Part 1 of this series described how network-side QoE (Quality of Experience) measurement is fundamental to proactively assuring the quality of OTT services. At its core, the network-side can be an early warning system for QoS, which in turn correlates to actual QoE performance. This article considers the two types of network monitoring available to us, relative priorities for the points of measurement, and how the video platforms contributing to OTT services are evolving to support OTT quality at scale.
This is the second instalment of our deep dive into the rapid growth of OTT, high user expectations and the developments in hybrid systems which combine CDN with storage and distributed processing to meet demand.
In real systems the issue of sampling rate conversion arises frequently but fortunately there are plenty of solutions.
Broadcasting video and audio has rapidly developed from the send-and-forget type transmission to the full duplex OTT and VOD models in recent years. The inherent bi-directional capabilities of IP networks have provided viewers with a whole load of new interactive viewing possibilities.
Successful microphones have been built working on a number of different principles. Those ideas will be looked at here.
The features we love about OTT services – such as combined linear and on-demand content, multi-device viewing mobility, tailored viewing experiences, and in some cases better resolutions – are driving the general rapid uptake of OTT services.
TV engineers are always busy behind the scenes, monitoring and maintaining technical quality to make the station and those in front of the cameras sound and look their best, and thinking of ways to make it better.
It should constantly be borne in mind that although digital audio is a form of data, those data represent an audio waveform and there are therefore some constraints on what can and cannot be done to the data without causing audible impairment.