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In this series of articles, we will explain broadcasting for IT engineers. Television is an illusion, there are no moving pictures and todays broadcast formats are heavily dependent on the decisions engineers made in the 1930’s and 1940’s. Understanding broadcast video and audio is a lesson in history and backwards compatibility, and to a certain extent, the two are inextricably entwined.
Away from traditional broadcasting a revolution is happening. Live internet streaming is taking the world by storm with unprecedented viewing figures and improved accessibility for brands looking to reach better targeted audiences. The Live Explosion, hosted by the DPP in London and enabled by Dropbox, presented three live streaming experts to share their experience of this new phenomenon.
A quick look at the lens to display pipeline highlights some trivial-seeming bottlenecks that place important constraints on motion imaging systems. One of these is the connection to the consumer display. The announcement of HDMI 2.1 is key to advancing to 4K and beyond, with additional support for HDR, and increased frame rates for UHD video.
Television remote controls used to be simple devices; channel up, down, volume up, down and power on, off. Today, a television remote control may have 50 or more functions. Yet, viewers seldom use more than a few of those capabilities because they do not understand what the buttons do. Better remote control design is the solution.
Migration towards ST 2110 and ST 2022-6 video networks for production and content delivery is picking up pace as the advantages of IP versus traditional SDI over coaxial cable carriage become more evident. The key drivers of IP include the introduction of more flexible and scalable business models based on virtualization and cloud technologies, along with the economies of scale and speed of technology development that stem from the use of commercial off-the-shelf (COTS) IT equipment.
Metadata is well known to hold the keys to good user experiences by making content readily searchable and enabling more compelling or relevant recommendations, but has been held back by limited depth and need for laborious manual production.
The Digital Video Broadcast (DVB) has added final revisions to its first DVB UHD-1 specifications for Ultra HD covering transport of UHD services over IP networks. This comes just over a year after the DVB Project approved the underlying standards in October 2016 as UHD-1 Phase 2 (TS 101 154) for broadcast networks.
4K imagery has become the quality standard for many broadcast applications. A key requirement is that the transmission links be of sufficient bandwidth. Links using H.264 can be overwhelmed by the much higher bandwidth requirements of 4K video. HEVC is often the better solution. How does it work and what are some benefits?
