304 quantization, 513-14 Twin lines, 45, 46 video encoding standards and H.261, 516 Twin parallel wire characteristic impedance, 46 H.261 video encoder, 517-21 Two way splitter, 32 Video encoding standards, 516 Type of Service (ToS), 194 and H.261 video encoder, 517-21 Video payload format, 238-9 Video redundancy coding (VRC), 240 UDP (User Datagram Protocol) ports, 190, 193, 194 Video signals, 483 Ultrawideband (UWB) signals, 9 1080i and 1080p systems: Ultra-wideband (UWB) technology, 407, 436-9 interlaced analog component video, 493, 495 UMTS SDR receiver, 86-9 interlaced digital component video, 495-6 Unbalanced antenna, 29 progressive analog component video, 495 Unbalanced line, 30 progressive digital component video, 496-7 Uniform Theory of Diffraction (UTD), 319 480i and 480p systems: Universal Mobile Telecommunications Services (UMTS), interlaced analog component video, 484-5 interlaced analog composite video, 484 Unlicensed National Information Infrastructure (UNII) band, interlaced digital component video, 486-8 progressive analog component video, 485-6 Unmanned aerial vehicles (UAVs), 252 progressive digital component video, 488 Unmatched lines, 54 SIF and QSIF, 488 Unspecified bit rate (UBR), 168 576i and 576p systems: Uplink scheduling, 299-300 interlaced analog component video, 488-9 Upper logical link control layer, 384 interlaced analog composite video, 488 User agent client (UAC), 234 interlaced digital component video, 490 User agent server (UAS), 234 progressive analog component video, 489-90 User Datagram Protocol (UDP), 193 progressive digital component video, 490-2 Utility-based agent, 126 720p systems: UTRA (Universal Terrestrial Radio Access), 264 progressive analog component video, 492 3GPP specifications for, 263 progressive digital component video, 492-3, 494 UWB (Ultra Wide Band) systems, 317 digital component video background, 483 propagation modelling by ray tracing, 332 coding ranges, 483 UWB-SAGE algorithm, 343 EDTV sample rate selection, 484 Index HDTV sample rate selection, 484 TD