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SMPTE Journal ( Volume: 88, Issue: 6, June 1979)
[ACTIVE]

Optical Television Link Employing a Digitally Modulated Laser

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPTE
Volume
88, No. 6, pp. 414–420
Abstract
An experimental, through-the-air, digital television link is described. It can carry one NTSC color television picture signal and two high quality sound signals across a distance of 1 km in clear air. The television signal is PCM encoded at 3Fsc = 10.7 MHz, 8 bits/sample. The audio signals are PCM encoded at 31.5 kHz, 14 bits/sample. A new serial digital code called “reverse alternating codeword, non-return to zero” (RAC-NRZ) is described. It consists of complementing every other codeword during the conversion of the video and audio to a serial bit stream. The optical television link employs a gallium aluminum arsenide injection laser at the transmitter and an avalanche photodiode at the receiver. The link is essentially transparent to the PCM encoded signal and it produces excellent quality picture and sound whenever operating above threshold.
Publication Date
1979-06-01
DOI
10.5594/J06660
ISSN
Print: 0036-1682
Link
https://doi.org/10.5594/J06660
Author(s)
A. A. GoldbergCBS Technology Center, 227 High Ridge Road, Stamford, CT 06905.
S. JuchnowyczCBS Technology Center, 227 High Ridge Road, Stamford, CT 06905.
J. RossiCBS Technology Center, 227 High Ridge Road, Stamford, CT 06905.
Copyright
© 1979 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

  • PCM NTSC Television Characteristics [Active]
  • The Silicon-Target Vidicon [Active]
  • Reports of the Engineering and Standardization Committee Activities [Active]
  • PCM Encoded NTSC Color Television Subjective Tests [Active]
  • 1. Pratt Wik , Laser Communications Systems , John Wiley & Sons , 1969 , p. 128 . EXTERNAL
  • 11. Infrared Miniviewer , Model 7210, Electrophysics Corp. , 48 Spruce St., Nutley, NJ . EXTERNAL
  • 2. Elion G. R. Elion H. A. , Fiber Optics in Communications Systems , Marcel Dekker Inc. , 1978 , p. 124 . EXTERNAL
  • 6. Federal Register , V. 40 : No. 1218 , Part II. EXTERNAL
  • 7. “Guide for Submission of Information on Lasers and Products Containing Lasers Pursuant to 21 CFR 1002.10 and 1002.12,” July 1976 , Bureau of Radiological Health , Rockville, Md . EXTERNAL
  • 8. “Quality Control Practices for Compliance with Federal Laser Product,” HEW Publ. (FDA) 76–8036, March 1976 . EXTERNAL
  • 9. “Tabulated Values of Acceptable Emission Limits for Laser Products,” HEW Publ. 76–8029, March 1976 . EXTERNAL
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A. A. Goldberg, S. Juchnowycz, and J. Rossi; Optical Television Link Employing a Digitally Modulated Laser, SMPTE Journal ( Volume: 88, Issue: 6, June 1979); SMPTE, 1979. Available at https://doi.org/10.5594/J06660
Snippet:
A. A. Goldberg, S. Juchnowycz, and J. Rossi; Optical Television Link Employing a Digitally Modulated Laser, SMPTE Journal ( Volume: 88, Issue: 6, June 1979); SMPTE, 1979. Available at https://doi.org/10.5594/J06660

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A. A. Goldberg, S. Juchnowycz, and J. Rossi; Optical Television Link Employing a Digitally Modulated Laser, SMPTE Journal ( Volume: 88, Issue: 6, June 1979); SMPTE, 1979. Available at https://doi.org/10.5594/J06660
Snippet:
<span class="citation">A. A. Goldberg, S. Juchnowycz, and J. Rossi; <cite>Optical Television Link Employing a Digitally Modulated Laser</cite>, SMPTE Journal ( Volume: 88, Issue: 6, June 1979); SMPTE, 1979. Available at <a href="https://doi.org/10.5594/J06660" target="_blank" rel="noopener">https://doi.org/10.5594/J06660</a></span>

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A. A. Goldberg, S. Juchnowycz, and J. Rossi; Optical Television Link Employing a Digitally Modulated Laser, SMPTE Journal ( Volume: 88, Issue: 6, June 1979); SMPTE, 1979
doi: 10.5594/J06660
url: https://doi.org/10.5594/J06660
Snippet:
<li>
A. A. Goldberg, S. Juchnowycz, and J. Rossi; <cite id="bib-10-5594-j06660">Optical Television Link Employing a Digitally Modulated Laser</cite>, SMPTE Journal ( Volume: 88, Issue: 6, June 1979); SMPTE, 1979
<span class="doi">10.5594/J06660</span>
</li>