Kawasaki, Japan – June 5, 2025: Media Links, a leading provider of IP media transport solutions, announced today a technology and application proof-of-concept in collaboration with SKY Perfect JSAT Corporation and Seiko Solutions Inc.
The three companies successfully demonstrated the use of Precision Time Protocol (PTP) to achieve precise synchronization of broadcast signal transmission over a long-distance Ethernet connection between Tokyo and Kagoshima. The trial employed Media Links’ MDP3020 SFN modular IP media gateway. Until now, synchronous transmission of broadcast signals over such long-distance Ethernet circuits was considered impractical. This advancement paves the way for improving coverage and spectral efficiency in digital terrestrial broadcasting systems and IP-based distribution networks.
Background
Digital terrestrial broadcasting serves a critical public function, delivering essential information such as news and emergency updates. However, long-distance signal transmission via wireless communication poses challenges due to the high cost of relay station installation, geographical constraints, and limited suitable locations.
To address these limitations, SKY Perfect JSAT has been exploring more flexible and cost-effective solutions using Ethernet circuits to enable low-latency, high-quality broadcast signal transmission over long distances.
Project Overview
For this initiative, Media Links supplied STL/TTL transmission solutions (Note 1) that integrate IP/PTP technology, using the MDP3020 SFN and RPTP devices (Note 2) to correct PTP traffic across Ethernet lines and enable high-accuracy time synchronization. The Grandmaster TS2910 (Note 3), manufactured by Seiko Solutions Inc., was deployed to provide the precise timing source.
Working with SKY Perfect JSAT, the project achieved high-precision PTP-synchronized transmission across a nearly 1,000 km Ethernet line, an important step toward building more robust and adaptable broadcast infrastructures.
- Note 1: A system that utilizes IP networks and high-precision synchronization technology (PTP) to stably and efficiently transmit broadcast signals from a broadcasting station to a transmission station or between transmission stations.
- Reference: 道内テレビ配信ネットワーク回線において 北海道総合通信網株式会社様とIPベースで構築することで合意 – Media Links Japan
- Note 2: RPTP Equipment from Network Additions, Inc.
- Note 3: PTP grand master clock suitable for telecom (LTE, 5G) and wide-area deployment type high-precision time synchronization systems represented by IoT (TSN).
- Reference: https://www.seiko-sol.co.jp/products/time_server/time_server_lineup/time-server-pro_ts2910/
About Media Links
Well recognized and trusted for its reliable media transport solutions that deliver high value content over IP networks, Technology and Engineering Emmy® Award winner Media Links helps deliver exceptional live sporting and entertainment experiences to audiences across the globe. Major recurring events include the Winter and Summer Olympics, World Cup Soccer, American Football, Baseball and Basketball games, political conventions, entertainment showcases, and much more.
Media Links IP technology is optimized for broadcasters, service providers, rights holders, and content owners, providing low latency, bandwidth efficient, fail-safe operation with both unsurpassed video quality as well as high speed “hitless” data transmission capability. The Media Links IP portfolio includes media gateways, modular transport platforms, aggregation/core switches, and management control software, supporting formats up to 4K UHD resolutions and network bandwidths to 100G. Solutions are specifically designed to interoperate with industry standards, provide a bridge from legacy interfaces to IP, and flexibly accommodate workflows for current and evolving applications like remote, distributed as well as cloud production. Professional services are also available for network design, installation, and maintenance.
Media Links is headquartered in Kawasaki, Japan with offices in the USA and Australia. Its stock is listed and traded on the Standard Market of the Tokyo Stock Exchange under Security Code Number 6659. Visit us at www.medialinks.com and follow us on LinkedIn and X / Twitter. Email:
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