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ASK THE EXPERTS 4k testing in today’s world with Adam Schadle, Video Clarity W ith the need to ingest and process video from a number of sources, broadcasters are faced with a multifaceted need to handle all types of formats including 4k. What is your multi-resolution strategy? With the emergence of new compression standards such as High-Efficiency Video Compression (HEVC), which offers a potential bit- rate reduction of up to 50 percent over H.264, 4k services are looming on the horizon. Broadcasters and service providers are now researching the technology requirements of delivering 4k content to a wide range of services: real-time TV channels delivered through cable IPTV or satellite, file- based delivery of VOD content, and streaming content over the Internet. The ability to test and analyze video quality remains as critical as ever, but the task will be complicated by efficient encoding standards that enable additional channels over the same or smaller data rates. At Video Clarity, we’ve always been proactive about delivering video quality testing and analysis tools to support any current and emerging formats our clients require, and 4k is no exception. Our core capabilities are based on the notion that testing and QC must take place not only after the content goes live, but before, with testing tools that 58 | TV-BAY MAGAZINE: ISSUE 86 FEBRUARY 2014 can ingest video from any source and then play it back in every resolution for delivery to every screen. When dealing with 4k files, streams, and uncompressed video, what capabilities need to be present in a testing solution? The most important capability is the ability to ingest, record in 4k resolution, and test content from any compressed or uncompressed video source using today’s SDI-type interfaces. This is including signals coming from IP network, file, or uncompressed video infrastructure feeds. This also includes files from the editing suite, such as multiple frames of uncompressed sequences of any length, or lightly compressed mezzanine-level files. A secondary requirement is the ability to decode any encoded file in the current MPEG or JPEG standards as well as emerging encoding standards such as HEVC. Finally, the system must be able to play back the content in every resolution required for delivery to every screen, from UHDTV and HDTV to mobile device resolutions. Video Clarity provides the testing and monitoring foundation that can handle a large array of original file formats, with the ability to record and play back content up to 60Hz. It’s what we do and do well. What types of streams are being propagated in current delivery networks that need to be part of the type of testing a broadcaster/network might do?