SD CATV CA system

Description

The scrambler replace the transparent TS NULL to users address, authorize data, and scrambler the effective load of transmitting stream by random secret key. Every set-top box has an exclusive address code corresponding with the ID one the box. The CAS sends addressable address, authorized information and suppressor code to legal users. When the set-top box received the authorized information which is corresponding with the authorized information, you can get the view right and descramble code. The descramble module used the descrambled code corresponding with the programs, descramble the effective load of transmitting stream, then use MPEG*2 decode chip to get the TV program. Function: 1: 4 channels scrambler, with high performance and cost advantage 2: Scramble classified by channel, then upgrade to scramble by programs 3: with **5 scrambled area, *6 addressable area, 2 kinds of area management 4: The addressable range can attain ****0, the total addressable range can be *0 million. 5: The addressable velocity can be ***0 users per second. 6: Adopt random code and special scrambled arithmetic, the system is very safe. 7: The scramble can work independently when it maintains the users management system and database, it wont influence the viewing. 8: The receiver adopts the special descrambled chip, low cost, no need CA integrated software, no need IC card. 9: The descramble chip has its own users address, one machine, one number, it is very convenient to manage. *0: The IC card edition can support the match with machine and care, and add the OSD display and authorized undue inform of CA. *1: The descrambled chip can hold TS data and wont influence the software upgraded. Technique Parameter 1: Addressing speed ***0 per secBaud rate :****0bps 2: Addressing range 1MCould extend to a hundred million 3: Addressing type Grouping AddressingSingle Addressing 4: Scrambling partition **6 partitionse