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Satellite Glossary A-B | C-D | E-F | G-H | I-J | K-L | M-N | O-P | Q-S | T-V | W-Z M Modulation:  The alteration of a carrier wave in relation to the value of the data being transfered. Analog satellite transmissions use FM modulation. Digital satellite transmission use QPSK modulation. MPEG:  Moving Pictures Experts Group - international standards organisation which developed the MPEG standard for the digital compression and multiplexing of video and audio signals. Multiswitch:  Device used to combine and distribute off-air antenna/cable TV signals and DBS satellite signals. Multicast:  Transmitting information to a select group. For example, sending an E-mail to a mailing list. Teleconferencing and videoconferencing also use multicasting. Multiplex:  To combine two or more independent signals into one transmission channel, or the combined digital signals transmitted on one satellite transponder. N Near-Video-on-Demand:  Films provided for cable TV or satellite viewers from a menu of titles. The same film starts again after a defined time period, such as every 15 to 30 minutes. Home | Residential Products | About Us | Contact Us © 2003 Stallions Satellite and Antenna - All rights reserved.