What is the function of audio-video conference system?

Video conference, abbreviated as VC (video conference), refers to a virtual conference realized through network communication technology, which enables geographically dispersed users to get together and exchange information through graphics, sounds and other means, and supports people to communicate and share real-time information at a long distance and carry out collaborative work. Video conference greatly facilitates the real and intuitive communication between collaborative members, and also plays an important role in distance teaching and conferences.

Video conference system is an audio-visual conference service, which provides two-way real-time transmission of voice and moving color images between users in two or more locations. Large-scale video conferencing system is widely used in military, government, business, medical and other departments.

Video conference can make people communicate more effectively, because visual communication is the most natural way of communication. Therefore, reading can deepen people's understanding and memory more than speaking, especially when the topic itself is a very vivid point of view.

Some video conferencing systems are designed to allow several groups of people from different places to attend the same meeting, while others are designed to allow only a few people to discuss projects on their desktops. In any case, they can see all-round moving images, hear what others say clearly, and have a feeling of being together. In this way, video conferencing creates an environment where faster decision-making, stronger teamwork, ideas, knowledge and encouragement can be passed from one colleague to another. Another obvious advantage is that you don't have to travel.

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The cause of video conference

The appearance and development of conference TV technology has gradually changed the way of human social activities. Video communication is an indispensable part of human social and economic life. Relevant research shows that effective information depends on the visual effect of face-to-face, 33% and 38% depend on the speaker's voice, and only 7% depends on the content. Traditional communication tools such as telephone and fax machine can't realize face-to-face communication or a group of people get together. For enterprises and institutions, it has become distressing and daunting to be overloaded and travel for meetings all the year round. The use of conference TV not only achieved the purpose of holding meetings, but also avoided going on business trips in other places. From the effect point of view, it can alleviate traffic tension and save time and money. For some emergency meetings, conference TV has obvious advantages in gaining time, discussing and making decisions in time, implementing important instructions from superiors in time and obtaining important information in time. It not only allows everyone who participates in the video conference to sit in the same conference room and table for face-to-face communication, but also allows participants to conveniently handle other daily work while meeting, without worrying about business trips.

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The form of video conference

Network video conference is an important part of network conference. According to the degree of demand for software and hardware, it can be roughly divided into three forms: hardware video, software and hardware integrated video and pure software video.

Hardware video conference has always been the preferred network conference form for government and other departments because of its good audio and video effects. With the rapid development of network industry in recent years, coupled with the high price of hardware video network conference and the need for dedicated lines, the video conference system with pure software has the advantages of low price, strong adaptability and instant use, and is becoming a new force in the network conference market.

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Benefits of using video conferencing

Video conferencing enables people from different places to communicate with each other-whether it's a 10 minute walk or a 10 hour flight. It enables people to exchange ideas and information as if they were in the same room. This means that people don't have to spend working hours waiting for emails, faxes or express delivery. In short, video conferencing brings people together.

Accelerate the product development cycle and shorten the time to market.

Reduce travel expenses.

Improve the utilization efficiency of employees' time.

Provide wider and deeper recruitment and improve the quality of employment decision-making.

Balance work/life and retain employees.

Accelerate the decision-making process and improve employee satisfaction.

It is easier to complete the task of remote access experts or employees.

Expand business scope.

Improve communication efficiency with home office workers, customers, partners and suppliers.

Reduce hydrocarbon emissions, improve the environment, reduce oil consumption and solve traffic congestion problems.

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Product form of video conference

At present, the product form of video conference is mainly divided into two parts: multipoint control unit (MCU) and video terminal. Multipoint control unit is what we usually call MCU. It is the core part of video conference. Under the H.323 standard, MCU consists of a basic multipoint controller (MC) and zero or more multipoint processors (MP). The MC processes the H.245 protocol among all terminals to determine the general audio and video processing capabilities, and controls the conference resources by determining which audio and video streams will be multicast. At the same time, it supports meetings between three or more points.

At present, the mainstream product on the market is single chip microcomputer; Based on H.323 protocol; Video terminal is a client that provides one-way or two-way real-time communication. All video terminals must support voice communication, and video and data are optional. H.323 specifies the operation modes required for different audio, video and/or data terminals to work together, and it will become the dominant standard in the technical field of next-generation Internet telephony, teleconference and video conference. Common video terminals in the market mainly include the following types: set-top box, desktop integrated terminal (including video terminal and LCD screen), simple terminal connected to PC, and software terminal used with USB camera and earphone.

Video conference system supporting SIP protocol will be the future development direction.

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The function of video conference [1]

What can video conference do for people?

Video conferencing makes people who attend meetings in different places feel like they are having a "face-to-face" conversation with each other, which can replace on-site meetings in effect.

Network video conference distributes the participants' images, videos, sounds, texts and other materials to other users' computers. The parties attending the meeting are like living in a room, not only can they talk face to face; And all other images, files and other materials can be shared with each other through the network.

Geographically dispersed users can conduct the following activities through video conferencing.

Express your opinions and talk to other users through your own computer.

② Observe each other's image, movements and expressions.

⑧ Shared files: All users can browse the shared files in a user's computer at the same time.

④ Collaboration: During the discussion, you can use various software tools to mark key points in the document and edit the document together.

⑤ Browse the images or texts displayed on the screen blackboard and whiteboard together.

There are many communication methods for network video conference. After users connect with each other through the network, they transmit all kinds of information, such as voice, video, image, text and so on. , so as to increase the participants' understanding of the contents of the meeting and realize the real-time communication between people in different places.

Users who use the video conference system can save time, reduce or even avoid misunderstandings in the communication process, thus ensuring efficient communication.

Video conference not only gets rid of the distance limitation, but also avoids the time-consuming and laborious long-distance running, saving a lot of conference expenses. Video conference not only saves manpower and financial resources, but also improves work efficiency, and plays an important role in office automation, emergency rescue, on-site command and dispatch and many other aspects. Video conference system is one of the most promising technologies at present, and the huge market demand has promoted the rapid development of video conference technology.

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Display and application of some functions of video conference

Display and application of some functions of video conference

From the scope of use, video conferencing system can be divided into desktop, group and group; There are hardware systems, software and hardware systems and pure software systems.

Generally speaking, video conferencing has the following basic functions and applications:

1, real-time audio and video broadcasting

Excellent audio-video interaction ability. In the master control mode, the host chooses to play the video of the participants, and the system allows multi-channel voice and video to be played simultaneously.

Step 2 watch the video

In non-main mode, conference members can freely watch videos with each other.

3. Electronic whiteboard

The system provides a number of whiteboards, through which participants can draw vector diagrams, input text, paste pictures and so on.

4. Document sharing

The speaker of the meeting can put the prepared speech in the document sharing area in advance or during the meeting. When the host is listed as the current speaker, the document can be displayed to everyone simultaneously.

5. Network sharing

Members of the meeting can guide everyone to a specific website and analyze problems together.

6. List of participants

Displays the number of participants and their status, which can be used to view videos and grant the right to speak.

7. Text discussion

Conference members can chat and send messages to all, some or one of them through the text chat system in the conference system. In addition, the dictionary filtering function of the system can filter those uncivilized words that often appear.

8. System messages

Show the events in the conference system, such as others watching your video, speeches in the system, and some system operations of the host.

9. Vote at the meeting

During the meeting, the moderator can put forward several different views on a certain issue, and the voting system of the meeting can help the leaders to make judgments and decisions quickly.

10, send file

Before or during the meeting, the speaker can send his speech to the participants.

1 1, desktop sharing

The auxiliary function of video conference is mainly used to solve the close cooperation problem when they work together. This function is to share the desktop operated by the speaker with everyone, and also to let others operate their own desktop.

12, meeting recording

During the meeting, the meeting record function can record the whole meeting for editing, reference and archiving after the meeting.

13, remote setting

In order to ensure the smooth progress of the conference, the host can adjust the bandwidth used by the conference members to a suitable range through remote settings.

14, kicked out of the meeting room.

Powerful control function, it is easy to ask unruly meeting members out of the meeting room.

15, system settings

Conference members can choose the corresponding video compression format according to the network environment, so as to adjust the bandwidth required by the system and ensure the best effect of the conference.

18, User Management

Users who can use the conference system can be added and deleted flexibly, and the existing user information can be modified flexibly to prevent unauthorized personnel from entering the conference system and interfering with the normal meeting. etc

The "convenience, efficiency improvement and cost control" brought by video technology has been deeply rooted in people's hearts. With the promotion of broadband construction in China, the update and development of video technology and the further reduction of system cost, video conferencing will be more widely popularized.