Journal of the Society of Motion Picture Engineers (1930-1949)

Record Details:

Title:
Journal of the Society of Motion Picture Engineers
Date:
1930-1949
Publisher:
New York, N.Y. : The Society
Volume:
Journal of the Society of Motion Picture Engineers
Leaf #:
000115
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
The Journal of the Society of Motion Picture Engineers (SMPE)Êdocuments the technological progress of the film industry, highlighting technical developments in production and exhibition. Of special interest are articles about special effects, theater practices, lighting, and the introduction of the 16mm format. Initially titled "Transactions of the Journal of the Society of Motion Picture Engineers."Digitized by the Prelinger Library and the Library of Congress Motion Picture, Broadcasting and Recorded Sound Division.
Date Added:
July 19, 2022
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tive variable-density recording. This is done by making the amplifier linear over the corresponding linear filmtransmission range and then nonlinear in the direction necessary to correct the film curvature in the high transmission range. The maximum volume output has been increased by approximately 6 db. Figure 4 shows a typical overall negative-positive exposure versus transmission curve, and illustrates the distortion that occurs when attempting to use the full transmission range of the film. Figure 4 also shows how by distorting the input signal a sine-wave result can be produced that extends over the transmission range from 5 to 80%. M-G-M has used the direct-positive system described in this paper for several months experimentally to make temporary recordings for previews and in other intrastudio operations. The sound quality has proved to be invariably satisfactory indicating that this method of transferring from magnetic originals to direct-positive density is quite feasible. 106 August 1952 Journal of the SMPTE Vol. 59