Audio and video
Multi-channel voice: during the conference, participants can have smooth voice calls with many people, and can support more than 100 channels of audio at the same time; Support echo suppression
System (AEC), automatic gain control (AGC), noise cancellation (NR) and other conference voice processing functions. Adopt voice priority mechanism to ensure clear and smooth audio in low bandwidth.
Multi-channel video: H264 coding and decoding technology, self-developed code stream control mechanism and bandwidth adaptive mechanism can effectively ensure better video effect when the network conditions are not good. There is no limit to the number of open video channels when the bandwidth is guaranteed.
Video round robin: Each person or individual can round robin by himself, and can set the number and interval of polling videos.
Split-screen display: it can support video and data split-screen display, and the viewing effect is better in the conference room scene.
Yuntai control: local and remote camera control can be supported through Yuntai.
Window layout: provides multiple layouts of video and data combination, and also provides multi-channel layout of multi-channel video in video window. You can adjust the video layout adaptively in the window to realize the layout of focusing, full-screen amplification and multi-channel split screen.
Auxiliary function: supports the function of testing and setting audio and video, and the host can set other people's audio and video parameters remotely.
Data * * * Enjoy:
Document * * * enjoyment: common documents such as Office, Pdf, bmp, jpg, html, txt * * enjoyment can be opened; Can * * * enjoy multiple documents or files at the same time, and can switch between multiple documents/files flexibly; The system provides a variety of marking tools, including highlighters, pointers, commonly used graphics, lines and so on. Very good support for the smooth playback of PPT animation.
Whiteboard: Support vector diagram, rich line tools, etc. Users can freely draw and write visual information on the whiteboard, which is convenient for all conference members to communicate; Electronic whiteboard supports multi-person simultaneous operation, and enhanced tools such as highlighter make the operation more flexible and convenient; The system can open multiple electronic whiteboards at the same time, and the controller can switch between these electronic whiteboards.
Desktop/program * * * Enjoy: * * Enjoy the whole desktop or select an application for other participants to view; According to the network conditions, you can choose and set in a variety of definitions; The transmitted code stream and frame rate can be adjusted independently; Local variation data transmission mode is adopted instead of full-screen compression transmission to reduce bandwidth requirements; You can authorize others to remotely control the desktop; Support labeling function.
Audio-visual playback: supports the playback of common formats such as WMV, WMA, WAV, ASF, SWF, FLV, AVI, MP3 and MPG, and supports streaming media playback.
File transmission: participants can upload and download the conference documents to realize the transmission and enjoyment of * * *;
Collaborative browsing: participants can browse the company's web pages in collaboration and operate the web pages (such as filling out forms);
Auxiliary function
Group meeting: the moderator can create multiple meeting groups during the meeting; Each group can have an independent moderator; The results of the group discussion data can be brought back to the main meeting to continue the discussion.
Text chat: support multi-person public chat and one-on-one private chat.
Question and answer: participants can ask questions freely, and questions and answers are displayed in a tree structure; The host or assistant can control whether the questions and answers are open, freeze and delete questions, and effectively control the whole answering process.
Voting: during the meeting, the host can use this function to initiate voting conveniently, and make statistics and announcement on the voting contents; When initiating a vote, the host can design the voting content and form, including the voting theme, options (single choice and multiple choice, question and answer), voting time, registration, etc. , and can check the statistical results after voting and decide whether to publish the voting results; When registering to vote, you can view everyone's complete voting results separately; Support editing and publishing multi-channel voting topics at one time.
Recording: No need to install third-party software; The host can control the recording authority; The recording is in standard asf format; Recording can be directly used for online demand.
Flexible access control: it has multiple roles such as host, speaker, assistant and participant, and can be given as needed. At the same time, the permissions of all participants and a single participant can be set, which is suitable for various scenarios.
Lock: during the meeting, if necessary, lock the whole meeting to prevent other participants from joining;
User convenience: Based on B/S architecture, users can automatically download, install and upgrade the client through common browsers with IE and Firefox as the kernel, without downloading and installing the client separately in advance; In order to ensure the participants to download and use quickly, the compressed transmission size of the client should not exceed 7m; Support Windows 2000/XP/2003/Vista; Automatically penetrate various firewalls and proxy servers.
Management function
Fixed meeting: supports meetings that are open at a specified time and can be joined at any time, and the meeting ends automatically only at the end time.
Regular meetings: support meetings that start at a set cycle, such as departmental regular meetings on Tuesdays.
Appointment meeting: make an appointment for a meeting within a certain period of time, and the meeting will end after all exits.
Organizational structure management: You can manage all the organizational structures of the whole customer and use them for meeting invitations.
E-mail reminder: When arranging and updating the meeting, send a reminder email to the host and attendees, and you can open and attend the meeting through email.
SMS integration: Provide meeting reminder function through integrated SMS gateway.
Third-party integration: provide third-party integration interface; You can easily arrange and participate in video conferences through outlook;
Server management and monitoring
Server Management: Support system administrators to manage deployed servers, start and stop servers.
Server monitor: Monitor the following modules, and view the curve change chart of each time period by time.
A) CPU, memory and hard disk usage of the server.
B) network traffic changes
C) Changes in the number of conference and parallel personnel
Alarm: When each module exceeds the warning line, the system will automatically alarm and send an email.
Application scenario
The redwood video conference system supports multiple conference access modes. Participants can enter the conference through Internet, LAN, intranet, wireless network, PSTN wired telephone network and mobile communication network, and they can join the conference in the conference room or directly through personal PC and laptop.
Enterprise private network: fully consider the favorable conditions of enterprise intranet bandwidth guarantee, and can conduct multi-channel high-definition audio and video conferences.
Internet: Considering the network instability of the Internet, data can be distributed adaptively according to the participants' network conditions to ensure the smooth transmission of data, voice and video.
Local area network: For the terminal computers in the local area network accessed through the Internet, they can automatically penetrate the firewall and other security systems to access the video conference without special settings, so as to meet the needs of participating in the video conference through company office staff;
Telephone and mobile phone access: through PSTN wired telephone network and mobile communication network, participants who are not near the computer can use telephone or mobile phone to participate in video conference;
Conference room access: by deploying conference equipment such as PC terminal, special high-definition camera for conference, plasma display or projector, audio equipment, etc. in the conference room, it is convenient for many people to join the video conference together; In addition, it also supports H323 equipment access and interworking with hardware video conferencing.
Join a notebook or PC: Through wireless or wired networks, individuals can join a video conference using a notebook or PC, which is quick and convenient and meets the needs of collaborative work within the enterprise.
technical characteristics
The video is smoother.
The most advanced H264 coding technology is the most advanced coding and decoding technology in the industry at present. Compared with MPEG-4 and h.263, H.264 algorithm has high coding efficiency, and can save about 50% bit rate compared with H.263 under the same image quality. The code stream structure of H.264 has strong network adaptability, which increases the ability of error recovery and can well adapt to the application of IP and wireless networks.
④ Intelligent video transmission: Adaptive video layered transmission technology can send different quality video streams for users with different bandwidths.
ü Support layered coding transmission control technology and packet loss recovery (PLC) technology, which can ensure the continuity of images under the condition of 30% packet loss.
ü Fully support all current video resolutions: support video resolutions from 176× 144 to 1024×768.
The audio is clearer.
ü HD call quality: adopt the world's most advanced audio coding technology to achieve clearer call effect than telephone.
ü High-quality mixing effect: Distributed mixing technology, large-scale meetings can be mixed on multiple servers at the same time.
ü Intelligent audio transmission: the audio transmission bandwidth is adaptive, and different language streams can be transmitted according to different user bandwidths.
Perfect audio processing technology: automatic gain compensation (AGC), noise suppression (ANS), echo cancellation (AEC) and mute detection (VAD).
High system stability
ü The background server adopts the most stable CentOS operating system in Linux;
ü Efficient and stable, which can ensure the efficient and stable operation of the system when thousands of users have concurrent meetings at the same time;
(4) perfect server monitor system, timely understanding of the server running status, convenient for administrators to use;
ü The client can support WINDOWS 2000/2003/XP/Vista.
Better security
ü You can hold confidential meetings with extremely sensitive contents without worrying about the company's security policies and enjoying data leakage.
ü Dynamic data encryption: data is encrypted by 256-bit AES high-intensity encryption algorithm, and the key is generated dynamically, and the key is exchanged through PKI/RSA.
Every link of the data stream is strictly encrypted: end-to-end encryption, and the data on the server side is also encrypted data.
ü Company file privacy protection measures: files enjoyed by * * * do not need to be uploaded and stored on the server.
establish and strengthen partnerships
ü Automatically penetrate all kinds of firewalls and proxy servers; Really meet the demand of "as long as you can surf the Internet, you can participate in video conferences"
ü Multi-network adaptability: adapt to the Internet, metropolitan area network, local area network, VPN network and other networks.
④ Network-wide interoperability: support the interconnection of China Netcom, China Telecom, China Mobile, China Unicom, China Tietong, Education Network and China Education and Research Network.
ü H323 integration: Support terminal integration such as H323 hardware video conference, and realize audio and video interoperability.
ü Teleconference: The integrated PSTN network can participate in meetings and speeches by telephone.
ü SIP interworking: Provides interworking function with SIP terminals.
High capacity support
ü Support conferences with a scale of 10,000 people: large-scale concurrent users can be supported, and a single conference or course can support a scale of more than 10,000 people.
ü Distributed design and bandwidth adaptive technology: it can ensure users to use it smoothly under different bandwidth conditions.