NEW YORK—The live sports broadcasting industry is grappling with a significant technological shift. Productions are becoming larger and more complex, and the demand for wireless cameras has outpaced the capabilities of traditional microwave RF systems that operate on increasingly crowded and limited frequency spectrums.
There’s a constant challenge to efficiently broadcast content wirelessly, which has created a strong industry-wide push to find viable next-generation solutions like 5G. All the traditional solutions still perform well, but when Sony demoed for us its 5G-powered live remote-production offering, comprised of a CBK-RPU7 encoder paired with the PDT-FP1 portable data transmitter and the NXL-ME80 media-edge processor to achieve ultra-low latency, our reaction was, “Why wouldn’t we look at it?”
Low Latency, High Quality
Sony’s solution presented an option offering ultra-low latency and high video quality, plus the ability to send back return video and control the camera and tally.
We’re always limited on the amount of RF cameras we can run on a large-scale event—at a golf major, we typically have around 120 cameras. Over the last four or five years, we’ve been creating one giant camera-control network. If we have six different trucks, the person physically shading cameras can be there, or we can extend the network to New York and have somebody paint it from there.
Our teams have also started virtualizing RF camera control with Sony Camera Control Network Adapters (CNAs), which show up as just another CCU on the network. Now, even if we have 25 video operators, they can be anywhere, in any truck, controlling anything. Having another Sony device on the system allows us to add control to the network more easily.
It’s important we continue to look for ways to transmit more content using the same number of frequencies available. Spectrum is in short supply, so being able to leverage new transmission technology is certainly an advantage, and 5G is obviously, for now, the next solution.
Typically, public networks are specified at about 80% allocation for download and 20% for upload, making it difficult to stream higher bit rates—we need much higher upload bandwidth to transmit live video reliably and smoothly. The video quality and low latency achieved through Sony’s 5G encoder are production-ready and comparable to wired fiber, making it a viable option for primary broadcast cameras.
We’ve even done side-by-side tests of the 5G feed against hard-wired fiber feeds, revealing minimal differences in quality and latency. The video quality from Sony’s 5G encoder was so high when compared to a wired fiber camera that we often could not tell the difference, even when using a high-grade broadcast monitor.
Public 5G Slicing
Production always wants more RF—that’s one of the biggest requests at major events. While private 5G networks provide excellent, dedicated bandwidth, deployment is still challenging enough to warrant further simplification for broader adoption. The potential for carriers to offer guaranteed bandwidth (slicing) on public 5G networks could be the next necessary step towards simplified deployment. Plus, the availability of a public 5G slicing option means you don’t always have to deploy a completely separate 5G system.
Even if there is some trade-off between robustness, latency and quality, it’s worth it for the ability to get more coverage easily and over a large area. The future of wireless broadcasting, at least for the near term, is likely a hybrid model with traditional RF cameras supplemented by 5G cameras placed in strategic locations or in areas difficult to reach with other technologies.
We’re definitely rounding the corner, and as we do, it will be this 5G-powered remote production technology’s time to shine.
More information is available on Sony’s professional products website.
Craig Stevens has been in the broadcast industry since 1998, working as a freelance video engineer before joining CBS in 2015. He is vice president of remote engineering at CBS Sports.
