| 摘要 |
<p>An enciphering system includes head-end, network and user terminal. The head-end inlcudes CA-condition access server and nultiplexer. The user terminal includes stream receiver and I/O device. The head-end also includes scrambler which comprising digital signal processor and memory for performing the scrambling function by using corresponding program according to the command of the server. The user terminal includes demultiplexer comprising digital signal process and memory, descrambler and decoder for perfoming the function of demultiplexing, descrambling and decoding the signal by performing the corresponding program stored in the memory.</p> |
