摘要
IPTV is directly related to the current 3 operational networks (the cable TV network, Internet and telecom network) and the services they offer. However, different network operators have different expectations of IPTV. For telecom operators, IPTV organizes and transports TV programs over IP networks; while for cable TV operators, IPTV provides digital TV programs and other information services through cable TV networks. IPTV is broadly categorized into broadcast services and interactive services, which are carried respectively by the unidirectional broadcast network and the bidirectional interactive network. Therefore, convergence of the bearer networks is hard to implement. Instead, the convergence will occur on the service layer, so as to make full use of the two existing bearer networks to develop services cost-effectively. IPTV is capable of delivering broadcast, multicast as well as interactive services. It is expected to be the beginning of triple play.
IPTV is directly related to the current 3 operational networks (the cable TV network, Internet and telecom network) and the services they offer. However, different network operators have different expectations of IPTV. For telecom operators, IPTV organizes and transports TV programs over IP networks; while for cable TV operators, IPTV provides digital TV programs and other information services through cable TV networks. IPTV is broadly categorized into broadcast services and interactive services, which are carried respectively by the unidirectional broadcast network and the bidirectional interactive network. Therefore, convergence of the bearer networks is hard to implement. Instead, the convergence will occur on the service layer, so as to make full use of the two existing bearer networks to develop services cost-effectively. IPTV is capable of delivering broadcast, multicast as well as interactive services. It is expected to be the beginning of triple play.
