TWI693834B - Video conferencing system and transmitter thereof - Google Patents

Abstract

A video conferencing system is disclosed. The video conferencing system is coupled between an information processing apparatus and a display apparatus. The video conferencing system includes a transmitter and a receiver. When the transmitter is coupled to the information processing apparatus, the transmitter transmits an extended display identification data (EDID) to the information processing apparatus, so that the information processing apparatus identifies the transmitter as a virtual display apparatus and provides an image signal to the transmitter to wirelessly transmit the image signal. The receiver is coupled to the display apparatus and used to wirelessly receive the image signal transmitted by the transmitter and provide the image signal to the display apparatus.

Description

Video conference system and its transmitting device

The invention relates to a video conference, in particular to a video conference system and its transmitting device.

In recent years, thanks to the rapid development of the Internet and audio-visual processing, multiple users in different places can synchronize the video connection through electronic devices such as computers, smartphones, tablets, etc. During a voice call between the two, they can also see the dynamic images of other users through the screen to enhance the realism and presence of the communication. Therefore, the video conference with both video and audio transmission has gradually replaced the conference call with audio transmission only, and has become a common and efficient communication method within the company or between different companies.

Although the video conferencing system allows all participants to break through the space limitation, the traditional video conferencing system still has many shortcomings and needs to be improved.

For example, when the transmitting device of a traditional video conferencing system is coupled to an information processing device (such as a notebook computer), specific software or drivers still need to be installed, executed, or configured, so the video conferencing system still cannot be truly implemented "Plug and Play" operation. In addition, since the traditional video conference system is not compatible with all operating systems and hardware platforms, when different participants use different operating systems or hardware platforms, they still need the support of the information department to successfully conduct video conferences. Quite inconvenient. In addition, in the traditional video conferencing system, when the user wants to switch between the presentation mode and the video playback mode, complicated software settings need to be completed first, and the actual wireless video playback effect is not ideal.

In view of this, the present invention proposes a video conferencing system and its transmitting device to effectively solve the aforementioned problems encountered in the prior art.

A specific embodiment according to the present invention is a video conference system. In this embodiment, the video conference system is coupled between the information processing device and the display device. The video conference system includes a transmitting device and a receiving device. When the transmitting device is coupled to the information processing device, the transmitting device transmits extended display identification data to the information processing device, so that the information processing device recognizes the transmitting device as a virtual display device according to the extended display identification data and provides an image signal for the transmitting end The device transmits wirelessly. The receiving device is coupled to the display device for wirelessly receiving the image signal transmitted by the transmitting device and providing it to the display device.

In one embodiment, the extended display identification data is stored in the transmitting device, or the extended display identification data is provided by the receiving device to the transmitting device.

In one embodiment, the transmitting device is triggered by the trigger signal to wirelessly transmit the image signal to the receiving device.

In an embodiment, the transmitting device includes: an image receiving unit for receiving image signals having a first format; a first control unit, coupled to the image receiving unit, for converting image signals having a first format into The image signal in the second format; and the first wireless transmission unit is coupled to the first control unit for wirelessly transmitting the image signal in the second format to the receiving device.

In one embodiment, the image receiving unit is a High Definition Multimedia Interface (HDMI) port and the first format is a high resolution multimedia interface format, or the image receiving unit supports Universal Serial Bus (Universal Serial Bus) Bus, USB) Type-C Alternate Mode (Alternate Mode) connection cable receives the video signal and power signal in the first format, and the first format is the DisplayPort format.

In an embodiment, the receiving device includes: a second wireless transmission unit for wirelessly receiving image signals having a second format; a second control unit, coupled to the second wireless transmission unit, for converting the second format The image signal is converted back to the image signal having the first format; and the image output unit is respectively coupled to the second control unit and the display device, and is used to output the image signal having the first format to the display device.

In one embodiment, when the transmitting-end device transmits the extended display identification data to the information processing device, the information processing device performs standard exchange with the extended display identification data through the video interface of its display card.

In one embodiment, the receiving device receives a Human Interface Device (HID) command sent by a display device or a peripheral input device via a cable supporting the universal serial bus Type-C alternative mode, and wirelessly transmits The machine interface device commands to the transmitting device. The transmitting device transmits the man-machine interface device commands to the information processing device through the connection line supporting the universal serial bus Type-C alternative mode.

In an embodiment, the image signal output by the information processing device to the transmitting device has a first resolution, and the transmitting device wirelessly transmits the image signal having the first resolution to the receiving device, and the receiving device receives the image received by the device After the resolution of the signal is adjusted from the first resolution to the second resolution specified by the receiving device, the image signal with the second resolution is output to the display device.

Another embodiment according to the present invention is a transmitting device. In this embodiment, the transmitting device is used in the video conference system. The video conference system also includes a receiver device. The transmitting device includes an image receiving unit, a first control unit, and a first wireless transmission unit. When the transmitting device is coupled to the information processing device, the transmitting device transmits extended display identification data to the information processing device, so that the information processing device treats the transmitting device as a virtual display device and provides an image signal with a first format to the image receiving device unit. The first control unit is coupled to the image receiving unit, and is used to convert the image signal having the first format into the image signal having the second format. The first wireless transmission unit is coupled to the first control unit for wirelessly transmitting the image signal having the second format to the receiving device, and the receiving device provides the display device.

Compared with the prior art, the video conferencing system and its transmitting device of the present invention can effectively improve many shortcomings of the prior art to provide the best wireless video conferencing effect. The advantages and functions are as follows:

When the transmitting device of the video conferencing system of the present invention is coupled to the information processing device, the transmitting device will only send extended display identification data (EDID) to the information processing device, so that the information processing device recognizes the transmitting device as a virtual display device Only the video signal is transmitted to the transmitting device. Since neither the transmitting device nor the information processing device needs to install, execute or configure any software or driver, it can realize a truly "plug and play" operation.

The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings.

A specific embodiment according to the present invention is a video conference system. Please refer to FIG. 1, which is a functional block diagram of the video conference system 1 in this embodiment.

As shown in FIG. 1, the video conference system 1 is coupled between the information processing device PC and the display device DP. The video conference system 1 includes a transmitting device TX and a receiving device RX. The transmitting device TX is coupled to the information processing device PC. The receiving device RX is coupled to the display device DP.

When the transmitting device TX is coupled to the information processing device PC, the transmitting device TX will send the extended display identification data EDID to the information processing device PC, so that the information processing device PC will send the extended display identification data EDID according to the transmission device TX The transmitting device TX is recognized as a virtual display device.

In practical applications, the extended display identification data EDID can be stored in the transmitter device TX, or the receiver device RX can obtain the display identification data EDID of the display device DP and provide the display identification data EDID to the transmitter device TX, but not Limited. When the transmitting-end device TX transmits the extended display identification data EDID to the information processing device PC, the information processing device PC can perform standard exchange with the extended display identification data EDID through the video interface of its display card, but not limited to this.

When the information processing device PC recognizes the transmitting device TX as a virtual display device, the information processing device PC provides an image signal IMG to the transmitting device TX, and wirelessly outputs the image signal IMG through the transmitting device TX. When the receiving device RX wirelessly receives the image signal IMG transmitted by the transmitting device TX, the receiving device RX provides the image signal IMG to the display device DP for display or projection by the display device DP.

In practical applications, if the image signal IMG output from the information processing device PC to the transmitting device TX has a first resolution (eg 1080p), and the image signal output from the receiving device RX to the display device DP has a second resolution (eg 720p). When the transmitting device TX receives the image signal IMG with the first resolution (eg 1080p) from the information processing device PC, the transmitting device TX wirelessly outputs the image signal IMG with the first resolution (eg 1080p) to the receiving end Device RX. When the receiving device RX receives the image signal IMG with the first resolution (for example, 1080p) from the transmitting device TX, the receiving device RX performs the scaling of the image signal IMG, for example, the image signal IMG The resolution is adjusted from the first resolution (eg 1080p) to the second resolution (eg 720p) specified by the receiving device RX, and then the receiving device RX outputs the image signal IMG with the second resolution (eg 720p) to Display device DP. It is added that the second resolution may be greater than the first resolution, for example, the second resolution (eg 4Kp) may be greater than the first resolution (eg 1080p). It should be noted that in this embodiment, the receiving device RX performs the scaling of the image signal IMG, but it is not limited to this.

Please refer to FIG. 2, which is a functional block diagram of the transmitting device TX in FIG. 1. As shown in FIG. 2, the transmitting device TX includes an image receiving unit 20, a first control unit 22 and a first wireless transmission unit 24. The image receiving unit 20 is used to receive the image signal IMG_T1 having the first format. The first control unit 22 is coupled to the image receiving unit 20 for converting the image signal IMG_T1 having the first format into the image signal IMG_T2 having the second format. The first wireless transmission unit 24 is coupled to the first control unit 22 for wirelessly transmitting the image signal IMG_T2 having the second format to the receiving device RX.

In an embodiment, the image receiving unit 20 may be a high definition multimedia interface (High Definition Multimedia Interface, HDMI) port and the first format of the image signal IMG_T1 is a high resolution multimedia interface format.

In another embodiment, the image receiving unit 20 can receive the image signal IMG_T1 through a connection line supporting a universal serial bus (USB) Type-C alternate mode (Alternate mode) and the first format of the image signal IMG_T1 is a display port ( DisplayPort) format, and supports universal serial bus Type-C alternative mode cable can also receive power signals at the same time.

In one embodiment, the second format is an Internet Protocol (IP) packet to facilitate wireless transmission.

Please refer to FIG. 3, which is a functional block diagram of the receiving device RX in FIG. 1. As shown in FIG. 3, the receiving device RX includes a second wireless transmission unit 30, a second control unit 32 and an image output unit 34. The second wireless transmission unit 30 is used to wirelessly receive the image signal IMG_T2 having the second format. The second control unit 32 is coupled to the second wireless transmission unit 30 for converting the image signal IMG_T2 having the second format back to the image signal IMG_T1 having the first format. The image output unit 34 is respectively coupled to the second control unit 32 and the display device DP, and is used to output the image signal IMG_T1 having the first format to the display device DP for display or projection by the display device DP.

Please refer to FIG. 4, which is a schematic diagram illustrating the appearance of the receiving device RX in a preferred embodiment of the present invention. As shown in FIG. 4, the receiving device RX in the video conference system 1 of the present invention may further include a housing CAR, a button BUR, and an antenna AN. Among them, the button BUR provided on the housing CAR is a switch button with a light-emitting diode indicator light, which is used for the user to turn on or off the receiving end device RX; the antennas AN installed on both sides of the housing CAR , Used to transmit wireless signals and communicate with the transmitting device TX.

Please refer to FIG. 5, which is a schematic diagram illustrating the appearance of the transmission device TX in a preferred embodiment of the present invention. As shown in FIG. 5, the transmitter device TX in the video conference system 1 of the present invention may further include a casing CAT, a button BUT, a mode switching key MOD, a USB cable supporting a universal serial bus, and a high-resolution multimedia interface. HDMI cable.

Among them, when the user presses the button BUT provided on the casing CAT, the transmitting end device TX is triggered by the trigger signal to start or stop wirelessly transmitting the image signal to the receiving end device RX; the mode switching key provided on the side of the casing CAR MOD is used by the user to switch between different operating modes, such as the pairing mode, the projection mode, or the audio and video playback mode of the transmitter device TX and the receiver device RX; the USB cable that supports the universal serial bus is used to couple to the information processing The universal serial bus port of the device PC, and the universal serial bus format it supports can be USB 2.0 or USB 3.0, but not limited to this; the HDMI cable that supports the high-resolution multimedia interface is used to couple to the information The high-resolution multimedia interface port of the processing device PC, and the high-resolution multimedia interface format it supports may be HDMI 1.4 or HDMI 2.0, but not limited thereto.

Please refer to FIG. 6, which is a schematic diagram illustrating the appearance of the transmitting device TX in another preferred embodiment of the present invention. As shown in FIG. 6, the transmitter device TX in the video conference system 1 of the present invention may further include a casing CAT, a button BUT, a mode key MOD, and a connection line supporting a universal serial bus Type-C alternate mode (Alternate mode) TYC.

Among them, the button BUT provided on the casing CAT is used for the user to press to start or stop the wireless transmission of the image signal to the receiving device RX; the mode key MOD provided on the side of the casing CAR is used for the user to press and switch Different operation modes, such as the pairing mode, the projection mode or the video playback mode of the transmitter device TX and the receiver device RX; the connection line TYC supporting the universal serial bus Type-C alternative mode for coupling to the general purpose of the information processing device PC Serial bus Type-C port, which can be used to transmit different signals such as data signals, audio and video signals and power signals, and the general serial bus Type-C formats it supports can be Type-C 2.0, Type-C 3.0, Type -C 3.1 (Gen1) or Type-C 3.1 (Gen2), but not limited to this.

Please refer to FIG. 7, which is a schematic diagram illustrating an application scenario of the video conference system 1 of the present invention. As shown in FIG. 7, the transmitting device TX in the video conference system 1 of the present invention is coupled to an information processing device PC (such as a notebook computer, but not limited to this) and the receiving in the video conference system 1 of the present invention The end device RX is coupled to the display device DP (such as a projector, but not limited to this).

When the transmitting device TX is coupled to the information processing device RX, the transmitting device TX will send the extended display identification data EDID to the information processing device PC, so that the information processing device PC will send the extended display identification data EDID according to the transmitted device TX The transmitting device TX is recognized as a virtual display device, and transmits an image signal to the transmitting device TX.

When the transmitting device TX receives the image signal, the transmitting device TX wirelessly outputs the image signal to the receiving device RX. When the receiving device RX wirelessly receives the image signal, the receiving device RX provides the image signal to the display device DP, and the display device DP projects the image signal onto the display screen MT.

Please refer to FIG. 8 and FIG. 9. When the transmitter device TX in the video conference system 1 of the present invention is not coupled to the information processing device PC, the device manager screen (as shown in FIG. 8) and the display setting screen (as shown in FIG. 9) displayed by the information processing device PC Only one display (or monitor) will be displayed in (shown).

That is to say, when the information processing device PC has not been coupled with the transmitting end device TX in the video conference system 1 of the present invention, the information processing device PC will only recognize the extended display according to its own display (or monitor). The data recognizes it as a display (or monitor), so only one device will be displayed on the device manager screen (shown in Figure 8) and display setting screen (shown in Figure 9) displayed on the information processing device PC Display (or monitor).

Next, please refer to FIGS. 10 and 11. When the transmitter device TX in the video conference system 1 of the present invention has been coupled to the information processing device PC, the device manager screen (as shown in FIG. 10) and the display setting screen (as shown in FIG. 11) displayed by the information processing device PC Both displays (two) (or monitors) will be shown in (shown).

That is to say, when the information processing device PC has been coupled with the transmitting end device TX in the video conference system 1 of the present invention, the information processing device PC will not only detect its own display (or monitor), but also According to the extended display identification data EDID transmitted by the transmitting device TX, the transmitting device TX is recognized as another display (or monitor), so the device manager screen displayed on the information processing device PC (as shown in FIG. 10) And the display setting screen (as shown in Fig. 11) will change from the original display of only one display (or monitor) to the display of two displays (or monitors).

Next, please refer to FIG. 12, which illustrates that the receiving device RX in the video conference system 1 of the present invention is coupled and displayed through a HDMI cable supporting a high-resolution multimedia interface and a USB cable supporting a universal serial bus. Schematic diagram of device DP.

As shown in FIG. 12, the transmitter device TX in the video conference system 1 of the present invention can be coupled to the notebook computer NB via a cable HDMI supporting a high-resolution multimedia interface and a USB cable supporting a universal serial bus; The receiver device RX in the video conference system 1 of the invention can be coupled to the display device DP via a cable HDMI supporting a high-resolution multimedia interface and a USB cable supporting a universal serial bus, respectively.

When the notebook computer NB recognizes the transmitter device TX as a virtual display device based on the extended display identification data EDID sent by the transmitter device TX, the transmitter device TX can receive the laptop computer through the HDMI cable that supports a high-resolution multimedia interface The image signal transmitted by the NB, and wirelessly transmits the image signal to the receiving device RX in the form of a wireless signal (for example, Wi-Fi signal WiFi). Then, the receiving device RX transmits the image signal to the display device DP through the HDMI cable that supports the high-resolution multimedia interface for display or projection of the display device DP.

It should be noted that if the display device DP is a touch display, when the display device DP is touched, the receiving device RX can receive the touch commands transmitted by the display device DP through the USB cable that supports the universal serial bus, and Wirelessly transmit touch commands to the transmitting device TX in the form of wireless signals (such as Wi-Fi signal WiFi). When the transmitting device TX wirelessly receives the touch command, the transmitting device TX can transmit the terminal device command to the notebook computer NB through the USB cable supporting the universal serial bus, so that the notebook computer NB can follow the terminal interface The device instruction executes the corresponding function.

In practical applications, the receiving device RX can receive the touch position information transmitted by the display device DP through the cable supporting the universal serial bus Type-C alternative mode and the transmitting device TX can also support the universal serial bus Type-C The connection line of the C alternative mode transmits the commands of the human interface device to the notebook computer NB, but not limited to this.

Please also refer to FIG. 13, which illustrates that the receiver device RX in the video conference system 1 of the present invention is coupled to the display device DP through a HDMI cable that supports a high-resolution multimedia interface and a cable that supports a universal serial bus. A schematic diagram of the USB coupled to the peripheral input device INP.

As shown in FIG. 13, the transmitter device TX in the video conference system 1 of the present invention can be coupled to the notebook computer NB through a cable HDMI supporting a high-resolution multimedia interface and a USB cable supporting a universal serial bus; The receiver device RX in the invented video conference system 1 can be coupled to the display device DP through the HDMI cable that supports a high-resolution multimedia interface and the peripheral input device INP (such as a keyboard or keyboard) through a USB cable that supports a universal serial bus. Mouse, but not limited to this).

When the notebook computer NB recognizes the transmitter device TX as a virtual display device based on the extended display identification data EDID sent by the transmitter device TX, the transmitter device TX can receive the laptop computer through the HDMI cable that supports a high-resolution multimedia interface The image signal transmitted by the NB, and wirelessly transmits the image signal to the receiving device RX in the form of a wireless signal (for example, Wi-Fi signal WiFi). Then, the receiving device RX transmits the image signal to the display device DP through the HDMI cable that supports the high-resolution multimedia interface for display or projection of the display device DP.

It should be noted that, because the receiving device RX is coupled to the peripheral input device INP (such as a keyboard or a mouse, but not limited to this) through the USB cable that supports the universal serial bus, therefore, when the peripheral input device INP is used When the operator is operating, the receiving device RX can receive the man-machine interface device commands sent by the peripheral input device INP through the USB cable supporting the universal serial bus and wirelessly transmit it to the transmitting device TX; when the transmitting device TX wirelessly receives When a terminal device command is received, the transmitting device TX can transmit the terminal device command to the notebook computer NB through the USB cable that supports the universal serial bus, so that the notebook computer NB can execute the corresponding command according to the terminal device command. Function.

In practical applications, the receiving device RX can receive the human-machine interface device commands sent by the peripheral input device INP through the cable supporting the universal serial bus Type-C alternative mode and the transmitting device TX can support the universal serial bus Type -C alternative mode of connection line to send commands to terminal NB, but not limited to this.

Compared with the prior art, the video conference system and its transmitting device of the present invention can effectively improve many of the shortcomings of the prior art and provide the best wireless video conference effect. The advantages and functions are as follows:

(1) When the transmitting device of the video conferencing system of the present invention is coupled to the information processing device, the transmitting device will only send extended display identification data (EDID) to the information processing device, so that the information processing device recognizes the transmitting device as The virtual display device only transmits image signals to the transmitting device. Since neither the transmitting device nor the information processing device needs to install, execute, or configure any software or drivers, it can achieve a truly "plug and play" operation;

(2) As long as the electronic device to which the video conferencing system of the present invention is coupled can have a standard high-resolution multimedia interface (HDMI) input, the video conferencing system of the present invention can be compatible with all operating systems and hardware platforms , So that the presenter can use the content from various devices and media equipment to freely conduct presentations through any information processing device, without the support of the information department can successfully conduct video conferences;

(3) In the video conference system of the present invention, when the presenter wants to switch between the presentation mode and the audio-visual playback mode, he only needs to press a specific button on the transmitting device to achieve high image quality and stereo sound The wireless audio and video playback is quite convenient;

(4) The video conferencing system of the present invention can also provide an extended desktop mode, so that the presenter can use the extended desktop to perform other tasks, such as reading notes, writing records, backing up data, or monitoring applications, while conducting presentations through the information processing device Programs, etc.; and

(5) When the transmitting device of the video conferencing system of the present invention is coupled to the information processing device, the transmitting device using the extended display identification data (EDID) will automatically adjust the resolution setting of the information processing device to meet the requirements of the display device The resolution setting enables the presenter to concentrate on the presentation without adjusting the resolution setting of the information processing device.

With the above detailed description of the preferred embodiments, it is hoped that the features and spirit of the present invention can be described more clearly, rather than limiting the scope of the present invention with the preferred embodiments disclosed above. On the contrary, the purpose is to cover various changes and equivalent arrangements within the scope of the patent application of the present invention.

1: Video conference system TX: Transmitting device RX: Receiver device PC: Information processing device DP: display device EDID: Extended display identification data IMG: video signal 20: Image receiving unit 22: The first control unit 24: The first wireless transmission unit 30: Second wireless transmission unit 32: Second control unit 34: Image output unit IMG_T1: video signal with the first format IMG_T2: video signal with second format AN: Antenna CAR: shell BUR: button CAT: shell BUT: button MOD: Mode switching key HDMI: support cable for high-resolution multimedia interface USB: support universal serial bus cable TYC: Supports universal serial bus Type-C alternative mode cable MT: display screen NB: laptop WiFi: Wi-Fi signal INP: peripheral input device

The drawings of the present invention are described as follows: FIG. 1 is a functional block diagram of a video conference system 1 in a preferred embodiment of the present invention. FIG. 2 is a functional block diagram of the transmitting device TX in FIG. 1. FIG. 3 is a functional block diagram of the receiving device RX in FIG. 1. FIG. 4 is a schematic diagram showing the appearance of the receiving device RX in a preferred embodiment of the present invention. FIG. 5 is a schematic diagram showing the appearance of the transmitter device TX in a preferred embodiment of the present invention. FIG. 6 is a schematic diagram showing the appearance of the transmitting device TX in another preferred embodiment of the present invention. 7 is a schematic diagram showing an application scenario of the video conference system 1 of the present invention. 8 is a schematic diagram showing that only one monitor is displayed on the device manager screen of the information processing device PC when the transmitting device TX is not coupled to the information processing device PC. 9 is a schematic diagram showing that only one display is displayed on the display setting screen of the information processing device PC when the transmitting device TX is not coupled to the information processing device PC. 10 is a schematic diagram showing two monitors displayed on the device manager screen of the information processing device PC when the transmitting device TX has been coupled to the information processing device PC. FIG. 11 is a schematic diagram showing that two displays are displayed on the display setting screen of the information processing device PC when the transmitting device TX is coupled to the information processing device PC. FIG. 12 is a schematic diagram illustrating that the receiving device RX is coupled to the display device DP through a cable HDMI supporting a high-resolution multimedia interface and a USB cable supporting a universal serial bus. FIG. 13 is a schematic diagram showing that the receiving device RX is coupled to the display device DP through the HDMI cable supporting the high-resolution multimedia interface and the peripheral input device INP through the USB cable supporting the universal serial bus.

1: Video conference system

TX: Transmitting device

RX: Receiver device

PC: Information processing device

DP: display device

EDID: Extended display identification data

IMG: video signal

Claims (17)

A video conference system is coupled between an information processing device and a display device. The video conference system includes: A transmitting device, when the transmitting device is coupled to the information processing device, the transmitting device transmits an extended display identification data to the information processing device, causing the information processing device to send the transmitting end according to the extended display identification data The device is recognized as a virtual display device and provides an image signal for wireless transmission by the transmitting device; and A receiving device is coupled to the display device for wirelessly receiving the image signal transmitted by the transmitting device and providing it to the display device. The video conference system as described in item 1 of the patent application scope, wherein the extended display identification data is stored in the transmitting device, or the extended display identification data is provided by the receiving device to the transmitting device. The video conference system as described in item 1 of the patent application scope, wherein the transmitting device is triggered by a trigger signal to wirelessly transmit the image signal to the receiving device. The video conference system as described in item 1 of the patent application scope, wherein the transmitting device includes: An image receiving unit for receiving the image signal having a first format; A first control unit, coupled to the image receiving unit, for converting the image signal having the first format into the image signal having a second format; and A first wireless transmission unit, coupled to the first control unit, is used to wirelessly transmit the image signal with the second format to the receiving device. The video conference system as described in item 4 of the patent application scope, wherein the image receiving unit is a High Definition Multimedia Interface (HDMI) port and the first format is a high resolution multimedia interface format, or The image receiving unit receives the image signal and a power signal with the first format through a connection line supporting a Universal Serial Bus (USB) Type-C Alternate Mode (Alternate Mode), and the first format is DisplayPort (DisplayPort) format. The video conference system as described in item 4 of the patent application scope, wherein the receiving device includes: A second wireless transmission unit for wirelessly receiving the image signal having the second format; A second control unit, coupled to the second wireless transmission unit, for converting the image signal having the second format back to the image signal having the first format; and An image output unit, respectively coupled to the second control unit and the display device, is used to output the image signal with the first format to the display device. The video conference system as described in item 1 of the patent application scope, wherein when the transmitting device transmits the extended display identification data to the information processing device, the information processing device uses the video interface of its display card and the extended display identification data Perform a standard exchange. The video conference system as described in item 1 of the patent application scope, wherein the receiving device receives a human interface device transmitted by the display device or a peripheral input device through a connection line supporting a universal serial bus Type-C alternative mode ( Human Interface Device, HID) command, and wirelessly transmit the human interface device command to the transmitting device, the transmitting device transmits the human interface device command to the device through a cable supporting the universal serial bus Type-C alternative mode Information processing device. The video conference system as described in item 1 of the patent application scope, wherein the image signal output by the information processing device to the transmitting device has a first resolution, and the transmitting device wirelessly transmits the video signal having the first resolution The image signal is sent to the receiving device, and the receiving device adjusts the resolution of the received image signal from the first resolution to a second resolution specified by the receiving device, and outputs the second resolution The image signal of the degree to the display device. A transmitting device is used in a video conference system. The video conference system further includes a receiving device. The transmitting device includes: An image receiving unit, when the transmitting device is coupled to an information processing device, the transmitting device transmits an extended display identification data to the information processing device, so that the information processing device treats the transmitting device as a virtual display The device also provides an image signal with a first format to the image receiving unit; A first control unit, coupled to the image receiving unit, for converting the image signal having the first format into the image signal having a second format; and A first wireless transmission unit, coupled to the first control unit, is used to wirelessly transmit the image signal having the second format to the receiving device, and the receiving device provides the display device. The transmitting device as described in item 10 of the patent application scope, wherein the extended display identification data is stored in the transmitting device, or the extended display identification data is provided by the receiving device to the transmitting device. The transmitter device as described in item 10 of the patent application scope, wherein the transmitter device is triggered by a trigger signal to wirelessly transmit the image signal having the second format to the receiver device. The transmitter device as described in item 10 of the patent scope, wherein the image receiving unit is a high-resolution multimedia interface (HDMI) port and the first format is a high-resolution multimedia interface format, or the image receiving unit The cable supporting the universal serial bus Type-C alternative mode receives the image signal and the power signal in the first format, and the first format is a display port format. The transmitting device as described in item 10 of the patent application scope, wherein the receiving device includes: A second wireless transmission unit for wirelessly receiving the image signal having the second format; A second control unit, coupled to the second wireless transmission unit, for converting the image signal having the second format back to the image signal having the first format; and An image output unit, respectively coupled to the second control unit and the display device, is used to output the image signal with the first format to the display device. The transmitting device as described in item 10 of the patent application scope, wherein when the transmitting device transmits the extended display identification data to the information processing device, the information processing device uses the video interface of its display card and the extended display identification data Perform a standard exchange. The transmitter device as described in item 10 of the patent application scope, wherein the receiver device receives a human interface device command sent by the display device or a peripheral input device through a cable supporting the universal serial bus Type-C alternative mode , And wirelessly send the man-machine interface device commands to the transmitter device, and the transmitter device sends the man-machine interface device commands to the information processing device through a cable supporting the universal serial bus Type-C alternative mode. The transmitting device as described in item 10 of the patent application range, wherein the image signal output by the information processing device to the image receiving unit of the transmitting device has a first resolution, and the first wireless signal of the transmitting device The transmission unit wirelessly transmits the image signal having the first resolution to the receiving device, and the receiving device adjusts the resolution of the image signal it receives from the first resolution to one specified by the receiving device After the second resolution, the image signal with the second resolution is output to the display device.

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