METHOD OF CONTROLLING TWO-WAY REAL-TIME MOTION PICTURE TRANSMISSION SYSTEM USING SATELLITE

摘要

PURPOSE: A method of controlling a two-way real-time motion picture transmission system using a satellite is provided to enable remote educations and video conferences using motion pictures in real time. CONSTITUTION: Remote education and video signals applied to a QPSK modulator of a satellite subscriber terminal are modulated to be sent to a high power amplifier of the terminal. The remote education and video signals are amplified and output to a satellite through an antenna. The signals are output to an antenna of a central controller, and than sent to a low noise block converter. The signals are output to a QPSK demodulator, modulated to be output to a subscriber authentication unit of the central controller. The subscriber authentication unit outputs the signals to an IP gateway. The signals are output to a QPSK modulator, modulated and transmitted to a high power amplifier of the central controller. The signals are amplified, output to the satellite to be modulated by the satellite, and sent to an antenna of a counterpart's satellite subscriber terminal. The signals are output to a low noise block converter, and then sent to a QPSK demodulator to be demodulated. The demodulated signals are output to a satellite reception card. The signals applied to the satellite reception card are transmitted to a codec. The signals are converted into video and audio signals and displayed to allow the first and second subscribers to be able to see and hear the video and audio signals.