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 — White Plains, NY, USA
- Doc Type
- Journal Article
- Content Type
- Original Research
- Abbreviated Title
- J SMPE
- Volume
- 38, No. 2, pp. 125–147
- 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- ISSN
- Print:
0097-5834 - Link
- https://doi.org/10.5594/J09926
- Author(s)
- R. R. ScovilleElectrical Research Products Division of Western Electric Co., Hollywood, Calif.W. L. BellElectrical Research Products Division of Western Electric Co., Hollywood, Calif.
- Copyright
- © 1942 Society of Motion Picture and Television Engineers, Inc.
Bibliographic Reference(s)
- 1 Frayne J. G. Silent H. C. : “Western Electric Noiseless Recording,” J. Soc. Mot. Pict. Eng. , XVIII (May, 1932 ), p. 551 . EXTERNAL
- 10 Hopper F. L. Manderfeld E. C. Scoville R. R. : “A Light-Weight Sound-Recording System,” J. Soc. Mot. Pict. Eng. , XXXIII (Oct., 1939 ), p. 449 . EXTERNAL
- 11 Pearson G. L. : “Thermistors, Their Characteristics and Uses,” Bell Laboratories Record , XIX (Dec., 1940 ), p. 106 . EXTERNAL
- 2 Kellogg E. W. : “Ground-Noise Reduction Systems,” J. Soc. Mot. Pict. Eng. , XXXVI (Feb., 1941 ), p. 137 . EXTERNAL
- 3 Frayne J. G. Silent H. C. : “Push-Pull Recording with the Light-Valve,” J. Soc. Mot. Pict. Eng. , XXXI (July, 1938 ), p. 46 . EXTERNAL
- 4 Daily C. R. Chambers I. M. : “Production and Release Applications of Fine-Grain Films for Variable-Density Sound Recording,” J. Soc. Mot. Pict. Eng. , XXXVIII (Jan., 1942 ), p. 45 . EXTERNAL
- 5 Dimmick G. L. Blaney A. C. : “A Direct Positive System of Sound Recording,” J. Soc. Mot. Pict. Eng. , XXXIII (Nov., 1939 ), p. 479 . EXTERNAL
- 6 Kellogg E. W. Phelps W. D. : “Time-Delay in Resistance-Capacity Circuits,” Electronics (Feb., 1937 ), p. 22 . EXTERNAL
- 7 Shea T. E. : “Transmission Networks and Wave-Filters,” D. Van Nostrand Co. ( 1929 ), pp. 221 – 291 . EXTERNAL
- 8 Scoville R. R. Frayne J. G. : “Analysis and Measurement of Distortion in Variable-Density Recording,” J. Soc. Mot. Pict. Eng. , XXXII (June, 1939 ), pp. 648 – 672 . EXTERNAL
- 9 Hopper F. L. Manderfeld E. C. Scoville R. R. : “A New High-Quality Film-Recording System,” J. Soc. Mot. Pict. Eng. , XXVIII (Feb., 1937 ), p. 191 . EXTERNAL
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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
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<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
doi: 10.5594/J09926
url: https://doi.org/10.5594/J09926
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<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>