TWI713369B - Video conferencing system and transmitter thereof - Google Patents

Abstract

A video conferencing system is disclosed. The video conferencing system includes a transmitter and a receiver. When the transmitter is coupled to a port of an information processing apparatus, the transmitter communicates with the information processing apparatus to determine whether the port of the information processing apparatus has video output function. When the above determination result is no, the transmitter emits a wireless signal. The transmitter is coupled to a display apparatus and used to receive the wireless signal and provide a default warning message to the display apparatus.

Description

Video conference system and its transmitting terminal device

The present invention is related to video conferences, and more particularly to a video conference system and its transmitting end device.

Compared with the traditional Universal Serial Bus (USB) standard, the Universal Serial Bus Type-C standard provides higher power transmission capacity and data transmission speed, and the redesigned connector is smaller in size. It's more convenient. Therefore, information processing devices (such as notebook computers, etc.) on the market advertise that they are equipped with a universal serial bus Type-C port. However, based on sales strategy and cost considerations, different information processing devices usually adopt different levels of general serial bus function configurations.

For example, low-priced information processing devices usually use universal serial bus Type-C ports that can only support universal serial bus data transmission functions; medium-priced information processing devices usually support universal serial bus data Universal serial bus Type-C port for transmission function and power transmission function (or video output function); higher-priced information processing device adopts data transmission function, power transmission function and video output that support universal serial bus Type-C port for universal serial bus function. In other words, not all information processing devices equipped with a universal serial bus Type-C port can support the video output function.

However, most users do not know whether the Universal Serial Bus Type-C port of the information processing device they use supports the video output function. Therefore, when the user wants to output video through the information processing device, it is likely that the universal serial bus Type-C port of the information processing device does not support the video output function and cannot proceed smoothly, causing considerable trouble and inconvenience to the user.

For example, when a user wants to conduct a video conference with other people through an information processing device, the user couples the sender device of the video conference system to the universal serial bus Type-C port of the information processing device. At this time, if the universal serial bus Type-C port of the information processing device does not support the video output function, the information processing device cannot output the video signal to the sending end device through the universal serial bus Type-C port, resulting in video The meeting could not go smoothly.

At this time, the user may suspect that the information processing device or the video conference system is malfunctioning and the video conference cannot proceed smoothly, but the real reason is that the universal serial bus Type-C port of the information processing device does not support the video output function. Therefore, if the user couples the sender device of the video conferencing system to the universal serial bus Type-C port of the information processing device, it can be clearly informed whether the universal serial bus Type-C port of the information processing device supports video The output function should be able to effectively solve the problems and inconvenience encountered by users.

In view of this, the present invention proposes a video conference system and its transmitting end device to effectively solve the above-mentioned 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 includes a transmitter device and a receiver device. When the transmitting end device is coupled to the port of the information processing device, the transmitting end device communicates with the information processing device to determine whether the port of the information processing device has a video output function. When the above judgment result is no, the transmitting end device sends out a wireless signal. The receiving end device is coupled to the display device for receiving wireless signals and providing a preset warning message to the display device.

In one embodiment, the preset warning message is an image signal pre-stored in the transmitting end device, and is transmitted to the receiving end device through a wireless signal.

In one embodiment, the preset warning message is an image signal pre-stored in the receiving device, and the display device receives the preset warning message and directly displays the preset warning message.

In one embodiment, the port of the information processing device is a universal serial bus Type-C port, and the sending end device is coupled to the information processing device through a cable that supports the universal serial bus Type-C alternate mode (Alternate Mode) The sending end device and the information processing device conduct Power Negotiation and exchange messages with each other.

In one embodiment, the universal serial bus device chip of the sending end device obtains the output mode setting of the universal serial bus host (USB Host) chip in the information processing device. If the output mode setting is not the DisplayPort output mode, The sending device determines that the port of the information processing device does not have the video output function.

In one embodiment, when the sending end device sends a communication message related to the universal serial bus Type-C alternative mode to the information processing device without receiving a response from the information processing device, the sending end device determines the port of the information processing device Whether it has video output function.

In one embodiment, when the image output trigger key of the sending end device is pressed, the sending end device determines whether the port of the information processing device has a video output function.

Another specific embodiment according to the present invention is a transmitting end device. In this embodiment, the transmitter device is used in the video conference system. The video conference system also includes a receiving end device. The transmitting end device includes a communication unit, a control unit and a wireless transmission unit. When the transmitting end device is coupled to the connection port of the information processing device, the communication unit communicates with the information processing device. The control unit is coupled to the communication unit to determine whether the port of the information processing device has a video output function. The wireless transmission unit is coupled to the control unit. When the judgment result of the control unit is no, the wireless transmission unit sends out a wireless signal; the receiving end device receives the wireless signal and provides a preset warning message to the display device.

Compared with the prior art, when the user couples the transmitting end device in the video conferencing system of the present invention to the port of the information processing device, if the transmitting end device communicates with the information processing device, it is determined that the port of the information processing device is not With video output function, the transmitter device will send a wireless signal to the receiver device, and the receiver device will provide a preset warning message to the display device for display to inform the user that the port of the information processing device used does not have video Output function, video conference cannot be carried out.

In this way, users can clearly know that the real reason why the video conference cannot go smoothly is that the port of the information processing device does not have the video output function, and will not misunderstand that the information processing device or the video conference system is malfunctioning, so as to facilitate the user as soon as possible Use other information processing devices for video conferencing, effectively solving the troubles and inconveniences encountered by users.

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. FIG. 1 shows a functional block diagram of the video conference system in this embodiment.

As shown in FIG. 1, the video conference system 1 is coupled between the information processing device NB and the display device DP. The video conference system 1 includes a transmitter device TX and a receiver device RX. The transmitting end device TX is coupled to the information processing device NB. The receiving end device RX is coupled to the display device DP. The transmitting end device TX and the receiving end device RX communicate with each other wirelessly.

When the user couples the transmitting end device TX to the port PT of the information processing device NB, the transmitting end device TX will communicate with the information processing device NB to determine whether the port PT of the information processing device NB has a video output function.

In detail, the port PT of the information processing device NB is a universal serial bus Type-C port, and the transmitting end device TX is coupled to the information through a cable that supports the universal serial bus Type-C alternative mode (Alternate Mode) The connection port PT of the processing device NB enables the transmitting end device TX and the information processing device NB to perform power negotiation (Power Negotiation) and exchange messages with each other during the power negotiation process.

In one embodiment, during the power negotiation process between the transmitting end device TX and the information processing device NB, when the transmitting end device TX transmits a communication message C1 related to the replacement mode of the universal serial bus Type-C to the information processing device NB If the sending end device TX fails to receive the response message C2 from the information processing device NB, the sending end device TX will determine whether the port PT of the information processing device NB has a video output function, but not limited to this.

In another embodiment, when the transmitting end device TX is coupled to the port PT of the information processing device NB, if the image output trigger key of the transmitting end device TX is pressed, it means that the user wants to send the image signal of the information processing device NB Output to the transmitter device TX and wirelessly transmit to the receiver device RX through the transmitter device TX. Therefore, the transmitter device TX will determine whether the port PT of the information processing device NB has a video output function, but it is not limited to this.

In practical applications, when the transmitting end device TX is coupled to the port PT of the information processing device NB, the information processing device NB acts as a universal serial bus host (USB Host) and the transmitting end device TX acts as a universal serial bus device (USB Device). The transmitting end device TX is provided with a universal serial bus device chip and the information processing device NB is provided with a universal serial bus host chip. During the communication between the transmitting end device TX and the information processing device NB, the universal serial bus device chip of the transmitting end device TX can obtain the output mode setting of the universal serial bus host chip of the information processing device NB.

In one embodiment, when the transmitting end device TX wants to determine whether the port PT of the information processing device NB has a video output function, the transmitting end device TX may first determine the output mode setting of the general serial bus host chip of the information processing device NB Whether it is a DisplayPort output mode, and based on the above judgment result, it is determined whether the port PT of the information processing device NB has a video output function.

If the output mode of the universal serial bus host chip of the information processing device NB is set to display port output mode, the transmitting end device TX determines that the port PT of the information processing device NB has a video output function; if the universal serial bus of the information processing device NB The output mode setting of the host chip is not the display port output mode, and the transmitting end device TX determines that the port PT of the information processing device NB does not have the video output function.

When the transmitting end device TX determines that the port PT of the information processing device NB has a video output function, the transmitting end device TX will receive the image signal output by the information processing device NB through the port PT and convert it into an Internet protocol ( Internet Protocol, IP) packets are wirelessly transmitted to the receiving device RX. The receiving device RX converts the Internet protocol packet back into an image signal and outputs it to the display device DP for display.

When the transmitting end device TX determines that the port PT of the information processing device NB does not have a video output function, the transmitting end device TX sends a wireless signal WS to the receiving end device RX. When the receiving end device RX receives the wireless signal WS, the receiving end device RX will provide a preset warning message MG to the display device DP, and the display device DP will display the preset warning message MG.

It should be noted that the transmitting end device TX can also determine whether the output mode setting of the universal serial bus host chip of the information processing device NB is other video signal output mode to determine whether the port PT of the information processing device NB has a video output function. It is not limited to the foregoing embodiment.

In one embodiment, the aforementioned preset warning message MG may be an image signal pre-stored in the transmitting end device TX. When the transmitting device TX determines that the port PT of the information processing device NB does not have the video output function, the transmitting device TX transmits its pre-stored preset warning message MG to the receiving device RX through the wireless signal WS, and then the receiving device RX The device RX provides a preset warning message MG to the display device DP. When the display device DP receives the default warning message MG, the display device DP displays the default warning message MG to inform the user that the port PT of the information processing device NB used does not have the video output function.

In another embodiment, the aforementioned preset warning message MG may be an image signal pre-stored in the receiving device RX. When the receiving end device RX receives the wireless signal WS from the transmitting end device TX, the receiving end device RX transmits its pre-stored preset warning message MG to the display device DP. When the display device DP receives the default warning message MG, the display device DP displays the default warning message MG to inform the user that the port PT of the information processing device NB used does not have the video output function.

In practical applications, there is no specific limitation on the format of the preset warning message MG, and it can include one or more of different forms such as text, symbols, patterns, images, and sounds, as long as it can achieve the effect of warning users.

Please refer to FIG. 2. FIG. 2 is a schematic diagram of an application scenario of the video conference system of the present invention. As shown in Figure 2, when the transmitting end device TX is coupled to the port PT of the information processing device NB through a connection line TYC that supports the universal serial bus Type-C alternative mode, the transmitting end device TX will communicate with the information processing device NB communication.

If the sending end device TX fails to get a response from the information processing device NB during the communication with the information processing device NB, or the image output trigger button BUT of the sending end device TX is pressed, the sending end device TX will determine the information processing Whether the port PT of the device NB has a video output function.

When the transmitting end device TX determines that the port PT of the information processing device NB has a video output function, the transmitting end device TX receives the image signal output by the information processing device NB through the port PT and converts it into an Internet protocol packet PK Then wirelessly transmit to the receiving device RX. The receiving device RX converts the Internet protocol packet PK back to an image signal and outputs it to the display device DP, and the display device DP projects the image signal onto the display screen MT. Therefore, when the connection port PT of the information processing device NB has a video output function, through the video conference system 1 of the present invention, the display screen MT can display the same screen as the information processing device NB.

Please refer to FIG. 3. FIG. 3 is a schematic diagram of another application scenario of the video conference system of the present invention. As shown in FIG. 3, when the transmitting end device TX determines that the port PT of the information processing device NB does not have a video output function, the transmitting end device TX will send a wireless signal WS to the receiving end device RX. When the receiving end device RX receives the wireless signal WS, the receiving end device RX provides a preset warning message MG to the display device DP, and the display device DP projects the preset warning message MG onto the display screen MT.

Therefore, when the port PT of the information processing device NB does not have a video output function, the display screen MT cannot display the same screen as the information processing device NB. Through the video conference system 1 of the present invention, the display screen MT can display the preset warning message MGM pre-stored in the transmitting end device TX or the receiving end device RX, thereby reminding the user that the port PT of the information processing device NB does not have a video output Features.

Please refer to FIG. 4. FIG. 4 is a functional block diagram of the transmitting end device in another preferred embodiment of the present invention. As shown in FIG. 4, the transmitting end device TX includes a communication unit 20, a control unit 22, and a wireless transmission unit 24. The control unit 22 is coupled to the communication unit 20. The wireless transmission unit 24 is coupled to the control unit 22.

When the transmitting end device TX is coupled to the port PT of the information processing device NB, the transmitting end device TX communicates with the information processing device NB through the communication unit 20. The control unit 22 determines whether the port PT of the information processing device NB has a video output function according to the communication result between the communication unit 20 and the information processing device NB.

When the control unit 22 determines that the connection port PT of the information processing device NB does not have a video output function, the control unit 22 controls the wireless transmission unit 24 to send a wireless signal WS to the receiving end device RX. When the receiving end device RX receives the wireless signal WS, the receiving end device RX will provide a preset warning message MG to the display device DP for display.

In one embodiment, the preset warning message MG may be an image signal pre-stored in the transmitting end device TX. When the control unit 22 determines that the port PT of the information processing device NB does not have the video output function, the wireless transmission unit 24 transmits the preset warning message MG to the receiving end device RX through the wireless signal WS, and then the receiving end device RX performs the preset warning message MG. It is assumed that the warning message MG is sent to the display device DP for display.

In another embodiment, the preset warning message MG may be an image signal pre-stored in the receiving device RX. When the receiving end device RX receives the wireless signal WS from the wireless transmission unit 24, the receiving end device RX transmits its pre-stored preset warning message MG to the display device DP for display.

Please refer to FIG. 5. FIG. 5 is a schematic diagram of the appearance of the transmitting end device TX in the video conference system 1. As shown in FIG. 5, the transmitting end device TX may include a housing CAT, an image output trigger key BUT, a mode key MOD, and a connection line TYC. In this embodiment, the connection line TYC supports the universal serial bus Type-C alternative mode; the image output trigger key BUT is arranged on the housing CAT and the mode key MOD is arranged on the side of the housing CAT, but not limited to this.

The image output trigger key BUT is used for the user to press to start or stop the wireless transmission of image signals to the receiving device RX. The mode key MOD is used for the user to press to switch different operation modes, such as the pairing mode of the transmitting end device TX and the receiving end device RX, projection mode or video playback mode, etc. The cable TYC that supports the Alternative Mode of Universal Serial Bus Type-C is used to couple to the port PT of the information processing device NB. It can transmit different signals such as data, video, and power, and it supports Universal Serial Bus Type- The C format can be Type-C 2.0, Type-C 3.0, Type-C 3.1 (Gen1) or Type-C 3.1 (Gen2), but it is not limited to this.

Please refer to FIG. 6. FIG. 6 is a schematic diagram of the appearance of the receiving end device RX in the video conference system 1. As shown in FIG. 6, the receiving end device RX may include a housing CAR, a switch button BUR, and an antenna AN. Among them, the switch button BUR provided on the housing CAR can have a light-emitting diode indicator for the user to turn on or off the receiving end device RX; the antennas AN installed on both sides of the housing CAR are used for Receive the wireless signal WS from the transmitting end device TX.

Please refer to FIG. 7A and FIG. 7B. FIG. 7A and FIG. 7B respectively illustrate the pin configuration diagrams of the port socket and the cable plug supporting the Type-C standard of the universal serial bus. According to Figure 7A and Figure 7B, it can be seen that compared with the traditional universal serial bus standard, the universal serial bus Type-C standard has added high-speed transmission pins TX1+/TX1-, TX2+/TX2- with 10Gbps high-speed signal transmission capability. , RX1+/RX1- and RX2+/RX2-, system configuration pins CC1/CC2, connection line power supply pin VCONN and other pin configurations.

It should be noted that the cable plug that supports the Type-C standard of the universal serial bus is reversible. In other words, regardless of whether the connector plug that supports the Universal Serial Bus Type-C standard is plugged into a port socket that supports the Universal Serial Bus Type-C standard, the power connection will be correct.

In addition, since the port socket that supports the universal serial bus Type-C standard contains two pairs of data pins D+/D- connected to each other, no matter whether the universal serial bus Type-C standard cable plug is positive or Reversely plug it into a port socket that supports the Universal Serial Bus Type-C standard, and the data pins D+/D- will be connected.

For the Universal Serial Bus Type-C standard, the high-speed transmission pins used for high-speed signal transmission cannot be connected together. Therefore, a port socket that supports the Universal Serial Bus Type-C standard can detect that the Universal Serial Bus Type-C cable plug is inserted into the Universal Serial Bus Type-C port socket through the system configuration pins CC1/CC2 The direction is forward or reverse, and these high-speed transmission pins TX1+/TX1-, TX2+/TX2-, RX1+/RX1- and RX2+/RX2- are routed through hardware lines to ensure the universal serial bus Type- The pin configuration of the C standard is correct.

It is worth noting that, compared to the traditional universal serial bus standard, the universal serial bus Type-C standard introduces dual-role capabilities. Since each cable plug that supports the Universal Serial Bus Type-C standard has exactly the same upper and lower sides, when two devices supporting the Universal Serial Bus Type-C standard are coupled to each other, the two devices must be mutually coupled. Communicate to determine their respective roles as a universal serial bus host (USB Host) or universal serial bus device (USB Device).

In detail, the above-mentioned role communication procedures need to be carried out separately for data transmission and power transmission, and the cable plug that supports the universal serial bus Type-C standard needs to be inserted into the port socket that supports the universal serial bus Type-C standard. It will be done later. In terms of data transmission, as a universal serial bus host (USB Host) device, its port is called a downstream port (Downstream Facing Port, DFP), and as a universal serial bus device (USB Device) device, its The port is called the Upstream Facing Port (UFP). In terms of power transmission, a device that provides power is called a source, and a device that receives power is called a sink. The system configuration pins CC1 and CC2 are used to define the power supply roles played by the two devices during the coupling period of the two devices.

As shown in Figure 8, the downstream port DFP (source end) and the upstream port UFP (suction end) are coupled through the cable CC, the system configuration pins CC1 and CC2 of the downstream port DFP are coupled to the pull-up resistor RP and the upstream port UFP The system configuration pins CC1 and CC2 are coupled to the pull-down resistor RD. When the downstream port DFP and the upstream port UFP are not coupled, the power supply pin VBUS of the downstream port DFP has no output. When the upstream port UFP is coupled to the downstream port DFP through the cable CC, the system configuration pin CC1 of the downstream port DFP is coupled to the system configuration pin CC1 of the upstream port UFP, so that the system configuration pin of the downstream port DFP CC1 detects the pull-down resistor RD of the upstream port UFP, which means that the two are coupled. The power supply pin VBUS of the downstream port DFP (source) outputs power to the upstream port UFP (sink terminal).

It should be noted that, in the above embodiment, the system configuration pin CC1 of the downstream port DFP is coupled to the system configuration pin CC1 of the upstream port UFP. In fact, as the connection line plug is inserted into the port socket Differently, the system configuration pin CC2 of the downstream port DFP may be coupled to the system configuration pin CC2 of the upstream port UFP. Therefore, the downstream port DFP can determine whether the direction of the cable plug inserted into the port socket is forward or reverse according to the system configuration pin of the pull-down resistor RD of the upstream port UFP detected as CC1 or CC2, and correspondingly Switch the configuration of these high-speed transmission pins TX1+/TX1-, TX2+/TX2-, RX1+/RX1- and RX2+/RX2-.

In addition, compared with the traditional universal serial bus standard, the universal serial bus Type-C standard can greatly improve the power supply capacity. The traditional universal serial bus port can only provide a maximum power of 2.5W, while the universal serial bus Type-C port can provide a maximum power of 15W (that is, 5V*3A). If the Universal Serial Bus Type-C port adopts the Power Deliver (PD) protocol, it can even provide a maximum power of 100W (that is, 20V*5A). Therefore, large devices such as monitors can be powered through the Universal Serial Bus Type-C port, and devices such as laptops equipped with large-capacity batteries can also be charged through the Universal Serial Bus Type-C port.

It should be noted that these high-speed transmission pins TX1+/TX1-, TX2+/TX2-, RX1+/RX1- and RX2+/RX2- which support the Universal Serial Bus Type-C standard can provide high-speed signal transmission capabilities up to 10Gbps Therefore, traditional high-speed signal transmission through dedicated transmission lines, such as High Definition Multimedia Interface (HDMI), DisplayPort, Thunderbolt, etc., can be transmitted through a universal serial The bus Type-C connection cable can even transmit 4k high-resolution video signals at high speed. The above-mentioned operation mode is called the Alternate Mode of the Universal Serial Bus Type-C.

For example, when the transmitting end device TX is coupled to the universal serial bus Type-C port PT of the information processing device NB through a cable TYC that supports the universal serial bus Type-C alternative mode, it serves as the source end information processing device The NB and the transmitting end device TX as the suction end communicate with each other to negotiate the replacement mode of the universal serial bus Type-C.

As shown in FIG. 9, the information processing device NB as a source may include a power source (Power) 901, a universal serial bus host (USB Host) 902, a multiplexer (Multiplexer) 903, a power delivery controller (Power Delivery Controller) 904, DisplayPort Source 905 and universal serial bus Type-C port 906; as a suction end, the transmitter device TX can include a power source (Power) 911, a universal serial bus device (USB Device) 912, and a multiplexer (Multiplexer) 913, Power Delivery Controller (Power Delivery Controller) 914, DisplayPort Sink (DisplayPort Sink) 915, and Universal Serial Bus Type-C connection port 916. The universal serial bus Type-C port 906 at the source end and the universal serial bus Type-C port 916 at the suction end are coupled to each other through a connection line TYC that supports the Type-C alternative mode of the universal serial bus.

In practical applications, the universal serial bus Type-C port 906 of the source (information processing device NB) can be connected to the sink (transmit device TX) through its power supply pin VBUS and system configuration pins CC1/CC2 Type-C port 916 of the universal serial bus for physical communication. The communication process is detailed as follows:

First, the information processing device NB as the source terminal can determine the coupling state of the source terminal and the sink terminal according to whether the system configuration pins CC1/CC2 detect the pull-down resistor RD of the transmitting terminal device TX as the sink terminal.

For example, when the system configuration pin CC1 of the source terminal detects the pull-down resistor RD and the system configuration pin CC2 of the source terminal is open (Open), it means that the source terminal and the sink terminal have been coupled to each other; When the configuration pin CC2 detects the pull-down resistor RD and the system configuration pin CC1 of the source terminal is open, it also means that the source terminal and the sink terminal are coupled to each other. At this time, the information processing device NB as the source will output power to the transmitting device TX as the sink through the power supply pin VBUS.

Then, the information processing device NB can determine whether the direction in which the connection line TYC is inserted into the port PT is forward or reverse according to the system configuration pin of the pull-down resistor RD of the transmitting device TX is detected as CC1 or CC2. Correspondingly switch the configuration of these high-speed transmission pins TX1+/TX1-, TX2+/TX2-, RX1+/RX1- and RX2+/RX2- to determine the output path of the general serial bus signal. In addition, the information processing device NB as the source terminal will also determine whether its connection line power supply pin VCONN needs to supply power to the connection line TYC supporting the connection line power supply pin VCONN for charging.

After the above-mentioned power supply determination procedures have been completed, it will start to detect whether the port PT of the information processing device NB as the downstream port DFP supports the Alternate Mode of the Universal Serial Bus Type-C standard.

Universal Serial Bus (USB) Power Delivery (PD) is transmitted through the system configuration pins CC1/CC2. The universal serial bus power supply has a vendor-defined message (Vendor Defined Message, VDM) function to define the identification of the transmitter device TX as a universal serial bus device (USB Device). When the information processing device NB determines that the transmitting device TX supports the display port signal (or PCIe signal) output function based on the identification of the transmitting device TX, the port PT of the information processing device NB serving as the downstream port DFP enters the substitute mode.

In one embodiment, if the information processing device NB determines that the transmitter device TX supports the display port signal output function, the high-speed transmission pins TX1+/TX1-, TX2+ that were originally used to transmit general-purpose serial bus signals can be used in the alternative mode. /TX2-, RX1+/RX1- and RX2+/RX2- are changed to transmit display port signals, but not limited to this. Since the universal serial bus signal and the display port signal both contain four pairs of differential signals, they can be completely replaced.

In addition, in the alternative mode, the general serial bus signal and the display port signal can also be transmitted at the same time. For example, the high-speed transmission pins TX1+/TX1- and RX1+/RX1- are used to transmit the general serial bus signal, and the high-speed transmission pin TX2+/ TX2- and RX2+/RX2- are used to transmit the display port signal, but not limited to this. The advantage of this approach is that two devices can be used on the same port at the same time without any chip, which can be achieved only through a conversion cable.

In another embodiment, if the information processing device NB determines that the transmitter device TX supports the PCIe signal output function, the high-speed transmission pins TX1+/TX1-, TX2+ that were originally used to transmit general-purpose serial bus signals can be used in the alternative mode. /TX2-, RX1+/RX1- and RX2+/RX2- are changed to transmit PCIe signals.

In addition, it is also possible to transmit universal serial bus signals and PCIe signals at the same time in the alternative mode. For example, high-speed transmission pins TX1+/TX1- and RX1+/RX1- are used to transmit universal serial bus signals, and high-speed transmission pins TX2+/TX2 -And RX2+/RX2- are used to transmit PCIe signals, but not limited to this. The advantage of this approach is that two devices can be used on the same port at the same time without any chip, which can be achieved only through a conversion cable.

Please refer to FIG. 10. FIG. 10 shows a schematic diagram of a power delivery message exchange during power negotiation between a downstream port DFP as a source and an upstream port UFP as a sink.

As shown in FIG. 10, first, the downstream port DFP as the source end sends a source capabilities message (Source capabilities message) S1 to the upstream port UFP as the sink end. When the downstream port DFP receives the reply message S2 from the upstream port UFP, it means that the power connection between the downstream port DFP and the upstream port UFP has been completed.

Then, the upstream port UFP analyzes the received source function message S1 and selects the power profile to be requested, and then sends a request message (Request message) S3 to the downstream port DFP. When the downstream port DFP receives the request message S3, the downstream port DFP sends a reply message S4 to the upstream port UFP so that the upstream port UFP knows that the downstream port DFP has received the request message S3.

Then, the downstream port DFP analyzes the received request message S3 and determines whether the power configuration requested by the upstream port UFP is acceptable. If the downstream port DFP decides to accept the power configuration requested by the upstream port UFP, the downstream port DFP will send an Accept message S5 to the upstream port UFP. When the upstream port UFP receives the acceptance message S5, the upstream port UFP sends a reply message S6 to the downstream port DFP, so that the downstream port DFP knows that the upstream port UFP has received the acceptance message S5.

When the downstream port DFP switches to the power configuration requested by the upstream port UFP, the downstream port DFP will send a Ready message S7 to the upstream port UFP to let the upstream port UFP know that the downstream port DFP has switched to the upstream port UFP. The requested power configuration. When the upstream port UFP receives the ready message S7, the upstream port UFP sends a reply message S8 to the downstream port DFP, so that the downstream port DFP knows that the upstream port UFP has received the ready message S7. At this time, the power negotiation process between the downstream port DFP and the upstream port UFP has been successfully completed, and the downstream port DFP and the upstream port UFP begin to operate according to the new power supply.

Compared with the prior art, when the user couples the transmitting end device in the video conferencing system of the present invention to the port of the information processing device, if the transmitting end device communicates with the information processing device, it is determined that the port of the information processing device is not With video output function, the transmitter device will send a wireless signal to the receiver device, and the receiver device will provide a preset warning message to the display device for display to inform the user that the port of the information processing device used does not have video Output function, video conference cannot be carried out.

In this way, users can clearly know that the real reason why the video conference cannot go smoothly is that the port of the information processing device does not have the video output function, and will not misunderstand that the information processing device or the video conference system is malfunctioning, so as to facilitate the user as soon as possible Use other information processing devices for video conferencing, effectively solving the troubles and inconveniences encountered by users.

Based on the above detailed description of the preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, its purpose is to cover various changes and equivalent arrangements within the scope of the patent application for the present invention.

1: Video conferencing system TX: Transmitter device RX: receiving device NB: Information Processing Device DP: display device PT: Port of information processing device WS: wireless signal MG: Default warning message TYC: connection line BUT: Video output trigger key PK: Internet Protocol Packet MT: display screen 20: Communication Unit 22: control unit 24: wireless transmission unit CAT: shell MOD: Mode key AN: Antenna CAR: shell BUR: switch button A1~A12, B1~B12: pin number TX1+, TX1-, TX2+, TX2-, RX1+, RX1-, RX2+, RX2-: high-speed transmission pins CC1, CC2: system configuration pins VCONN: connection line power supply pin D+, D-: data pins VBUS: power supply pin GND: Ground pin SBU1, SBU2: sideband pins DFP: Downstream port UFP: Upstream port RP: pull-up resistor RD: pull-down resistor RA: resistance CC: connection line 901: Power 902: Universal serial bus host 903: Multiplexer 904: Power Supply Controller 905: Display port source 906: Universal serial bus Type-C port 911: Power 912: Universal Serial Bus Device 913: Multiplexer 914: Power Supply Controller 915: Display port suction end 916: Universal serial bus Type-C port S1: Source function message S2: Reply to message S3: Request message S4: Reply to message S5: Accept the message S6: Reply to message S7: Ready message S8: Reply to message

The drawings of the present invention are described as follows: FIG. 1 shows a functional block diagram of a video conference system in a preferred embodiment of the present invention. FIG. 2 is a schematic diagram of an application scenario of the video conference system of the present invention. FIG. 3 shows a schematic diagram of another application scenario of the video conference system of the present invention. FIG. 4 is a functional block diagram of the transmitting end device in another preferred embodiment of the present invention. FIG. 5 is a schematic diagram of the appearance of the transmitting end device of the present invention. FIG. 6 is a schematic diagram of the appearance of the receiving end device of the present invention. FIGS. 7A and 7B respectively illustrate the pin configuration diagrams of the port socket and the cable plug supporting the Type-C standard of the universal serial bus. FIG. 8 shows a schematic diagram of the downstream port and the upstream port being coupled through a connection line. FIG. 9 shows a functional block diagram of an information processing device (source) and a transmission device (suction) coupled through a connection line. FIG. 10 is a schematic diagram of power supply information exchange during power negotiation between the downstream port as the source and the upstream port as the sink.

1: Video conferencing system

TX: Transmitter device

RX: receiving device

NB: Information Processing Device

DP: display device

PT: Port of information processing device

WS: wireless signal

MG: Default warning message

Claims (14)

A video conference system is coupled between an information processing device and a display device. The video conference system includes: A sender device, when the sender device is coupled to a port of an information processing device, the sender device communicates with the information processing device to determine whether the port of the information processing device has a video output function , When the above judgment result is no, the transmitting end device sends out a wireless signal; and A receiving end device is coupled to a display device for receiving the wireless signal and providing a preset warning message to the display device. For example, in the video conferencing system described in item 1 of the scope of patent application, the preset warning message is an image signal pre-stored in the transmitting end device and is transmitted to the receiving end device through the wireless signal. For example, in the video conferencing system described in item 1 of the scope of patent application, the preset warning message is an image signal pre-stored in the receiving device, and the display device receives the preset warning message and directly displays the preset warning message. For example, the video conferencing system described in item 1 of the scope of patent application, wherein the port of the information processing device is a universal serial bus Type-C port, and the transmitting end device supports the universal serial bus Type-C alternative mode The connection line is coupled to the connection port of the information processing device, and the transmitting end device and the information processing device perform power negotiation and exchange messages with each other. For the video conferencing system described in item 4 of the patent application, a universal serial bus device chip of the transmitting end device obtains an output mode setting of a universal serial bus host chip in the information processing device, and if the output The mode setting is not the display port output mode, and the sending end device determines that the port of the information processing device does not have the video output function. For example, in the video conferencing system described in item 1 of the scope of patent application, when the sending end device sends a communication message related to the universal serial bus Type-C alternative mode to the information processing device, but the information processing device has not received In response, the sending end device determines whether the port of the information processing device has a video output function. For example, in the video conference system described in item 1 of the scope of patent application, when a video output trigger key of the transmitting end device is pressed, the transmitting end device determines whether the port of the information processing device has a video output function. A transmitting end device is used in a video conference system, the video conference system further includes a receiving end device, and the transmitting end device includes: A communication unit, when the transmitting end device is coupled to a port of an information processing device, the communication unit communicates with the information processing device; A control unit, coupled to the communication unit, for determining whether the port of the information processing device has a video output function; and A wireless transmission unit, coupled to the control unit, when the judgment result of the control unit is no, the wireless transmission unit sends out a wireless signal; the receiving end device receives the wireless signal and provides a preset warning message to a display device . For the transmitter device described in item 8 of the scope of patent application, the preset warning message is an image signal pre-stored by the transmitter device and is sent to the receiver device through the wireless signal. For example, in the transmitter device described in item 8 of the scope of patent application, the preset warning message is an image signal pre-stored in the receiving device, and the display device receives the preset warning message and directly displays the preset warning message. For example, the sender device described in item 8 of the scope of patent application, wherein the port of the information processing device is a universal serial bus Type-C port, and the sender device supports the universal serial bus Type-C alternative mode The connection line is coupled to the connection port of the information processing device, and the transmitting end device and the information processing device perform power negotiation and exchange messages with each other. As described in claim 11 of the scope of patent application, a universal serial bus device chip of the transmission end device obtains an output mode setting of a universal serial bus host chip in the information processing device. If the output The mode setting is not the display port output mode, and the control unit determines that the port of the information processing device does not have the video output function. For example, the sender device described in item 8 of the scope of patent application, wherein when the sender device sends a communication message related to the universal serial bus Type-C alternative mode to the information processing device, but does not receive the information processing device In response, the control unit determines whether the port of the information processing device has a video output function. For the transmitter device described in item 8 of the scope of patent application, when an image output trigger key of the transmitter device is pressed, the control unit determines whether the port of the information processing device has a video output function.

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