One of the key issues in remote IP production is ensuring signal synchronization. Traditionally, IP media architectures use Precision Time Protocol (PTP) to distribute timing data from a grand master clock to all network devices. While effective on a local area network, transferring PTP over uncontrolled or remote networks is challenging, often requiring extensive engineering and leading to increased latency.

The Concept Behind MRTC

Sergio Ammirata, Ph.D., founder and chief scientist at SipRadius, explains the concept behind MRTC. He emphasizes that in remote production (REMI) scenarios, synchronization down to the millisecond level is sufficient, as opposed to the nanosecond precision required by grand master clocks. Instead of trying to maintain synchronization with a single grand master clock across all locations, MRTC allows for the creation of a local PTP or NTP at each site, utilizing readily available time sources like partial-GPS and cellular networks.

Features of the MRTC Device

The MRTC device is a compact and cost-effective media router and access gateway. It accepts IP signals from remote locations and employs a stable protocol such as MPEG-TS over RIST for signal transmission. The device features inputs for a GPS antenna and a cellular SIM card, enabling it to generate accurate timecode locally. MRTC also facilitates PTP/NTP synchronization with other devices in the network, effectively acting as a Master Clock for remote networks.

Simplifying IP in Live Broadcasting

Sergio Ammirata notes that the concept of local PTP grand masters may seem unconventional, but it offers a practical and easy-to-implement solution for live broadcasting. By making MRTC the I/O device and PTP/NTP grand master, one can address a significant challenge in IP-based live broadcasting.

Specifications and Additional Capabilities

The MRTC is a standalone device measuring 115 mm x 108 mm x 39 mm and is compatible with common IP transmission formats and protocols. In addition to its media routing capabilities, it functions as a full-fledged router with multiple ISP support, firewalling, tunneling, and port mapping features. According to Sergio Ammirata, only one device is required to connect to the Internet and begin streaming.

MRTC at IBC2024

Attendees of IBC2024 will have the opportunity to see the MRTC in action, along with SipRadius’s range of ultra-low latency and highly secure encoding, transport, delivery, and visualization platforms.