| 摘要 |
A network interface unit (NIU) based on an expandable home theatre (XHT) is provided with a tuner (110) which receives a broadcasting signal over an external network, a demodulator (120) which demodulates a baseband signal from the received broadcasting signal, and an NIU chipset (130) which creates a data signal based on an IEEE 1394 protocol from the baseband signal, and transmits the created signal to an A/V apparatus connected to an internal network. The NIU chipset comprises a POD interface controller (132) which outputs a scrambled transport stream included in the baseband signal, receives an encrypted signal, which is a response to the transmitted transport stream, and decodes the received encrypted signal to restore the transport stream, a de-multiplexer (133) which parses the restored transport stream and de-multiplexes the transport stream to extract a bit stream and a 1394 module (136) which converts the extracted bit stream into data signals according to the IEEE 1394 protocol. |
