Standardized Audio Response from Magnetically Striped Motion-Picture Films

Metadata

Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Volume: 78, No. 6, pp. 435–456
Abstract: Test films are essential to permit simplified measurement of signal level and frequency response in magnetic recording so that the industry can conveniently achieve interchangeability of program material. For all film and tape formats, calibration of a test film requires that first a reference reproducer be established and calibrated over the audio spectrum of interest, and second that the test film be examined with this standardized reproducer. There is no other known procedure for calibrating multi-frequency magnetic test films of sufficient relevance, reliability, and reproducibility. The extensive literature on magnetic recording/-reproducing theory is reviewed to justify the details of reference reproducer calibration, and to emphasize that the magnetic film systems incorporate some parameters which have not previously been recognized in the calibration of magnetic tape systems. The theoretical basis for a recommended super-8 characteristic is presented. By reference to this broader review of the magnetic theory, intercomparisons of the U.S. and international standards for both film and tape are presented. We have used the most probable interpretations of these documents (in the absence of a precise exposition of the intent of most committees), from whence it is apparent there is a frequent need for either clarification or revision.
Publication Date: 1969-06-01
DOI: 10.5594/J09039
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J09039
Author(s): W. K. GrimwoodKodak Research Laboratories
F. J. Kolb
D. L. Carr
Details: need to add references
Copyright: © 1969 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

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High-speed magnetic sound transfer to 8mm films EXTERNAL
The establishment of magnetic recording characteristics at low audio frequencies EXTERNAL
“Magnetic recording: playback system calibration by absolute means,” EXTERNAL
Higher speed duplication of eight-track tapes with enhanced dynamic range EXTERNAL
Recording and calibration of super-8 reproducer test films EXTERNAL
The case against low-frequency pre-emphasis in magnetic recording EXTERNAL
Tape reproducer response measurements with a reproducer test tape EXTERNAL
Absolute flux and frequency response characteristics in magnetic recording: Measurements, definitions, and standardization EXTERNAL
A list of published standards related to magnetic sound recording EXTERNAL
Selected topics in Solid State Physics EXTERNAL
Reproducer test tapes: Evolution and manufacture EXTERNAL
Specification: Standard Electrical Characteristics for Two-Way Reproducing Systems in Theaters EXTERNAL
Report of the basic sound committee on pre- and post-equalization EXTERNAL
Magnetic recording standards quarterly progress report EXTERNAL
Multiple speed tape duplicating EXTERNAL
Some notes on problems encountered in the use of the standard reference tape EXTERNAL
Determination of the frequency-response curve of sound tape magnetization EXTERNAL
Absolute measurement of signal strength on magnetic recordings; phase II EXTERNAL
Absolute measurement of signal strength of magnetic recordings EXTERNAL
orphan/10.5594-J09039/ref-bib-32 EXTERNAL
The reproduction of magnetically recorded signals EXTERNAL
Studies on magnetic recording EXTERNAL

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W. K. Grimwood, F. J. Kolb, and D. L. Carr; Standardized Audio Response from Magnetically Striped Motion-Picture Films, Journal of the SMPTE ( Volume: 78, Issue: 6, June 1969); SMPTE, 1969. Available at https://doi.org/10.5594/J09039

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W. K. Grimwood, F. J. Kolb, and D. L. Carr; Standardized Audio Response from Magnetically Striped Motion-Picture Films, Journal of the SMPTE ( Volume: 78, Issue: 6, June 1969); SMPTE, 1969. Available at https://doi.org/10.5594/J09039

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<span class="citation">W. K. Grimwood, F. J. Kolb, and D. L. Carr; <cite>Standardized Audio Response from Magnetically Striped Motion-Picture Films</cite>, Journal of the SMPTE ( Volume: 78, Issue: 6, June 1969); SMPTE, 1969. Available at <a href="https://doi.org/10.5594/J09039" target="_blank" rel="noopener">https://doi.org/10.5594/J09039</a></span>

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W. K. Grimwood, F. J. Kolb, and D. L. Carr; <cite id="bib-10-5594-j09039">Standardized Audio Response from Magnetically Striped Motion-Picture Films</cite>, Journal of the SMPTE ( Volume: 78, Issue: 6, June 1969); SMPTE, 1969
<span class="doi">10.5594/J09039</span>
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Referenced By

A New Look at 70mm Sound: Proposed Revisions of Magnetic Sound Tracks for Theatrical Release Prints [Active]
Flux and Flux-Frequency Measurements and Standardization in Magnetic Recording [Active]
Recording and Calibration of Super-8 Magnetic Reproducer Test Films [Active]
The Standardization of the Super-8 System [Active]
Audio Performance of Magnetic Prestriped Super-8 Motion-Picture Films [Active]
Standards and Recommended Practices [Active]
Frequency Response for 16mm Magnetic Sound: A Survey of Test Films [Active]
SMPTE RP 45:1972 [Active, Stabilized]