Patent ID: 6591419
Filing Date: 2003-07-08
Classification: H04L,H04N

Abstract:
A network of digital multi-media devices connected through a serial bus conforming to the IEEE 1394 standard, comprising:a receiver for receiving a scrambled transport stream comprising command data and a plurality of multiplexed channels from an external source and outputting the scrambled transport stream onto the serial bus; at least one Conditional Access Module for receiving the scrambled transport stream output by the receiver from the serial bus, descrambling at least one of the multiplexed channels in accordance with the command data, and outputting the descrambled channels onto the serial bus; the Conditional Access Module being a separate component device connected to the serial bus and comprising at least a descrambler, a coder, a microprocessor, and a serial bus port; and at least one digital multi-media device for receiving the descrambled channels output from the Conditional Access Module.