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Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 2, February 1942)
[ACTIVE]

Design and Use of Noise-Reduction Bias Systems

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
The factors underlying the design and use of biased recording systems are described. In order to minimize noise and “shutter bump” special precautions in filtering must be taken. Suitable values for “attack” and “release” times are dependent upon the type of recording, margin settings, and reproducing conditions. Comparison of variable-density and variable-area requirements is made. Methods used in designing the rectifiers, filters, and other circuit details are given and the application to a new equipment known as the RA-1124 Noise-Reduction Unit is shown.
Publication Date
1942-02-01
DOI
10.5594/J09926
Link
https://doi.org/10.5594/J09926
Author(s)
R. R. Scoville, W. L. Bell
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J09926.json

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R. R. Scoville and W. L. Bell; Design and Use of Noise-Reduction Bias Systems, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 2, February 1942); SMPTE, 1942. Available at https://doi.org/10.5594/J09926
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R. R. Scoville and W. L. Bell; Design and Use of Noise-Reduction Bias Systems, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 2, February 1942); SMPTE, 1942. Available at https://doi.org/10.5594/J09926

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R. R. Scoville and W. L. Bell; Design and Use of Noise-Reduction Bias Systems, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 2, February 1942); SMPTE, 1942. Available at https://doi.org/10.5594/J09926
Snippet:
<span class="citation">R. R. Scoville and W. L. Bell; <cite>Design and Use of Noise-Reduction Bias Systems</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 2, February 1942); SMPTE, 1942. Available at <a href="https://doi.org/10.5594/J09926" target="_blank" rel="noopener">https://doi.org/10.5594/J09926</a></span>

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R. R. Scoville and W. L. Bell; Design and Use of Noise-Reduction Bias Systems, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 2, February 1942); SMPTE, 1942
doi: 10.5594/J09926
url: https://doi.org/10.5594/J09926
Snippet:
<li>
R. R. Scoville and W. L. Bell; <cite id="bib-10-5594-j09926">Design and Use of Noise-Reduction Bias Systems</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 2, February 1942); SMPTE, 1942
<span class="doi">10.5594/J09926</span>
</li>