MULTIMEDIA SERVICE SYSTEM BASED ON BANDWIDTH EFFICIENCY BETWEEN PERSONAL COMPUTER AND SET TOP BOX IN MULTIMEDIA SATELLITE COMMUNICATION SYSTEM

摘要

PURPOSE: multimedia service, such as multicast, broadcast etc. are provided in the multimedia satellite communication system of personal computer and set-top box based on bandwidth efficiency multimedia service), consider bandwidth efficiency in personal computer and set-top box. CONSTITUTION: set-top box (4) is by RF units (41), MPEG-2 TS receiving units (42), CDMA units (43), processor (44), network interface (45), and service information memory cell (46). The transmission that RF units (41) execute the high-frequency signal of frequency down conversion and low noise amplification comes from central station. The MPEG-2 transmission of the MPEG-2 TS receiving units (42) demodulation is wrapped from central station. The CDMA transmission units (43) execute CDMA conversions and adjust to be transmitted to the central station. Processor (44) controls so that receiving the date can be transmitted personal computer (5) by MPEG-2 TS receiving units (42). Network interface card (45) executes the set-top box and personal computer (5) of the interface of (4). The information on services that the necessary underlying services that information on services is stored in the information storage services information in storage unit (46) are sent is from central station. Personal computer (5) is by subscriber programs (51), PNM (personal computer network monitoring) programs (52) and bandwidth information storage unit (53).