So far in this blog series, we’ve examined the importance of PTP-aware switches in an IP environment, as well as correct handling of Precision Time Protocol (PTP) data to ensure proper timing and synchronization. In this third post, we look at networking and transport — the actual movement of video, audio, data, control, monitoring, intercom, and other signals over the IP network.
The first blog in this “lessons learned” series took a close look at how important it is to use a PTP-aware switch when implementing IP-based media workflows. In this second installment, we’ll focus more on IEEE 1588 Precision Time Protocol (PTP) itself and how to handle PTP configuration and data correctly.
At a recent meeting of Artel engineers, we decided to collect some “lessons learned” stories. We figured we’d share these stories — focused around IP-based media workflows — in case they can help you to prevent unwanted downtime or avoid a painful failure.
In the 15 years since he founded FiLO Classical, recording engineer Dave Rowell has consistently garnered praise — and no small number of awards — for his artistic and technical skill in location recording and broadcasting classical music. Read how Rowell adopted a RAVENNA-based real-time AoIP solution including two Artel Quarra PTP- aware ethernet switches to keep everything perfectly synced.
Artel's documentation page has dozens of PDF files explaining how best to configure your equipment for your operations. Page through any guide, and you’ll learn exactly what to do to get you up and running. Simple and helpful screenshots allow you to get through setup quickly and successfully without necessarily understanding every switch feature so you’re pretty much good to go. But maybe you’re interested in the “why” as well as the “how”? This blog takes a closer look at three key features — IGMP snooping, QoS, and IEEE 1588 PTP — and why they are important in supporting a stable AES67 network.
The industry has been talking about remote production for a while, and for good reason. The conventional live production model, in which you send a team and equipment to the venue, can be costly in terms of both time and money. Travel is expensive not only because you need to pay for transportation and lodging, but also because the human and technical resources are tied up all that time and unavailable for any other production. As a result, you’re limited in the frequency and number of events you can produce.
Artel Releases New Precision Timing Protocol White Paper. ‘Time Travels – A Closer Look at PTP’ examines the key elements and considerations of PTP deployments including PTP synchronization, master clock selection, transparent and boundary clock functions, PTP domain and profile configuration, and other network considerations.
With the transition to IP networks for all aspects of the signal processing path, accurate timing becomes more difficult, due to the fundamentally asynchronous, non-deterministic nature of packet-based networks. With Ethernet networks, which are inherently bi-directional, it is possible to distribute a common time signal using IEEE 1588 Precision Time Protocol (PTP) to every device without a separate overlay sync network. Each device can then accurately synchronize its internal clock to a single master clock which can then be used to accurately achieve media signal synchronization by means of the SMPTE Epoch.
As IP video and audio technology moves rapidly into the domain of IP networking, IEEE-1588 Precision Time Protocol has become essential to all facets of media production. The primary use of PTP in these standards permits hundreds and even thousands of devices to work together in absolute synchronization to provide a stable time base that can be used to synchronize video, audio and other signals so that they can be processed easily and delivered to local and remote audiences. Learn more about it's applications.
As IP video and audio technology moves rapidly into the domain of IP networking, IEEE-1588 Precision Time Protocol has become essential to all facets of media production. This fundamental enabling technology permits hundreds and even thousands of devices to work together in absolute synchronization and support all the timing relationships that are so critical to properly formatted media signals. Network infrastructure, including Ethernet switches and other devices will need to natively support PTP functions. Learn more about PTP system components.