Making Mobile TV a Reality: A Technical Model for Successful Service Delivery
The views and opinions expressed in this article are those of the author and do not necessarily reflect the position of the Society of Motion Picture and Television Engineers - SMPTE.
This paper was originally presented by Thomas Edwards at the 2013 HPA Tech Retreat, February 18 – 22.
The past few years have seen pioneering work in the development and delivery of digital television signals to mobile devices. Broadcasters throughout the U.S. are using the broadcast spectrum to provide content, including live local and national news, sports and entertainment programming, to a growing number of portable devices. In establishing these services and supporting systems, broadcasters faced a variety of challenges. The following paper discusses the lessons learned through this process and provides insight that may inform future launches of mobile DTV services.
Mobile DTV Development
The original specification for DTV in the U.S. was A/53, developed in 1993. This standard determined that a large amount of data, 19.39 Mbits/sec, fit into the 6 MHz then required by a single analog channel. To make this approach work, the standard presumed a model that used a stationary receiver— an antenna 30 ft high with a 6- to 10-dB gain—to provide content to a large cathode ray tube display. Given these elements, there was no sense that mobile reception would be a priority, much less a possibility. Thus, the DTV training sequences included in the standard were appropriate only for stationary multipath signals. There was no concept of mobile reception on a handheld device or with a small antenna on the ground or in motion.
Making Mobile TV Work
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