72 OPINION QUALITY OF
As display and camera technologies evolve, video standards progress as well, offering a higher visual quality and sense of presence. The UHD format offers improvements across several image modalities: higher resolution and frame rate, an increased dynamic range (HDR) allowing for a better representation of light, as well as a wider colour gamut. Each of these dimensions improves the quality of the viewer’s experience (QoE) but also comes at a significant cost in terms of bandwidth and energy. For instance, moving baseband video from 1080p to 4K resolution requires an approximate 300% increase in bandwidth. Frame rate increases might be less costly as it is usually considered to ‘only’ double it, but a 100% increase is still required. Not all image modalities are made equal, however: the UHD Forum notes that moving from SDR to HDR only requires a 25% bandwidth increase, with relatively modest
infrastructure changes when compared to a 1080p to 4K transition. So what is the answer to this tradeoff between QoE and cost, whether it is expressed in terms of energy or bandwidth? Should we abandon efforts to improve visual quality?
“Moving baseband video from 1080p to 4K resolution requires an appproximate 300% increase in bandwidth”
The answer may not be so negative.
Different image modalities have a more or less important impact on QoE. Studies have shown that viewers prefer a higher frame rate over an increase in resolution, for instance, and similar observations can be made when comparing an increase in dynamic range relative to resolution: HDR at 1080p is found
CLOUD EXTENSION LAUNCHED FOR MAGELLAN Imagine Communications BY ADRIAN PENNINGTON
Launching at IBC, Magellan Connect is an extension to the Magellan Control System that enables the broadcast routing control platform to manage signals in ground-to-cloud applications. According to Imagine Communications, the new product leverages established encoding and secure delivery techniques for signal transport along the ground/cloud signal path. Integrating with AWS MediaConnect and TechEx MWEdge endpoints, Magellan
Connect creates an end-to-end routing environment allowing simple “single-take routing” to connect signals, regardless of whether they are on-prem or in-cloud. John Mailhot, CTO of Infrastructure, Imagine
EXPERIENCE AND ITS ENERGY IMPACT
Tania Pouli, Deputy Manager, Advanced Media Content lab, b<>com
more visually appealing relative to SDR at 4K. Motivated by these observations, tech
provider b<>com proposes solutions that facilitate the transition towards new, more immersive image modalities, while keeping in mind their energy and bandwidth impact. The b<>com Sublima conversions allow for a seamless transition towards HDR, with minimal workflow and equipment changes. Moving a step further, the new b<>com Wisdom allows for an improved visual experience while reducing overheads: by considering the characteristics of the video, unnecessary frames can be removed with no QoE reduction, offering important gains in storage and bitrate requirements. Achieving enhanced QoE without
compromising energy efficiency is possible, and b<>com’s innovative solutions show how. 2.B39
Communications, said: “Imagine recognises that the mix of ground and cloud is subject to individual economic and operational considerations. With the launch of Magellan Connect, we’re helping our customers leverage the benefits
Imagine is extending its broadcast routing control system into the cloud
of on-prem and cloud, maintain a consistent operational approach and transition at a pace that works with their business.” Already well-established for facility routing, Magellan Control is compatible with SDI, SMPTE ST2110, VSF TR-08 JPEG XS and MPEG-2 TS signals. Magellan Connect extends these capabilities to the cloud, incorporating intelligent path-sharing and switching functions so that, operationally, the cloud and ground act the same and have access to the same sources and destinations.
2.A17, 2.A15,
1.BS9
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