KR101456251B1 - Camera, dvr and video monitoring system comprising thereof - Google Patents

Abstract

A camera, according to an embodiment of the present invention, comprises: an image data generation unit for generating image data by processing recorded images; a first encoder for converting the image data into an analog transmission signal; a second encoder for converting the image data into a digital transmission signal; and a combined transmission signal generation unit for generating a combined transmission signal which includes at least one of the analog transmission signal and the digital transmission signal.

Description

[0001] CAMERA, DVR AND VIDEO MONITORING SYSTEM COMPRISING THEREOF [0002]

The present invention relates to a camera, a video array, and a video surveillance system including the same.

The camera used in the video surveillance system transmits video data of a specific area to the DVR, and the DVR displays or records the received video data. A method of transmitting video data to a DVR by a camera includes a method of transmitting image data in the form of an analog transmission signal and a method of transmitting in the form of a digital transmission signal. The analog transmission method for transmitting image data in the form of an analog transmission signal is advantageous in that the transmission distance is long because the image data is transmitted using the low frequency region. On the other hand, since the analog transmission method transmits the analog data, And transmits image data that can not be transmitted. In addition, the digital transmission method for transmitting image data in the form of a digital transmission signal is advantageous in that it can transmit clear image data due to strong noise due to transmission. On the other hand, since the image data is transmitted using a high frequency region, There is a drawback that it is short.

If the distance between the camera and the DVR is close to that of the digital transmission method, the DVR can display or record the clear image received from the digital transmission method. Since the distance between the camera and the DVR is too long, If this is not possible, it displays or records the image received by the analog transmission method.

An object of the present invention is to select a camera and a DVR using an analog video transmission method when a video transmission distance between a camera and a DVR used in a video surveillance system is long, In order to solve the problem of selecting a camera and a DVR using a video transmission method, it is necessary to provide a video surveillance camera and a DVR capable of reducing the complexity and cost of a video surveillance system composed of a camera and a DVR, have.

The technical problems of the present invention are not limited to the above-mentioned technical problems, and other technical problems which are not mentioned can be clearly understood by the operator from the following description.

A camera according to an embodiment of the present invention includes an image data generation unit for processing image data to generate image data, a first encoder for converting the image data into an analog transmission signal, A second encoder, and a combined transmission signal generator for generating a combined transmission signal including at least one of the analog transmission signal and the digital transmission signal.

In one embodiment, the combined transmission signal generator may allocate the analog transmission signal to the first frequency domain and allocate the digital transmission signal to the second frequency domain to generate the combined transmission signal.

In one embodiment, the first frequency region may be defined as a region having a lower frequency than the second frequency region.

In one embodiment, the first encoder may include a low-pass filter that transmits the analog transmission signal to the combined transmission signal generator.

In one embodiment, the second encoder may include a high pass filter that transfers the digital transmission signal to the combined transmission signal generator.

In one embodiment, the first encoder may be configured such that at least one of the resolution and the frame rate is different from the image data generation unit.

In one embodiment, the second encoder may be configured such that at least one of the resolution and the frame rate is different from the image data generation unit.

In one embodiment, the display area defined based on the analog transmission signal may be part of a display area defined based on the image data.

In one embodiment, the display area defined based on the digital transmission signal may be part of a display area defined based on the image data.

In one embodiment, the communication interface unit may transmit the combined transmission signal to an external terminal.

The DVI according to an embodiment of the present invention includes a communication interface for receiving a combined transmission signal from a camera, a first interface for converting the analog transmission signal into first image data when the combined transmission signal includes an analog transmission signal, A second decoder for converting the digital transmission signal into second image data when the combined transmission signal includes a digital transmission signal, and a second decoder for selecting at least one of the first image data and the second image data to output And a data control unit.

In one embodiment, the first decoder detects a vertical synchronization signal, a horizontal synchronization signal, and a color reference signal of an analog transmission signal standard included in the analog transmission signal from the combined transmission signal, and outputs the detected vertical synchronization signal and horizontal synchronization signal And generates a first discrimination information indicating whether the analog transmission signal is included in the combined transmission signal by using the detected vertical synchronizing signal, the horizontal synchronizing signal and the color reference signal, The first resolution information can be generated.

In one embodiment, the first decoder may transmit the first discrimination information and the first resolution information to the data control unit.

In one embodiment, the second decoder detects vertical synchronization information, horizontal synchronization information, and effective pixel information of a digital transmission signal standard included in the digital transmission signal from the combined transmission signal, and outputs the detected vertical synchronization information and horizontal synchronization information Generating second identification information indicating whether the digital transmission signal is included in the combined transmission signal by using the detected vertical synchronization information, horizontal synchronization information, and effective pixel information based on the digital transmission signal, The second resolution information can be generated.

In one embodiment, the second decoder may transmit the second determination information and the second resolution information to the data control unit.

In one embodiment, the data controller may select at least one of the first image data and the second image data based on at least one of the first determination information and the second determination information.

In one embodiment, the communication interface includes a first buffer for passing the combined transmission signal received from the camera and for blocking a first reflected signal from the first decoder, a second buffer for transmitting a combined transmission signal passed through the first buffer A second buffer for passing the combined transmission signal received from the camera and for blocking a second reflected signal from the second decoder, and a second buffer for passing the combined signal received from the camera, And a second capacitor for removing the DC component of the combined transmission signal that has passed through the buffer and transmitting the removed DC component to the second decoder.

In one embodiment, the communication interface includes a first buffer for passing the combined transmission signal received from the camera and for blocking a first reflected signal from the first decoder, a second buffer for transmitting a combined transmission signal passed through the first buffer A first capacitor for removing a DC component and delivering the DC component to the first decoder, and a second capacitor for removing a DC component of the combined transmission signal received from the camera and transmitting the removed DC component to the second decoder.

In one embodiment, the communication interface unit includes a resistor for passing the combined transmission signal received from the camera and for attenuating the first reflected signal from the first decoder, a DC component of the combined transmission signal passing through the resistor And a second capacitor for removing the DC component of the combined transmission signal received from the camera and transmitting the removed DC component to the second decoder.

In one embodiment, the communication interface includes a buffer for passing the combined transmission signal received from the camera, reducing the influence of the first reflected signal from the first decoder and the second reflected signal from the second decoder, A first capacitor for removing the DC component of the combined transmission signal that has passed through the buffer and transmitting the removed DC component to the first decoder, and a second capacitor for removing the DC component of the combined transmission signal passing through the buffer and delivering the DC component to the second decoder, . ≪ / RTI >

In one embodiment, the communication interface unit may include a single capacitor that removes a DC component of the combined transmission signal received from the camera and transmits the DC component to the first decoder and the second decoder.

The video surveillance system according to an embodiment of the present invention processes image data to generate image data, converts the image data into an analog transmission signal and a digital transmission signal, combines the analog transmission signal and the digital transmission signal, A camera for generating a combined transmission signal, and a controller for analyzing the combined transmission signal transmitted from the camera to convert the analog transmission signal included in the combined transmission signal into first image data, And converting the transmission signal into second image data and selecting and displaying at least one of the first image data and the second image data.

According to the camera, the DVR, and the video surveillance system including the camera, the DVR and the video surveillance system according to an embodiment of the present invention, the video surveillance system and the DVR And a video surveillance system.

1 is a block diagram showing a camera according to an embodiment of the present invention.
2 is a diagram for explaining a frequency domain of a combined transmission signal according to an embodiment of the present invention.
FIG. 3 is a block diagram showing a DV array according to an embodiment of the present invention.
4 to 8 are block diagrams illustrating the communication interface unit of FIG. 3 according to various embodiments.
9 is a block diagram illustrating a video surveillance system according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

1 is a block diagram showing a camera according to an embodiment of the present invention. 2 is a diagram for explaining a frequency domain of a combined transmission signal according to an embodiment of the present invention.

1, a camera 100 according to an exemplary embodiment of the present invention includes an image data generation unit 110, a first encoder 120, a second encoder 130, a combined transmission signal generation unit 140 ), And a communication interface unit 150.

The image data generation unit 110 may convert an optical signal input through a lens (not shown) into an electrical signal, and process the electrical signal to generate image data. For example, the image data generation unit 110 may process the electrical signal to generate digital image data.

The image data generation unit 110 may convert an optical signal into an electrical signal using a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) image sensor. The image data generation unit 110 processes electric signals for generating image data and can be implemented as an image signal processor (ISP). The image data generation unit 110 may generate image data having various resolutions according to the setting. In addition, the image data generation unit 110 may generate image data having various frame rates according to the setting.

The first encoder 120 may convert the image data transmitted from the image data generation unit 110 into an analog transmission signal. That is, the first encoder 120 adapts the image data generated by the image data generation unit 110 to the analog image transmission standard and converts the digital image data into an analog transmission signal using a DAC (Digital to Analog Converter) . For example, the analog video transmission standard may include an NTSC, PAL, SECAM, or HD / UHD class image converted into an analog transmission signal.

The first encoder 120 may have a resolution different from the resolution of the image data generation unit 110. That is, the resolution of the analog transmission signal generated by the first encoder 120 may be different from the resolution of the image data generated by the image data generation unit 110. In addition, the first encoder 120 may have a frame rate different from the frame rate of the image data generator 110. That is, the frame rate of the analog transmission signal generated by the first encoder 120 may be different from the frame rate of the image data generated by the image data generation unit 110.

The first encoder 120 may generate an analog transmission signal having a display area different from that of the image data generated by the image data generator 110. That is, the display area defined on the basis of the analog transmission signal generated by the first encoder 120 may be part of the display area defined based on the image data generated by the image data generator 110. The first encoder 120 may include a low pass filter (LPF) 121 to prevent the analog transmission signal in the low frequency range from affecting the digital transmission signal in the high frequency range.

The second encoder 130 may convert the image data transmitted from the image data generation unit 110 into a digital transmission signal. That is, the second encoder 130 can convert the image data generated from the image data generation unit 110 according to the digital image transmission standard, thereby generating a digital transmission signal. For example, the digital video transmission standard may include HD-SDI or SD-SDI.

The second encoder 130 may have a resolution different from the resolution of the image data generator 110 and / or the first encoder 120. For example, the resolution of the digital transmission signal generated by the second encoder 130 is determined by the resolution of the image data generated by the image data generation unit 110 and / May differ from the resolution of the analog transmission signal. The second encoder 130 may have a frame rate different from the frame rate of the image data generator 110 and / or the first encoder 120. That is, the frame rate of the digital transmission signal generated by the second encoder 130 may be the frame rate of the image data generated by the image data generation unit 110 and / or the frame rate of the image data generated by the first encoder 120 And may differ from the frame rate of the analog transmission signal.

The second encoder 130 may generate a digital transmission signal having a display area different from the image data generated by the image data generator 110 and / or the analog transmission signal generated by the first encoder 120 . That is, the display area defined on the basis of the digital transmission signal generated by the second encoder 130 is displayed on the display area defined based on the image data generated by the image data generator 110 and / 120, < / RTI >

The second encoder 130 may include a high pass filter (HPF) 131 to prevent the digital transmission signal in the high frequency range from affecting the analog transmission signal in the low frequency range.

The combined transmission signal generating unit 140 may generate a combined transmission signal including at least one of an analog transmission signal transmitted from the first encoder 120 and a digital transmission signal transmitted from the second encoder 130. [

The combined transmission signal generating unit 140 may generate an combined transmission signal by selecting only an analog transmission signal transmitted from the first encoder 120. [ The combined transmission signal generating unit 140 may select only the digital transmission signal transmitted from the second encoder 130 and generate a combined transmission signal.

2, the combined transmission signal generator 140 allocates an analog transmission signal transmitted from the first encoder 120 to a first frequency region, and outputs a digital transmission signal May be allocated to the second frequency domain to generate a combined transmission signal. For example, the first frequency region may be defined as a region having a lower frequency than the second frequency region.

The communication interface unit 150 can transmit the generated combined transmission signal to an external terminal (ex. DVR) through a transmission cable. For example, the transmission cable may be a coaxial cable. The communication interface unit 150 can receive a camera control command from an external terminal (ex. DVR). The received command is transmitted to the image data generation unit 110, the first encoder 120, the second encoder 130, the combined transmission signal generation unit 140, and the communication interface (not shown) (150). The communication interface unit 150 can transmit not only the combined transmission signal but also various information (e.g., motion information of the object) generated by the camera 100 to an external terminal (e.g., DVR).

As described above, the camera 100 according to an embodiment of the present invention converts the generated image data into an analog transmission signal and a digital transmission signal, respectively, and outputs a combined transmission signal, which is an analog transmission signal and a digital transmission signal, (ex. DVR).

Accordingly, the DV 200 can selectively decode the analog transmission signal and / or the digital transmission signal according to the image transmission distance. As a result, if the image transmission distance is long depending on the distance, it is necessary to select a camera and a DVR that use the analog video transmission method. If the video transmission distance is close to the predetermined distance, A video surveillance camera 100 capable of reducing the complexity and the unit cost and enabling high-quality surveillance can be provided.

FIG. 3 is a block diagram showing a DV array according to an embodiment of the present invention.

3, a DEV 200 according to an exemplary embodiment of the present invention includes a communication interface 210, a first decoder 220, a second decoder 230, and a data controller 240 .

The communication interface unit 210 may receive a combined transmission signal transmitted from the camera 100 through a transmission cable. For example, the transmission cable may be a coaxial cable. The communication interface unit 210 may transmit a camera control command necessary for controlling the camera 100 to the camera 100. [ The communication interface unit 210 can receive not only image information from the camera 100 but also various information (e.g., motion information of objects) generated by the camera 100. [

The first decoder 220 may convert the analog transmission signal into the first image data when the analog transmission signal is included in the combined transmission signal transmitted through the communication interface 210. The first decoder 220 may transmit the first video data to the data controller 240.

The first decoder 220 determines whether or not the vertical synchronization signal V Sync, the horizontal synchronization signal H Sync, and the color reference signal (Color Sub-Carrier) of the analog transmission signal standard included in the analog transmission signal, Frequency and the like can be detected.

The first decoder 220 may generate first discrimination information indicating whether an analog transmission signal is included in the combined transmission signal using the detected vertical synchronization signal V Sync and horizontal synchronization signal H Sync . This is because the analog transmission signal is transmitted according to the analog transmission standard and the digital transmission signal is transmitted according to the digital transmission standard so that the vertical synchronization signal and the horizontal synchronization signal are detected only when there is an analog transmission signal in the combined transmission signal. The first decoder 220 may transmit the first discrimination information to the data control unit 240.

The first decoder 220 can extract the first resolution information based on the received analog transmission signal using the detected vertical synchronization signal, horizontal synchronization signal, and color reference signal.

The first decoder 220 may be implemented as a video decoder. The first decoder 220 includes an amplifier (not shown) for amplifying a combined transmission signal, an ADC (Analog to Digital Converter) (not shown) for converting an analog transmission signal into a digital signal, a monochrome component Y and a color component C, (Not shown), a color demodulator (not shown) for demodulating color components, and an image quality corrector (not shown) for correcting image quality.

The second decoder 230 may convert the digital transmission signal into the second image data when the combined transmission signal transmitted through the communication interface 210 includes the digital transmission signal. The second decoder 230 may transmit the second image data to the data controller 240.

The second decoder 230 can detect vertical synchronization information (V Sync), horizontal synchronization information (H Sync), and effective pixel information (Active Pixel) of the digital transmission signal standard included in the digital transmission signal from the combined transmission signal have.

The second decoder 230 may generate second determination information indicating whether a digital transmission signal is included in the combined transmission signal using the detected vertical synchronization information V Sync and horizontal synchronization information H Sync . This is because the digital transmission signal is transmitted according to the digital transmission standard and the analog transmission signal is transmitted according to the analog transmission standard so that the vertical synchronization information and the horizontal synchronization information are detected only when there is a digital transmission signal in the transmission signal. And the second decoder 230 may transmit the second determination information to the data control unit 240. [

The second decoder 230 can extract the second resolution information based on the received digital image signal using the detected vertical synchronization information, horizontal synchronization information, and effective pixel information.

The second decoder 230 may be implemented as an SDI receiver. The second decoder 230 includes an amplifier (not shown) for amplifying a transmission signal, a PLL (Phase Locked Loop) for extracting a clock, SERDES (Serialize and Deserialize) for converting serial data into parallel data, And an image quality corrector (not shown) for correcting the image quality.

The data control unit 240 selects at least one of the first video data and the second video data using the first discrimination information and the second discrimination information transmitted from the first decoder 220 and the second decoder 230 Can be output. For example, the data control unit 240 can output only the first image data when only the first discrimination information is received, and only the second image data when only the second discrimination information is received. The data control unit 240 may output both the first image data and the second image data when both the first discrimination information and the second discrimination information are received. When both the first image data and the second image data are output, the data control unit 240 can independently perform recording and storage of the first image data and the second image data. The data control unit 240 can determine the resolution of the corresponding first image data and second image data based on the first resolution information and the second resolution information.

4 to 8 are block diagrams illustrating the communication interface unit of FIG. 3 according to various embodiments.

4 to 8 illustrate a combined transmission signal received by the communication interface 210 of the DEV 200 according to an embodiment of the present invention to a first decoder 220 and a second decoder 230 FIG. 4 is a block diagram showing specific configurations of the communication interface unit 210 that branches. FIG.

4, the communication interface 210a includes a first buffer 211a for passing a combined transmission signal received from the camera 100 and for blocking a first reflection signal from the first decoder 220, A first capacitor 212a for removing the DC component of the combined transmission signal that has passed through the first buffer 211a and delivering it to the first decoder 220, A second buffer 213a for blocking the second reflected signal from the first decoder 230 and a DC component of the combined transmission signal that has passed through the second buffer 213a and forwards the removed DC component to the second decoder 230 And a second capacitor 214a.

For example, the first reflected signal may be a signal reflected due to an impedance mismatch when the combined transmitted signal is transmitted to the first decoder 220. For example, the second reflected signal may be a signal that is reflected due to an impedance mismatch when the combined transmitted signal is transmitted to the second decoder 230. 5 uses the first buffer 211a and the second buffer 213a to transmit the combined transmission signals to the first decoder 220 and the second decoder 230, It is possible to prevent the interference of

5, the communication interface 210b includes a first buffer 211b for passing a combined transmission signal received from the camera 100 and for blocking a first reflection signal from the first decoder 220, A first capacitor 212b for removing the DC component of the combined transmission signal that has passed through the first buffer 211b and transmitting the removed DC component to the first decoder 220 and the DC component of the combined transmission signal received from the camera 100 And a second capacitor 213b for transferring the data to the second decoder 230. [

6, the communication interface 210c includes a resistor 211c that passes a combined transmission signal received from the camera 100 and attenuates a first reflected signal from the first decoder 220, a resistor 211c A first capacitor 212c for removing the DC component of the combined transmission signal having passed through the first decoder 220 and transmitting the removed DC component to the first decoder 220 and a second decoder 212c for removing the DC component of the combined transmission signal received from the camera 100, 230 to the second condenser 213c.

7, the communication interface 210d passes the combined transmission signal received from the camera 100 and outputs a first reflection signal from the first decoder 220 and a second reflection signal from the second decoder 230 A buffer 211d for reducing the influence of the reflected signal, a first capacitor 212d for removing the DC component of the combined transmission signal that has passed through the buffer 211d and delivering it to the first decoder 220, and a buffer 211d And a second capacitor 213d for removing the DC component of the combined transmission signal and transmitting the removed DC component to the second decoder 230. [

8, the communication interface 210e includes a single capacitor 211e for removing the DC component of the combined transmission signal received from the camera 100 and transmitting the removed DC component to the first decoder 220 and the second decoder 230, . ≪ / RTI > That is, according to the communication interface 210e shown in FIG. 8, the combined transmission signal from which the DC component is removed using one capacitor 211e is transmitted to the first decoder 220 and the second decoder 230 can do.

9 is a block diagram illustrating a video surveillance system according to an embodiment of the present invention.

Referring to FIG. 9, the video surveillance system 1000 according to an embodiment of the present invention may include a camera 100 and a DVR 200.

The camera 100 may be substantially the same as that described with reference to Fig. The DEV 200 may be substantially the same as that described with reference to FIG.

Referring to the description of the camera 100 and the DV 200, the camera 100 converts the generated image data into an analog transmission signal and a digital transmission signal, respectively, and combines the analog transmission signal and the digital transmission signal The combined transmission signal can be transmitted to an external terminal (ex. DVR). Accordingly, the DIVAL 200 can selectively decode and display or record an analog transmission signal and / or a digital transmission signal according to the image transmission distance.

Therefore, when the distance of image transmission is long according to the distance, it is necessary to select cameras and DVRs using the analog video transmission method, and when the image transmission distance is short, A video surveillance system 1000 capable of reducing complexity and unit cost and enabling high-quality surveillance can be provided.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

100: camera
110:
120: first encoder
130: second encoder
140: combined transmission signal generating unit
150:
200: DV Al
210:
220: first decoder
230: second decoder
240:
211a, 213a, 211b, and 211d:
212a, 214a, 212b, 213b, 212c, 213c, 212d, 213d, 211e:
211c: Resistance

Claims (22)

An image data generation unit for processing the photographed image to generate image data;
A first encoder for converting the image data into an analog transmission signal;
A second encoder for converting the image data into a digital transmission signal; And
And a combined transmission signal generator for generating a combined transmission signal including at least one of the analog transmission signal and the digital transmission signal,
Wherein the combined transmission signal generator allocates the analog transmission signal to a first frequency domain and allocates the digital transmission signal to a second frequency domain to generate the combined transmission signal, A camera defined as a region having a lower frequency. delete delete The method according to claim 1,
Wherein the first encoder includes a low-pass filter for transmitting the analog transmission signal to the combined transmission signal generator. The method according to claim 1,
And the second encoder includes a high-pass filter for transmitting the digital transmission signal to the combined transmission signal generator. The method according to claim 1,
Wherein the first encoder is configured to have at least one of a resolution and a frame rate different from the image data generation unit. The method according to claim 1,
Wherein the second encoder is configured such that at least one of the resolution and the frame rate is different from the image data generation unit. The method according to claim 1,
Wherein the display area defined based on the analog transmission signal is part of a display area defined based on the image data. The method according to claim 1,
Wherein the display area defined based on the digital transmission signal is part of a display area defined based on the image data. The method according to claim 1,
And a communication interface for transmitting the combined transmission signal to an external terminal. A communication interface for receiving a combined transmission signal from a camera;
A first decoder for converting the analog transmission signal into first image data when the combined transmission signal includes an analog transmission signal;
A second decoder for converting the digital transmission signal into second image data when the combined transmission signal includes a digital transmission signal; And
And a data control unit for selecting and outputting at least one of the first image data and the second image data,
Wherein the combined transmission signal includes the analog transmission signal allocated to the first frequency region and the digital transmission signal allocated to the second frequency region, and the first frequency region is a region having a lower frequency than the second frequency region Defined egg. 12. The method of claim 11,
The first decoder detects a vertical synchronizing signal and a horizontal synchronizing signal of the analog transmission signal standard from the combined transmission signal, and the analog transmission signal is included in the combined transmission signal using the detected vertical synchronizing signal and the horizontal synchronizing signal The first discrimination information indicating whether or not the first discrimination information is included in the first discrimination information. 13. The method of claim 12,
And the first decoder transmits the first discrimination information to the data control unit. 14. The method of claim 13,
The second decoder detects vertical synchronization information and horizontal synchronization information of the digital transmission signal standard from the combined transmission signal and the digital transmission signal is included in the combined transmission signal using the detected vertical synchronization information and horizontal synchronization information The second discrimination information indicating whether or not the first discrimination information is included in the second discrimination information. 15. The method of claim 14,
And the second decoder transfers the second determination information to the data control unit. 16. The method of claim 15,
Wherein the data controller selects and outputs at least one of the first image data and the second image data based on at least one of the first determination information and the second determination information. 12. The method of claim 11,
Wherein the communication interface unit comprises: a first buffer for passing the combined transmission signal received from the camera and for blocking a first reflection signal from the first decoder;
A first capacitor for removing a DC component of a combined transmission signal that has passed through the first buffer and transmitting the removed DC component to the first decoder;
A second buffer for passing the combined transmission signal received from the camera and for blocking a second reflected signal from the second decoder; And
And a second capacitor for removing the DC component of the combined transmission signal that has passed through the second buffer and transmitting the removed DC component to the second decoder. 12. The method of claim 11,
Wherein the communication interface unit comprises: a first buffer for passing the combined transmission signal received from the camera and for blocking a first reflection signal from the first decoder;
A first capacitor for removing a DC component of a combined transmission signal that has passed through the first buffer and transmitting the removed DC component to the first decoder; And
And a second capacitor for removing the DC component of the combined transmission signal received from the camera and transmitting the removed DC component to the second decoder. 12. The method of claim 11,
Wherein the communication interface unit comprises: a resistor for passing the combined transmission signal received from the camera and for attenuating a first reflection signal from the first decoder;
A first capacitor for removing the DC component of the combined transmission signal having passed through the resistor and transmitting the removed DC component to the first decoder; And
And a second capacitor for removing the DC component of the combined transmission signal received from the camera and transmitting the removed DC component to the second decoder. 12. The method of claim 11,
Wherein the communication interface unit comprises: a buffer for passing the combined transmission signal received from the camera and reducing an influence of a first reflection signal from the first decoder and a second reflection signal from the second decoder;
A first capacitor for removing the DC component of the combined transmission signal that has passed through the buffer and transmitting the removed DC component to the first decoder; And
And a second capacitor for removing the DC component of the combined transmission signal that has passed through the buffer and transmitting the removed DC component to the second decoder. 12. The method of claim 11,
Wherein the communication interface unit includes a single capacitor for removing a DC component of the combined transmission signal received from the camera and transmitting the removed DC component to the first decoder and the second decoder. A camera for processing the photographed image to generate image data, converting the image data into an analog transmission signal and a digital transmission signal, respectively, and generating a combined transmission signal combining the analog transmission signal and the digital transmission signal; And
And a controller for analyzing the combined transmission signal transmitted from the camera to convert the analog transmission signal included in the combined transmission signal into first image data and converting the digital transmission signal included in the combined transmission signal into second image data And a display unit for displaying and / or recording at least one of the first image data and the second image data,
Wherein the camera generates the combined transmission signal by assigning the analog transmission signal to a first frequency region and allocating the digital transmission signal to a second frequency region, wherein the first frequency region is a frequency lower than the second frequency region Wherein the region is defined as a region having a plurality of pixels.

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