TWI398168B - Multi-user videoconference system, remote management system and method for facilitating videoconference - Google Patents

Description

Multi-user video conferencing system, remote management system and method for performing video conference

The present invention relates to a multi-user network video conferencing system, a remote management system, and a method for performing a video conference, and particularly relates to a low-cost multi-user network video conferencing system, a remote management system, and a network. The method of video conferencing.

With the rise of the Internet and the advancement of technology, video conferencing systems have been widely used for real-time network communication across regions. Existing video conferencing systems generally provide a peer-to-peer mode or a multi-end mode. However, when using the multi-end mode, the existing video conferencing system must integrate and load balance the transmission data of each endpoint through a multipoint control unit (MCU) to solve the multi-user video conference. Network transmission problem.

Please refer to FIG. 1 , which illustrates a schematic diagram of a conventional video conferencing system. The video conferencing system 100 includes a multipoint control unit 110, a first computer device 122, a second computer device 124, and a third computer device 126. Since the conventional video conferencing system 100 is balanced for the transmission data of the respective endpoints (122, 124, and 126), the multipoint control unit 110 needs to access the first computer device 122, the second computer device 124, and the third computer device 126. The transmission sequence, re-production, mixing and transmission are coordinated and controlled. Taking the first computer device 122 as an example, the multipoint control unit 110 needs to receive image data uploaded from the first computer device 122 and transmit images, audio or other images uploaded by the second computer device 124 and the third computer device 126. The data is sent to the first computer device 122. That is, for a single endpoint (e.g., 122), the multipoint control unit 110 needs to process 3 channels of transmitted data. For 3 endpoints, the multipoint control unit 110 needs to process at least 9 units of transmitted data amount.

Since the multipoint control unit 110 needs to integrate and load balance the transmission data of each endpoint, it must also have the processing capability of multiple uploading/downloading data, so the performance of the multipoint control unit 110 is high and the price is also high. The cost of purchasing or renting a multipoint control unit by the participants of the video conferencing system becomes a burden.

The present invention relates to a multi-user network video conferencing system, and a method for performing a multi-user network video conference using a remote management system, and dynamically adjusting an image for capturing images by using the remote management device of the present invention. Taking parameters, it is possible to reduce the amount of network data transmission.

According to a first aspect of the present invention, a multi-user video conferencing system is provided, comprising at least a first user terminal program, a second user terminal program, a third user terminal program, a KVM switch, and a dynamic Image adjustment module. The first user program is executed on a first computer device, and the first computer device includes a first video capture device. The second user program is executed on a second computer device, and the second computer device includes a second video capture device. The third user program is executed on a third computer device, and the third computer device includes a third video capture device. The remote management management device KVM switch is connected to at least one host computer host, and is connected to the first computer device, the second computer device, and the third computer device via a network. The first computer device, the second computer device, and the third computer device perform a video conference by establishing multi-party communication, and the dynamic image adjustment module receives one according to the first computer device, the second computer device, and the third computer device. The voice signal, or the computer performance of the first computer device, the second computer device, and the third computer device, or the network connection download/upload speed, establishes a corresponding set of image capturing parameters, so that the first video capturing device, The second video capture device and the third video capture device capture and transmit the image according to the corresponding image capture parameters.

According to a second aspect of the present invention, a method of performing a video conference is provided, comprising at least the following steps. A first user terminal program, a second user terminal program, a third user terminal program, a remote management device, and a motion image adjustment module are provided. The first user program is executed on a first computer device, the first computer device includes a first video capture device, the second user program is executed on a second computer device, and the second computer device includes a first computer device. The second video capture device, the third user program is executed on a third computer device, and the third computer device includes a third video capture device. The remote management device is connected to the at least one host computer host and connected to the first computer device, the second computer device, and the third computer device via a network. One of the first computer device, the second computer device, and the third computer device sends a video conference request command to the remote management device, so that the first computer device, the second computer device, and the third computer device pass the remote management device Establish multi-party communication for video conferencing. The dynamic image adjustment module is based on whether the first computer device, the second computer device, and the third computer device receive a voice signal, or the computer performance or network connection of the first computer device, the second computer device, and the third computer device. The line downloading/uploading speed establishes a corresponding set of image capturing parameters, so that the first video capturing device, the second video capturing device, and the third video capturing device are captured and transmitted according to the corresponding image capturing parameters. image.

According to a third aspect of the present invention, a remote management system is provided, including at least one remote management device, a first user terminal program, a second user terminal program, and a third user terminal program. The remote management device is connected to at least one host computer host. The first user program is executed on a first computer device, so that the first computer device can manage the remote management device and control the host computer host via a network, and the first computer device has a first video capture device. The second user program is executed on a second computer device, so that the second computer device can manage the remote management device and control the host computer host via the network, and the second computer device has a second video capture device. . The third user program is executed on a third computer device, so that the third computer device can manage the remote management device and control the host computer host via the network, and the third computer device has a third video capture device. device. The user of the first computer device, the second computer device, and the third computer device can perform a video conference by using a remote management system. Wherein, if the first video capturing device, the second video capturing device, or the third video capturing device is determined to receive the voice signal, the image is captured by the first image quality. If the first video capture device, the second video capture device, or the third audio capture device is determined not to receive the voice signal, the image is captured by the second image quality, where the image quality is captured by the second image quality. The amount of image data is lower than the amount of image data captured by the first image quality in order to reduce the amount of network data transmission.

According to a fourth aspect of the present invention, a method of performing a video conference is provided, comprising at least the following steps. A remote management device is provided. The remote management device enables a plurality of computer devices to manage and control at least one host computer host via a network, and each computer device has an audio and video capture device. It is determined whether each video capture device receives a voice signal. If so, the video capture device captures the image with a first image quality. If not, the video capture device captures the image with a second image quality. The amount of image data captured by the second image quality is lower than the amount of image data captured by the first image quality.

In order to make the above-mentioned contents of the present invention more comprehensible, a preferred embodiment will be described below, and in conjunction with the drawings, a detailed description is as follows:

The present invention provides a multi-user network video conferencing system, a remote management system, and a method for performing a network video conference. The remote management device dynamically adjusts image capturing parameters for capturing images, so that no multi-point control unit is needed. Data coordination is achieved, which reduces the amount of network data and reduces costs.

Please refer to FIG. 2, which is a schematic diagram of a multi-user video conferencing system in accordance with a preferred embodiment of the present invention. The multi-user video conferencing system 200 is substantially a remote management system, and includes at least a first user program, a second user program, a third user program, and a remote management device 220. A motion image adjustment module 225. The remote management device 220 can be a keyboard-video-monitor switch. The remote management device 220 is connected to at least one host computer host (for example, 242, 244, and 246), but the number is not limited. The remote management device 220 is coupled to the first computer device 212, a second computer device 214, and a third computer device 216 via a network 230. The network 230 is, for example, an internet or a regional network. The dynamic image adjustment module 225 is integrated into the remote management device 220 in FIG. 2, but the dynamic image adjustment module 225 can also be configured by the first user program, the second user program, and the first The components of the three user-side programs are combined. When the dynamic image adjustment module 225 is integrated into the remote management device 220, the dynamic image adjustment module 225 can manage one of the hardware, the body or the soft body of the remote device 220 or a combination thereof. For example, the remote management device 220 can perform the functions of the dynamic image adjustment module 225 described below by its central processing unit with appropriate code.

The remote management device includes a network interface and a computer interface. The network interface may further include an RJ-45 port for connecting to a CAT-5 network route, but the network interface may also be a wireless network interface, and the wireless network interface may include a wireless transceiver. And an antenna. The computer interface can include at least one set of keyboard/mouse ports, an image port, and/or an audio port. The keyboard/mouse port can be a PS/2 port or a USB port that provides a keyboard/mouse signal interface between the host computer host and the remote management device 220. This image port can be a VGA port, a DVI port, an HDMI port, or any other suitable image transfer port. In a preferred embodiment, the remote management device can be a network type KVM switch.

The first user terminal program is executed on the first computer device 212, so that the first computer device 212 can manage the remote management device 220 and control the host computer hosts 242-246 via the network 230. For example, the first computer device 212 can transmit its keyboard/mouse signal to the host computer host 242~246 via the network and the remote management device, and then the host computer host 242~246 is adapted to the first computer device 212. The keyboard/mouse signal transmits its video signal to the first computer device 212 via the remote management device and the network. The first computer device 212 includes at least a computer host, an input device or cursor control device (such as a keyboard/mouse), a screen, and a first video capture device 252 (such as a webcam and a microphone). In more detail, the first user program can convert the keyboard/mouse signal output by the first computer device 212 into a network packet (for example, a network packet conforming to the TCP/IP format) to upload to the network, and Image packets from the network are converted to general analog or digital video signals that are acceptable on a computer screen. Thus, the first computer device 212 can control the remote management device and the host computer hosts 242-246 to which the remote management device is connected via the network. In addition, the remote management device converts the general analog or digital video signal output (for example, digitalization and compression) outputted by the host computer host 242~246 into a network format image package and uploads it to the network, and The keyboard/mouse packet from the network is converted into a keyboard/mouse signal of the network readable by the host computer host 242~246.

In addition, the second user program is executed on the second computer device 214, so that the second computer device 214 can manage the remote management device 220 and control the host computer hosts 242-246 via the network 230. The second computer device 214 includes at least a computer host, a screen, and a second video capture device 254 (eg, a webcam and a microphone). The third user program is executed on the third computer device 216, so that the third computer device 216 can manage the remote management device 220 and control the host computer hosts 242-246 via the network 230. The third computer device 216 includes at least a computer host, a screen, and a third video capture device 256 (eg, a webcam and a microphone). The second client program and the third client program have the same functions as the first user program.

Please refer to FIG. 2 and FIG. 3 simultaneously. FIG. 3 is a flow chart showing a method for performing a video conference according to a preferred embodiment of the present invention. In step S300, the first computer device 212, the second computer device 214, and the third computer device 216 send a video conference request command to the remote management device 220, so that the first computer device 212 and the second computer device 214 And the third computer device 216 can establish multi-party communication via the remote management device 220 for video conferencing. In step S310, the motion picture adjustment module 225 obtains the picture sampling rate (computer performance) of each of the computer devices 212 to 256 by the video and audio capture devices 252 to 256. In step S320, the motion picture adjustment module 225 obtains the network connection download/upload speed of each of the computer devices 212-256. In step S330, it is determined whether the first computer device 212, the second computer device 214, and the third computer device 216 receive a voice signal input by the computer user. In this embodiment, the user of the computer device receiving the voice signal can be regarded as the temporary leader of the video conference, and the uploaded video signal will enjoy better image quality.

In step S340, the dynamic image adjustment module 225 receives a voice signal according to the first computer device 212, the second computer device 214, and the third computer device 216, or the first computer device 212, the second computer device 214, and The computer performance of the third computer device 216 or the network connection download/upload speed dynamically establishes a corresponding set of image capture parameters. Each group of image capturing parameters is selected from a group consisting of a picture sampling rate, a picture update rate, a picture pixel, and a picture size. In step S350, the first video capturing device 252, the second video capturing device 254, and the third video capturing device 256 extract and transmit images according to the corresponding group of image capturing parameters. The image uploaded by a certain computer device may be downloaded to other computer devices via the remote management device 220, or may be directly transmitted by using the peer-to-peer transmission technology without using the remote management device 220.

The following is an example for explanation. If the first video capture device 252 of the first computer device 212 is determined to receive the voice signal, and the second video capture device 254 of the second computer device 214 and the third video capture device 256 of the third computer device 216 are If the voice signal is not received, the user of the first computer device 212 is regarded as the speaker and the leader of the video conference, so the motion picture adjustment module 225 sets the first video capture device 252 to capture the highest image. The image capture is performed, and the second video capture device 254 and the third audio capture device 256 are set to perform image capture with lower image capture parameters. That is, the first video capture device 252 captures the image with a first image quality, and the second video capture device 254 and the third video capture device 256 capture the image with a second image quality. The amount of image data captured by the second image quality is lower than the amount of image data captured by the first image quality. Therefore, the amount of image data uploaded to the network by the computer devices 214 and 216 that have not received the voice signal in a unit time period is lower than the amount of image data transmitted by the computer device 212 receiving the voice signal in a unit time. For example, if it is assumed that the amount of data uploaded by the first computer device 212 is one, the amount of data uploaded by the second computer device 214 or the third computer device 216 can be adjusted to one-half or even one-third. In the preferred embodiment of the present patent, the image quality determining factor or the image capturing parameter includes at least: a total pixel of the screen, a resolution, a sampling rate, a refresh rate, a compression ratio, and the like. . For example, the first computer device 212 The image update frequency may be as high as 60 KHz, and the image update frequency of the second computer device 214 or the third computer device 216 may be only 30 KHz.

Similarly, if the first computer device 212 is judged to have better computer performance, and the second computer device 214 and the third computer device 216 are judged to have poor computer performance, the dynamic image adjustment module 225 sets the first video capture device. The image capturing is performed by using the highest image capturing parameter, and the second video capturing device 254 and the third video capturing device 256 are configured to perform image capturing with lower image capturing parameters. Therefore, the amount of image data transmitted by the computer devices 214 and 216 with poor computer performance per unit time is lower than the amount of image data transmitted by the computer device 212 having better computer performance per unit time. This computer performance can be judged by its CPU clock speed, dynamic memory capacity, display card performance or network card performance.

Similarly, if the first computer device 212 is judged to have a better network connection download/upload speed, and the second computer device 214 and the third computer device 216 are judged to have a poor network connection download/upload speed, then the dynamic The image adjustment module 225 sets the first video capture device 252 to perform image capture with the highest image capture parameter, and sets the second video capture device 254 and the third audio capture device 256 to perform image capture with lower image capture parameters. Capture. Therefore, the computer devices 214 and 216 with poor network connection download/upload speeds have a higher amount of image data uploaded to the network per unit time than the computer device 212 with better network connection download/upload speed. The amount of image data uploaded to the network during the time is low. For example, a user who uses a Modem (download speed of only 56K) as the Internet access device may upload an image quality that is worse than that of an ADSL (download speed of at least 2M) or an optical fiber for the user of the Internet device.

It is assumed that only the first computer device 212 receives the voice signal, and the amount of image data transmitted by the computer devices 214 and 216 that have not received the voice signal per unit time is transmitted in a unit time compared to the computer device 212 that received the voice signal. The amount of image data is low and is set to half. Compared with the case where the present invention is not used, the amount of transmission data for a single endpoint is reduced to 2 units of transmission data (that is, the total output data amount × 1 + half of the received data amount × 2 or half of the output data amount × 1) + Half received data amount × 1 + Complete received data amount × 1). Please refer to FIG. 4A and FIG. 4B. FIG. 4A illustrates a transmission data scale of a conventional video conference system, and FIG. 4B illustrates a transmission data gauge of a multi-user video conference system according to a preferred embodiment of the present invention. For the three endpoints, the total transmitted data volume of the multi-user video conferencing system 200 is reduced to 6 units of transmitted data, which is a 33% reduction in the amount of transmitted data compared to the conventional 9 units. In addition, if the number of users is increased to four, the total amount of data uploaded/downloaded can be reduced from 16 units to 8 units. In other words, the greater the number of users, the greater the total amount of data uploaded/downloaded. It is worth noting that the above three judgments can be chosen one by one. Not all three judgment methods need to be used at the same time. The above three judgment methods also have no priority relationship.

The first user program, the second user program and The third client program exchanges messages with each other to jointly establish and manage the image capture parameters described above. On the other hand, since the remote management device 220 does not actually need to integrate and load balance the transmission data of the respective endpoints, the performance requirements for the remote management device 200 can be further reduced.

Another possible embodiment is that one of the first user program, the second user program, and the third user program is used as a master, which is responsible for establishing and managing the image capture parameters to dynamically Adjust the amount of network data transmission of the entire videoconferencing system.

The multi-user network video conferencing system, the remote management system, and the method for performing the network video conference disclosed in the foregoing embodiments of the present invention have a plurality of advantages. The following only some of the advantages are described as follows: the multi-user network video conference of the present invention The system, the remote management system, and the method for performing a network video conference use a remote management device to establish a multi-user video conference, and the video image is adjusted by the dynamic image adjustment module according to the voice state of each endpoint, and the computer. Performance or network quality adjusts the image capture parameters of each endpoint, eliminating the need for remote management devices for data coordination, thereby reducing network data throughput and reducing costs.

In view of the above, the present invention has been disclosed in a preferred embodiment, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100‧‧‧Video Conference System

110‧‧‧Multipoint control unit

122, 212‧‧‧ first computer equipment

124, 214‧‧‧ second computer equipment

126, 216‧‧‧ third computer equipment

200‧‧‧Multi-user video conferencing system

220‧‧‧Remote management device

225‧‧‧Dynamic Image Adjustment Module

230‧‧‧Network

242~246‧‧‧Controlled computer host

252‧‧‧First video capture device

254‧‧‧Second audio and video capture device

256‧‧‧ Third video capture device

FIG. 1 is a schematic diagram of a conventional video conferencing system.

2 is a schematic diagram of a multi-user video conferencing system in accordance with a preferred embodiment of the present invention.

FIG. 3 is a flow chart showing a method for performing a video conference according to a preferred embodiment of the present invention.

Figure 4A shows a transmission data scale of a conventional video conferencing system.

FIG. 4B is a diagram showing a transmission data amount table of a multi-user video conference system according to a preferred embodiment of the present invention.

200‧‧‧Multi-user video conferencing system

212‧‧‧First computer equipment

214‧‧‧Second computer equipment

216‧‧‧ third computer equipment

220‧‧‧Remote management device

225‧‧‧Dynamic Image Adjustment Module

230‧‧‧Network

242~246‧‧‧Controlled computer host

252‧‧‧First video capture device

254‧‧‧Second audio and video capture device

256‧‧‧ Third video capture device

Claims (34)

A multi-user video conferencing system includes: a first user terminal program, executed on a first computer device, the first computer device includes a first video capture device; and a second user terminal program On a second computer device, the second computer device includes a second video capture device; a third user program is executed on a third computer device, the third computer device includes a third video device a multi-computer switch, connected to at least one host computer host, and connected to the first computer device, the second computer device, and the third computer device via a network; and a dynamic image adjustment module The first computer device, the second computer device, and the third computer device establish multi-party communication via the KVM switch to perform a video conference, and the motion image adjustment module is configured according to the first computer device. Whether the second computer device and the third computer device receive a voice signal to establish a corresponding first group of image capturing parameters, and the dynamic image adjusting module is configured according to the first Establishing a second set of image capturing parameters corresponding to the computer performance of the brain device, the second computer device, and the third computer device, and the dynamic image adjusting module is configured according to the first computer device and the second computer device a third set of image capturing parameters is established by the network connection download/upload speed of the third computer device, so that the first video capturing device, the second video capturing device, and the third video capturing device The device extracts and transmits the image according to the corresponding first group, the second group, and the third group of image capturing parameters. Multi-user video conferencing system as described in claim 1 The dynamic image adjustment module adjusts the corresponding image capturing parameter of the first group, so that the amount of image data transmitted by the computer device that has not received the voice signal in a unit time is higher than the computer device that receives the voice signal. The amount of image data transmitted during unit time is low. The multi-user video conferencing system of claim 1, wherein the dynamic image adjustment module adjusts the corresponding second set of image capturing parameters, so that the computer device with poor computer performance is transmitted in a unit time. The amount of image data is lower than the amount of image data transmitted by a computer device with better computer performance per unit time. The multi-user video conferencing system of claim 1, wherein the dynamic image adjustment module adjusts the corresponding third set of image capturing parameters, so that the computer device with the poor network connection download/upload speed is The amount of image data transmitted per unit time is lower than the amount of image data transmitted by a computer device with a better network connection download/upload speed per unit time. For example, in the multi-user video conferencing system described in claim 1, wherein each group of image capturing parameters is in a group consisting of a picture sampling rate, a picture update rate, a picture pixel, and a picture size. Elected. The multi-user video conferencing system of claim 1, wherein the first user program further enables the first computer device to manage and control the KVM switch and the host computer host. The multi-user video conferencing system of claim 1, wherein the second user program further enables the second computer device to manage and control the KVM switch and the host computer host. The multi-user video conferencing system of claim 1, wherein the third user program further enables the third computer device to manage and control the KVM switch and the host computer host. The multi-user video conferencing system of claim 1, wherein the dynamic image adjustment module is a part of the first user program, the second user program, and the third user program Composed of. The multi-user video conferencing system of claim 1, wherein the image transmitted by the first computer device to the second computer device and the third computer device is via the KVM switch. The multi-user video conferencing system of claim 1, wherein the image transmitted by the first computer device to the second computer device and the third computer device does not pass through the KVM switch. The multi-user video conferencing system of claim 1, wherein the network is an internet or a regional network. A method for performing a video conference includes at least the following steps: providing a first user terminal program, a second user terminal program, a third user terminal program, a KVM switch, and a motion image adjustment module. The first user program is executed on a first computer device, the first computer device includes a first video capture device, and the second user program is executed on a second computer device, the second The computer device includes a second video capture device, the third user program is executed on a third computer device, and the third computer device includes a third video capture device, and the KVM switch is connected to at least one The host computer host and connected to the first computer device, the second computer device, and the first via a network a third computer device; the first computer device, the second computer device, and the third computer device send a video conference request command to the KVM switch, so that the first computer device, the second computer device, and the The third computer device establishes multi-party communication via the KVM switch for video conferencing; and the dynamic image adjustment module determines whether the first computer device, the second computer device, and the third computer device receive a voice signal. Establishing a corresponding first group of image capturing parameters, and the dynamic image adjusting module establishes a corresponding second group of images according to the computer performance of the first computer device, the second computer device, and the third computer device. Taking a parameter, and the dynamic image adjustment module establishes a corresponding third group of image capturing parameters according to the network connection download/upload speed of the first computer device, the second computer device, and the third computer device, The first video capturing device, the second video capturing device, and the third video capturing device are configured to depend on the corresponding first group, the second group, and the third group of images Capture parameters and transfer images. The method for performing a video conference as described in claim 13 further includes: the motion image adjustment module adjusting the corresponding first group of image capturing parameters, so that the computer device that does not receive the voice signal is in unit time The amount of image data transmitted within the device is lower than the amount of image data transmitted by the computer device receiving the voice signal per unit time. The method for performing a video conference as described in claim 13 further includes: the motion image adjustment module adjusts the corresponding second group of image capture parameters, so that the computer device with poor computer performance is in a unit time pass The amount of image data transmitted is lower than the amount of image data transmitted by a computer device with better computer performance per unit time. The method for performing a video conference as described in claim 13 further includes: the dynamic image adjustment module adjusts the corresponding three sets of image capture parameters to enable a computer device with a poor network connection download/upload speed The amount of image data transmitted per unit time is lower than the amount of image data transmitted by a computer device with a better network connection download/upload speed per unit time. The method for performing a video conference as described in claim 13 wherein each group of image capturing parameters is in a group consisting of a picture sampling rate, a picture update rate, a picture pixel, and a picture size. Elected. The method for performing a video conference as described in claim 13 further includes: the first user program further enabling the first computer device to manage and control the KVM switch and the host computer host. The method for performing a video conference as described in claim 13 further includes: the second user program further enabling the second computer device to manage and control the KVM switch and the host computer host. The method for performing a video conference as described in claim 13 further includes: the third user program further enabling the third computer device to manage and control the KVM switch and the host computer host. For video conferencing as described in claim 13 The method includes the first user program, the second user program, and a portion of the third client program. The method for performing a video conference as described in claim 13 further includes: transmitting, by the first computer device, the image to the second computer device and the third computer device via the KVM switch. The method for performing a video conference as described in claim 13 further includes: the first computer device does not transmit images to the second computer device and the third computer device via the KVM switch. A method of performing a video conference as described in claim 13 wherein the network is an internet or a regional network. A remote management system includes at least: a remote management device connected to at least one host computer host; a first user program executed on a first computer device to enable the first computer device Administering the remote management device and controlling the host computer host via a network, and the first computer device has a first video capture device; and a second user program is executed on a second computer device The second computer device can manage the remote management device and control the host computer host via the network, and the second computer device has a second video capture device; and a third user program Executing on a third computer device, so that the third computer device can manage the remote management device and the control via the network The third computer device has a third video capture device; wherein the first computer device, the second computer device, and the user of the third computer device can use the remote device The terminal management system performs a video conference; determines whether the first video capture device, the second video capture device, or the third video capture device receives the voice signal; and determines the first video capture device, the second The computer performance of the video capture device or the third video capture device; determining the network connection download/upload speed of the first video capture device, the second audio capture device, or the third audio capture device; If the first video capture device, the second video capture device, or the third video capture device is determined to receive the voice signal, the image is captured by a first image quality; An audio and video capture device, the second video capture device, or the third video capture device is determined not to receive the voice signal, and the image is captured by a second image quality, wherein the image is captured by the second image quality Shadow The amount of image data is lower than the amount of image data captured by the first image quality; wherein, if the first video capture device is determined to be better than the second video capture device and the third video capture device The computer performance of the device captures the image of the first video capture device with a third image quality, and captures the image of the second video capture device with a fourth image quality, and uses a fifth image quality. The image of the third video capture device is captured, wherein the amount of image data captured by the fourth image quality and the fifth image quality is lower than the amount of image data captured by the third image quality; If the first video capture device is determined to have a network connection download/upload speed that is better than the second video capture device and the third video capture device, the sixth image quality is captured. The image of the first video capture device captures the image of the second video capture device with a seventh image quality, and captures the image of the third video capture device with an eighth image quality, wherein The amount of image data captured by the seventh image quality and the eighth image quality is lower than the amount of image data captured by the sixth image quality. The remote management system of claim 25, further comprising: a dynamic image adjustment module, configured to determine the first video capture device, the second audio and video capture device, or the third audio and video capture device Whether the device receives the voice signal to determine the computer performance of the first video capture device, the second video capture device or the third video capture device, and to determine the first video capture device, The network connection download/upload speed of the second video capture device or the third audio capture device. The remote management system of claim 25, wherein the dynamic image adjustment module is configured by the first user program, the second user program, and the third user program It is composed of a small part. The remote management system of claim 25, wherein the first computer device, the second computer device, or the third computer device further comprises at least one computer host, one screen, one network camera, and one microphone. The remote management system of claim 25, wherein the remote management device is a network type KVM switch (keyboard-video-monitor Switch). The remote management system of claim 25, wherein the voice signal is sent by a user of the first computer device, the second computer device, or the third computer device. A method for performing a video conference includes at least the following steps: providing a remote management device, wherein the remote management device enables a plurality of computer devices to manage and control at least one host computer host via a network, each of the computers The device has an audio and video capture device; and determining whether each of the audio and video capture devices receives a voice signal; determining the computer performance of each of the audio and video capture devices; determining the network connection of each of the audio and video capture devices / uploading speed; if the voice signal is received, the video capturing device captures the image with a first image quality, and if the voice signal is not received, the video capturing device captures the second image quality If the first video capture device has better computer performance than the second video capture device, the first video capture device captures the image with a third image quality, and the second video capture device The image is captured by a fourth image quality; if a third video capture device has a network connection download/upload speed better than a fourth video capture device, the third video capture device is set. The image is captured by a fifth image quality, and the fourth image capturing device captures the image by using a sixth image quality; wherein the amount of image data captured by the second image quality is compared with the first image quality The amount of image data captured is low, and the amount of image data captured by the fourth image quality is smaller than the image captured by the third image quality. If the amount of image data is low, the amount of image data captured by the sixth image quality is lower than the amount of image data captured by the fifth image quality. The method for performing a video conference as described in claim 31, wherein the computer devices further comprise at least one computer host, a screen, a web camera and a microphone. The method for performing a video conference as described in claim 31, wherein the remote management device is a network type KVM switch. The method of performing a video conference as described in claim 31, wherein the voice signal is sent by a user of the first computer device, the second computer device, or the third computer device.