s corresponds to the NTSC system's 525- line, 30 fps, 60 fields-per-second audio-video delivery system. It is also a subjective concept, used to describe an audiovisual signal that delivers quality that appears to be approximately as good as that of television. broadcasting A means of one-way, point-to-multipoint transmission. For our purpose, we will consider this Glossary of Terms word to have two meanings. First it is the relaying of audio/visual information across the frequency spectrum where it propagates in free space and is picked up by properly equipped antennas. Second, it is the placement of information on digital networks (LAN, MAN or WAN) which can support many different applications including cable television. See business television. buffer A storage reservoir designed to hold digital information in memory. Used to temporarily store data when the circuit used to transmit it is engaged or when differences in speed are involved. burst To send a group of bits in data communications, typically in a baseband transmission scheme. A color burst is used for synchronization in the NTSC standard for color television. bursty data Information that flows in short intense data groupings (often packets) with relative long silent periods between each transmission burst. A common path shared by multiple input and output devices. In the computer world a bus can be the short cable link between terminals networked in an office; in the world of circuitry a bus can be a thin copper wire on a printed circuit board. In video production, there are program buses that determine what is sent to the record deck, preview buses that allow a video source to be shown on a separate monitor, and mixing buses which work with special effect generators and which allow separate video signals to be combined. business television Point-to-multipoint videoconferencing. Often refers to the corporate use of video for the transmission of company meetings, training and other one-to-many broadcasts. Typically incorporates satellite transmission m