There are many benefits to a file-based workflow. One of those is the ability to automatically check video for a laundry list of errors and if the file meets compliance specifications. It is important to understand what can and cannot be properly measured in file-based content with today’s automatic QC and test-and-measurement tools.
In the fourth season of 'Bruce's Shorts', Bruce Devlin takes a look at the Interoperable Master Format (IMF). In this episode he answers the question, How do you QC IMF?.
IMF is made up of many components. But, how does one QC an IMF file in a file-based environment and why is it necessary? Is there an official checklist?
In Part 4 of his series about IMF, “How do you QC IMF?” Devlin walks readers through the primary QC processes.
If you missed any of the previous tutorials about IMF, their links can be found below:
Bruce‘s Shorts | 4.1 - Why does IMF exist?
Bruce‘s Shorts | 4.2 - What is an IMF IMP?
Bruce's Shorts | 4.3 - What is an IMF CPL?
To see more of Bruce Devlin’s video tutorials, simply do a search for “Bruce’s Shorts” on The Broadcast Bridge website.
Video and audio bring a new dimension to monitoring for the IT department. Not only are we concerned with how to measure aspects of the video and audio signals, we also must analyze the time it takes for an IP packet to arrive at a destination, and the variance of all other packets in the stream. If they take too long to be delivered, then the receiver will drop them from the decoding buffer, which causes signal corruption.
IT networks use packet analysis tools such as Wireshark to look closely at the packets, and IPerf is used to find absolute maximum data rates of network links. Learn more about this and the measurement process in Tony Orme’s tutorial, “Understanding IP Networks - Packet Delay Monitoring.”
Tony Orme has posted almost 30 additional tutorials in his on-going training series on The Broadcast Bridge website. They can be found by searching for “Tony Orme” in the homepage search box.
See us at the 2017 NAB Show
Stop by The Broadcast Bridge booth #N5713 at the 2017 NAB Show. Sign up for a free subscription to receive a daily, weekly or monthly custom email filled with content and technology that you select. Don’t wait for an out-of-date, month’s-old version print copy of “breaking events,” sign up today.
You might also like...
Superficially, level seems to be a simple subject: just a reading on a meter. In practice, there’s a lot more to it. Level matters because if it is wrong, sound quality can suffer, things can get damaged or cause…
Here we look at one of the first practical error-correcting codes to find wide usage. Richard Hamming worked with early computers and became frustrated when errors made them crash. The rest is history.
Microservices enable broadcasters to find new ways to adopt, engineer, operate and maintain the value of their solutions. For vendors, microservices provides opportunities to offer what could essentially be a self-serve menu for clients rather than building bespoke workflows internally.…
Error correction is fascinating not least because it involves concepts that are not much used elsewhere, along with some idiomatic terminology that needs careful definition.
Errors are handled in real channels by a combination of techniques and it is the overall result that matters. This means that different media and channels can have completely different approaches to the problem, yet still deliver reliable data.