmitted to the monitor (20) connected to the controller (13), and the video can be displayed. The audio signal from the microphone (15) in (12) is
The sound is transmitted to the speaker (22) connected to (3) and can be output. Also, an audio signal from a microphone (21) connected to the controller (13) is transmitted to the head unit (12),
A sound can be output from the speaker (16) of (12), and a control signal is transmitted from the controller (13) to a desired head unit (12) by pressing a monitoring camera control button of the controller (13), The monitoring camera operation such as a pan operation, a tilt operation, a zoom operation, and a focus operation in the monitoring camera (14) of the head unit (12) can be controlled.

Therefore, according to the present invention, one controller (13)
In, one of the plurality of towers (11) can be selected and monitored, audio information can be received, and audio instructions can be given. Further, according to the present invention, the controller and the repeater (23)
Since the above operation can be realized by serially connecting the cables (24), it is not necessary to lay a large number of cables connecting the controller (13) and each of the repeaters (23).

(Embodiment 2) The surveillance camera system of the second embodiment is configured such that when an object conveyed on a cableway laid between towers (11) approaches a certain tower, a controller controls the tower. The video is switched to the video of the surveillance camera and displayed on the monitor. 5 and 6 show a controller according to a second embodiment.
(80) and the internal configuration of the repeater (81). The surveillance camera system according to the second embodiment is different from the first embodiment in that a sensor (82) for detecting approach of a conveyed object is provided in each tower, and a controller (80) and a repeater (81) Are partially different, and the others are the same. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 6 is a block diagram showing the internal configuration of the repeater (81) of the second embodiment. The detection signal from the sensor (82) connected to the repeater (81) is received by the encoder (83). Upon receiving the detection signal, the encoder (83) refers to the ID number from the ID number switch (50) and transmits an ID number signal indicating the ID number to the transmission I / F circuit (84). In addition, I from the repeater (81) connected to the downstream side
The D number signal is converted to a predetermined signal format by the reception I / F circuit (85) and then transmitted to the transmission I / F circuit (84). The transmission I / F circuit (84) receives the ID number signal from the encoder (83) or the reception I / F circuit (85), converts the ID number signal into a predetermined signal format, and sends the signal to the controller (80) or the upstream. To the repeater (81) on the side.

FIG. 5 is a block diagram showing the internal configuration of the controller (80) of the second embodiment. The sensor signal from the sensor (82) connected to the controller (80) is transmitted to the encoder (89). The ID number signal from the repeater (81) is converted into a predetermined signal format by the reception I / F circuit (86), decoded by the decoder (87), and then sent to the encoder (89). Sent. The encoder (89) specifies the tower (11) in which the sensor (82) that has issued the detection signal is provided, based on the received sensor signal or ID number. Next, the identified tower (11)
The encoder (89) transmits the switching signal to the switching circuits (90), (37), (4) so that the head (12) and the controller (80) arranged in the
2) While transmitting the selection signal to (47), the selection signal is transmitted to the switching circuit (90). Further, the encoder (89) causes the display (88) to display the specified number of the steel tower (11) and the like. In this case, the numbers and the like may be superimposed on the video on the monitor (20).

In the surveillance camera system of the second embodiment configured as described above, a sensor (82) of a certain tower is
When detecting the conveyed object, a detection signal from the sensor (82) is transmitted to the encoder (83) of the repeater (81) to which the sensor (82) is connected, and an ID number signal from the encoder (83) is transmitted. Is transmitted to the encoder (89) of the controller (80) via the I / F circuits (84) (85) (86) and the decoder (87). The encoder (89) specifies the tower (11) in which the sensor (82) that has issued the detection signal is provided from the received ID number signal, and displays the number of the specified tower (11) on the display (88). Display,
The switching signal and the selection signal are transmitted to connect the controller (80) with the head (12) provided in the tower (11). as a result,
An image of the conveyed object can be displayed on a monitor of the controller (13).

The description of the above embodiment is for the purpose of illustrating the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof.
Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an overall configuration of a surveillance camera system according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a controller according to the first embodiment.

FIG. 3 is a block diagram illustrating a configuration of a repeater according to the first embodiment.

FIG. 4 is a block diagram illustrating a configuration of a head unit according to the first embodiment.

FIG. 5 is a block diagram illustrating a configuration of a controller according to a second embodiment.

FIG. 6 is a block diagram illustrating a configuration of a repeater according to a second embodiment.

FIG. 7 is a perspective view of a head unit.

[Explanation of symbols]

 (10) Surveillance camera system (12) Head (13) (80) Controller (20) Monitor (23) (81) Repeater

Claims (5)

[Claims] 1. A plurality of heads (12) each including a monitoring camera (14), and one of the plurality of heads (12) is selected, and a monitoring camera (14) of the head (12) is selected. A surveillance camera system (10) comprising: a controller (13) for receiving a video signal from the controller (13); and a monitor (20) for receiving and displaying the video signal from the controller (13). The system (10) includes a repeater (23) connected to each head section (12) via a head section cable (25), and all the repeaters (23) are connected via a cable (24). A controller (13) is connected to the repeater (23) at one end via a cable (24), and the controller (13) is connected to the repeater (23) at one end. Select one of them, generate a selection signal indicating the selected head unit (12), transmit it to the cable (24), receive the video signal from the cable (24), output it to the monitor (20), and relay it Vessel (23) Receiving a selection signal from the upstream side cable (24a), and conveyed to the downstream cable (24b), the video signal and the downstream cable from the head portion cable (25) (2
A surveillance camera system that receives the video signal from 4b) and transmits one of the video signals to the upstream cable (24a) based on the selection signal. 2. A head unit (12) includes a motor for operating a surveillance camera (14) such as panning, tilting, zooming, and focusing of a surveillance camera (14), and a controller (13) includes a selected head unit (12). A control signal for controlling the operation of the surveillance camera of 12) is transmitted to the cable (24), and the repeater (23) receives the control signal from the upstream cable (24a), and based on the selection signal, the downstream cable. (24b)
And a control signal transmitted to one of the head part cable (25), the head part (12) receives the control signal from the head part cable (25), and performs monitoring camera driving means based on the control signal. The surveillance camera system according to claim 1, which controls driving of the surveillance camera. 3. An audio input means (21) connected to a controller (13).
And an audio output means (22). The audio input means (21) converts an external sound into an electric signal (first audio signal), transmits the electric signal to the controller (13), and outputs the sound to the controller (13). Receives an electrical signal (second audio signal) from the controller, converts the signal into audio, and outputs the audio. The head unit (12) includes an audio input unit (15) and an audio output unit (1).
6), the audio input means (15) converts external sound into a second audio signal and transmits it to the head cable (25), and the audio output means (22) The controller (13) receives the first audio signal from the microphone (21) and transmits the first audio signal from the microphone (21) to the cable (24). With the cable (24) from the second
The audio signal is received and output to the speaker (22). The repeater (23) receives the first audio signal from the upstream cable (24a), and based on the selection signal, the downstream cable (24b).
And transmitting the first audio signal to one of the head cable (25) and receiving the second audio signal from the head cable (25) and the second audio signal from the downstream cable (24b). 3. The surveillance camera system according to claim 1, wherein one of the video signals is transmitted to the upstream cable (24a) based on the selection signal. The controller (13) has a head cable (2).
The controller (13) is connected to one of the cable (24) and the cable (25) for the head unit based on the selection signal. The surveillance camera system according to claim 1, wherein the surveillance camera system transmits and receives the information. 5. A sensor means (82) is connected to at least one repeater (81) via a cable, and all the repeaters (81) are connected to the repeater (81) or the repeater (81). ) Is received from the downstream cable (24b) and transmitted to the upstream cable (24a), and the sensor means (82) is connected via the cable. Repeater (8
When the sensor signal is received from the sensor means (82), the repeater (81) or the head (1) connected to the repeater (81)
2) Generate an ID number signal that specifies
(24a), the controller (80) receives the ID number signal from the cable (24), generates a selection signal based on the ID number, and transmits the selection signal to the cable (24). The surveillance camera system according to any one of claims 1 to 4.