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SMPTE Meetings and Conferences ( October 2023)
[ACTIVE]

Reducing Cinema Projectors Power Consumption using Global Dimming and Image Statistics

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Conference Paper
Content Type
Original Research
Volume
2023, No. 10, pp. 10–12
Abstract
Digital cinema projectors illuminate giant screens, offering audiences the best immersive and social experience. Thanks to design improvements and full RGB laser light sources, recently released cinema projectors consume much less power and have a lower cost of ownership than previous generation systems. However, ongoing rise in energy costs still challenges the sustainability of commercial theaters. — To improve the power efficiency of displays, global dimming features are now being implemented in many consumer TVs and projectors. Global dimming of a display's light source not only leads to power savings but also improves the black level in scenes with limited bright features. Depending on the implementation, Global Dimming can either faithfully reproduce any content or trade accuracy for increased power savings. — In this article, we simulate the expected power savings of Global Dimming in cinema under various scenarios. Results show that limited power savings is to be expected when the input content is faithfully reproduced. Enabling the rendering of a limited number of pixels (using a percentile) greatly increases the power savings at the risk of creating visual artifacts. Combining limited rendering with refreshing dimming only at shot intersection seems to be the most promising approach, as it enables significant power savings while maintaining artifact-free rendering. Despite these promising results, implementing such an approach faces several workflow and distribution hurdles that need to be solved. Combining global dimming and lightsteering technology, where light can be used much more efficiently, could lead the way to significant power savings for exhibitors.
Publication Date
2023-10-16
DOI
10.5594/M002025
ISBN
Print: 978-1-61482-964-5
Link
https://doi.org/10.5594/M002025
Author(s)
Ronan BoitardBarco
Nusrat MehajabinBarco
Anders BallestadBarco
Gerwin DambergBarco
Keyword(s)
Power Consumption, DCinema, Global Dimming
Copyright
© 2023 Society of Motion Picture and Television Engineers, Inc.

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Ronan Boitard, Nusrat Mehajabin, Anders Ballestad, and Gerwin Damberg; Reducing Cinema Projectors Power Consumption using Global Dimming and Image Statistics, SMPTE Meetings and Conferences ( October 2023); SMPTE, 2023, ISBN: 978-1-61482-964-5. Available at https://doi.org/10.5594/M002025
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Ronan Boitard, Nusrat Mehajabin, Anders Ballestad, and Gerwin Damberg; Reducing Cinema Projectors Power Consumption using Global Dimming and Image Statistics, SMPTE Meetings and Conferences ( October 2023); SMPTE, 2023, ISBN: 978-1-61482-964-5. Available at https://doi.org/10.5594/M002025

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Ronan Boitard, Nusrat Mehajabin, Anders Ballestad, and Gerwin Damberg; Reducing Cinema Projectors Power Consumption using Global Dimming and Image Statistics, SMPTE Meetings and Conferences ( October 2023); SMPTE, 2023, ISBN: 978-1-61482-964-5. Available at https://doi.org/10.5594/M002025
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<span class="citation">Ronan Boitard, Nusrat Mehajabin, Anders Ballestad, and Gerwin Damberg; <cite>Reducing Cinema Projectors Power Consumption using Global Dimming and Image Statistics</cite>, SMPTE Meetings and Conferences ( October 2023); SMPTE, 2023, ISBN: 978-1-61482-964-5. Available at <a href="https://doi.org/10.5594/M002025" target="_blank" rel="noopener">https://doi.org/10.5594/M002025</a></span>

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Preview:
Ronan Boitard, Nusrat Mehajabin, Anders Ballestad, and Gerwin Damberg; Reducing Cinema Projectors Power Consumption using Global Dimming and Image Statistics, SMPTE Meetings and Conferences ( October 2023); SMPTE, 2023, ISBN: 978-1-61482-964-5
doi: 10.5594/M002025
url: https://doi.org/10.5594/M002025
Snippet:
<li>
Ronan Boitard, Nusrat Mehajabin, Anders Ballestad, and Gerwin Damberg; <cite id="bib-10-5594-m002025">Reducing Cinema Projectors Power Consumption using Global Dimming and Image Statistics</cite>, SMPTE Meetings and Conferences ( October 2023); SMPTE, 2023, ISBN: 978-1-61482-964-5
<span class="doi">10.5594/M002025</span>
</li>