ABSTRACT
The channel coding may very well be different for terrestrial broadcast, cable, satellite, wireless cable, or tape recording, even though they carry the same form of source coding. Included in this function is any modulation required. The advanced television (ATV) systems use different channel coding schemes with three basic technologies. The technologies are: quadrature amplitude modulation (QAM), multi-level vestigial sideband, and pulse amplitude modulation (PAM). There are other forms of modulation possible to carry the kinds of signals under consideration for Advanced Television. Examples are such forms as Quadrature Phase Shift Keying (QPSK) and Coded Orthogonal Frequency Division Multiplex (COFDM). The chapter analyses aspects of the systems that will impact transmitter plant design. The systems are: DigiCipher, advanced digital-high definition television (AD-HDTV), digital spectrum compatible HDTV (DSC-HDTV), and narrow-multiple sub-nyquist sampling encoding (Narrow-MUSE). The chapter focuses on how the various choices impact the designs that will be required for transmitter plants.
