40 TVBEurope Forum Channel in a Box
What QC capabilities are offered within CiaB systems?
Scott Rose, Miranda
technologies progress and capacity within units grows, this will be a business decision more than a technical one. Zdravkoski: Using our Genesix VideoServer, customers can run four entirely separate channels — each with one input and one output, including graphics, support for all codecs and H.264 streaming. Operating more channels means one gets a far more favourable price per channel.
Lugasi: Orad’s Blend should be considered like any other file- based video server and graphics template. Media files should QC similar to a standalone video server, graphics template should be uploaded to the engine and updated with relevant data. Putting both the video server and graphics engine in the same box does not change how the QC works. One of the safety features implemented in Orad’s Blend is the ability to validate all playlist events, and check media availability in the Blend storage when the clip is introduced to the playlist or the list updated, giving the operator time to prepare and locate missing media files. Mehring: Many systems don’t include QC because it is seen as
an upstream process. The approach we take is that material needs to be checked to ensure it does not cause a decoder failure when it comes to playout. For this reason we use a validation service to play in faster than realtime as soon as material arrives into the system. This allows rogue material to be quarantined and operational staff alerted to this exception. We also check the loaded schedule and alarm on media errors for problems such as
incorrect material start points, missing captions, subtitles, audio files and so on. Shell: The processing power
required for file-based QC is high and will impact the performance of CiaB, for which the primary function is realtime channel playout. Broadcasters should consider verifying and checking the technical compliance of content around its channels rather than from individual playout devices,
during, for example, the ingest process or directly on archive or NAS. Most CiaB systems do have a baseband review port that can be used for the manual QC of content. This can be especially useful in smaller systems where separated ingest capability does not exist. Tools that enable content to be reviewed over IP as opposed to baseband video will become important with the transition to all IP I/IO.
www.tvbeurope.com January 2014
Mat Shell, Harris
Sander ten Dam, Grass Valley
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