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CSA2.1 descrambler
The CSA 2.1 descrambler IP core is hardware implementation of DVB Common Scrambling Algorithm version 2.1. It was designed to remove protection from scrambled broadcast data by flow-through decryption of transport stream. It has simple custom interface for data with flow control and APB 3.0 slave interface (backward compatible with APB 2.0) for set keys.
The CSA 2.1 descrambler IP core was designed for handling up to four different transport streams with even and odd keys for each TS.
The CSA 2.1 descrambler IP core was designed for handling up to four different transport streams with even and odd keys for each TS.
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Block Diagram of the CSA2.1 descrambler
