With the advent of digital video, the people in the middle of the broadcast chain have little do to with colour for the most part. Yet those in post production, acquisition and decoding/display are finding it life more and more difficult as we continue to expand colour gamut and deliver on new displays.
Google’s Steven Robertson takes us comprehensively though the challenges of colour from the fundamentals of sight to the intricacies of dealing with REC 601, 709, BT 2020, HDR, YUV transforms and all the mistakes people make in between.
An approachable talk which gives a great overview, raises good points and goes into detail where necessary.
An interesting point of view is that colour subsampling should die. After all, we’re now at a point where we could feed an encoded with 4:4:4 video and get it to compress the colour channels more than the luminance channel. Steven says that this would generate more accurate colour than by stripping it of a fixed amount of data like 4:2:2 subsampling does.
Given at Brightcove HQ as part of the San Francisco Video Tech meet-ups.
This webcast will focus on the fundamentals of colour science as it relates to the motion picture and television industry and then explore how we can take advantage our visual system for improved visual quality.
The webcast covers:
In this Tech Talk we shall hear from researchers and vision scientists, how they are ensuring the precision of HDR and colour in image capture.
Today’s imaging technology strives to produce a viewing experience which is, as far as possible, identical with that perceived by the human visual system. Strangely, one limiting factor in high dynamic range (HDR) design has been that existing measurements of the human vision have not been sufficiently accurate. Another of these issues is skin tone: humans are particularly sensitive to skin colour – regarding it as an indicator of well-being. The accurate portrayal of this subtle parameter is therefore particularly important. A further interesting image quality issue is slow motion – here we explore the development of an 8K UHD 240fps camera and slow motion capture and replay server.
Vimeo’s Vittorio Giovara discusses ways to improve viewer retention by improving videos paying attention to colour space and colour volume. This talk covers how and why High Dynamic Range (HDR) works, Wide Color Gamut (WCG), 10-bit vs 8-bit video and also discusses the importance of frame rate on viewer retention.
After all, 4K has gotten most of the headlines, but there are other ways to improve the quality of your streaming video that have even more visual impact. This talk explores video colorimetry, ranging from video quality concepts to the latest trends in the industry. Vimeo’s experience is used as a practical implementation example and showcases how new compression technologies are deployed for the benefit of creators and their audiences.
This isn’t just about pretty videos, Vittorio shows the economic benefits of producing a better product.