Digital Television Transmission and Broadband Network Technologies

Digital television (DTV) network is medium that transports moving images, in the form of digital video signal and accompanying sound, in the form of digital audio signal, from one point to another. However, the system may include data and control signals and hence may be thought of as a multimedia system. Various network technologies find use in the digital television production and transmission of digital television signals. All transmission media are analog channels, but binary digital signals are so tolerant of channel characteristics that they are easily handled. The capability of most communication channels is much greater than what binary transmission requires. Many methods are available for digital television transmission over various channel types for different applications and picture quality requirements. These are the subjects of this paper. The important topics such as: network properties, quality of picture requirements, video interface design, aspects of coding and new transmission formats, will be taken into consideration.