COMPOSITE SCRAMBLE RELEASE APPARATUS FOR A PLURALITY OF SCRAMBLED DIGITAL BROADCASTING STREAMS IN A BROADCASTING COMMUNICATION FUSION SYSTEM AND AN OPTICAL SUBSCRIBER NETWORK APPLYING THE SAME

摘要

PURPOSE: A composite scramble release apparatus for a plurality of scrambled digital broadcasting streams in a broadcasting communication fusion system and an optical subscriber network applying the same are provided to allow a user to watch all MPTSs(MultiProgram Transmission Streams) provided from the broadcasting communication fusion system using only one set-top box. CONSTITUTION: A broadcasting receiving unit(31) receives an MPTS from the outside, and transmits PID(Program ID) information of the MPTS to a control unit(33). A switch(32) receives the MPTS from the broadcasting receiving unit, switches an MPTS which is scrambled and an MPTS which is not scrambled, and outputs the switched MPTS. A plurality of descramblers(34-1,34-2) descramble the scrambled MPTS in the MPTS switched through the switch, and output the descrambled MPTS. The control unit receives PID information from the broadcasting receiving unit, and controls the switch so that an MPTS necessary for being descrambled is switched to the descramblers.