JP2018029322A - Control system for high definition camera based on coaxial cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control system for a high definition camera based on a coaxial cable, capable of minimizing signal loss.SOLUTION: A control system includes: an amplifier module 200 connected to a high definition camera 300 and amplifying an image signal; and a signal processing module 100 connected to the amplifier module via a coaxial cable based on PoC (Power Over Coaxial) to provide power to the camera and the amplifier module via the coaxial cable and receiving a power signal coupled to an image signal of the camera from the amplifier module via the coaxial cable. Equalizing information on an amplification factor of each frequency band, which is most suitable while corresponding to a transmission distance of the coaxial cable, is automatically selected to allow the image signal to be automatically amplified according to an equalizing pattern in accordance with the selected equalizing information and be transmitted.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a control system for a high quality camera based on a coaxial cable. More specifically, the present invention relates to a control system for a high-quality camera based on a coaxial cable that can minimize signal loss that occurs in the process of transmitting an analog video signal generated via a high-quality camera based on the coaxial cable. .

  Currently, the demand for CCTV (Closed Circuit TeleVision) systems using cameras for monitoring for various purposes such as security and fire prevention is rapidly increasing, and the development of CCTV cameras for increasing the monitoring efficiency is remarkable. .

  In the existing CCTV system, the digital system is not universalized, and an analog SD (Standard Definition) class camera using a coaxial cable is mainly used. Most of SD cameras using such a coaxial cable are mostly used. The resolution is extremely inferior to that of a digital camera, and there is a problem that the monitoring efficiency is greatly lowered due to a signal loss that occurs during transmission of a video signal via a coaxial cable.

  In order to solve this problem, recent CCTV systems have been continuously replaced with high-quality cameras that support digital HD (High Definition) -class video. In order to apply the above, the replacement of the video processing-related device and the line must be additionally performed, so that the cost burden is considerable, and there is a problem that the replacement of the existing CCTV system is difficult.

  However, recently, with the development of camera manufacturing technology, HD-SDI (High Definition Serial Digital Interface), TVI (Transport Video Interface), AHD (Analogue High Deaf), which can provide high-quality video using coaxial cables. A camera of such a standard has been provided, and a CCTV system that provides high-quality HD-class video using a pre-constructed coaxial cable can be constructed.

  In addition, along with the advent of PoC (Power Over Coaxial) that supplies power via a coaxial cable that connects the video processing apparatus that receives the video of the camera and the camera, the camera is connected via the coaxial cable. A power supply can be provided to greatly improve the complexity of the system.

  However, in the case of the HD-SDI standard, since a digital signal is transmitted to a video processing device via a coaxial cable, a certain image quality can be guaranteed through the compensation processing configuration of the video processing device. In the case of a standard for transmitting an analog signal via a coaxial cable, such as TVI or AHD, signal loss such as signal attenuation or distortion occurs in the process of transmitting a video signal via the coaxial cable, and the longer the transmission distance, There is a considerable signal loss, and there is a problem that image quality degradation or distortion occurs in the video received by the video processing device.

  For this reason, it is necessary to configure an amplifier for amplifying the video signal of the camera in the camera for stable signal transmission of an analog high-quality camera. Such an amplifier has a fixed amplification factor. However, there is a problem in that signal loss still occurs as the camera is located at a long distance due to the transmission distance due to the disposition position of the different cameras.

  Accordingly, there is a demand for system development for minimizing the loss of video signals transmitted from analog high-quality cameras based on such coaxial cables.

Korean Registered Patent No. 10-0334256

  In the present invention, in order to prevent the loss of the video signal such as the loss or distortion of the video signal generated in the process of transmitting the video signal of the high quality camera as an analog signal using the coaxial cable, the amplification factor of the video signal is set. In addition to providing a high-quality video by minimizing the loss of the video signal by varying the transmission distance using the coaxial cable, the video quality of the cameras located at different distances is made uniform. Its purpose is to help.

  In addition, the present invention variably adjusts the degree of amplification of the video signal by changing the transmission distance of the coaxial cable that transmits the video signal to prevent image quality deterioration or distortion in the camera image, and Its purpose is to increase convenience in change.

  A control system for a high-quality camera based on a coaxial cable according to an embodiment of the present invention is connected to a camera that generates a high-quality video signal, which is an analog signal, and an amplification unit configured to amplify the video signal. Further, the amplification degree of the amplifying unit can be varied according to the band according to the equalization information on the selected code book and the code book set so that the equalization information in the frequency band amplification degree of the video signal is different for each control code. An amplification module including an equalizing unit and a different amplification module and a PoC-based coaxial cable connected to each channel, and measuring power consumption of the amplification module, the camera, and the coaxial cable via the coaxial cable, Based on the set power consumption compared to the transmission distance, the same as above. The transmission distance in the cable is calculated, the control signal in the control code set in advance corresponding to the transmission distance is transmitted to the amplification module via the coaxial cable, and the equalizing selected by the control signal A signal processing module for amplifying the video signal of the camera with an equalizing pattern based on information may be included.

  As an example related to the present invention, an amplification module combines a video signal amplified via an amplification unit with a power signal and transmits the signal to a signal processing module via a coaxial cable. The video signal may be separated from the received power signal and transmitted to an external device connected to the signal processing module.

  As an example related to the present invention, when the signal processing module receives an amplified video signal through the amplification module, the signal processing module corresponds to the control code transmitted to the amplification module and is based on the restoration information set in advance. It can be characterized by restoring.

  As an example related to the present invention, the restoration information includes an equalizing pattern for restoring the video signal amplified through the amplification module, and the signal processing module converts the video signal amplified by the equalizing pattern based on the restoration information. It can be characterized in that it is equalized and transmitted to an external device.

  As an example related to the present invention, in the signal processing module, information on the power used by each different camera and each different amplification module corresponding to each channel is stored in advance, and amplification via a coaxial cable is performed on any one channel. When connecting modules, measure the power consumption corresponding to the channel, and calculate the remaining power by subtracting the power consumption of each camera and amplifier module connected to the channel from the measured power consumption, and calculate the power consumption of the coaxial cable. After that, the transmission distance of the coaxial cable can be calculated by comparing this with a power consumption for comparison with the transmission distance set in advance.

  As an example related to the present invention, the signal processing module determines whether or not to connect the amplification module in each channel, and generates and transmits a control signal in the amplification module when connecting the amplification module in any one channel. Can be characterized.

  As an example related to the present invention, the signal processing module combines the control signal with the power signal and transmits it to the amplification module via the coaxial cable, and the amplification module separates the control signal from the power signal and uses the control signal. It is possible to select equalizing information on a code book corresponding to the selected control code.

  The present invention provides a predetermined transmission distance range in order to minimize loss of the video signal due to attenuation or distortion of the video signal generated in the process in which the video signal of the high-quality camera is transmitted through the coaxial cable. Among the equalizing information, the video signal is automatically amplified by the equalizing pattern according to the selected equalizing information by automatically selecting the equalizing information at the most suitable amplification factor for each frequency band corresponding to the transmission distance of the coaxial cable. In order to minimize the loss of the video signal and to provide a high-quality video, the video signal transmission of the high-quality camera corresponding to each different channel The most suitable equalizing information for each coaxial cable with different transmission distance is used to amplify the video signal. Able to dynamic application, there is an effect that it is possible to provide a video quality equivalent for all channels.

  Further, the present invention provides a signal processing module that provides a video signal of a high-quality camera to a video processing device, and changes the transmission distance of the coaxial cable by changing the arrangement of the camera corresponding to any one channel. A change in transmission distance due to a change in power consumption can be automatically detected, and an amplification module that amplifies the video signal of the camera with the changed arrangement can be automatically changed with an equalizing pattern corresponding to the changed transmission distance. The video signal can be amplified and transmitted with the equalizing pattern changed by the automatic operation so that the loss of the video signal due to the change of the transmission distance is minimized even when the arrangement of the camera is changed. This has the effect of providing convenience in the arrangement of the camera.

1 is a configuration diagram of a control system for a high-quality camera based on a coaxial cable according to an embodiment of the present invention. FIG. FIG. 3 is an operation configuration diagram of a signal processing module in a control system for a high-quality camera based on a coaxial cable according to an embodiment of the present invention. FIG. 3 is an operation configuration diagram of an amplification module in a control system for a high-quality camera based on a coaxial cable according to an embodiment of the present invention. FIG. 5 is an operation configuration diagram in video signal restoration of a signal processing module in a control system for a high-quality camera based on a coaxial cable according to an embodiment of the present invention.

  Hereinafter, detailed embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram of a control system for a high-quality camera based on a coaxial cable according to an embodiment of the present invention. As shown in the figure, an image signal is generated as an analog signal, and HD (High Definition) class or higher. Based on an amplification module (200) that amplifies the video signal, the amplification module (200), and a PoC (Power Over Coaxial) connected to a high-quality camera (hereinafter referred to as camera) (300) that provides high-quality video. Connected via a coaxial cable to provide power to the camera (300) and the amplification module (200) via the coaxial cable, and coupled to the video signal of the camera (300) from the amplification module (200). A signal processing module (100) for receiving a power signal via the coaxial cable. Door can be.

  At this time, the signal processing module (100) may be connected to a plurality of different cameras (300) with each connected amplification module (200) via the coaxial cable. A plurality of ports to be connected to each other, and different channels for each port can be preset.

  Through this, the signal processing module (100) receives the video signals of the different cameras (300) received through the respective channels, and converts the video signals of the respective channels to DVR (Digital Video Recorder). It can be transmitted to an image processing device (10) or an output device (20) such as a monitor.

  At this time, the PoC-based coaxial cable can be configured to transmit a video signal and a power signal through one cable, and a single coaxial cable is used to transmit the video signal and the power signal. Power can be provided together with transmission of a video signal composed of an analog signal, such as Interface or AHD (Analogue High Definition).

  However, in the process of transmitting the video signal through the coaxial cable, loss such as loss or distortion of the video signal occurs due to the interference of the power signal, thereby reducing the video quality.

  Also, the frequency band where distortion and loss occur in the video signal differs depending on the transmission distance depending on the length of the coaxial cable.To prevent this, the frequency band where loss occurs due to the transmission distance of the coaxial cable is considered. Based on this, an amplification in the video signal has to be made.

  Therefore, the present invention calculates the transmission distance of the coaxial cable when connecting the camera (300) and the video processing device (10) via the coaxial cable, and sets the optimal distance that is set in advance corresponding to the transmission distance. Providing high-quality video even when transmitting analog video signals using coaxial cables by amplifying video signals with an equalizing pattern to help minimize loss of video signals Help to be able to.

  Based on the above configuration, the detailed configuration of the amplification module (200) and the signal processing module (100) according to the embodiment of the present invention will be described with reference to the following drawings.

  First, the signal processing module (100) includes a signal processing unit (110), a distance measurement unit (120), a first control unit (130), a power providing unit (140), and a storage unit (150). Can be included.

  The detailed operation of each component of the signal processing module (100) will be described in detail with reference to FIG. 2. As illustrated, the signal processing module (100) includes a plurality of ports to which different coaxial cables are connected. And can be connected to a plurality of different amplification modules (200) and a plurality of cameras (300) via a coaxial cable connected to each port.

  At this time, the signal processing unit (110) of the signal processing module (100) is configured so that channels in each port are set in advance, and controls each port, and the amplification module (200) via the coaxial cable for each channel. A video signal coupled to the signal processing module (100) by receiving a power signal combined with the video signal from the power signal, separating the video signal from the power signal received through each channel; A video signal for each channel can be transmitted to the device (10) or the output device (20).

  Meanwhile, the power supply unit (140) provides the signal processing unit (110) with power for driving the camera (300) and the amplification module (200) connected to the ports via a coaxial cable. The signal processing unit (110) provides the camera (300) and the amplification module (200) corresponding to each port from the power supply unit (140) via the coaxial cable of each port. Power can be provided.

  In addition, the first control unit (130) can determine whether or not to connect to the amplification module (200) via a coaxial cable at each port in conjunction with the signal processing unit (110). Through this, the connection state with the amplification module (200) in the channel corresponding to each port can be sensed (determined).

  In addition, the first control unit (130) includes the power supply unit (140) and the signal processing unit when the amplification module (200) connected to the camera (300) is connected to any one of the ports. The unit (110) may be controlled to supply power to the camera (300) and the amplification module (200) via the coaxial cable corresponding to the camera (300) and the amplification module (200).

  At this time, when the amplification module (200) connected to the camera (300) in the signal processing unit (110) is connected to any one of the ports via a coaxial cable, the power supply unit (140) is connected. ) Can be provided to the amplification module (200) via a coaxial cable.

  In addition, the first control unit (130) may connect the amplification module (200), which is connected to the camera (300) to any one of the ports, through a coaxial cable. ), The amplification factor for each frequency band of the amplification module (200) corresponding to the new connection port is set to the transmission distance of the coaxial cable that transmits the video signal of the camera (300) connected to the amplification module (200). Thus, it is possible to calculate the transmission distance of the coaxial cable necessary for controlling with the optimum equalizing pattern for minimizing the loss of the video signal.

  For example, the first control unit 130 controls the signal processing unit 110 when the connection of the camera 300 and the amplification module 200 is detected to the new connection port via a coaxial cable. The signal processing unit (110) is consumed by the coaxial cable and the camera (300) and the amplification module (200) connected through the new connection port under the control of the first control unit (130). The power can be measured.

  The first control unit (130) controls the distance measuring unit (120) corresponding to the new connection port detected to be connected, and the distance measuring unit (120) is configured to control the first control unit. Under the control of (130), the power consumption measured by the signal processing unit (110) can be recognized in conjunction with the signal processing unit (110).

  On the other hand, the distance measuring unit (120) stores in advance spec (spec) information on power consumption (power consumption) of different cameras (300) corresponding to the respective ports and different amplification modules (200). Thus, the power consumption of each of the camera (300) and the amplification module (200) connected to the new connection port via a coaxial cable can be calculated from the power consumption measured corresponding to the new connection port. The remaining power after subtraction can be calculated by the power consumed by the coaxial cable connected to the new connection port.

  On the other hand, the distance measuring unit (120) may be set in advance with setting information regarding the amount of power consumption relative to the transmission distance of the coaxial cable, and the power consumption of the coaxial cable connected to the new connection port may be set as the setting information. Compared with, the transmission distance of the coaxial cable can be calculated.

  Through this, the distance measurement unit (120) is linked with the signal processing unit (110) to transmit the coaxial cable connected to the new connection port based on the power consumption of the coaxial cable corresponding to the new connection port. The distance can be calculated.

  Meanwhile, the distance measuring unit (120) can provide distance information in the channel corresponding to the new connection port to the first control unit (130), and the first control unit (130) The distance information can be stored in the storage unit (150) by matching with a channel corresponding to a new connection port.

  Through this, the signal processing module 100 can store the distance information according to the transmission distance of each coaxial cable for each channel corresponding to each different port in the storage unit 150.

  At this time, if there is existing distance information matched with the channel corresponding to the new connection port, the first controller 130 may update the existing distance information to the most recently generated distance information. If the coaxial cable connected to any one of the ports is disconnected in conjunction with the signal processing unit 110, the channel corresponding to the port that has been disconnected upon detecting the connection release. The distance information stored by matching can be deleted from the storage unit (150).

  Further, the first control unit (130) stores code information in which a control code for controlling the amplification factor for each frequency band of the amplification module (200) for each different distance range set in advance is set. The first controller (130) selects a control code corresponding to a distance range to which a distance according to distance information corresponding to any one channel belongs based on the code information, and the selection Channel information corresponding to the selected control code and control information including the selected control code can be provided to the signal processing unit (110).

  At this time, the first controller 130 may extract the control code for each channel, match the channel information, and store the code in the storage unit 150. Of course, a plurality of different distance values can be preset instead of the plurality of different distance ranges set in advance, and the first control unit (130) can determine the distance based on the distance information. The control code matched with the distance value that matches can be selected and extracted from the code information.

  Thereafter, the signal processing unit (110) generates a control signal including the control code based on the control information received from the first control unit (130), and then is provided from the power providing unit (140). Can be transmitted to the amplification module (200) via a coaxial cable connected to a port of a channel corresponding to the control signal.

  On the other hand, the amplification module (200) corresponds to the control code included in the control signal received from the signal processing module (100), and the camera (300) has an equalizing pattern based on preset equalizing information. By amplifying the video signal and providing it to the signal processing module (100), it is possible to operate so that the loss of the video signal due to the transmission distance of the coaxial cable is minimized. This will be described in detail based on

  First, as shown in FIGS. 1 and 3, the amplification module (200) includes an amplification unit (240), a power processing unit (210), an equalizing unit (230), and a second control unit (220). ).

  The detailed operation of each component constituting the amplification module (200) will be described with reference to FIG. 3. The power processing unit (210) is a power provided from the signal processing module (100) via the coaxial cable. Can be provided to the camera (300), and power can be provided to each component of the amplification module (200).

  The power processing unit (210) separates a control signal transmitted by the signal processing module (100) in combination with the power signal from a power signal received via the coaxial cable to perform the second control. Part (220).

  On the other hand, the second control unit 220 includes a codebook (codebook or codebook information) in which equalizing information on the amplification factor for each frequency band is set for a plurality of different control codes set in advance. The second control unit (220) selects a control code corresponding to the control signal from the code book based on the control signal provided from the power processing unit (210), and selects the selected control. Equalizing information on the code book corresponding to the code can be extracted (selected) and provided to the equalizing unit (230).

  In addition, the equalizing unit (230) may control the amplification factor for each frequency band of the amplifying unit (240) using an equalizing pattern based on equalizing information provided from the second control unit (220).

  Accordingly, the amplification unit (240) receives the video signal provided from the camera (300), amplifies the video signal with an amplification factor for each frequency band according to the equalizing pattern, and then the power processing unit (210). ) Can be provided.

  In addition, the power processing unit (210) can combine the video signal amplified through the amplification unit (240) with a power signal and transmit it to the signal processing unit (110) through the coaxial cable. .

  Through this, the signal processing module 100 receives the power signal combined with the video signal in the signal processing unit 110 of the signal processing module 100, as shown in FIG. The video signal is separated from the power signal, and the video signal is transmitted to a video processing device (10) such as a DVR connected to the signal processing module (100) and stored in the video processing device (10). Alternatively, the video signal can be transmitted to the output device (20) such as a monitor connected to the signal processing module (100) so that the video signal is output via the output device (20).

  At this time, the signal processing unit (110) of the signal processing module (100) includes, together with the video signal, channel information in a channel of a port corresponding to the video signal, together with the video signal, the video processing device (10), or Of course, it can be transmitted to the output device (20).

  That is, the amplification module (200) and the signal processing module (100) are equalized to minimize loss in a specific frequency band in which loss such as attenuation or distortion occurs in the video signal depending on the transmission distance of the coaxial cable. A control code for extracting information can be set, and the signal processing module (100) automatically calculates a transmission distance by a coaxial cable connection with the amplification module (200), By controlling the amplification module (200) such that the amplification module (200) amplifies the video signal according to the transmission distance from the signal processing module (100), the video signal is transmitted via the coaxial cable. In order to minimize loss of video signals such as attenuation and distortion that occur during the transmission of The module (200), it is possible to adjust the frequency band specific amplification degree.

  Accordingly, the present invention is preset in order to minimize the loss of the video signal due to the loss or distortion of the video signal generated in the process of transmitting the video signal of the high quality camera 300 through the coaxial cable. Among the equalizing information for each transmission distance range, the equalizing information based on the equalizing information in which the video signal is selected by automatically selecting the equalizing information at the most suitable frequency band corresponding to the transmission distance of the coaxial cable. By automatically amplifying and transmitting the signal, it is possible to support the provision of a high-quality image by minimizing the loss of the image signal, and a high-quality camera corresponding to each different channel ( 300) The most suitable icon for each coaxial cable having different transmission distances for video signal transmission Able to automatically apply the customizing information in the amplification of the video signal, there is an effect that it is possible to provide a video quality equivalent for all channels.

  In addition, since the present invention can transmit the video signal of the camera (300) via a single coaxial cable based on PoC and provide power to the camera (300), CCTV (Closed Circuit) based on TVI and AHD. The complexity of the system for configuring the TeleVision system can be greatly improved.

  On the other hand, the first control unit (130) of the signal processing module (100) corresponds to any one channel in conjunction with the signal processing unit (110) and the distance measurement unit (120) in the configuration described above. When changing the transmission distance of the coaxial cable by changing the arrangement of the camera (300) (when changing the length of the coaxial cable), the change of the transmission distance due to the change of the power consumption of the channel is sensed and the changed transmission The amplification module (200) for amplifying the video signal of the camera (300) with an equalizing pattern corresponding to the distance can be automatically changed, whereby the amplification module (200) converts the video signal with the changed equalizing pattern. The video signal can be transmitted after being amplified.

  Accordingly, the present invention automatically operates so that the video signal is amplified with the equalizing pattern optimized for the changed transmission distance even when the transmission distance is changed by changing the arrangement of the camera (300). In addition to assisting in minimizing the loss of the video signal, it is possible to provide convenience in the arrangement of the camera (300).

  On the other hand, the signal processing module (100) having the above-described configuration is amplified via the amplification module (200) when transmitting the video signal to the video processing device (10) or the output device (20). When the video signal is transmitted as it is, it may be provided in a state in which the hue in the specific frequency band of the video signal is emphasized, so that a video having the same quality as the video signal provided from the camera (300) can be provided. The video signal amplified through the amplification module 200 can be restored, which will be described in detail with reference to FIG.

  As shown in the figure, the signal processing unit (110) of the signal processing module (100) can separate a video signal from the power signal received from the amplification module (200), and the signal processing module (100). The first control unit (130) can recognize the channel of the port corresponding to the received power signal via the signal processing unit (110) in conjunction with the signal processing unit.

  Accordingly, the first control unit (130) identifies the control code corresponding to the recognized channel from the storage unit (150), and the restoration information in the equalizing pattern set in advance corresponding to the control code. Can be extracted.

  At this time, the storage unit 150 may store restoration information corresponding to equalizing information of the amplification module 200 for each control code.

  Through this, when the first control unit (130) receives the power signal in conjunction with the signal processing unit (110), the first control unit (130) provides the restoration information to the signal processing unit (110). The processing unit (110) applies an equalizing pattern based on the restoration information to the video signal separated from the power signal based on the restoration information, and after equalizing, the video processing device (10) or the output device ( 20).

  Through this, the signal processing unit (110) equalizes the video signal changed by amplification in one or more specific frequency bands among the video signals received from the amplification module (200), and the camera (300) It can be restored as similar as possible to the video signal, and high quality video can be provided.

  Through the above configuration, the present invention provides a video signal according to the transmission distance of the video signal corresponding to the length of the coaxial cable for transmitting the video signal of the camera (300) that provides high-quality video based on analog of HD or higher. Thus, in each camera (300) connected by channel, the amplification degree for each frequency band is applied differently, so that it corresponds to the transmission distance of the coaxial cable based on PoC for transmitting the video signal of the camera (300). The optimum equalizing pattern (amplification by frequency band) capable of minimizing the loss of the video signal is applied to the video signal of the camera (300) in accordance with the transmission distance of the coaxial cable corresponding to the camera (300). Therefore, it is possible to prevent image quality deterioration due to video signal loss and distortion, and to achieve high quality on the receiving side that receives the video signal. It is possible to support so as to be able to receive video.

  Through this, the present invention can greatly improve the quality of video provided from a TVTV system based on TVI or AHD that transmits and receives video signals as analog signals.

  Further, according to the present invention, when the arrangement of the camera (300) is changed, the power consumption is automatically measured, and the transmission distance of the video signal according to the length of the coaxial cable changed by the change of the arrangement of the camera (300) is automatically set. Since it is possible to calculate and change the equalization information that can minimize the loss of the video signal based on this, and to automatically change the amplification factor for each frequency band of the video signal, the user's camera (300) arrangement Convenience in the change of can be greatly improved.

The various devices, modules, and components described herein can be implemented by hardware circuits (eg, CMOS-based logic circuits), firmware, software, or a combination thereof.
For example, it can be implemented using transistors, logic gates, and electronic circuits in various electrical structures.

  In addition, it goes without saying that each component of the signal processing module (100) and the amplification module (200) described above can be configured to be included in different components of some components.

  The above contents should be possible to be modified and modified without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention belongs. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical events of the present invention, but to illustrate, and the scope of the technical events of the present invention is limited by such embodiments. It will never be done. The protection scope of the present invention should be construed by the following claims, and all technical events within the equivalent scope should be construed as being included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Image processing apparatus 20 Output apparatus 100 Signal processing module 110 Signal processing part 120 Distance measurement part 130 1st control part 140 Power provision part 150 Storage part 200 Amplification module 210 Power processing part 220 2nd control part 230 Equalizing part 240 Amplifying part 300 camera

Claims (7)

It is connected to a camera that generates a high-quality video signal that is an analog signal, and the amplification unit that amplifies the video signal is different from the equalizing information in the amplification factor for each frequency band of the video signal for each of a plurality of preset control codes. An amplification module including an equalizing unit configured to vary the amplification degree of the amplification unit for each band according to equalizing information on the selected code book; and a different coaxial cable based on the amplification module and PoC The power consumption of the amplifying module, the camera and the coaxial cable is measured via the coaxial cable, and the transmission distance in the coaxial cable is determined based on a preset transmission distance relative power consumption. Calculated and set in advance corresponding to the transmission distance A signal processing module for transmitting a control signal in a control code to the amplification module via the coaxial cable and amplifying the video signal of the camera with an equalizing pattern based on the equalizing information selected by the control signal; Control system for high-quality camera based on coaxial cable. The amplification module combines the video signal amplified through the amplification unit with a power signal, and transmits the signal to the signal processing module through the coaxial cable.
The said signal processing module isolate | separates a video signal from the electric power signal received from the said amplification module, and transmits to the external device connected with the said signal processing module. Control system for high-quality cameras. When the signal processing module receives an amplified video signal via the amplification module, the signal processing module restores the video signal based on preset restoration information corresponding to the control code transmitted to the amplification module. A control system for a high-quality camera based on a coaxial cable according to claim 2. The restoration information is composed of an equalizing pattern for restoring the video signal amplified through the amplification module,
The high-quality camera based on a coaxial cable according to claim 3, wherein the signal processing module equalizes the amplified video signal with an equalizing pattern based on the restoration information and transmits the equalized video signal to the external device. Control system. The signal processing module stores information on the power used by different cameras and different amplification modules corresponding to the respective channels in advance, and connects the amplification module via the coaxial cable to any one of the channels. The power consumption corresponding to the channel is measured, and the remaining power obtained by subtracting the power consumption of each of the camera and the amplification module connected to the channel from the measured power consumption is calculated as the power consumption of the coaxial cable. 2. The control for the high-quality camera based on the coaxial cable according to claim 1, wherein the transmission distance of the coaxial cable is calculated by comparing the power consumption with a power consumption for comparison with the transmission distance set in advance. system. The signal processing module determines whether or not an amplification module can be connected in each channel, and generates and transmits a control signal in the amplification module when connecting the amplification module in any one of the channels. A control system for a high-quality camera based on the coaxial cable according to Item 1. The signal processing module combines the control signal with a power signal and transmits it to the amplification module via the coaxial cable;
The coaxial according to claim 1, wherein the amplification module separates the control signal from the power signal and selects equalizing information on a code book corresponding to a control code selected by the control signal. Control system for high-quality camera based on cable.

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