JP2008206096A - On-vehicle video communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle video communication system which simplifies wiring between a plurality of image pickup devices and a video processing device, decreases a cable length and is further capable of attaining miniaturization of the devices. <P>SOLUTION: The present invention relates to an on-vehicle video communication system which is mounted on a vehicle and comprises: a plurality of image pickup devices 1, 2, 3 for transmitting video data obtained by image pickup; a video processing device 21 for processing digital video data and an on-vehicle video repeater to which the plurality of image pickup devices 1, 2, 3 and the video processing device 21 are connected via cables, respectively, and which transmits video data transmitted from the image pickup devices 1, 2, 3 to the video processing device, wherein the one or the plurality of image pickup devices 2, 3 are configured to transmit analog video data and the on-vehicle video repeater 50 comprises a conversion means for converting the analog video data transmitted from the image pickup devices 2, 3 into digital video data and a means for transmitting the digital video data to the video processing device 21 selectively or after multiplexing the digital video data. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an in-vehicle video communication system that transmits video data acquired by an imaging device mounted on a vehicle to a video processing device through a communication line.

  In recent years, in order to prevent traffic accidents, a plurality of imaging devices mounted on a vehicle image the periphery of the vehicle, and the captured images are displayed on a display device such as a head-up display or a car navigation display. It has been broken.

FIG. 6 is a block diagram showing an example of a conventional in-vehicle video communication system. The in-vehicle video communication system includes a plurality of first to third imaging devices 1, 2, and 3 mounted on a vehicle. The first to third imaging devices 1, 2, and 3 include first to third imaging devices, respectively. Three video processing apparatuses 21, 22, and 23 are connected one-to-one via cables. The first to third video processing devices 21, 22, and 23 perform processing such as detection of a traveling position of a vehicle, detection of a pedestrian, and warning by processing video data.
JP 2006-25188 A

  On the other hand, with the improvement of the processing capability of video processing devices, the increase in functionality, and the increase in the number of imaging devices mounted on vehicles, it is necessary to connect a plurality of imaging devices to a single video processing device. When the image processing apparatus is provided with a plurality of connection terminals and the image capturing apparatus is cable-connected, there arises a problem that the wiring between the image capturing apparatus and the image processing apparatus is complicated and enlarged. Further, there is a problem that the size of each device increases as the number of connection terminals increases.

  FIG. 7 is a block diagram schematically showing an example of a problem in the connection method described above. Three first to third imaging devices 1, 2, 3 are cable-connected to one second video processing device 32, and two first and third imaging devices 21, 23 are connected to the third video processing device 33. Is connected, the second video processing device 32 needs to have three connection terminals, and the third video processing device 33 needs to have two connection terminals. For this reason, the second and third video processing devices 32 and 33 are increased in size. Further, the wiring state of the cable is complicated as shown in FIG. Further, when the first imaging device 21 is connected to the three first to third video processing devices 21, 22, and 23 by cable, the first imaging device 21 also needs to be provided with three connection terminals. The imaging device 21 is also increased in size.

In addition, when an imaging device that transmits analog video data and an imaging device that transmits digital video data are mixed, the video processing device has an analog connection terminal, a digital connection terminal, and AD conversion. There is a problem that the image processing apparatus is increased in size.
In particular, in the automobile field, while the use of electronics is progressing, it is required to reduce the size of the vehicle and expand the interior space. For this reason, space saving is also required for various in-vehicle devices and cable portions, and the above-mentioned problems are becoming serious.

  The present invention has been made in view of such circumstances, and collects and AD-converts video data obtained by imaging by a plurality of imaging devices, and converts the AD-converted digital video data into a single communication line, For example, by providing an in-vehicle video repeater that selectively or multiplexes through a cable and transmits it to a video processing device, the wiring between a plurality of imaging devices and video processing devices is simplified, the total cable length is reduced, and analog video It is an object of the present invention to provide an in-vehicle video communication system that can be configured with a small video processing device that does not include a connection terminal for data reception and an A / D conversion unit.

  Another object of the present invention is to provide a branching unit that performs analog-to-digital conversion of analog video data obtained by imaging by an imaging device and distributes the digital video data that has been converted to a plurality of video processing devices. The wiring between the imaging device and the plurality of video processing devices can be simplified, the total cable length can be reduced, and a small video processing device without analog video data receiving connection terminals and A / D converters can be configured. It is to provide a vehicle-mounted video communication system.

  Another object of the present invention is to provide the in-vehicle video repeater and the branching device, thereby simplifying the wiring between the plurality of imaging devices and the plurality of video processing devices, reducing the total cable length, and further providing analog video data. It is an object of the present invention to provide an in-vehicle video communication system that can be configured by a small video processing device that does not include a connection terminal for reception and an A / D conversion unit.

  An in-vehicle video communication system according to a first aspect of the present invention is mounted on a vehicle, and includes a plurality of imaging devices that transmit video data obtained by imaging, a video processing device that processes digital video data, and the plurality of imaging devices. An in-vehicle video communication system comprising: an on-vehicle video repeater that selectively or multiplexes video data transmitted from a device and transmits the video data to the video processing device, wherein one or a plurality of the imaging devices receives analog video data The in-vehicle video repeater converts the analog video data transmitted from the imaging device into digital video data, and a connection unit to which the plurality of imaging devices and the video processing device are connected. And an A / D converter for transmitting digital video data to the video processing device.

In the first invention, the plurality of imaging devices and the video processing devices are connected to the connection portion of the in-vehicle video repeater, and the video data obtained by each imaging device is selectively or multiplexed. It is transmitted to the video processing device. In other words, video data obtained by a plurality of imaging devices is transmitted to the video processing device through a single communication line, for example, a cable, connected to the video processing device.
Therefore, even if the number of imaging devices to be connected to the video processing device increases, the number of interfaces does not increase and the video processing device does not increase in size. Further, the communication line is not complicated and enlarged.
On the other hand, one or a plurality of imaging devices are configured to transmit analog video data to the in-vehicle video repeater, and the in-vehicle video repeater converts the analog video data into digital video data to generate a video processing device. Send to. Therefore, it is not necessary to provide the video processing device with a connection terminal for receiving analog video data and an AD converter, and the video processing device can be downsized.
The means for connecting the imaging device, the in-vehicle video repeater, and the video processing device is not limited to a cable as long as video data can be transmitted, and may be configured by a cord, a lead, an optical fiber, or the like.

  An in-vehicle video communication system according to a second aspect of the present invention is mounted on a vehicle, and an imaging device that transmits analog video data obtained by imaging, a plurality of video processing devices that process digital video data, and the imaging An on-vehicle video communication system including a branching unit that distributes video data transmitted from the device, wherein the branching unit includes a connection unit to which the imaging device and the plurality of video processing devices are connected, and the imaging device. An A / D converter that converts the transmitted analog video data into digital video data is provided, and the digital video data is transmitted to the plurality of video processing devices.

In the second invention, the imaging device and the plurality of video processing devices are connected to the branching device, and video data obtained by imaging by the imaging device is distributed to each video processing device.
Therefore, even if the number of imaging devices to be connected to the video processing device increases, the number of interfaces does not increase and the video processing device does not increase in size. Further, the communication line is not complicated and enlarged.
On the other hand, the imaging apparatus is configured to transmit analog video data to the in-vehicle video repeater. However, the in-vehicle video relay converts the analog video data into digital video data and transmits the digital video data to the video processing apparatus. Therefore, it is not necessary to provide the video processing device with a connection terminal for receiving analog video data and an AD converter, and the video processing device can be downsized.

  An in-vehicle video communication system according to a third aspect of the invention is mounted on a vehicle, and includes a first imaging device and a second imaging device that transmit analog video data obtained by imaging, and a first that processes digital video data. A video processing device and a second video processing device, a branching unit that distributes video data transmitted from the first imaging device, and video data transmitted from the first and second imaging devices are selectively or multiplexed. A vehicle-mounted video communication system that transmits to the second video processing device, wherein the branching device is connected to the first imaging device, the first video processing device, and the vehicle-mounted video relay device. And an A / D converter that converts the video data transmitted from the first imaging device into digital video data, and the digital video data is converted into the first video processing device and the in-vehicle video. The vehicle-mounted video repeater is transmitted from the second imaging device and the connection unit to which the branching device, the second imaging device, and the second video processing device are connected. And an A / D converter for converting the video data into digital video data, wherein the digital video data is transmitted to the second video processing device.

In the third invention, the first imaging device is connected to the first video processing device via the branching unit. The branching unit AD-converts analog video data obtained by imaging by the first imaging device into digital video data by the A / D converter, and distributes the AD-converted digital video data to the first video processing device. To do. The branching unit is connected to the in-vehicle video repeater, and the digital video data is also distributed to the in-vehicle video repeater.
The second imaging device is connected to the in-vehicle video repeater. The in-vehicle video repeater AD converts analog video data obtained by imaging by the second imaging device into digital video data by an A / D converter. The in-vehicle video repeater selectively or multiplexes the AD data-converted video data of the first imaging device and the second imaging device and relays them to the second video processing device.
Accordingly, the video processing apparatus with an increased interface is compared with the case where the first imaging device is connected to the first and second video processing devices in a one-to-two connection and the second imaging device is connected to the second video processing device in a one-to-two connection. Increase in size can be suppressed. Moreover, the complexity and enlargement of the cable can be suppressed.
Therefore, even if the number of imaging devices to be connected to the video processing device increases, the number of interfaces does not increase and the video processing device does not increase in size. Further, the communication line is not complicated and enlarged.
Furthermore, it is not necessary to provide each video processing device with a connection terminal for receiving analog video data and an AD converter, and the video processing device can be miniaturized.

  According to the first aspect of the present invention, the wiring between the plurality of imaging devices and the video processing device is simplified, the total cable length is reduced, and the small video without the connection terminal for analog video data reception and the A / D conversion unit. It can be configured by a processing device. Particularly, in recent years, there has been a demand for miniaturization of vehicles and expansion of the interior space of vehicles, so that the present invention for in-vehicle use is particularly effective.

  According to the second aspect of the present invention, the wiring between the imaging device and the plurality of video processing devices is simplified, the total cable length is reduced, and the small video without the connection terminal for analog video data reception and the A / D conversion unit. It can be configured by a processing device.

  According to the third invention, the wiring between the plurality of imaging devices and the plurality of video processing devices is simplified, the total cable length is reduced, and the connection terminal for receiving analog video data and the A / D conversion unit are not provided. The video processing apparatus can be configured.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
FIG. 1 is a block diagram showing an in-vehicle video communication system according to an embodiment of the present invention, and FIG. 2 is a schematic diagram showing a configuration of the in-vehicle video communication system mounted on a vehicle. The in-vehicle video communication system includes network portions A and B in which wiring is simplified and various devices are miniaturized.

  The network part A includes first to fourth imaging devices 1, 2, 3, and 4 that transmit either digital video data or analog video data, and first to third video processing devices that process digital video data. 21, 22, 23, an in-vehicle video repeater 50 having an AD conversion function, and first and second branching devices 41, 42 are provided. The first and second imaging devices 1 and 2 and the fourth imaging device 4 transmit analog video data obtained by imaging, and the third imaging device 3 transmits digital video data obtained by imaging.

  The first imaging device 1 is provided, for example, at a substantially central portion in the lateral direction at the rear of the vehicle, and is configured to externally transmit analog video data obtained by imaging with visible light, infrared light, far infrared light, or the like through a cable. Has been. The second imaging device 2 and the fourth imaging device 4 have the same configuration as that of the first imaging device 1, and the third imaging device 3 has a similar configuration except that only digital video data is transmitted. The configuration of one imaging device 1 will be described. Note that the second imaging device 2 is provided in a substantially central portion in the lateral direction of the rear portion of the vehicle, and the third imaging device 3 is provided in a side portion of the vehicle. The fourth image pickup device 4 is provided at a substantially central portion of the vehicle.

The first imaging device 1 includes a lens for imaging the periphery of an automobile, an imaging element, a signal processing circuit, a transmission circuit, and the like.
The imaging element is composed of, for example, a CCD (Charge Coupled Device) that captures an image with visible light, a CMOS (Complementary Metal Oxide Semiconductor), and the like, and converts an image formed by the lens into an analog electrical signal.
The signal processing circuit includes a correlated double sampling circuit, an auto gain control circuit, a video processing microprocessor, and the like. The signal processing circuit performs processing such as noise reduction processing and gain adjustment on the electrical signal converted by the image sensor and supplies the processing result to the transmission circuit. The video data includes data indicating the luminance value of the pixel of each frame constituting the video and a header portion. The header portion includes ID information for identifying the first to fourth imaging devices 1, 2, 3, 4 such as a MAC address. The ID information is stored in a nonvolatile memory (not shown), and the signal processing circuit is configured to add the ID information stored in the nonvolatile memory to the header portion of the video data.
The transmission circuit transmits analog video data, for example, video data such as a composite signal, an S video signal, a YCbCr signal, an RGB signal, etc. conforming to NTSC (National Television System Committee Standard) or PAL (Phase Alternating Line) format, It transmits to the vehicle-mounted video relay device 50 via the branching device 41.
Note that the transmission circuit of the third imaging device 3 is configured to transmit digital video data.

  FIG. 3 is a block diagram showing a configuration of the first branching device 41. The first branching device 41 includes first to third connection terminals 41a, 41b, and 41c, an A / D conversion unit 41d, and an amplifier 41e, and relays the video data transmitted from the first imaging device 1 to the in-vehicle video relay. Distributed to the receiver 50 and the first video processing device 21 for transmission.

  The first connection terminal 41a is a terminal for connecting the first imaging device 1 and the first branching device 41 via an analog cable. A second connection terminal 41b and an amplifier 41e are connected to the first connection terminal 41a via an A / D converter 41d.

  The A / D conversion unit 41d AD-converts analog video data transmitted from the first imaging device 1 into digital video data. For example, the A / D converter 41d outputs a digital signal compliant with LVDS (Low-Voltage Differential Signaling). Specifically, a differential signal having an amplitude of several hundred mV is modulated and transmitted. The first video processing device 21 is connected to the second connection terminal 41b via a digital cable, for example, a twisted pair cable compatible with LVDS, and the A / D conversion unit 41d is AD-converted digital video data. Is transmitted to the in-vehicle video repeater 50 through the second connection terminal 41b and the cable.

  The amplifier 41e amplifies the digital video data AD-converted by the A / D converter 41d. The amplifier 41e is connected to a third connection terminal 41c to which the first video processing device 21 is connected via a digital cable. The amplifier 41e receives the amplified digital video data from the third connection terminal 41c and the cable. Through the first video processing device 21.

  The second branching device 42 has the same configuration as that of the first branching device 41, AD converts the analog video data transmitted from the fourth imaging device 4 into digital video data, and the AD-converted video data is mounted on the vehicle. It is configured to transmit to the video repeater 50 and the third video processing device 23.

  FIG. 4 is a block diagram illustrating a configuration of the in-vehicle video repeater 50. The in-vehicle video repeater 50 includes a switching control unit 50a, a video processing unit 56, first to fifth connection terminals 51a, 52a, 53a, 54a, and 55a, and first to fifth communication units 51b, 52b,. The video data transmitted from the first to fourth imaging devices 1, 2, 3, 4 is selectively or multiplexed and transmitted to the second video processing device 22.

  The switching control unit 50a is, for example, a microcomputer including a CPU, and the CPU includes a ROM, a RAM, an input / output unit, and the like connected via a bus. The ROM is configured by a mask ROM, EEPROM, flash memory, or the like that stores a computer program for control. The RAM is composed of SRAM or DRAM for temporary storage. The CPU controls various operations of the in-vehicle video repeater 50 by developing the computer program in the RAM and executing it.

  The first connection terminal 51 a is a connection unit for connecting the first imaging device 1 and the in-vehicle video repeater 50 via the cable and the first branching device 41. The 1st communication part 51b is connected to the 1st connection terminal 51a, and it is comprised so that the video data transmitted from the 1st imaging device 1 may be input into the 1st communication part 51b through the 1st connection terminal 51a. Yes. Note that the video data input to the first communication unit 51b is digital video data that is AD-converted by the first branching device 41.

  Similarly, the fourth imaging device 4 is connected to the fourth connection terminal 54a via the cable and the second branching device 42, and the video data transmitted from the fourth imaging device 4 passes through the fourth connection terminal 54a. 4 is configured to be input to the communication unit 54b.

  The second imaging device 2 is connected to the second connection terminal 52a via a cable, and analog video data transmitted from the second imaging device 2 is input to the second communication unit 52b through the second connection terminal 52a. It is configured to be.

  Similarly, the third imaging device 3 is connected to the third connection unit via a cable, and digital video data transmitted from the third connection terminal 53a is transmitted to the third communication unit 53b through the third connection terminal 53a. It is configured to be entered.

The first communication unit 51b, the third communication unit 53b, and the fourth communication unit 54b demodulate the input digital video data, and input the demodulated video data to the video processing unit 56.
The second communication unit 52b includes an A / D conversion unit 52c. The A / D converter 52c converts the analog video data input to the second communication unit 52b into digital video data. The second communication unit 52 b demodulates the AD converted digital video data, and inputs the demodulated video data to the video processing unit 56.

  The video processing unit 56 has a resolution conversion function for converting the resolution of the video data transmitted from the first to fourth imaging devices 1, 2, 3 and 4, a thinning processing function for converting the frame rate, and a plurality of video data. It has a multiprocessing function for division multiplexing, a switching processing function for selecting any one video data and transmitting it to the first video processing device 21, and the like, and operates according to the control of the switching control unit 50a. The video processing unit 56 gives the selected video data or multiplexed video data to the fifth communication unit 55b.

The fifth communication unit 55 b modulates the video data given from the video processing unit 56. A fifth connection terminal 55a is connected to the fifth communication unit 55b, and the second video processing device 22 is connected to the fifth connection terminal 55a via a cable. The fifth communication unit 55b transmits the video data to the second video processing device 22 via the fifth connection terminal 55a and the cable.
The fifth communication unit 55b is connected to the switching control unit 50a, receives and demodulates the switching signal transmitted from the second video processing device 22, and provides the demodulated switching signal to the switching control unit 50a. It is configured.

  On the other hand, the network part B shown in FIG. 1 includes fifth and sixth imaging devices 5 and 6, third and fourth branching devices 43 and 44, and fourth to sixth video processing devices 24, 25 and 26. Yes. The configuration of the third and fourth branching devices 43 and 44 is the same as that of the first branching device 41.

  The fifth and sixth imaging devices 5 and 6, for example, the stereo visual far-infrared imaging device are connected to the third branching device 43, and one branched cable is connected to the sixth video processing device 26. The other branched cables are connected to the fourth branching device 44. One cable branched by the fourth branching device 44 is connected to the fourth video processing device 24, and the other cable is connected to the fifth video processing device 25.

  The first to sixth video processing devices 21, 22,..., 26 shown in FIG. 1 are microcomputers equipped with a CPU. The CPU is connected to a ROM, a RAM, a timer, and a CAN (Controller Area) via a bus. Network) interface, a video input terminal, and the like, and are configured to receive digital video data and perform predetermined processing on the received digital video data. For example, a pedestrian who may come into contact with the vehicle is detected, and a warning is issued when the pedestrian is detected. Since each video data is added with ID information for identifying which video data of the first to sixth imaging devices 1, 2,... The six video processing devices 21, 22,..., 26 can selectively receive necessary video data based on the ID information.

  On the other hand, as shown in FIG. 1, the other imaging devices 7 and 8 are cable-connected to the video processing device 27, and the imaging devices 9 and 10 are connected to the video processing device 28. The imaging device 11 is connected to the video processing device 29, and the imaging devices 12 and 13 are connected to the video processing device 30.

FIG. 5 is a block diagram showing a comparison between the in-vehicle video communication system according to the present embodiment and a conventional in-vehicle video communication system.
FIG. 5A shows an in-vehicle video communication system according to the embodiment of the present invention, and FIG. 5B shows a conventional in-vehicle video communication system equivalent to FIG.

Comparing the network portion C equivalent to the network portion A, as shown in FIG. 5B, the second video processing device 122 corresponding to the second video processing device 22 includes the first and second imaging devices 1, 1. 2, an analog connection terminal for connecting the second imaging device 3, a digital connection terminal for connecting the third imaging device 3, and two connection terminals for transfer, and the second video processing device 122 is enlarged. To do. Similarly, the third video processing device 123 corresponding to the third video processing device 23 needs to include a connection terminal for receiving video data and a connection terminal for transfer, which increases the size of the device. Further, since it is necessary to connect the first to third imaging devices 1, 2, 3 and the second video processing device 122 on a one-to-one basis, the wiring of the cable is enlarged. Further, the wiring is complicated.
On the other hand, when the video data is distributed and distributed using the in-vehicle video repeater 50 and the first and second branching units 41 and 42, as shown in FIG. The first to third video processing devices 21, 22, and 23 need only have one digital connection terminal, and each device can be miniaturized. In addition, since the in-vehicle video repeater 50 collects the video data of the first to third imaging devices 3 and selectively distributes the video data, the wiring of the cable is simplified. Furthermore, since the cable is branched by the first and second branching devices 41 and 42, the wiring for transfer and the connection terminal are not required, the wiring is simplified, and each device is miniaturized. Furthermore, since the first and second branching devices 41 and 42 and the in-vehicle video repeater 50 are provided with A / D conversion units 41d and 52c, a video having a digital connection terminal and a connection terminal for receiving analog video data. It is not necessary to prepare a processing device, and the first to fourth video processing devices 24 can be downsized.

Comparing the network part D equivalent to the network part B, as shown in FIG. 5B, the fourth video processing device 124 corresponding to the fourth video processing device 24 is provided with six connection terminals, The fifth and sixth video processing devices 125 and 126 corresponding to the fifth and sixth video processing devices 25 and 26 are each provided with two connection terminals.
On the other hand, when the video data is distributed using the third and fourth branching devices 43 and 44 as shown in FIG. It is possible to simplify and reduce the size of each device. Further, the total cable length can be shortened.

  In addition, the cable and the communication line that connect the imaging device, the on-vehicle video repeater, the branching device, and the video processing device are examples, and other cables, cords, conductors, optical fibers, A power line or the like may be used.

  Further, the numbers of imaging devices and video processing devices are examples, and a plurality of video processing devices may be connected to one imaging device. A plurality of imaging devices may be connected to a single video processing device. Further, two or more imaging devices and video processing devices may be connected to each other.

  Furthermore, although the case where the periphery of a vehicle is imaged with visible light was demonstrated, you may comprise so that it may image with infrared rays, far infrared rays, etc. Moreover, you may comprise so that the inside of a vehicle may be imaged.

  Furthermore, although a device that performs processing such as pedestrian detection has been illustrated as a video processing device, processing that uses video data, such as making various determinations using video data, displaying video, and outputting video to the outside, etc. Any other device may be used as long as it is an executing device.

It is a block diagram which shows the vehicle-mounted video communication system which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the structure of the vehicle-mounted video communication system in the state mounted in the vehicle. It is a block diagram which shows the structure of a 1st branching device. It is a block diagram which shows the structure of a vehicle-mounted video relay device. It is a block diagram which shows a comparison with the vehicle-mounted video communication system which concerns on this Embodiment, and the conventional vehicle-mounted video communication system. It is a block diagram which shows an example of the conventional vehicle-mounted video communication system. It is a block diagram which shows typically an example of the problem in the conventional connection method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 50 Vehicle-mounted video repeater 1 1st imaging device 2 2nd imaging device 3 3rd imaging device 4 4th imaging device 5 5th imaging device 6 6th imaging device 21 1st video processing device 22 2nd video processing device 23 3rd Video processing device 24 Fourth video processing device 25 Fifth video processing device 26 Sixth video processing device 41 First branching device 42 Second branching device 43 Third branching device 44 Fourth branching device 50a Switching control unit 51a First connection terminal 52a 2nd connection terminal 53a 3rd connection terminal 54a 4th connection terminal 55a 5th connection terminal 56 Image processing part 41a 1st connection terminal 41b 2nd connection terminal 41c 3rd connection terminal 41d, 52c A / D conversion part

Claims (3)

A plurality of imaging devices that are mounted on a vehicle and that transmit video data obtained by imaging, a video processing device that processes digital video data, and video data transmitted from the plurality of imaging devices are selectively Or an in-vehicle video communication system comprising an in-vehicle video repeater that multiplexes and transmits to the video processing device,
The one or more imaging devices are configured to transmit analog video data,
The in-vehicle video repeater includes a connection unit to which the plurality of imaging devices and the video processing device are connected, an A / D conversion unit that converts analog video data transmitted from the imaging device into digital video data, and An in-vehicle video communication system, characterized in that digital video data is transmitted to the video processing device. An imaging device that is mounted on a vehicle and that transmits analog video data obtained by imaging, a plurality of video processing devices that process digital video data, and a branch that distributes video data transmitted from the imaging device A vehicle-mounted video communication system comprising a device,
The turnout is
Digital video data comprising: a connection unit to which the imaging device and the plurality of video processing devices are connected; and an A / D conversion unit that converts analog video data transmitted from the imaging device into digital video data. Is transmitted to the plurality of video processing devices. A first imaging device and a second imaging device which are mounted on a vehicle and transmit analog video data obtained by imaging; a first video processing device and a second video processing device which process digital video data; A branching device that distributes video data transmitted from the first imaging device, and an on-vehicle vehicle that selectively or multiplexes the video data transmitted from the first and second imaging devices and transmits the data to the second video processing device. An in-vehicle video communication system comprising a video repeater,
The turnout is
A connection unit to which the first imaging device, the first video processing device, and the in-vehicle video repeater are connected, and an A / D conversion unit that converts video data transmitted from the first imaging device into digital video data And transmitting digital video data to the first video processing device and the in-vehicle video repeater,
The in-vehicle video repeater is
A connection unit to which the branching unit, the second imaging device, and the second video processing device are connected; and an A / D conversion unit that converts video data transmitted from the second imaging device into digital video data. An in-vehicle video communication system comprising: digital video data transmitted to the second video processing device.

Images