subject: On Two-way Digital Cable Television Business And Technological Transformation - Digital Cable Tv, [print this page] First, the development of two-way business conditions are
Transfer policy as a whole in all pilot and non-implementation of the pilot cities, China Cable Digital TV Users rapid expansion of the scale, has broken through 40 million mark, in Beijing, Tianjin and Shanghai and some cities, led the demonstration effect, the overall shift in capital cities and cities developed rapidly.
Present, China's digital cable TV market has entered an "era after the whole turn." The digital TV business is maturing, but also add value to business development to the two-way trend. In 2008, some cities began to complete the whole translation of the large-scale transformation of two-way networks, two-way STB Domestic shipments reached 7,167,400 units (including the basic type set-top box with card), the main flow Hunan Province, Dongguan, Hangzhou, Suzhou, Shanghai, Yangzhou, Zibo, etc., of which Hunan relatively more two-way set-top boxes.
In the digital television Overall conversion The market has been completed, with recording shows and times STB PVR functionality will soon become the second major set-top box market. As for the PVR set-top boxes, has started integrating with the two-way technology, development pushTV business. Currently, companies have started launching set top box HD , Two-way in a digital home media center to passage of set-top boxes compatible with high-end features and multimedia management, and playback functions as a selling point. Therefore, set-top box to the direction of integration, HD, PVR, two-way set-top box will be integrated in a terminal to realize an integrated digital home multimedia business.
Cable set-top box market from the point of view, as the overall translation market is basically saturated, so growth in 2009 compared to the previous two years there will be a breakthrough development, is expected to digital cable TV set-top boxes in 2009 to nearly 65 million units. Two-way set-top boxes in 2009 will be Cable television Carriers, the overall conversion of flagship products will further increase its market share will reach 35% of set-top box market. Two-way set-top box has two development opportunities: the first is with the Digital Cable TV Two-way transformation , The new two-way business can promote two-way set-top box into the family alternative to the basic type set-top boxes; another family in the city is the second of television time to buy, there will be a large part of people to buy two-way high-definition set-top box or even a set-top box. Therefore, we expect two-way set-top box market in 2010 will become a mainstream product.
2, two-way digital cable TV Transformation Technology
2008 3 21, two-way access to cable networks in China Industry Alliance (BiCA) was set up in Beijing. In the two-way cable network construction and transformation process, must make the cable TV network Audio and Video Their strengths, select the appropriate technology throughout the network conditions and characteristics of the construction and transformation of technology solutions to multi-way network to promote the transformation of business development, laid to carry out two-way business radio and television network infrastructure, making basic cable network has the bandwidth, bi-directional, multi-function carrying capacity, to expand radio and television services.
1. CableModem Technology The current two-way cable distribution of the access network technology of transformation application is one of more CableModem technology. CableModem is a downlink and uplink bandwidth asymmetry in technology, suitable for providing both Internet access and VoD services. Which can be used to provide Internet access service "HFC + CableModem + Ethernet / ATH" approach. Central Office needs with a HFC Headend Equipment, by ATM or Fast Ethernet and Internet connectivity, and complete signal modulation and mixing functions. Data signals through the HFC network (HFC) transmitted to the user at home, CableModem complete signal decoding, demodulation and other functions, and digital signal through the Ethernet port to send to the PC. Conversely, CableModem PC, transfer not to receive the uplink signal, encoded, modulated pass through HFC head-end equipment.
CableModem the early users will be able to enjoy a very high quality service, this is because in the case of small number of users of bandwidth lines are very abundant. However, users join each CableModem will increase noise, occupied channel, reduce the impact of circuit reliability and quality of service on the existing users. This will be CableModem urgent need to address a major problem. It also hindered the broadcasting operators to further promote the two-way broadband network transformation.
