By Jian Song, Zhixing Yang, Jun Wang
This publication covers channel coding and modulation applied sciences in DTTB structures from the final ideas to the distinctive research and implementation. * Covers the chinese language DTTB average which was once introduced lately and hasn t been coated intimately * Introduces the SFN community utilizing the profitable implementation of DTMB in Hong Kong to illustrate * Introduces the newest introduced structures together with the ATSC M/H and DVB-NGH
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Additional info for Digital Terrestrial Television Broadcasting: Technology and System
There is no multiplexing needed in the analog TV system as video and audio signals are separately modulated and transmitted. Using the widely used MPEG-2 as an example for the DTV multiplex transport standards, the data format after the multiplexing is in transport stream (TS) format with a fixed data packet length of 188 bytes. The TS stream is convenient for the channel transmission, and various time tags used for indication and synchronization can be easily inserted into the TS streams. Pay TV is very popular now and also widely believed to be an important feature for the future TV.
CENELEC cooperates with technical experts from 19 EC and European Free Trade Association (EFTA) member states to prepare voluntary standards which help facilitate trade between countries, create new markets, cut compliance costs, and support the development of a single European market. CENELEC also works closely with other technical committees in fields such as television and cable classification. 1 Constitution of DTV System A complete DTV broadcasting system consists of three key components; the transmitting head-end system, transmission system/distribution network, and user terminal system.
Statistics show that most people in the world still rely on terrestrial broadcasting networks to receive TV programs, with the percentage in China over 60%. This book mainly focuses on the core technologies and performance of the DTV terrestrial transmission system, which lay down the foundation for the various applications of DTV systems. The key video compression concepts will also be introduced in this chapter. Figure 1-1 Classifications of DTV infrastructure. It is generally acknowledged that the transmission environment for a satellite or cable channel is very similar to the ideal additive white Gaussian noise (AWGN) channel, and adoption of both advanced channel coding and modulation can make the performance of both satellite or cable broadcasting approach the theoretical limit.