![]() However, as Liam Power from ONE Media pointed out in the paper “Audio Services Over ATSC 3.0: A Proof of Concept,” transmitting audio to receivers in vehicles in a bandwidth-efficient manner is not that simple. The ATSC 3.0 standard includes options for Dolby AC-4 and MPEG-H multichannel audio. 1: BPS Time Stabilization System using ATSC 3.0 (Image credit: National Space-Based Positioning, Navigation, and Timing Advisory Board )Īt first, the idea of sending audio broadcasts (radio) over ATSC 3.0 sounds simple. For example, the length of the transmission line on a 2,000-foot tower will change with temperature, and timing in the path from where ATSC 3.0 time is generated to the transmitter site may also change.įig. ![]() One of the questions I had about precision timing was how the differences in timing in the transmission chain were accounted for. The concept of using ATSC 3.0 to provide precision time and positioning is not new. ![]() Loss of GPS timing, whether due to failure or intentional disruption, will have a significant impact on the systems we depend on-indeed, high-precision position, navigation and timing (PNT) has been recognized as a national security concern. The topic of using ATSC 3.0 as a backup for GPS was discussed in the session “Delivering Traceable Reference Time for ATSC 3.0-based Broadcast Positioning System (BPS),” by Patrick Diamond of Diamond Consulting and co-authored with Tariq Mondal and Robert Weller from NAB and Andrew Hansen at Volpe Center.ĭuring the session they listed some of the critical services that depend on precise timing from GPS, including mobile wireless networks, equity trading systems and power grid synchronization as well as multiple services requiring precise position information.
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