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Last updateThu, 21 Dec 2017 2pm

 

Introducing – Tools for Cinema Quality Assurance

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Cinema Test Tools for the non-Technical Manager – Post Installation Quality Assurance Has Begun

Cinema Test Tools is a free resource for the cinema industry, tuned most particularly for the non-technical manager. The tools include several DCPs, all with interesting means of testing the sound and picture quality for the interested by lightly trained staff. The lessons on sound and light are written to provide a foundation to communicate with the technician who must respond quickly and well to the information that they discover.

The key is a free Managers Walk Through Checklist that correlates with the many DCPs. It helps bring an understanding of the many nuances of the auditorium's situation in a straightforward way. 

HFR, New 'Silver Screen' and 2 Hobbit Projectors

HFR will finally be presented to a public audience during the Hobbit release in Wellington on 28 November. But that's not all.

They will see the movie with 12 foot Lamberts of light (what most of the world calls 41 candelas per square meter) courtesy of a dual projection system designed by Christie.

And, they will watch it on a newly introduced "polarization preserving screen" that was described at the October SMPTE meeting during a presentation by RealD. It is described as having no hot spot and 40 degrees of Half Gain Angle (HGA) on a 1.5 gain screen. To compare, the typical 'silver' screen used with passive stereoscopic 3D systems has an HGA of 23 degrees using a 2.5 gain screen. 

Lest it is forgotten, the technical reason for 'silver' screens is that they hold the polarization required for passive 3D systems. The gain comes for other reasons...like, not enough light to the eyes. But since most people in the cinema sit near or beyond the half gain line where the typical 3 or 4 ftL emission is already down to a mesopic 1.5 or 2 and growing progressively less, the HGA of 40 is phenomenal. If the center seats are actually seeing 12, those 20 degrees away will be seeing 6. (Of course, that brings up the topic of what the movie was mastered at, but we'll let that be a different article. Any volunteer authors?)

When the SMPTE Tech Event presentation papers are available, look for High Performance Polarization-Based-3D and 2D Presentation. For now you will have to be satisfied with the patent document: 

Analytics for US Patent No. 7,898,734, Polarization preserving front projection screen by Coleman, David A;Sharp, Gary D

The Christie PR on the dual projector set up is at the end of this article for download.

Here are some interesting articles on HFR (High Frame Rate): 

Beyond DCI – The Need for New D-Cinema Standards - Rajesh Ramachandran, CTO of Qube

Setting Standards for High Frame Rate Digital Cinema - Creative COW

Setting Standards for High Frame Rate Digital Cinema PART 2 - Creative COW

Variable HFR (High Frame Rate) Film Blog #1 | S3D Centre

Q&A ON HFR 3D Peter Jackson answers with some details on S3D48