OPINION: 8K resolution? It’s all in the detail

Peter Knight considers the impact of the 8K resolution revolution — will it affect the way that we project digital cinema any time soon?


WALKING AROUND IBC last September you couldn’t fail to notice the vast array of televisions on display all capable of showing 8K resolution, some at 120fps. I could walk out of a Curry’s electrical store today with a brand new 55in Samsung 8K television for less than £2,500, For a few more thousands, a selection of 80in+ models is available. All come with HDR or HDR10+ options on top, and several feature Dolby Atmos too. That may not be super-cheap, but the technology is readily available.

The Consumer Technology Association forecast that US sales of 8K UHD TVs would reach 175,000 units in 2019. Though IHS Markit downwardly adjusted its own estimates for 2019 8K television sales from 430,000 to 167,000 units, it still represents a growth in sales. The variety of 8K models available and being reviewed is fast-approaching the number of 4K ones. Some contend 8K will be a mainstream consumer product by 2023.

Content is king — and this has been part of the challenge of 4K, with relatively few cinema features released in 4K, despite the availability of 4K projectors for over a decade. YouTube has supported the upload of 8K videos since 2015, with Vimeo adding 8K support in November 2017. As we went to press, it had 8,000 videos tagged with 8K.

While content is still scarce, it is appearing gradually. At the end of 2019 the rugby world cup was broadcast in Japan in 8K, and this year’s Olympics Games will be available in 8K. And just recently we also saw an announcement of a new 8K certification scheme for televisions from the 8K Association designed to create a standardised feature set for 8K displays.


The resolution revolution?
In the non-cinema entertainment space, 8K projectors are already available, with Digital Projection unveiling one in 2019. Museums, attractions, event and projection mapping are all making use of the higher resolution. So with all of this 8K activity happening in other professional environments, let alone in the home, where does this leave cinema? Should the projectors in cinemas ramp up to 8K or even 16K to compete?

Whenever I raise the topic at different technology firms in our sector, the response has been unequivocal — there isn’t the content. Despite having 4K projectors, not many movies are released with a 4K DCP. That said, I certainly have heard some suggesting that 8K is not an impossibility in cinema’s future.

In the realms of on-demand and streaming services, there 4K content is being widely consumed, much of which now also has HDR available with it. But even higher resolution with higher dynamic ranges and faster frame rates all means larger file sizes. Larger file sizes mean a greater requirement for storage space, more processing and more network capacity, much like squeezing an eight lane-highway into a small country road. The jump to 8K is 16 times that of standard HD. So in a world of hard-pressed bandwidth, cinema may well have a role to play as venues capable of handling robustly the demands of 8K technology. One final thought — the optimal viewing distance for that 55in 8K TV set at Currys? Just under 2ft. I don’t know about you, but I sit a bit further back. As a rule, bigger screens deliver better resolution more comfortably.

What is the conclusion? 8K is reaching our world — it may be worth considering where and why it sits in our cinemas.


About Peter Knight

Peter Knight is the Commissioning Editor for the Cinema Technology Magazine, along with the Managing Editor for the Mad Cornish Projectionist website. He is still a working projectionist and AV technician with an interest in all things projected both in traditional cinema and elsewhere too. Peter has been running his own business since 2017.

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