encing, case study, 29 control unit, 262 dichroic mirrors, 79 Controlled Delay (RSVP), 180 differences in small-group systems, 246 Controlled Load (RSVP), 180 Diffie-Hellman, 317 convergence time, 255 digital networks COS, 206 Alternate Mark Inversion (AMI), 194 cosine Extended Super Frame (ESF), 194 definition of, 101 Digital sampling COST 211, 112 Harry Nyquist, 92 crisis management digital signal processing (DSP), 251 case study, 23 digital versatile disk (DVD), 344 CSMA/CD, 225 digital video Index encoding, 91 orthicon tube, 78 Digital Video Interactive (DVI) early electronic TV Intel's early video compression scheme, Archibald Campbell-Swinton, 69 early out-of-band signaling direct acoustic coupling, 273 Common Channel Interoffice Signaling Discrete Cosine Transform, 417 (CCIS), 198 Discrete Cosine Transform (DCT) early radio zig-zag scanning, 102 Radio Corporation of America (RCA), 68 Discrete Wavelet Transform (DWT), 417 early TV Distance Learning, 31, 391, 447 2TV, 71 North Slope Borough School District, 41 Bell Labs, 71 Distance Training, 32 Boris Rosing, 69 Distance Vector Multicast Routing Protocol British Broadcasting Company (BBC), 69 (DVMRP), 185 Charles Jenkins, 70 distance-collaboration, 289 David Sarnoff, 73 DMIF, 350, 353, 354, 414, 418 electro-mechanical television, 73 document camera, 262, 280, 282, 373 John Logie Baird, 70 ceiling-mounted systems, 276 National Broadcasting Company, 74 document collaboration products, 291 Philo T. Farnsworth, 73 document conferencing, 12 Phonovision, 72 domain name, 172 three-D color television, 72 Domain Name System (DNS), 171 Westinghouse, 70 Dow Jones Irwin Handbook of early video Telecommunications Management, 56 Alexander Graham Bell, 68 DS-1 signal, 193 Paul Nipkow, image scanning, 69 DS-2, 94 Selenium, 68 DS-3, 94 Earth in the Balance, 32 DSL, 213 echo cancellation, 255, 274 DSM-CC, 149 methods, 274 Duke Power Company echo control, 251 emergency response, 30 echo suppression, 255,273 DVMRP EIA RS-449/422, 278 how it works, 185 Electrical and Electronic 