A Recent Innovation in Digital Special Effects

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: The CBS Action Track system generates real-time multiple-image video of objects in motion using any normal color video source, live or prerecorded. Requiring neither special lighting nor special backgrounds, the system produces video depicting not only the present image of a moving object but also a selectable succession of earlier images commencing with a particular action. Utilizing the advantages of PCM-encoded video and digital random-access memory, Action Track obtains the intended effects: (1) by storing a reference field of video representing the scene at the start of the desired action; (2) by comparing picture elements of subsequently arriving video with those of the reference field; (3) by tagging and storing those pixels visibly different from those in the reference field; and (4) by displaying the real-time video with the substitution of those tagged and stored pixels which comprise the successive images of moving objects. Within the constraints of the television system itself and by utilizing controllable picture gating, Action Track has been successfully and effectively used in a variety of sports telecasts. For these applications it has provided the viewer with expanded visualization of motion and trajectory.
Publication Date: 1978-10-01
DOI: 10.5594/J16656
Link: https://doi.org/10.5594/J16656
Author(s): J. K. Moore, A. Kaiser, H. W. Mahler

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J. K. Moore, A. Kaiser, and H. W. Mahler; A Recent Innovation in Digital Special Effects, SMPTE Journal ( Volume: 87, Issue: 10, October 1978); SMPTE, 1978. Available at https://doi.org/10.5594/J16656

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J. K. Moore, A. Kaiser, and H. W. Mahler; A Recent Innovation in Digital Special Effects, SMPTE Journal ( Volume: 87, Issue: 10, October 1978); SMPTE, 1978. Available at https://doi.org/10.5594/J16656

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<span class="citation">J. K. Moore, A. Kaiser, and H. W. Mahler; <cite>A Recent Innovation in Digital Special Effects</cite>, SMPTE Journal ( Volume: 87, Issue: 10, October 1978); SMPTE, 1978. Available at <a href="https://doi.org/10.5594/J16656" target="_blank" rel="noopener">https://doi.org/10.5594/J16656</a></span>

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J. K. Moore, A. Kaiser, and H. W. Mahler; A Recent Innovation in Digital Special Effects, SMPTE Journal ( Volume: 87, Issue: 10, October 1978); SMPTE, 1978
doi: 10.5594/J16656
url: https://doi.org/10.5594/J16656

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<li>
J. K. Moore, A. Kaiser, and H. W. Mahler; <cite id="bib-10-5594-j16656">A Recent Innovation in Digital Special Effects</cite>, SMPTE Journal ( Volume: 87, Issue: 10, October 1978); SMPTE, 1978
<span class="doi">10.5594/J16656</span>
</li>