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SMPTE Journal ( Volume: 97, Issue: 7, July 1988)
[ACTIVE]

Exploring and Exploiting Subchannels in the NTSC Spectrum

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPTE
Volume
97, No. 7, pp. 526–532
Abstract
When the NTSC spectrum is analyzed in three dimensions, regions of high spatiotemporal frequencies that have several important properties can be identified. First, these regions contain little energy for scenes of normal picture content. Second, they contain frequencies, such as those corresponding to moving diagonals, that are largely ignored by the human visual system. Third, they are not interpreted as normal color by most NTSC receivers. These properties allow the insertion of additional, possibly uncorrelated, video information into prefiltered “holes” or “subchannels” in the multidimensional spectrum. Ignored by the circuits of standard NTSC receivers and the eyes of their viewers, this extra information can be detected, removed, and displayed by special receivers. Exploiting subchannels in the NTSC spectrum can increase the amount of transmitted video information in a fully compatible manner. This article describes the location of the NTSC subchannels, and illustrates how they can be used in a typical application.
Publication Date
1988-07-01
DOI
10.5594/J02918
ISSN
Print: 0036-1682
Link
https://doi.org/10.5594/J02918
Author(s)
Michael A. IsnardiDavid Sarnoff Research Center, Subsidiary of SRI International. Princeton, NJ 08540.
Copyright
© 1988 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

  • Three-Dimensional Spectrum and Processing of Digital NTSC Color Signals [Active]
  • A Proposal for a New High-Definition NTSC Broadcast Protocol [Active]
  • Improved Television Systems: NTSC and Beyond [Active]
  • HDTV Compatible Transmission System [Active]
  • Cooperative Processing for Improved NTSC Chrominance/Luminance Separation [Active]
  • Psychophysics and the Improvement of Television Image Quality [Active]
  • Dubois E. , “The Sampling and Reconstruction of Time-Varying Imagery with Application in Video Systems,” Proc. IEEE. , 73 : 502 – 522 , April 1985 . EXTERNAL
  • Dudgeon D. E Mersereau R. M. , Multidimensional Digital Signal Processing , Prentice-Hall : Englewood Cliffs, NJ , 1984 . EXTERNAL
  • Isnardi M. A. . “Encoding for Compatibility and Recoverability in the ACTV System,” IEEE Trans. Broadcasting , BC-33 :116–123, Dec. 1987 . EXTERNAL
  • Isnardi M. A. Smith T. R. Roeder B. J. , “Decoding Issues in the ACTV System,” IEEE Trans. Consumer Electronics , 34 : 111 – 120 , Feb. 1988 . EXTERNAL
  • Isnardi M. A. , “Multidimensional Interpretation of NTSC Encoding and Decoding,” IEEE Trans. Consumer Electronics , 34 : 179 – 193 , Feb. 1988 . EXTERNAL
  • Tonge G. J. , “The Sampling of Television Images,” IBA Experimental and Development Report 112/81. EXTERNAL
  • 2. LoCicero J. L. . “A Compatible High-Definition Television System (SLSC) with Chrominance and Aspect Ratio Improvements,” SMPTE J. , 94 : 546–558, May 1985 . EXTERNAL
  • 3. Ninomiya Y. . “A Single Channel HDTV Broadcast System – the MUSE,” NHK Laboratories Note No. 304, Sept. 1984 . EXTERNAL
  • 4. Fukinuki T. . “Experiments on Proposed Extended-Definition TV with Full NTSC Compatibility,” SMPTE J. , 93 :923–929, Oct. 1984 . EXTERNAL
  • 6. Pearson D. E. , Transmission and Display of Pictorial Information , John Wiley & Sons : New York , 1975 . EXTERNAL
  • 8. Tsinberg M. Fisch E. , “A System for Artifact-Free NTSC Encoding and Decoding,” IEEE, CE-32228–226 , Aug. 1986 . EXTERNAL
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Michael A. Isnardi; Exploring and Exploiting Subchannels in the NTSC Spectrum, SMPTE Journal ( Volume: 97, Issue: 7, July 1988); SMPTE, 1988. Available at https://doi.org/10.5594/J02918
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Michael A. Isnardi; Exploring and Exploiting Subchannels in the NTSC Spectrum, SMPTE Journal ( Volume: 97, Issue: 7, July 1988); SMPTE, 1988. Available at https://doi.org/10.5594/J02918

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Michael A. Isnardi; Exploring and Exploiting Subchannels in the NTSC Spectrum, SMPTE Journal ( Volume: 97, Issue: 7, July 1988); SMPTE, 1988. Available at https://doi.org/10.5594/J02918
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<span class="citation">Michael A. Isnardi; <cite>Exploring and Exploiting Subchannels in the NTSC Spectrum</cite>, SMPTE Journal ( Volume: 97, Issue: 7, July 1988); SMPTE, 1988. Available at <a href="https://doi.org/10.5594/J02918" target="_blank" rel="noopener">https://doi.org/10.5594/J02918</a></span>

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Michael A. Isnardi; Exploring and Exploiting Subchannels in the NTSC Spectrum, SMPTE Journal ( Volume: 97, Issue: 7, July 1988); SMPTE, 1988
doi: 10.5594/J02918
url: https://doi.org/10.5594/J02918
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<li>
Michael A. Isnardi; <cite id="bib-10-5594-j02918">Exploring and Exploiting Subchannels in the NTSC Spectrum</cite>, SMPTE Journal ( Volume: 97, Issue: 7, July 1988); SMPTE, 1988
<span class="doi">10.5594/J02918</span>
</li>

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