Conference television technology introduction
In today's world, companies need efficient, reliable communication tools with their partners and customers. Through traditional switched networks, IP networks, and information on I NTERNET, people can implement rich synergistic working status including video, audio, and synchronous multimedia, which is the conference television technology we often use.
Picturetel is committed to providing a full range of collaboration programs including video, audio, data, video streaming technology, and network management. Its product Venue2000 Model50 is a standard conference TV complete system that includes the Virtuoso audio system and voice-optimized BOSE speakers as standard configuration, and Model 50 can transmit rich, full sound quality. Customers can install it in any communication and network environment. Friendly interface can operate even if it is initially used. Users can upgrade their Model50 by selecting 30PFS options to achieve more requirements for image quality and motion processing. Venue2000 Model 50 supports a variety of high-speed and low-speed network connections; Picturetel's PT7 24 broadband audio algorithm provides FM quality sound; Picturetel 320PLUS technology enables users to implement 30 frames per second by upgrading. Venue2000 Model 50 has intuitive, icon-based user interface, infrared wireless keyboard, online help, users provide easy-to-use scenarios. Also utilize a variety of conference tools, such as graphic cameras, LiveShare Plus PC applications, GroupView file projectors, and Groupboard electronic whiteboards, allowing participants to share information.
For the status quo and development of video technology, Picturetel believes that IP networks and Internet have developed rapidly, and the product in the video field is a H.323 standard video system, which includes a conference room system, and a desktop PC system. The H.323 standard video system has now developed mature, but in general, the H.320 system of traditional telecommunications networks such as ISDN is still the main application products of the remote television conference, and will not be replaced in a certain period of time.
At present, the video system is developed towards small portable development and supports H.320 and H.323 standards on a system, and can be operated in ISDN and LAN. But for the Internet, due to its own bandwidth problem, security issues, real-time issues, make it impossible to truly realize it. It can be said that there is currently no manufacturer to truly provide Internet-based commercial TV conference products. However, INTERN ET is definitely one of the development directions of video communications. In addition, wireless visual communications will also have great development.
VCON is developers, manufacturers, and vendors of video conferencing systems based on ISDN and IP networks. At present, VCON's goal is to transition from ISDNC (H.320) to an IP (H.323) network based on ISDNC (H.320). V Con Media Connect8000 is a "one machine multi-purpose" conference room for H.320 and H.323 standard dual mode of operation, which can be divided into stand-alone configuration, double-machine configuration and three machines on the combination cabinet and display configuration. Configure, panoramic mobile with a high-level conference software with a cloud-to-stop controlled camera, microphone, and user interface. Built-in ISDN Bri accessible to Microsoft Office (P OwerPoint, Word, Excel) and Microsoft Netmeeting, Multimedia Player MED IA Player. The network communication environment includes various network environments of ISDN (from 56 / 64kbps to 384kbps), LAN LAN (1.5MB PS), V.35, ATM, and E1.
VCON's third-generation video conference technology based on IP networks: interactive IP multi-point broadcast, Vcon Packets SIST system, 1.5Mbps data rate, bandwidth automatic adjustment, Internet Locator Sever (ILS), asymmetric network environment support ( XDSL), VCON post-processing algorithm (VPP), etc. to promote network video conferencing systems to the World Multimedia Communication Market. The Vcon PacketAssist package architecture architecture (VPA) refers to the VPA embedded in Group and Desktop kits, which improves the quality and management of IP video services. The fundamental characteristics are enabled to provide advanced bandwidth management and QoS functions. Adaptive bandwidth adjustment (ABA) can automatically adjust the rate of video data based on network capacity and performance. It is assumed that the rate is 1.5Mbps when the call is initiated. If network congestion occurs during the call, the call data rate will be automatically down to achieve optimal performance in the video session. The user will receive a message indicating that the data rate will be adjusted. Users can choose to turn this feature.
The VCON's hair tool package (VDK) is a complete 32-bit OCX custom control software that can be used to integrate VCON's video communications into new or existing applications. VDK is a special need for software developers to customize software development fabrics, which can create video conferencing systems by using the VCON hardware system to create a video conferencing system by user's needs, the software developed can be created. Different network environments based on the LAN, WA N based on the ISDN or IP.
VTEL USA is committed to providing customers with an overall video network solution and a full range of products and related support services.
Vtel is not only the primary provider in the H.320 field, but with the launch of the Calaxy series, the company is becoming the leader in the commercial point of the commercial point in the H.323 protocol, and its full range of products provides H.320 and H. .323 Dual mode in the freedom of conversion. The Galaxy series is like other products of Vtel, and is also based on the PC platform, which can provide multimedia video exchange. At the same time, Galaxy is based on the VTEL Scalable Architecture (VSA), which is suitable for small-scale meetings, and can meet large-scale meetings and teaching training and professional needs such as telemedicine. Vtel's new developed V-Touch has established a practical and flexible user interface, which is more intuitive and full of fun applications. It not only has high quality view and audio and image quality of general base products, but also the information sharing tools and wireless control functions have greatest the effectiveness of conference TV.
For the protection and attention of customer investment, all products of vtel can be upgraded by software without replacing hardware. At the same time, it launched the customer investment protection plan that enables VTEL's products to fully adapt to various network systems. In particular, VTEL's unique smart network management system supports remote management under the SNMP protocol, which can always detect all terminal devices around the world.
VTEL Technology Director Bao is talking about the development of H.320 and H.323 protocols that H.320 protocol has been applied for more than 20 years, which is a very mature technology, and it is still a wide range of applications. Of course, as a successful supplier must create a combination of products and services to users to provide a total solution in a hybrid network environment (Total Sotut). Therefore, VTEL has supported the conversion between H.320 and H.323 from the series of products from the desktop to large conference rooms. At the same time, with the rapid development of the Internet, Vtel proposes the concept of Internet Wind Video (IVC- Internet Visusl Comminations), making the powerful functions of traditional conference television combine the global in Ternet. It has now possessed the streaming product product Turbocast on the INTERNET. However, the future development of the H.323 agreement depends on the improvement of bandwidth. Also, although the use of IP networks can effectively save resources, the widespread application of two-way video products on the public internet is still holiday. In the next few years, three video technology and products applied to WAN (H.320), LAN (H.323), and Internet will exist.
ZTE does not only produce a full range of end products from the desktop, integrated, working group, until large room type, but also developed a full range of MCUs based on industrial computer platforms and MCU products based on switched platforms.
ZXMVC3000, the ZXMVC3000, the residential conference TV product ZXMVC3000, adds the features of the E1 and V.35 combined interfaces, built-in T.120 data function, no need to turn the page is extremely simple. Aesthetic graphical interface, built-in echo offset, I SDN interface, etc. many excellent ability. In order to adapt to the needs of large room types, many customers should have expanded the video and audio input and output interfaces.
Mr. Wang Tao, ZTE, said that the traditional voice communication technology standard is relatively single compared to the context of television technology, and is a voice communication of 3.4k, numbers 64K or 56K. Communication networks are different voice circuit switched networks. But the conference television technology has great differences in these two aspects. First, the information of its communication itself has a multi-quality multi-protocol; on the other hand, the conference television based communication network is also a variety of, ISDN, DDN, E1 line, ATM, LAN, etc. Almost all digital networks, even Includes a normal voice network. The multi-level surface of the technology must correspond to the multi-level surface of the product and market segmentation. The highest-end conference TV terminal and the lowest end meeting TV terminal not only have a certain difference in appearance and function, but also in communication protocols, channel code rates, and based on the network may be huge. And its application objects and video and audio input / output equipment are huge. Different market segmentation is a relationship between mutual compensation rather than mutual replacement.
From communication technology, the communication protocol and application level of conference television are two completely different concepts. Large room type terminals can take E1, V35 line, you can take ISDN, you can take ATM or IP. In theory, even if the conference TV network is purely established on an IP or Internet, the conference TV is also divided into room systems, integrated systems, and desktop systems from the application level.
Overall, large room type terminal market application object is quite limited, but this market will undoubtedly exist for a long time. Due to the richness of the technical level of the conference, it will inevitably correspond to the application level and the product technology platform. (Reporter Sun Yimei)
Excerpted from "Internet World" April 13, 2000
