Video: A Subjective Comparison of Broadcast and Unicast Transmission Impairments

Encoding at a high quality is only part of the equation for delivering a great experience to your viewers. When something goes wrong, the way viewers feel is just as important and then when it’s going right.

In this talk, Brahim Allan from British Telecom talks is through their experiment finding out how people felt about various different types of video impairment and the various sizes of screen now available on smart phones, tablets and, of course, TVs.

Brahim explains that they compared errors associated with broadcast and multicast delivery which appear as areas of extreme color or tearing of the image, with errors associated with Adaptive Bit Rate unicast, such as interruptions and quality variations. Interruptions were the most annoying impairment and interestingly young students have similar views to the adults.

Watch now for the full results!

Speakers

Brahim Allan Brahim Allan
BT

Video: Per-title Encoding at Scale

MUX is a very pro-active company pushing forward streaming technology. At NAB 2019 they have announced Audience Adaptive Encoding which is offers encodes tailored to both your content but also the typical bitrate of your viewing demographic. Underpinning this technology is machine learning and their Per-title encoding technology which was released last year.

This talk with Nick Chadwick looks at what per-title encoding is, how you can work out which resolutions and bitrates to encode at and how to deliver this as a useful product.

Nick takes some time to explain MUX’s ‘convex hulls’ which give a shape to the content’s performance at different bitrates and helps visualise the optimum encoding parameters the content. Moreover we see that using this technique, we see some surprising circumstances when it makes sense to start at high resolutions, even for low bitrates.

Looking then at how to actually work out on a title-by-title basis, Nick explains the pros and cons of the different approaches going on to explain how MUX used machine learning to generate the model they created to make this work.

Finishing off with an extensive Q&A, this talk is a great overview on how to pick great encoding parameters, manually or otherwise.

Watch now!

Speaker

Nick Chadwick Nick Chadwick
Software Engineer,
Mux Inc.

Video: Video-Evaluation Best Practices: Testing & Optimisation Techniques

In this webcast, AWS Elemental dives into a topic other companies don’t discuss: The video encoding techniques some vendors use to sway judgment during proof-of-concept demos.

Improve your discerning eye and your analysis acumen, and obtain essential knowledge:

  • Methods and best practices for evaluating video quality
  • Examples of scenes which look totally different, but have the same metrics score
  • Important considerations for accurate evaluation of video results
  • Subjective vs. Objective results
  • How encoder settings affect output and how you can fine tune them for the best results
  • What is Adaptive Quantization and how can it improve your video output quality
  • Encoding techniques that impress in shootouts but might not be practical in production

Video encoding comparisons should inform, not fool. Learn what you need to know, before you start the process.

Speakers:

Dan Gehred Dan Gehred
Solutions Marketing Manager for Compression, AWS ElementalDan Gehred, Solutions Marketing Manager for Compression at AWS Elemental, is responsible for product marketing for all compression software products. Dan has over 15 years of experience building and marketing digital media applications.
Dan Germain Dan Germain
Sr. Product Manager Compression – VOD, AWS ElementalWith over 30 years of industry experience in the international media marketplace, Dan is passionate about technology, developing new standards, promoting positive change and business approaches to enhanced profitability.