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SMPTE Journal ( Volume: 64, Issue: 12, December 1955)
[ACTIVE]

Television Vertical Aperture Compensation

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
SMPTE J
Volume
64, No. 12, pp. 660–670
Abstract
The known ways of compensating in the vertical direction for a scanning aperture are reviewed. A new method is presented. This consists of wobbling the scanning aperture in and out of focus at a rapid rate, yielding high- and low-resolution signals. The low-resolution signal is subtracted from the high-resolution signal, yielding an aperture-compensated, or edge-enhanced, picture independent of the scanning direction. A similar method using vertical deflection wobble rather than focus wobble results in vertical aperture compensation alone. Pictures are shown to illustrate the subjective improvements obtainable using vertical aperture compensation.
Publication Date
1955-12-01
DOI
10.5594/J13989
ISSN
Print: 0898-0438
Link
https://doi.org/10.5594/J13989
Author(s)
A. C. SchroederRCA Laboratories Div., Radio Corp. of America, Princeton, N.J.
W. G. GibsonRCA Laboratories Div., Radio Corp. of America, Princeton, N.J.
Copyright
© 1955 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

  • Electrical and Photographic Compensation in Television Film Reproduction [Active]
  • 1. Dennison R. C. , “Aperture compensation for television cameras,” RCA RIB. , vol. 14 ; Dec. 1953 . EXTERNAL
  • 10. Unpublished work of Kell R. D. Gibson W. G. Schroeder A. C. . EXTERNAL
  • 11. Rose A. Weimer P. K. Law H. B. , “The image orthicon—a sensitive television pick-up tube,” Proc. IRE , vol. 34 ; July 1946 . EXTERNAL
  • 12. Wheeler H. A. Loughren A. V. , “The fine structure of television images,” Proc. IRE , vol. 26 ; May 1938 . EXTERNAL
  • 13. Gabor D. , “Communication theory and cybernetics,” IRE Trans. — Circuit Theory ; Dec. 1954 . EXTERNAL
  • 2. Kell R. D. Bedford A. V. Freden-Dall G. L. , “A determination of optimum number of lines in a television system,” RCA Rev. , vol. 5 ; July 1940 . EXTERNAL
  • 3. Baldwin M. W. , “The subjective sharpness of simulated television images,” Proc. IRE , vol. 28 ; Oct. 1940 . EXTERNAL
  • 4. Schade O. H. , “Electro-optical characteristics of television systems,” in four parts, RCA Rev. , vol. 9 ; 1948 . See also : O. H. Schade, “Image gradation, graininess and sharpness in television and motion-picture systems,” Jour. SMPTE , in four installments to date: Feb. 1951, Mar. 1952, Aug. 1953 and Nov. 1955. EXTERNAL
  • 5. Kallmann H. E. , “Transversal filters,” Proc. IRE , vol. 28 ; July 1940 . EXTERNAL
  • 6. Bedford A. V. , patent pending, assigned to RCA. EXTERNAL
  • 7. Discussions with J. W. Wentworth, Radio Corp. of America, Camden, N.J. EXTERNAL
  • 8. Kovasznay L. S. G. Joseph H. M. , “Image processing,” Proc. IRE , vol. 43 ; May 1955 . EXTERNAL
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A. C. Schroeder and W. G. Gibson; Television Vertical Aperture Compensation, SMPTE Journal ( Volume: 64, Issue: 12, December 1955); SMPTE, 1955. Available at https://doi.org/10.5594/J13989
Snippet:
A. C. Schroeder and W. G. Gibson; Television Vertical Aperture Compensation, SMPTE Journal ( Volume: 64, Issue: 12, December 1955); SMPTE, 1955. Available at https://doi.org/10.5594/J13989

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A. C. Schroeder and W. G. Gibson; Television Vertical Aperture Compensation, SMPTE Journal ( Volume: 64, Issue: 12, December 1955); SMPTE, 1955. Available at https://doi.org/10.5594/J13989
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<span class="citation">A. C. Schroeder and W. G. Gibson; <cite>Television Vertical Aperture Compensation</cite>, SMPTE Journal ( Volume: 64, Issue: 12, December 1955); SMPTE, 1955. Available at <a href="https://doi.org/10.5594/J13989" target="_blank" rel="noopener">https://doi.org/10.5594/J13989</a></span>

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A. C. Schroeder and W. G. Gibson; Television Vertical Aperture Compensation, SMPTE Journal ( Volume: 64, Issue: 12, December 1955); SMPTE, 1955
doi: 10.5594/J13989
url: https://doi.org/10.5594/J13989
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A. C. Schroeder and W. G. Gibson; <cite id="bib-10-5594-j13989">Television Vertical Aperture Compensation</cite>, SMPTE Journal ( Volume: 64, Issue: 12, December 1955); SMPTE, 1955
<span class="doi">10.5594/J13989</span>
</li>

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