The 7 Best Technologies Of The Colour Television

The implementation of digital television networks and key technologies – Internet TV broadcast network of the IPTV industry

1 IPTV Broadband Network Implementation of Digital TV, also known as IPTV, or BTV, interactive television is the use of broadband Internet, multimedia and other technologies, and users household, including a variety of interactive digital television including new technologies. It is well adapted to the current trend of rapid development of network the full and effective use of existing resources broadband network.

In current broadband networks, home users can take advantage of the IPTV in two ways:

(A) Information: In this mode, users access the Internet through computers at the same time, you can listen to programs broadcast or music, or directly on the computer while watching TV or movies on video.

(2) Network STB (STB) + regular Television. Interface Boxes user home network STB (STB), set-top provided by the audio / video to TV, regular live and connected, the selected users by controlling the set-top box to view television channel bandwidth.

User PC users can enjoy traditional and online games Internet data services also can be converted by the receiver through specialized equipment, with a normal TV watching television, movies and other video programs to broadband.

2, the key IPTV technology The essence of
IPTV Streaming Media Applications in broadband transmission and distribution network, if the implementation of IPTV and development of key technologies by applying the following results.

(1) technologies for broadband access: the rapid development of technology broadband transmission provides a means of transmission path.

It is used in current technologies for broadband access, DSL is provided by regular phone line broadband data services technology. We used the ADSL (AsymmetricalDigitalSubscriberLine, Asymmetric Digital Subscriber Loop) technology to provide bandwidth 8 million downstream, ITU-T G.992.1 ADSL standard is already in a detailed definition. With the rapid development of technology, ITU-T one in June 2002 and January 2003: launch of two next-generation ADSL standards: ADSL2 (G.992.3) and ADSL2 + (G.992.5). Maximum support ADSL2 1.3M/15M down, while support for ADSL2 + 1.3M/24M maximum downlink rate. More bandwidth for the transmission of large amounts streaming possible.

(2) routing IP multicast: strong support for streaming media distribution.
IP multicast technology to achieve high performance IP network, multipoint data transmission. Can you effectively save network bandwidth and reduce network load. Multicast allows a sender to one or more (multicast source) to send the same packet data to multiple Recipient of a network technology, more fiber is unable to load the case, multiply business users to increase the number of programs, has become the Program first choice for large amounts of video services. In IPTV applications, the use of IP multicast routing technology, can be distributed effectively media flow, reducing network traffic. The role of current through the access device to get the user calls IGMPProxy Leave other functions to achieve and therefore the demand for streaming media to obtain the distribution. And reduce the multicast bandwidth usage. With IP Multicast in the implementation integrated access devices, most devices support and IGMPsnooping IGMPProxy function.

IGMPsnooping resolve IP multicast devices network to disseminate flood the second floor is a basic solution. network peripherals through the frame on the second floor to listen to customers and multicast Routing Protocol IGMP messages between devices, users get a list of information about the multicast services, multicast user information based on current interest to reach the second floor multicast suppression The purpose of the flood. About the Author

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