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SMPTE Meetings and Conferences ( October 2008)
[ACTIVE]

Compatibility of 48 and 24Hz Motion Images: A Problem and a Solution

Metadata

Publisher
SMPTE — White Plains, NY
Doc Type
Conference Paper
Content Type
Original Research
Volume
2008, No. 1, pp. 1–9
Abstract
Shortly after a soundtrack was added to 35mm film in the late 1920s, 24Hz was established as the standard frame rate for sound films. However almost since the ink was dry on that standard, many people on both the technical and creative sides of the industry have lamented that selection as being barely adequate to depict motion properly. As part of their training, cinematographers have to learn how quickly they can move the camera without destroying the illusion of motion<sup>1</sup>. Frequently directors have to limit how fast a person or an object moves within a scene for the same reason. It has almost become standard practice for any extremely fast action to be represented in slow motion. For example an explosion will invariably be shown slowed down, likewise a car crash, or even a boxer's punch. This has become part of the standard “cinematic language” such that moviegoers don't question or even notice the practice. But the reason it's done is more rooted in the technology and human psychophysics than the storytelling art – a frame rate of 24Hz isn't really adequate to properly display anything beyond minimal movement. 24Hz is fine for a scene with people simply talking to each other, however almost any kind of “action” scene must either be presented in slow motion, or be carefully staged so the successive movement of objects within the scene from one frame to the next isn't so great that the illusion of motion breaks down.
Publication Date
2008-10-01
DOI
10.5594/M001050
Link
https://doi.org/10.5594/M001050
Author(s)
David Richards
Copyright
© 2008 Society of Motion Picture and Television Engineers, Inc.

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David Richards; Compatibility of 48 and 24Hz Motion Images: A Problem and a Solution, SMPTE Meetings and Conferences ( October 2008); SMPTE, 2008. Available at https://doi.org/10.5594/M001050
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David Richards; Compatibility of 48 and 24Hz Motion Images: A Problem and a Solution, SMPTE Meetings and Conferences ( October 2008); SMPTE, 2008. Available at https://doi.org/10.5594/M001050

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David Richards; Compatibility of 48 and 24Hz Motion Images: A Problem and a Solution, SMPTE Meetings and Conferences ( October 2008); SMPTE, 2008. Available at https://doi.org/10.5594/M001050
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<span class="citation">David Richards; <cite>Compatibility of 48 and 24Hz Motion Images: A Problem and a Solution</cite>, SMPTE Meetings and Conferences ( October 2008); SMPTE, 2008. Available at <a href="https://doi.org/10.5594/M001050" target="_blank" rel="noopener">https://doi.org/10.5594/M001050</a></span>

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Preview:
David Richards; Compatibility of 48 and 24Hz Motion Images: A Problem and a Solution, SMPTE Meetings and Conferences ( October 2008); SMPTE, 2008
doi: 10.5594/M001050
url: https://doi.org/10.5594/M001050
Snippet:
<li>
David Richards; <cite id="bib-10-5594-m001050">Compatibility of 48 and 24Hz Motion Images: A Problem and a Solution</cite>, SMPTE Meetings and Conferences ( October 2008); SMPTE, 2008
<span class="doi">10.5594/M001050</span>
</li>