a compression technique used in satellite broadcast systems. CDV is the technique used in CLI's SpectrumSaver system to compress a NTSC or PAL analog TV signal SO that it can be transmitted via satellite in as little as 2 MHz of bandwidth. CellB A Sun Microsystems Computer Corporation- proprietary video compression encoding technique developed by Michael F. Speer. cell relay The process of transferring data by dividing all transmissions (voice, video, text, image, etc.) into 53- byte packets called cells. A cell has 48 bytes of information and 5 bytes of address. The objective of cell relay is to develop a single high-speed network based on a switching and multiplexing scheme that works for all data types. Small cells favor low-delay, a requirement of isochronous service. Code-Excited Linear Prediction, a low-bit audio encoding method, a low-delay variation of which is used in the ITU-T's G.728 compression standard. channel A physical transmission path along which signals can be sent, e.g., a video channel. charge-coupled device CCD (full name Interline Transfer Charge-Coupled Device or IT CCD). CCDs are used as image sensors in an array of elements in which charges are produced by light focused on a surface. They are specialized semiconductors, based on MOS technology and consist of a rectangular array of hundreds of thousands of light-sensitive photo diodes (pixels). Light from a lens is focused onto the pixels, and thereby releases electrons (charges) which accumulate in the photo diodes. The charges are periodically dumped into vertical shift registers and moved by charge-transfer SO they can be amplified. An integrated circuit. The physical structure upon which circuits are fabricated as components of systems such as memory systems, and coding and Glossary of Terms decoding systems. chroma The color information in a television or video signal composed of hue and saturation. chromaticity The quality of light, in terms of its color, as defined by its wavelength and purity. Chromaticity charts describe this com