JP3554107B2 - Video input device and video input device setting method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a video input device capable of attaching and detaching a plurality of camera units.And video input device setting methodIt belongs to the technical field.
[0002]
[Prior art]
FIG. 11 is a block diagram showing the configuration of a conventional example of a video input device.
[0003]
Camera part 100 and video processingDepartment200 is connected by a cable 109.MovieImage processingDepartment200 is connected to the host terminal 400 by a bus i / f 208. From the host terminal 400 via the bus i / f 208MovieImage processingDepartment200 and camera unitMinute100 is controlled.
[0004]
140 is a single focus 200,000 pixel CCD camera, and 150 is a zoom focus, 400,000 pixel CCD camera.
[0005]
First, the configuration of the single focus camera unit 140 will be described.
[0006]
Reference numeral 106 denotes a system control unit, which comprises a one-chip microcomputer having functions such as a CPU, a ROM, a RAM, a control port, and a communication port. The system control unit 106 is a camera unitMinuteControl each of the 100 devices,MovieImage processingDepartment200 and two-way communication. Reference numeral 101 denotes a lens unit including an imaging lens, a focus lens, and a focus ring for manually moving the focus lens. An iris unit 102 adjusts the amount of incident light passing through the lens unit 101, and includes an iris and an iris ring for manually moving the iris. An image sensor 103 such as a CCD for photoelectrically converting an image passed through the lens unit 101 and the iris 102 and converting the image into an electric signal has an image element of 200,000 pixels. Reference numeral 105 denotes an image sensor driving circuit such as a TG that controls an accumulation operation, a read operation, and a reset operation according to the number of pixels of the image sensor 103. The shutter speed can be changed by controlling the system control unit 106 via the control signal 110.
[0007]
Reference numeral 108 denotes a synchronization signal generation circuit such as an SSG, which generates a video synchronization signal 112 such as a horizontal synchronization signal (HD), a vertical synchronization signal (VD), and a video clock from a clock of the TG (105). Reference numeral 104 denotes an S / H AGC circuit that performs sampling and holding in order to reduce noise due to accumulation of electricity in the image sensor 103 and adjusts a gain of a video signal, and outputs a video signal 114. The gain of the imaging signal 114 is adjusted by controlling the system control unit 106 via the control signal 111. 113 is a camera unitMinuteA data line and a data control line for performing bidirectional data communication between the image processing unit 100 and the video processing unit 200, and are connected to a serial communication port of the system control unit 106. A connector 107 is detachable from the cable 109.
[0008]
Next, the configuration of the camera unit 150 will be described. The differences from the camera unit 140 are a zoom lens 121, an iris 122, and an image sensor 123. The other parts are the same as those of the camera unit 140, and thus description thereof is omitted.
[0009]
The zoom lens 121 is a lens unit including an imaging lens, a focus lens, a zoom motor for moving a focus ring, a zoom lens, and a zoom motor for moving a zoom ring. Under the control of the system control unit 106 via the control line 124, electric zoom and autofocus can be performed.
[0010]
An iris unit 122 adjusts the amount of incident light passing through the lens unit 101, and includes an iris motor for moving the iris and the iris ring. The opening and closing of the iris is controlled by controlling the system control unit 106 via the control line 125. The system control unit 106 can perform automatic exposure by controlling the iris, shutter speed, and AGC gain to keep the brightness data of the subject transmitted from the video processing unit 200 constant. Reference numeral 123 denotes an image sensor such as a CCD that photoelectrically converts an image passed through the lens unit 121 and the iris unit 122 and converts the image into an electric signal, and has an image sensor of 400,000 pixels.
[0011]
MovieThe image processing unit 200 will be described.
[0012]
Reference numeral 250 denotes a system control unit, which comprises a one-chip microcomputer having functions such as a CPU, a ROM, a RAM, a control port, and a communication port. The system control unit 250MovieThe control of each device of the image processing unit 200, automatic white balance control, communication with the camera units 140 and 150, and communication with the host terminal 400 via the bus i / f 208 are performed. It also interprets commands from the host terminal and performs operations requested by the host.
[0013]
Reference numeral 201 denotes an AD conversion circuit that converts an image signal 217 transmitted from a camera unit via a cable into a digital signal 218. Reference numeral 202 denotes a signal processing circuit that performs a process of converting the digitally converted imaging signal 218 into a standardized digital video signal 219. The signal processing circuit 202 is an interrupt for notifying the brightness data of the subject used for exposure control, the white balance data for white balance control, and the focus / focus data for focus control in the cycle of the vertical synchronization signal. A signal is generated and transmitted to the system control unit 250. The system control unit 250 that recognizes the interrupt reads out the information via the serial data line 223 and writes the information to the RAM area of the system control unit 250.
[0014]
Reference numeral 204 denotes an encoder circuit for converting the standardized digital video signal 219 into a multiplexed composite signal 221, and outputs the composite signal 221 to a video output connector 210. An image memory 206 stores digital video signals from the signal processing circuit 202 and the SRC 207. Reference numeral 205 denotes a memory controller circuit that controls reading and writing of the image memory 206. 207 isMovieA scan rate converter circuit (SRC) that converts and absorbs a difference in aspect ratio between the digital video signal 213 of the image processing unit 200 and the digital video signal 214 of the host terminal.
[0015]
Reference numeral 203 denotes a switching circuit for selecting whether the output 225 to the encoder 204 is the digital video signal 219 of the signal processing circuit 202 or the digital video signal 216 of the image memory 206. The switching circuit 203 is controlled by the system control unit 250 through the control line 224. .
[0016]
Reference numeral 208 denotes a bus i / f circuit connected to the bus of the computer that is the host terminal 400.MovieAn i / f for controlling the memory controller 205 and the SRC 207 from the host terminal 400 while providing data communication of the digital video signal 214 and the control data 226 with the image processing unit 200 is provided.
[0017]
215 is a camera unitMinuteCorresponding to 100 video synchronization signals 112MovieA video synchronization signal of the image processing unit 200, which provides the video synchronization signal to the signal processing circuit 202, the memory controller 205, and the encoder 204.
[0018]
222 is a camera unitMinuteA serial data line and a serial data control line for performing bidirectional data communication between the image processing unit 100 and the video processing unit 200 are connected to a serial data port of the system control unit 250.
[0019]
226 is connected to the host terminal 400MovieThese are parallel data lines and control lines for performing bidirectional data communication with the image processing unit 200, and are connected to the control port of the system control line 250.
[0020]
By replacing the camera unit, the user can select a camera head according to the application. When replacing the camera head, parameters must be set in the signal processing circuit 202 according to the type of the camera head. For example, the number of pixels of the image sensor 103 of the single focus camera unit 140 is 200,000 pixels, and the number of pixels of the image sensor 123 of the zoom camera unit 150 is 400,000 pixels. In this case, the signal processing circuit 202 is connected to the camera unit 140 is connected in 200,000 pixel mode, and when camera unit 150 is connected, in 400,000 pixel mode.Set parameters in the signal processing circuit 202InitializeI do.
[0021]
[Problems to be solved by the invention]
When the user replaces the camera unit and shoots, the user has to attach and detach the camera unit to and from the video processing unit, which is troublesome.In order to save this trouble, a configuration is conceivable in which a plurality of camera units are kept connected to the video processing unit, and the camera unit for inputting image signals is switched and used as needed by the user. However, even in that case, parameters must be set in the signal processing circuit in accordance with the type of the switched camera unit, and the user's labor is required.
[0022]
The present invention has been made to solve the above-mentioned conventional problems,By simply selecting a port, the parameters corresponding to the camera unit of the selected port can be automatically set to the video processing means, greatly reducing the setting work due to changes in the camera part.Video input deviceAnd video input device setting methodThe purpose is to provide.
[0023]
[Means for Solving the Problems]
The present invention has a plurality of camera units.SaidA video processing unit that processes an input signal from the camera unit and outputs a video signal.Comprising, the plurality of camera units and the video processing unitIn a video input device connected by a signal cable,The image processing unit,A plurality of said camera unitsAnd through the signal cableMultiple ports to connect,Video processing means for processing an input signal from the camera unit input from the plurality of ports,Switching means for switching the plurality of ports;When a performance attribute acquisition request from an external device is received,SaidpluralConnected to a portPerformance stored in each cameraAttributeBy reading from each of the camera sections via the signal cableDetecting means for detecting;Along with the connection state of the plurality of ports, the performance attribute of each camera connected to the plurality of ports detected by the detection unit is displayed.Storage means for storing;When a port switching request is received from the external device, an output destination of the switching unit is switched to a port requested by the external device, and a camera corresponding to the requested port stored in the storage unit. Read the performance attributes of the unit and correspond to the read performance attributesVideo processingParametersSettingsFor the image processing meansControl means to performToThe above object is achieved by a video input device provided with the above.
Also, the present invention provides a method for connecting a plurality of camera units and a video processing unit with a signal cable, wherein the video processing unit is configured to connect the plurality of camera units and the plurality of ports via the signal cable, and the plurality of ports. And a video processing means for processing an input signal from the camera unit input from the video input device, when receiving a performance attribute acquisition request from an external device, connected to the plurality of ports The performance attributes stored in each of the cameras are detected by reading out from each of the camera units via the signal cable, and the connection status of the plurality of ports together with the connection state of the plurality of ports is detected. A storage step of storing the performance attribute of the camera in the storage means, and when a port switching request is received from the external device, the port is output to the port requested by the external device. Switch the destination, read the performance attribute of the camera unit corresponding to the requested port stored in the storage unit, and set the video processing parameter corresponding to the read performance attribute to the video processing unit. The above object is achieved by a method of setting a video input device, comprising a control step of performing the control.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present invention, the camera unit and the image processing unitConnect with signal cableIn the video input device, each of the plurality of camera units is connected to any one of a plurality of ports of the video processing unit, and switching means for switching the plurality of ports is provided. The attribute is stored in the storage means, and the video processing corresponding to the attribute of the camera selected by the port switching is controlled by the control means, and a video signal is output.
[0025]
【Example】
FIG. 1 is a block diagram showing a configuration of a video input device according to one embodiment of the present invention. Portions that are the same as or correspond to the blocks of the above-described conventional example shown in FIG. 11 are denoted by the same reference numerals, and redundant description is omitted. Differences from the conventional example and supplementary portions will be described below.
[0026]
Reference numeral 231 denotes a port 1 (233) connector, and 232 denotes a port 2 (234) connector.
[0027]
Reference numeral 230 denotes a camera changeover switch, which switches signals connected to the signal lines 215, 217, and 222 by a port (233) and a port 2 (234) under the control of the system control unit 250.
[0028]
FIG. 2 is a block diagram of the system control unit 250. The system control unit 250 includes a one-chip microcomputer and software for controlling the microcomputer.
[0029]
251 is an internal bus, 252 is a CPU, 253 is a ROM for storing software, 254 is a RAM used as a work area for software, and 255 is a rewritable ROM (EEPROM), which stores data necessary for control. . 256 is a timer unit, and 257 is an I / O control unit for controlling various devices.
[0030]
258 is each cameraDepartment,While performing command communication with the host terminal 400,MovieA serial communication port for performing serial communication with each device of the image processing unit 200 and controlling the devices.
[0031]
With the host terminal 400MovieFIG. 3 shows control commands communicated between the image processing unit 200 and one of the camera units 140 and 150.
[0032]
The request command is a command for requesting an operation. The response command is a response command to the request command, and is returned when the requested operation is completed. ACK is a frame for notifying the transmission side that the command has been normally received.
[0033]
(3-1) of FIG. 3 shows that the host terminal 400MovieA sequence when an operation is requested to the image processing unit 200 will be described. When the video processing unit 200 receives a request command from the host terminal 400,MovieThe image processing unit 200 executes the requested command, and transmits a response command to the host terminal when the execution is completed.
[0034]
(3-2) is a sequence when the host terminal 400 requests the camera unit to perform an operation.MovieThe image processing unit 200 is a hostTerminalThe command from 400 is a command addressed to the cameraLakoThe command is transferred to one of the camera units 140 and 150. If a command from one of the camera units 140 and 150 is addressed to the host terminal 400BacoThe command is transferred to the host terminal 400.
[0035]
(3-3)MovieIt is a sequence when the image processing unit requests the camera unit to perform an operation.
[0036]
FIG. 4 shows the format of the command.
[0037]
(4-1) shows the format of the command frame. L indicates how many bytes of data the frame is composed of. FID is a frame identifier, and is used to identify a frame attribute. CID is a command identifier and identifies the type of command. The parameters are determined according to the command.
[0038]
(4-2) is an ACK frame format. The length (L) is fixed at 2 bytes. The frame identifier (FID) is fixed at 80h. When the parameter portion is 00h, it indicates that the frame has been received normally, and when it is other than 00h, it indicates that an error has occurred. The cause of the error is identified by the value of the parameter.
[0039]
(4-3) is an explanatory diagram showing a bit configuration of a frame identifier (FID). bit7 is a bit for identifying whether the frame is a command frame or an ACK frame. Bits 2 and 3 are destination device designation bits for designating the destination of the command. Bits 0 and 1 are bits for designating a command issuing source by issuing source designation bits.
[0040]
(4-4) is an explanatory diagram showing a bit configuration of a command identifier (CID). Bit 7 is a valid bit in the case of a response command, and is set to 0 when the function specified by the request command ends normally, and is set to 1 when it cannot be ended normally. This bit distinguishes between negative and positive acknowledgments. Bit 6-bit 0 specifies the type of command with the command type bit.
[0041]
Figure 5 shows the hostTerminal400 and the video processing unit 200,For the host terminal 400 to acquire camera attribute parametersFIG. 4 is an explanatory diagram showing a format of an initialization command.
[0042]
(5-1) is the hostTerminalSent from 400 to video processing unit 200For the host terminal 400 to acquire camera attribute parametersThis is a format of an initialization request command.
[0043]
(5-2) is a host from the video processing unit 200TerminalSent to 400For the host terminal 400 to acquire camera attribute parametersThis is a format of an initialization response command.
[0044]
(5-3)For the host terminal 400 to acquire camera attribute parametersThe contents of the camera attribute parameters of the parameters 1 and 2 of the initialization response command are shown. Camera attributes and parameter values have the correspondence shown in the table. In this embodiment, four types of cameras can be connected.
[0045]
FIG. 6 shows a video processing unit 200 and a camera unit.MinuteFIG. 4 is an explanatory diagram showing a format of a camera attribute command communicated between the cameras.
[0046]
(6-1) is a camera unit from the video processing unit 200Minute100 is a format of a camera attribute request command transmitted to the camera 100;
[0047]
(6-2) is the camera sectionMinuteThis is a format of a camera attribute response command transmitted from the image processing unit 100 to the video processing unit 200. Turtle of parameter 1La genusSex is the turtle of (5-3) described above.LA attributeParameter.
[0048]
Figure 7 shows the hostTerminalFIG. 4 is an explanatory diagram showing a format of a port switching command communicated between the image processing unit 400 and a video processing unit 200.
[0049]
(7-1) is the hostTerminalThis is a format of a port switching request command transmitted from the image processing unit 400 to the video processing unit 200.
[0050]
(7-2) is a host from the video processing unit 200Terminal4 is a format of a port switching response command (acknowledgement) transmitted to the H.400.
[0051]
(7-3) is a host from the video processing unit 200TerminalThis is a format of a port switching response command (negative response) transmitted to the H.400.
[0052]
FIG.For the host terminal 400 to acquire camera attribute parametersFIG. 6 is an explanatory diagram showing a command sequence for initialization.
[0053]
In this sequence, a single-focus 200,000-pixel CCD camera 140 is connected to the port 1 (233), and a 400,000-pixel CCD camera 150 for zooming is connected to the port 2 (234).
[0054]
hostTerminalFrom 400MovieTo the image processing unit 200For the host terminal 400 to acquire camera attribute parametersAn initialization request command is transmitted.MovieThe image processing unit 200 switches the camera changeover switch 230 to port 1 (233) and transmits a camera attribute request command. Upon receiving the camera attribute request command, the single-focus 200,000 pixel camera unit 140 transmits a camera attribute response.MovieThe image is transmitted to the image processing unit 200.MovieThe image processing unit 200 switches the camera changeover switch 230 to the port 2 (234), and transmits a camera attribute request command. Upon receiving the camera attribute request command, the zoomed 400,000 pixel camera unit 150 transmits a camera attribute response.MovieThe image is transmitted to the image processing unit 200. Then, the image processing unit 200 hosts the camera attribute responses of the two cameras.Terminal400.
[0055]
FIG. 9 shows that the video processing unit 200TerminalFrom 400To get camera attribute parameters9 is a flowchart illustrating an operation of the system control unit 250 when receiving an initialization request command.
[0056]
In step S1, the camera changeover switch 230 is switched to port 1 (233). In S2, it is checked whether there is a video synchronization signal on the signal line 215. If there is no video synchronization signal, since no camera is connected to port 1 (233), it is stored that no camera is connected to port 1 (233), and the process proceeds to S4.
[0057]
If there is a video synchronization signal in S2, it is known that the camera unit is connected, and the process proceeds to S3.
[0058]
And in S3, the camera unit 14Turtle at 0La genusThen, a camera request parameter is transmitted, the camera attribute parameter of the camera attribute response command returned from the camera unit 140 is read, and the camera attribute parameter is stored as the camera of the port 1 (233).
[0059]
In S4, the camera changeover switch 230 is switched to the port 2 (234). In S5, it is checked whether there is a video synchronization signal on the signal line 215. If there is no video synchronization signal, since no camera is connected to port 2 (234), it is stored that no camera is connected to port 2 (234), and the process proceeds to S7.
[0060]
If there is a video synchronization signal in S5, it is known that the camera unit is connected, so the process proceeds to S6.
[0061]
In S6, the camera unit 15Turtle at 0La genusTransmits the sex request command and returns the cameraLa genusThe camera attribute parameter of the gender response command is read and stored as the camera of port 2 (234). In S7, the camera attribute parameters of port 1 (233) and port 2 (234) are added., To get camera attribute parametersHosts initialization response commandTerminal400.
[0062]
FIG. 10 shows that the video processing unit 200 is a hostTerminal5 is a flowchart illustrating an operation of the system control unit 250 when a port switching request command is received from the control unit 400.
[0063]
In step S21, the port number of parameter 1 of the port switching request command is analyzed. If the port number parameter is "1" in S22, the process proceeds to S23, and if "2", the process proceeds to S29. Then, the camera attribute of the port 1 (233) or the port 2 (234) is checked, and the process proceeds to S24 or S30.
[0064]
In S24The host terminal 400 acquires a camera attribute parameterThe camera attribute of port 1 stored at the time of initialization is checked. If not connected in S24, proceed to S28 and hostTerminalA port switch response (negative) is transmitted to 400.
[0065]
If the camera is connected to the port 1 in S24, the process proceeds to S25, and the camera switch 230 is switched to the port 1 in S25. In S26, the signal processing circuit 202 is operated according to the camera attribute (200,000 CCD or 400,000 CCD mode).Set parameters in the signal processing circuit 202InitializeI do. And host in S27TerminalA port switch response (positive) is transmitted to 400.
[0066]
In S29,The host terminal 400 acquires a camera attribute parameterThe camera attribute of the port 2 (234) stored at the time of initialization is checked. If the camera is connected to the port 2 in S30, the process proceeds to S31, and if not, the process proceeds to S33 and the hostTerminalA port switch response (negative) is transmitted to 400. In S31, the switch 230 is switched to the port 2 (234). In S32, the signal processing circuit 202 is operated according to the camera attribute (200,000 CCD or 400,000 CCD mode).Set parameters in the signal processing circuit 202InitializeDo. And host in S27TerminalA port switch (positive) is transmitted to 400.
[0067]
(Other embodiments)
In another embodiment of the present invention, the system control unit 250 of the video processing unit 200 shown in FIG. , The signal processing circuit 202 is set.
[0068]
Host the above functionsTerminal400. That is,The host terminal 400 acquires a camera attribute parameterHost at initializationTerminalAt step 400, the camera attributes for each port are stored.2(200,000 pixels or 400,000 pixels) may be specified.
[0069]
【The invention's effect】
As described above, according to the present invention,The information on the connection state and the performance attribute of the camera can be updated at a desired timing even from a remote external device, and the parameter corresponding to the camera unit of the selected port can be transmitted to the video processing means only by selecting the port. Setting can be performed automatically, so that the setting work caused by the change of the camera unit can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of an embodiment.
FIG. 2 is a block diagram illustrating a configuration of a system control unit included in a video processing unit according to one embodiment.
FIG. 3 is an explanatory diagram of a sequence of a control command according to the embodiment;
FIG. 4 is an explanatory diagram illustrating a configuration of a command frame according to an embodiment;
FIG. 5 shows an embodiment.The host terminal 400 acquires a camera attribute parameterFIG. 4 is an explanatory diagram illustrating a configuration of an initialization command.
FIG. 6 is an explanatory diagram showing a configuration of a camera attribute command according to one embodiment.
FIG. 7 is an explanatory diagram showing a configuration of a port switching command according to one embodiment.
FIG. 8 shows an embodiment.The host terminal 400 acquires a camera attribute parameterFIG. 6 is an explanatory diagram showing a command sequence for initialization.
FIG. 9 shows an embodiment.The host terminal 400 acquires a camera attribute parameter9 is a flowchart illustrating the operation of the system control unit of the video processing unit that has received the initialization request command.
FIG. 10 is a flowchart illustrating an operation of the system control unit of the video processing unit that has received the port switching request command according to the embodiment;
FIG. 11 is a block diagram showing a configuration of a conventional video input device.
[Explanation of symbols]
100 camera part
101 lens unit (single focus)
102 Iris section (manual)
103 Image sensor (200,000 pixels)
104 S / H AGC circuit
105 Image sensor drive circuit
106 System control unit
107 Connector
109 cable
110 Image sensor drive circuit control line
111 S / H AGC control line
112 Video sync signal
113 data line
114 Image signal
121 lens unit (electric zoom)
122 Iris section (electric)
123 image sensor (400,000 pixels)
140 camera unit (200,000 pixels, single focus lens)
150 Camera unit (400,000 pixels, zoom lens)
200 Video processing unit
201 AD converter
202 signal processing circuit
203 switch
204 encoder circuit
205 Memory Controller
206 memory
207 Scan Rate Converter
208 BUSi / f
210 Video output terminal
211 Connector
212 Memory control signal
213 Digital video signal
214 digital video signal
215 Video synchronization signal
216 Digital video signal
217 Image signal (analog)
218 Image signal (digital)
219 Digital video signal
221 Composite output signal
222 data line
223 signal processing circuit signal
224 changeover switch control signal
225 Digital video signal
226 data line
230 Camera switch
231 connector (port 1)
232 connector (port 2)
233 Camera port 1
234 Camera Port 2
250 System control unit
400 host terminal

Claims (6)

And a video processing unit for outputting the processed video signal the input signal from the camera unit and the plurality of camera unit, the image input apparatus connected by the plurality of camera unit and the video processing unit and a signal cable,
The image processing unit,
A plurality of ports connected to the plurality of camera units via the signal cable ;
Video processing means for processing an input signal from the camera unit input from the plurality of ports,
Switching means for switching the plurality of ports;
When a performance attribute acquisition request is received from an external device, the detection is performed by reading out the performance attributes stored in each camera connected to the plurality of ports from each of the camera units via the signal cable. Means,
Storage means for storing , with the connection state of the plurality of ports, performance attributes of each camera connected to the plurality of ports detected by the detection means ,
When a port switching request is received from the external device, an output destination of the switching unit is switched to a port requested by the external device, and a camera corresponding to the requested port stored in the storage unit. A video input device comprising: a control unit that reads a performance attribute of a unit and sets a video processing parameter corresponding to the read performance attribute to the video processing unit. 2. The video input device according to claim 1, further comprising a transmission unit configured to transmit a performance attribute of each camera connected to the plurality of ports stored in the storage unit to the external device. The video input device according to claim 1, wherein the performance attribute includes at least one of a lens type of a camera and a number of pixels of an image sensor. A plurality of camera units and a video processing unit are connected by a signal cable, and the video processing unit is connected to the plurality of camera units and the plurality of ports via the signal cable, and the plurality of ports are input from the plurality of ports. A video processing device for processing an input signal from the camera unit, comprising:
When a performance attribute acquisition request is received from an external device, the performance attributes stored in each camera connected to the plurality of ports are detected by reading out from each camera unit via the signal cable, A storage step of storing, in a storage unit, the detected performance attributes of the cameras connected to the plurality of ports, together with the connection states of the plurality of ports,
When a port switching request is received from the external device, the output destination is switched to the port requested by the external device, and the performance attribute of the camera unit corresponding to the requested port is stored in the storage unit. Controlling the video processing means to read and set video processing parameters corresponding to the read performance attributes to the video processing means. 5. The method according to claim 4, further comprising transmitting a performance attribute of each camera connected to the plurality of ports stored in the storage unit to the external device. . The method according to claim 4, wherein the performance attribute includes at least one of a camera lens type and an image sensor pixel number.

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