Abstract
We have developed the system for two types of LSI used in the BS digital receiver, which are the IEEE1394 LSI and the copy protection LSI for DTCP method. These LSIs have several original features, which are the ability to transmit/receive MPEG2-TS and DSS stream, full duplex transmission/receiving, and ellipse cipher calculation and contents cipher/decipher of DTCP method. We have also developed the firmware for the IEEE1394 bus system using these LSIs, and checked the validation of its system.