An Improved System for Theatrical Reproduction of 35mm Optical Sound

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: Modern advances in magnetic recording and microphone technology are employed nowadays in the sound-recording process in film production. Original recordings often contain information up to 15 kHz. The final optical track commonly goes up to 9 or 10 kHz. Recorded sound quality is better than it appears to be when judged by listening tests in commercial theaters, due to the use of the Academy curve for playback. A technique based on “dynamic noise reduction circuitry” is described. The bandwidth of the standard optical soundtrack is extended up to 10 kHz in reproduction, without objectionable film noise. Also introduced is a dynamic high-frequency energy limiter. As an option, the monaural signal can be processed into a stereophonic signal pair, adding “depth effect.” In motion-picture-production use the channel available is expanded by an additional octave, providing better reproduction. There is no compatibility problem, and old prints can be reproduced with improved quality.
Publication Date: 1972-12-01
DOI: 10.5594/J08184
Link: https://doi.org/10.5594/J08184
Author(s): Robert Orban, John Delantoni

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Robert Orban and John Delantoni; An Improved System for Theatrical Reproduction of 35mm Optical Sound, Journal of the SMPTE ( Volume: 81, Issue: 12, December 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J08184

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Robert Orban and John Delantoni; An Improved System for Theatrical Reproduction of 35mm Optical Sound, Journal of the SMPTE ( Volume: 81, Issue: 12, December 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J08184

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<span class="citation">Robert Orban and John Delantoni; <cite>An Improved System for Theatrical Reproduction of 35mm Optical Sound</cite>, Journal of the SMPTE ( Volume: 81, Issue: 12, December 1972); SMPTE, 1972. Available at <a href="https://doi.org/10.5594/J08184" target="_blank" rel="noopener">https://doi.org/10.5594/J08184</a></span>

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Robert Orban and John Delantoni; An Improved System for Theatrical Reproduction of 35mm Optical Sound, Journal of the SMPTE ( Volume: 81, Issue: 12, December 1972); SMPTE, 1972
doi: 10.5594/J08184
url: https://doi.org/10.5594/J08184

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Robert Orban and John Delantoni; <cite id="bib-10-5594-j08184">An Improved System for Theatrical Reproduction of 35mm Optical Sound</cite>, Journal of the SMPTE ( Volume: 81, Issue: 12, December 1972); SMPTE, 1972
<span class="doi">10.5594/J08184</span>
</li>