Such kind ofdigitalized TV transmission system has such advantages as little damage of the signals andclear effects of pictures and many functionsAt present, our TV broadcasting system hasn’t completely realized digitalization in termof program-making, broadcasting, transmission and users.
A smartcard conditional access interface scheme for conditional access subsystem separation in digital TV broadcasting
Conditional access system (CAS) is a key technical component in digital TV broadcasting through which TV operators manage the appropriate rights of different subscribers in order to protect their commercial benefits.
This scheme is also one of the candidate national standards for Chinese digital TV broadcasting industry.
It can be applied to live TV broadcasting environments as well as recorded broadcasting environments.
Wireless communication is used in many different situations such as mobile telephony, radio and TV broadcasting, satellite communication, and military operations.
In recent years digital TV broadcasting technology has been developing very quickly all over the world, and it will soon replace analogue TV. Facing such a situation, China should seize the oppertunity, accept the challenge, stimulate developing steps to catch up with those developed countries.
With the progresses in computer technology TV Broadcast comes from The age of analog to the digital age. The TV enginers must change over knowledge, view and set up digital concept, to suit the above requirements of the digital age at the tum of the age.
HFC is a good method for traditional CATV broadcasting to realize tw0-way transmission.In this paper,the structure of HFC networks is analyzed in detail,and the upgrading of telecommunication and CATV networks are discussed.