Patent ID: 8280050

Claim:
A digital television signal receiving system, comprising: a receiver, comprising a tuner for receiving a digital television signal; a demodulator for demodulating the received digital television signal; a demultiplexer; an interface outputting the demodulated digital television signal to an external module when an external module processes the demodulated digital television signal and outputting the demodulated digital television signal from the demodulator directly to the demultiplexer without outputting the demodulated digital television signal outside when the external module does not process the demodulated digital television signal; the external module comprising a descrambler for inputting the demodulated digital television signal; and an encryptor for encrypting the descrambled digital television signal and for outputting the encrypted digital television signal to the interface; wherein the demultiplexer for receiving and demultiplexing the output from the interface.