Displays & Screens Part 3
Post categories: Christmas Lectures,ÌýQuentin Cooper,Ìýinterview,Ìýmedia,Ìývideo
| 12:10 UK time, Friday, 29 January 2010
We're very happy to present the final part of Quentin's interview with Richard Salmon eploring the 91Èȱ¬'s research and expertise in display screens for television.
In this final section they look at the role of of Hi Definition screens and the large screens needed to watch them. Different technologies, their relative merits, and future developments are covered too.
In this final section they look at the role of of Hi Definition screens and the large screens needed to watch them. Different technologies, their relative merits, and future developments are covered too.
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Comment number 1.
At 30th Jan 2010, HD wrote:LCD TVs with locally dimming LED backlights weren't mentioned, or laser TV. It would have been good for estimated timelines of when we will seen the new screen types eg. OLED/Laser available in shops.
I thought he might talk about higher frame rates but maybe that will be in another blog. Also, with the big release of 3D displays this year, shouldn't they be capable of accepting twice the frame rate in 2D (at least in theory? eg. a 100hz tv (intended for shutter glasses viewing) receiving what it thinks is 50p stereoscopic should display left then right - if these were really twice the fps it could show twice the fps video, though 200hz TVs probably wouldn't (since they would be flipping between left & right twice for each 50hz frame?)
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Comment number 2.
At 3rd Feb 2010, Ant Miller wrote:Hi all, Richard Salmon and I have discussed a few points arising from comments on his video, and he passes on these notes which we hope will answer some, if not all, the queries from the commenters:
Concerning HD1080's comment about frame rates, my view is that there may eventually be a divide between "Film-style" shooting as an artistic art-form, and future "television" systems which become more lifelike and realistic, with higher static and higher dynamic resolutions, and possibly 3D. The decision to shoot at 25p is an artistic one. HD at 150Hz would not just be a question of how you shoot, it requires a change in the entire signal chain from camera, through production, through transmission to the home, so it's a new system, the next generation of TV. So our work in this area is really thinking about what comes after HDTV, probably 15-20 years away, not how to 'improve'
current HDTV. The Japanese are already trying to agree international standards for what comes next, so if we want to influence that, we have to do the basic work now. Having said that, shooting HD at a higher frame rate now would enable some interesting freedoms for a production team to explore in post production, with the possibility of applying different "virtual shuttering" to different areas of the scene, for example.
Daveac's comment about the Sharp four-primary LCD is indeed timely - it hadn't been announced at the time I recorded that video, but I made a presentation at the UK Colour Group on the topic of four-colour displays back in 1993, which was based on earlier research work on multi-linear matrices undertaken some years before. Converting a three-colour signal to display well on a 4 primary display is not a trivial task, and if it is not done well can result in quite unfortunate (and surprising) differences in the appearance of an image from one viewer to another.
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Comment number 3.
At 3rd Feb 2010, Ant Miller wrote:Quick update- the 91Èȱ¬ has clarrified it's overall 3d policy possition so I attach it below.
“The 91Èȱ¬ isÌýconsidering a small number of 3DTV editorial experiments in the lead up to the 2012 Olympics. These experiments will be undertaken with editorial and technology partners to explore the creative potential of the new format, evaluate the different technology options and help us contribute to the standardisation process. We will publish more details of the programmes, genres and events to be covered by this work in due course. AsÌýis always the case with technological innovations,Ìý91Èȱ¬Ìýis committed toÌýexploring 3D developments in television on behalf of licence payers to examine how they mayÌýadd toÌýthe delivery of our public service objectives."Ìý
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Comment number 4.
At 4th Feb 2010, HD wrote:Will the 91Èȱ¬ 3D experiments involve shooting with multi-view with more than 2 views (at least 3) which would be better than stereoscopic?
Or other types of 3D or is the 91Èȱ¬s 3d experiments only about stereoscopic 3D?
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Comment number 5.
At 9th Feb 2010, Ant Miller wrote:Hi HD1080,
You're actually talking about a domain of technology that 91Èȱ¬ R&D is very active in. We've a number of current projects such as iView, Piero, i3Dlive, 3D4you and VSAR. All these can be found on the Production Research Section page on the web site.
/rd/projects/production.shtml
Cheers
Ant
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Comment number 6.
At 1st Mar 2010, HD wrote:Is the 3D4you project looking to create a "2D view + z depth" format (like the Phillips multi-view TV used to do that they've stopped making)?
If so, isn't it true that the 2D+depth map has limitations, apart from only being 256 depths, a 2D+depth map surely can't store things that are behind or partially behind something else - things that you would actually see from a slightly different viewpoint that multi-view is all about?
Couldn't the 91Èȱ¬ use a better format for storing multi-view data than one 2D view + a depth map?
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