Wireless multi-channel bidirectional video processing device

Abstract

The invention provides a wireless multi-channel bidirectional video processing device which is used for being connected with at least one wireless device and a host device, and comprises a wireless communication unit which is used for being wirelessly connected with the at least one wireless device so as to receive videos from the at least one wireless device; the image processing unit is used for transmitting a connection request signal to the at least one wireless device through the wireless communication unit, so that the at least one wireless device returns a connection permission signal and a video according to the connection request signal and processes the video to form a plurality of output videos, and the processing comprises a video display mode and a video display mode. The image processing unit processes the video according to the selected video display mode, and the wireless multi-channel bidirectional video processing device provides a plurality of endpoints for the host device according to the number of the output videos so as to transmit the output videos to the host device.

Description

Technical Field

[0001] The invention relates to a wireless multi-channel bidirectional video processing device, in particular to a wireless multi-channel bidirectional video processing device for bidirectional transmission of information. Background Art

[0002] In video conferencing, using wireless connections allows users to set up and adjust the position of the camera more conveniently and freely.

[0003] However, in a video conference, it is usually necessary to simultaneously display videos from multiple cameras or to simply process the videos from the cameras for the purpose of conducting the conference.

[0004] Therefore, a method is needed to efficiently process videos from multiple photographing devices simultaneously so as to clearly display the videos from each photographing device simultaneously.

[0005] In addition, after using a computer to receive videos from multiple cameras, there is often a need to display the images on a large screen or TV. Using a wireless connection allows users to more conveniently and freely set up and adjust the position of the computer.

[0006] Therefore, there is a need to provide a wireless multi-channel two-way video processing device having the function of wirelessly transmitting videos from multiple photographic devices and wirelessly transmitting computer-processed images to a wireless device (for example, a wireless device with a large screen or a wireless device connected to a large screen). Summary of the invention

[0007] In order to effectively solve the above-mentioned problems, the present invention proposes a wireless multi-channel two-way video processing device, which is used to connect with multiple wireless devices and a host device. The wireless multi-channel two-way video processing device includes: a wireless communication unit, which is used to wirelessly connect with the wireless devices to receive at least one video from the wireless devices; an image processing unit, which transmits a connection request signal to the wireless devices through the wireless communication unit, so that the wireless devices return a connection permission signal and the at least one video according to the connection request signal, and processes the at least one video to become multiple output videos; and a mode control unit, which receives the video from the host device according to the mode control signal received from the host device. At least one display video received by the device transmits a format request signal to the wireless devices through the wireless communication unit, so that the wireless devices return a format response signal according to the format request signal, and adjust the at least one display video according to the format response signal to become at least one display information, and transmit the at least one display information to the wireless devices through the wireless communication unit, wherein the wireless multi-channel bidirectional video processing device provides a plurality of endpoints for the host device according to the number of the output videos and the at least one display video, so as to transmit the output videos to the host device and receive the at least one display video from the host device.

[0008] Preferably, the host device generates the at least one display video through the output videos.

[0009] Preferably, the wireless communication unit and the wireless devices are wirelessly connected using a WiFi protocol.

[0010] Preferably, the image processing unit includes a video processor, a neural network processor, a memory, and a storage unit, and wherein the video processor and the neural network processor use a program stored in the storage unit to perform the processing, and the memory is used to store the at least one video and the output videos.

[0011] Preferably, the wireless multi-channel bidirectional video processing device further includes: a USB control unit, receiving the output videos to report an endpoint information to the host device according to the output videos, and receiving the at least one display video to provide the host device with the endpoints according to the number of the output videos and the at least one display video; and a connection port unit, receiving the output videos from the USB control unit to transmit the output videos to the host device, and receiving the at least one display video from the host device to transmit the at least one display video to the USB control unit.

[0012] Preferably, the mode control unit includes: a video conversion unit for adjusting the at least one display video according to the format response signal, wherein the mode control unit receives the at least one display video from the USB control unit, and wherein the adjustment includes adjusting the format of the at least one display video and compressing the at least one display video after the adjusted format into the at least one display information to facilitate wireless transmission.

[0013] Preferably, the processing of the at least one video includes at least one video display mode, and the image processing unit processes the at least one video according to the selected video display mode, and wherein the video display mode includes picture-in-picture, side-by-side, cropped, overlapped, zoomed in and out, and original picture.

[0014] Preferably, the processing further includes a format processing to convert the format of the at least one received video into a format that complies with the USB video level, so that the connection port unit can transmit the output videos.

[0015] Preferably, the processing further includes a resolution processing to convert the resolution of the at least one received video into a resolution that matches the resolution of the host device.

[0016] Preferably, before the mode control unit adjusts the at least one display video, the image processing unit processes the at least one display video.

[0017] Preferably, the processing of the at least one display video includes the video display mode, and the image processing unit processes the at least one display video according to the selected video display mode.

[0018] In order to make those skilled in the art understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific embodiments and the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of an existing wireless video transmission device;

[0020] Figure 2 A schematic diagram of a wireless multi-channel bidirectional video processing device according to the present invention;

[0021] Figure 3 A block diagram of a wireless multi-channel bidirectional video processing device according to an embodiment of the present invention;

[0022] Figure 4 A block diagram of a wireless multi-channel bidirectional video processing device transmitting a signal from a wireless device to a host device according to an embodiment of the present invention; and

[0023] Figure 5A block diagram of a wireless multi-channel bidirectional video processing device transmitting a signal from a host device to a wireless device according to an embodiment of the present invention.

[0024] Description of Figure Numbers

[0025] 10: Wireless video transmission device

[0026] 11,11a-11e: Wireless Devices

[0027] 12: Host device

[0028] 13,14b: Display device

[0029] 14a: Photographic Installation

[0030] 100: Wireless multi-channel two-way video processing device

[0031] 102: Wireless communication unit

[0032] 104: Image processing unit

[0033] 106:USB control unit

[0034] 108: Connection port unit

[0035] 110: Mode control unit

[0036] 1042: Video processor

[0037] 1044: Memory

[0038] 1046: Storage unit

[0039] 1048: Neural Network Processor

[0040] 1102: Video conversion unit

[0041] D,D1-D4: Video

[0042] D': Output video

[0043] DI1, DI2: Display information

[0044] DV: Display Video

[0045] EP: Endpoint Information

[0046] FA: Format reply signal

[0047] FR: Format request signal

[0048] SA: Connection permission signal

[0049] SR: Connection request signal DETAILED DESCRIPTION

[0050] Please refer to Figure 1 , Figure 1 Schematic diagram of an existing wireless video transmission device. The existing audio and video transmission system includes a wireless video transmission device 10, a wireless device 11, a host device 12, and a display device 13. The wireless device 11 is a wireless device used to return a connection permission signal SA and a video D according to a connection request signal SR transmitted by the wireless video transmission device 10. In addition to the wireless device 11, the source of the video D can also be other sources on the network, such as a video player, etc., depending on actual needs. In other words, the wireless device 11 can be a network camera device or a camera device with a wireless communication unit. If the camera device is a network camera device, the wireless video transmission device 10 is connected to the Internet via a wireless communication unit and then connected to it, which is different from Figure 1 The wireless device 11 with a wireless communication unit can be directly connected via wifi.

[0051] Please refer to Figure 2 , Figure 2 Schematic diagram of a wireless multi-channel two-way video processing device 100 according to the present invention. The wireless multi-channel two-way video processing device 100 of the present invention can be wirelessly connected to multiple wireless devices, such as wireless devices 11a to 11e, to receive videos D1 to D4 from wireless devices 11a to 11d in the wireless devices 11a to 11e. It is preferred to use a WiFi protocol for connection, but the present invention is not limited thereto. The wireless device may include any device with a wireless connection function, including but not limited to a panoramic camera, a camera with a PTZ (Pan / Tilt / Zoom) function, a mobile phone, and other devices with a photographic function. In addition, the wireless device 11c itself may not have a photographic function, but may be connected to a processing or transmission device of a photographic device 14a with a photographic function. For example, the wireless device 11c may receive videos transmitted by multiple photographic devices with a photographic function, process the videos (for example, the wireless device 11c), and wirelessly transmit the processed videos to the wireless multi-channel two-way video processing device 100 of the present invention.

[0052] Therefore, it is understandable that the videos D1 to D4 received by the wireless multi-channel two-way video processing device 100 of the present invention may include but are not limited to any processed or unprocessed videos. For example, the processed videos may include videos processed by a wireless device with a video processing function. The processing includes but is not limited to picture-in-picture, picture-by-picture, picture cropping, picture overlap, picture zooming in and out, and the like. In addition, the processed videos may also have various resolutions, specifications, ratios, and the like. In addition, for example, the unprocessed videos may include but are not limited to videos with various resolutions, specifications, and ratios taken by various different photographic devices. It is understandable that the present invention does not limit the number of received videos, and the wireless multi-channel two-way video processing device 100 can wirelessly receive one to multiple videos.

[0053] In addition, the wireless multi-channel two-way video processing device 100 of the present invention has a two-way transmission function, that is, the display information DI1 and DI2 can be transmitted to the wireless device 11c and the wireless device 11e. It can be understood that the wireless multi-channel two-way video processing device 100 can transmit the display information to any device that has a wireless connection function and can directly play the display information, for example, the wireless device 11e, and the wireless device 11e includes but is not limited to smart TVs, smart projectors, mobile phones, tablets, etc. In addition, the wireless multi-channel two-way video processing device 100 can transmit the display information to any device that has a wireless connection function and can indirectly play the display information, for example, the wireless device 11c connected to the display device 14b.

[0054] Figure 3 A block diagram of a wireless multi-channel bidirectional video processing device 100 according to an embodiment of the present invention. Figure 2 , Figure 3In the present embodiment, the wireless multi-channel bidirectional video processing device 100 includes: a wireless communication unit 102, which is used to wirelessly connect to the wireless devices 11a to 11e to receive videos D1 to D4 from the wireless devices 11a to 11d and transmit display information DI1 and DI2 to the wireless devices 11c and 11e; an image processing unit 104, which processes the videos D1 to D4 to become output videos; a USB control unit 106, which receives the output videos and provides a plurality of endpoints for the host device 12 according to the number of output videos and a display video received from the host device 12; a connection port unit 108, which receives the output video from the USB control unit 106 to transmit the output video to the host device 12; and a mode control unit 110, which is used to receive the display video from the host device 12 and convert the display video into display information DI1 and DI2. Specifically, the wireless multi-channel bidirectional video processing device 100 is connected to the host device 12 via the connection port unit 108, and the connection port unit 108 may support USB 2.0, USB 3.0, USB Type-C, a multi-cable connection port, or a customized connection port, but is not limited thereto.

[0055] In addition, the image processing unit 104 includes: a video processor 1042; a memory 1044; a storage unit 1046; and a neural network processor 1048, which uses an artificial intelligence engine to adaptively assist the image processing of the image processing unit 104. The video processor 1042 and the neural network processor 1048 use the program stored in the storage unit 1046 to execute the video display mode, and the memory 1044 is used to store videos D1 to D4 and output videos. Specifically, the memory 1044 and the storage unit 1046 may include any form of memory, including but not limited to RAM. It is understandable that the display video from the host device 12 can be processed by the image processing unit 104 first and then transmitted to the mode control unit 110.

[0056] In addition, the mode control unit 110 includes: a video conversion unit 1102 for converting and compressing the display video.

[0057] Please refer to Figure 4 , Figure 5 , the bidirectional transmission of the present invention will be further described below. It is understandable that the wireless multi-channel bidirectional video processing device 100 of the present invention can be used for bidirectional transmission of signals. One direction of the bidirectional transmission is the direction in which the wireless device 11 transmits signals to the host device 12, and the other direction is the direction in which the host device 12 transmits signals to the wireless device 11.

[0058] Figure 4A block diagram of a wireless multi-channel bidirectional video processing device 100 transmitting a signal from a wireless device 11 to a host device 12 according to an embodiment of the present invention. Figure 4 When the wireless device 11 transmits a signal to the host device 12, the following elements of the wireless multi-channel bidirectional video processing device 100 will perform corresponding functions: a wireless communication unit 102, used to receive the video D from the wireless device 11; an image processing unit 104, which transmits a connection request signal SR to the wireless device 11 through the wireless communication unit 102, so that the wireless device 11 returns a connection permission signal SA and the video D according to the connection request signal SR, and processes the video D to become an output video D'; a USB control unit 106, which receives the output video D', reports the endpoint information EP to the host device 12 according to the output video D', and provides a plurality of endpoints for the host device 12 according to the number of the output videos D'; and a connection port unit 108, which receives the output video D' from the USB control unit 106, so as to transmit the output video D' to the host device 12.

[0059] Specifically, when the wireless multi-channel bidirectional video processing device 100 is coupled to the wireless devices 11a to 11e through the wireless communication unit 102, the wireless multi-channel bidirectional video processing device 100 will transmit a connection request signal SR to the wireless devices 11a to 11e through the wireless communication unit 102, and the wireless devices 11a to 11d among the wireless devices 11a to 11e will identify the wireless multi-channel bidirectional video processing device 100 according to the connection request signal SR to return a connection permission signal SA and video D.

[0060] It is understood that the processing of the image processing unit 104 includes a video display mode, and the image processing unit 104 processes the video D according to the selected video display mode to transmit the output video D' to the host device 12. It is understood that the image processing unit 104 may also not process the video D according to the selected video display mode to directly output the video D as the output video D' to transmit to the host device 12.

[0061] Specifically, the image processing unit 104 processes the videos D1 to D4 according to the selected video display mode. The video display mode includes but is not limited to picture-in-picture, side-by-side, cut-out, overlap, zoom in and out, original picture, etc. It is understandable that when the selected video display mode is the original picture, the image processing unit 104 may not process the video D to directly output the video D as the output video D'. In addition, the video display mode may also include processing the incoming video using a computer vision algorithm through the neural network processor 1048, such as edge detection, image segmentation, and feature extraction. In addition, a person detection algorithm is used to identify and locate the person in the video, such as the face, body shape, or other target of interest of the participant. In addition, a person detection algorithm is used to identify and locate the person in the picture or image. In addition, once the person is identified, the artificial intelligence algorithm can use motion tracking technology to track the movement of the person over time. In addition, the image processing unit 104 can also process the videos D1 to D4 in different video display modes. For example, the video D1 is processed in the first video display mode, and the videos D2-D4 are processed in the second video display mode. However, the present invention is not limited thereto.

[0062] For example, assuming that video D1 is a video captured by a panoramic camera and the captured video includes five people, then according to the selected video display mode, the image processing unit 104 can identify the five people respectively, and output five cropped videos tracking the five people and the original panoramic video. Therefore, the image processing unit 104 will process the video D1 and output six output videos D'. Therefore, according to the selected video display mode, the image processing unit 104 can output multiple output videos D' in a multi-channel (Multi-Stream) manner. Or, for example, according to another selected video display mode, videos D1 to D4 can all be displayed as one video in a side-by-side mode, so the image processing unit 104 will output one output video D'.

[0063] Accordingly, the USB control unit 106 receives at least one output video D', and reports an endpoint information EP to the host device 12 according to the at least one output video D'. For example, assuming that the image processing unit 104 outputs six output videos D', the endpoint information EP reported by the USB control unit 106 is six endpoints, so that the host device 12 is prepared to transmit six video channels, and so on.

[0064] In addition, the processing further includes format processing and resolution processing. When the image processing unit 104 receives the video D and processes the video D to become the output video D', the image processing unit 104 will simultaneously convert the video D into a format that complies with the USB Video Class (UVC) so that the connection port unit 108 can transmit the output video D'. For example, if the format of the video D of the wireless device 11 is a non-UVC format, such as Real Time Streaming Protocol (RTSP) streaming, the image processing unit 104 will perform format processing to convert the format into the UVC format. For example, if the format of the video D of the wireless device 11 is the UVC format, the most common technology is the Motion Joint Photographic Experts Group (MJPEG) format, then the image processing unit 104 does not need to perform format processing. In addition, in other embodiments, the host device 12 and the display device 13 can be an integrated device with a display function, such as a mobile phone, a tablet, a laptop or any portable device.

[0065] Moreover, the processing further includes resolution processing. If the video D outputted by the wireless device 11 to the wireless multi-channel bidirectional video processing device 100 has a first resolution (e.g., 1080p), and the resolution of the host device 12 is set to a second resolution (e.g., 720p), the image processing unit 104 performs resolution processing on the video D, such as scaling, to adjust the outputted output video D' to the second resolution. It should be noted that the second resolution can be greater than the first resolution depending on actual needs, for example, the second resolution is 4Kp, which is greater than the first resolution of 1080p.

[0066] Compared to the prior art, since the UVC driver is a generic driver that is preinstalled in most operating systems, the wireless multi-channel two-way video processing device 100 and the wireless device 11 do not need to install, execute or set a specific driver to receive the connected video on the required host device 12, which can avoid the driver compatibility problem, reduce the difficulty of use and improve convenience. In actual use, users can use content from various devices and media devices to flexibly transmit through any wireless device, and the wireless multi-channel two-way video processing device 100 will automatically adjust the resolution setting through video processing to match the resolution of the host device 12, and set the displayed video format as needed.

[0067] Figure 5A block diagram of a wireless multi-channel bidirectional video processing device 100 transmitting a signal from a host device 12 to a wireless device 11 according to an embodiment of the present invention. Figure 5 When the host device 12 transmits a signal to the wireless device 11, the following elements of the wireless multi-channel bidirectional video processing device 100 will perform corresponding functions: the connection port unit 108 receives the display video DV from the host device 12 to transmit the display video DV to the USB control unit 106; the USB control unit 106 receives the display video DV from the connection port unit 108 to transmit the display video DV to the mode control unit 110, and provides an endpoint for the host device 12 according to the number of output videos D' and the display video DV; the mode control unit 110 transmits the format request signal FR through the wireless communication unit 102 according to the display video DV received by the USB control unit 106 The wireless device 11 is transmitted to the wireless device 11, so that the wireless device 11 returns a format response signal FA according to the format request signal FR, and adjusts the display video DV according to the format response signal FA to become display information DI, and transmits the display information DI to the wireless device 11 through the wireless communication unit 102; and the wireless communication unit 102 is used to receive the format request signal FR from the mode control unit 110, wirelessly transmit the format request signal FR to the wireless device 11, receive the format response signal FA from the wireless device 11, transmit the format response signal FA to the mode control unit 110, receive the display information DI from the mode control unit 110, and transmit the display information DI to the wireless device 11.

[0068] It is understandable that the displayed video DV is any video set by the user. For example, the user uses the following in the host device 12: Figure 4 The received output video D' generates a display video DV.

[0069] Here, the manner in which the USB control unit 106 provides endpoints will be specifically described. The USB control unit 106 provides endpoints for the host device 12 according to the number of output videos D' and display videos DV. For example, when the number of output videos D' received by the USB control unit 106 is N output videos D' (N is any positive integer) and the host device 12 does not output display videos DV, the USB control unit 106 will provide N endpoints for the host device 12 so that the host device 12 can simultaneously receive the N output videos D'. When the USB control unit 106 does not receive the output video D' and the host device 12 outputs M display videos DV (M is any positive integer), the USB control unit 106 will provide M endpoints for the host device 12 so that the host device 12 can simultaneously transmit the M display videos DV. When the number of output videos D′ received by the USB control unit 106 is N and the host device 12 outputs M display videos DV, the USB control unit 106 provides N+M endpoints for the host device 12 so that the host device 12 can simultaneously receive the N output videos D′ and transmit the M display videos DV.

[0070] Specifically, the mode control unit 110 transmits a format request signal FR to the wireless devices 11a to 11e through the wireless communication unit 102 according to the display video DV received by the USB control unit 106, so that the wireless devices 11c and 11e among the wireless devices 11a to 11e return a format response signal FA according to the format request signal FR, and the video conversion unit 1102 in the mode control unit 110 adjusts the display video DV according to the format response signal FA to become the display information DI. Finally, the mode control unit 110 transmits the display information DI to the wireless device 11 through the wireless communication unit 102. The format response signal FA may include but is not limited to the display format information, compression format information, transmission format information, etc. of the display device 14b or the wireless device 11e.

[0071] Accordingly, the adjustment includes adjusting the format of the display video DV to the format of the target display device and compressing the display video DV after the adjustment into the at least one display information DI for wireless transmission.

[0072] It is understandable that in an alternative embodiment of the present invention, the display video from the host device 12 may also be first transmitted from the USB control unit 106 to the image processing unit 104, processed by the image processing unit 104, and finally transmitted to the mode control unit 110. The processing of the at least one display video by the image processing unit 104 includes the video display mode, and the image processing unit processes the at least one display video according to the selected video display mode. For example, the image processing unit 104 adds the temporarily stored cropped video of the person to the at least one display video, and transmits the processed at least one display video to the mode control unit 110, and finally transmits it to the wireless device 11 via the wireless communication unit 102.

[0073] Accordingly, the wireless multi-channel bidirectional video processing device of the present invention has the function of bidirectional signal transmission. Through endpoint setting, it can more conveniently transmit the video from the host device to the wireless device with the function of directly or indirectly playing and displaying information while receiving the video of multiple wireless devices.

[0074] The present invention is not limited to the above-described embodiments, and it is obvious to those skilled in the art that various modifications and variations may be made to the present invention without departing from the spirit or scope of the present invention.

[0075] Thus, it is intended that the present invention covers the modifications and variations of the present invention or that come within the scope of the appended claims and their equivalents.

Claims

1. A wireless multi-channel bidirectional video processing device, used to connect multiple wireless devices and a host device, the wireless multi-channel bidirectional video processing device comprising: a wireless communication unit, configured to establish wireless connection with the plurality of wireless devices to receive at least one video from the plurality of wireless devices; An image processing unit, which transmits a connection request signal to the plurality of wireless devices through the wireless communication unit, so that the plurality of wireless devices return a connection permission signal and the at least one video according to the connection request signal, and processes the at least one video to become a plurality of output videos; as well as a mode control unit, transmitting a format request signal to the plurality of wireless devices through the wireless communication unit according to at least one display video received from the host device, so that the plurality of wireless devices return a format reply signal according to the format request signal, and adjusting the at least one display video according to the format reply signal to become at least one display information, and transmitting the at least one display information to the plurality of wireless devices through the wireless communication unit, The wireless multi-channel bidirectional video processing device provides a plurality of endpoints for the host device according to the number of the plurality of output videos and the at least one display video, so as to transmit the plurality of output videos to the host device and receive the at least one display video from the host device.

2. The wireless multi-channel bidirectional video processing device according to claim 1, wherein: The host device generates the at least one display video through the plurality of output videos.

3. The wireless multi-channel bidirectional video processing device according to claim 1, wherein: The wireless communication unit and the plurality of wireless devices are wirelessly connected using a WiFi protocol.

4. The wireless multi-channel bidirectional video processing device according to claim 1, in, The image processing unit includes a video processor, a neural network processor, a memory, and a storage unit, and The video processor and the neural network processor use a program stored in the storage unit to perform the processing, and the memory is used to store the at least one video and the multiple output videos.

5. The wireless multi-channel bidirectional video processing device according to claim 1, further comprising: A USB control unit receives the plurality of output videos to report endpoint information to the host device according to the plurality of output videos, and receives the at least one display video to provide the plurality of endpoints to the host device according to the number of the plurality of output videos and the at least one display video; as well as The connection port unit receives the multiple output videos from the USB control unit to transmit the multiple output videos to the host device, and receives the at least one display video from the host device to transmit the at least one display video to the USB control unit.

6. The wireless multi-channel bidirectional video processing device according to claim 5, wherein: The mode control unit comprises: a video conversion unit, configured to adjust the at least one display video according to the format reply signal, The mode control unit receives the at least one display video from the USB control unit, and The adjustment includes adjusting the format of the at least one display video and compressing the at least one display video after the adjustment into the at least one display information for wireless transmission.

7. The wireless multi-channel bidirectional video processing device according to claim 1, in, The processing of the at least one video includes at least one video display mode, the image processing unit processes the at least one video according to the selected video display mode, and The video display modes include picture-in-picture, side-by-side, cropped, overlapped, zoomed in and out, and original.

8. The wireless multi-channel bidirectional video processing device according to claim 7, wherein: The processing further includes format processing to convert the format of the received at least one video into a format that complies with USB video level so that the connection port unit can transmit the plurality of output videos.

9. The wireless multi-channel bidirectional video processing device according to claim 7, wherein: The processing further includes resolution processing to convert the resolution of the at least one received video into a resolution that matches the resolution of the host device.

10. The wireless multi-channel bidirectional video processing device according to claim 7, wherein: Before the mode control unit adjusts the at least one display video, the image processing unit processes the at least one display video.

11. The wireless multi-channel bidirectional video processing device according to claim 10, in, The processing of the at least one display video includes the video display mode, and the image processing unit processes the at least one display video according to the selected video display mode.

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