Abstract
Mobile TV has become a reality offered on several mobile delivery systems. Among them is the Advanced Television System Committee (ATSC) system for mobile and handheld digital television services, known as ATSC Mobile DTV or ATSC M/H, which has moved from standardization to implementation. As the North American broadcast industry is preparing to provide Mobile DTV service to consumers, this work discusses important technical parameters that affect the TV service quality and capacity. Since additional error correction mechanisms were added to overcome mobile transmission problems, the available payload for M/H services is limited. This creates a need to efficiently use the available M/H bandwidth. The paper aims to optimize the Mobile DTV service capacity while maintaining an acceptable perceived quality. It presents tradeoffs between several factors affecting service capacity and signal robustness, which is prominent for designing Mobile TV broadcasting scenarios.
Highlights
The concept of television viewed on mobile devices has been a reality since 2005, when South Korea began satellite and terrestrial TV
The cell information table (CIT) is only useful for a multifrequency network environment, so the user would be able to continue watching the same service when traveling between different coverage areas
The problem solution succeeded in optimizing mobile DTV service capacity, by maximizing the number of TV services without compromising the service quality
Summary
The concept of television viewed on mobile devices has been a reality since 2005, when South Korea began satellite and terrestrial TV. The physical layer incorporates the mobile data into the legacy ATSC transmission It includes all the features of International Journal of Digital Multimedia Broadcasting. ATSC signals and incorporates new features unique to ATSC M/H, which include two-dimensional block forward error correction coding (i.e., Reed-Solomon error coding) of RS frame for byte errors and serial concatenated convolutional coding (SCCC) of the mobile payload for improved signalto-noise ratio. The ATSC mobile DTV is built around a highly robust transmission system coupled with flexible IP-based transport system and efficient video and audio coding, some of these features add to the overheads that constraint the payload carried by the channel. The study in this paper brings forward the optimization of mobile DTV service capacity, by maximizing the number of TV services without compromising the service quality It discusses it within the boundaries dictated by the requirements for link robustness and compatibility with legacy system. The paper is organized as follows: Section 2 presents the problem modeling, Section 3 illustrates the results and discusses tradeoffs and potentials of TV quality versus robustness, and Section 4 concludes the paper
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