System Coding Parameters, Mechanics and Electromechanics of the Reflective Videodisc Player

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 86, No. 2, pp. 74–79
Abstract: The choice of a coding system for an optical videodisc system is determined by the recording process, the optical stylus, the associated servo systems, and the disc properties. The videodisc system described employs a master disc that is prepared by modulating a laser beam with video and audio information to expose a photosensitive surface on the disc; after processing, minute pits of varying length are produced in a spiral pattern on the disc — rather like the continuous pattern of an ordinary phonograph record but without grooves. Pressing copies from the master also follows the phonograph record analogy. The pit side of a disc is covered with a highly reflective metallic coating and an additional protective coating; the video and audio information is read by a focused laser beam from the other side of the disc, through the transparent material of the disc. The control mechanisms necessary for operation are discussed, and it is shown that a 30-min high-quality television program with two separate sound channels can be compressed to a 30-cm-diameter disc format while allowing adequate tolerances for all aspects of the signal processing.
Publication Date: 1977-02-01
DOI: 10.5594/J13239
ISSN: Print: 0036-1682
Link: https://doi.org/10.5594/J13239
Author(s): P. W. BögelsN. V. Philips Glocilampenfabrieken, VLP Lab, SYY-3, Eindhoven, The Netherlands
Copyright: © 1977 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

Optics of Reflective Videodisc Players [Active]
The Philips ‘VLP’ System [Active]
Signal Processing in the Philips ‘VLP’ System [Active]
A Random Access System Adapted for the Optical Videodisc: Its Impact on Information Retrieval [Active]
5. Kenney G. , “Signal Processing for a Video Disc System (VLP),” IEEE Trans. B'cast & TV Rrs. Vol. BTR 20 , No. 3 , Aug. 1974 . EXTERNAL

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P. W. Bögels; System Coding Parameters, Mechanics and Electromechanics of the Reflective Videodisc Player, SMPTE Journal ( Volume: 86, Issue: 2, February 1977); SMPTE, 1977. Available at https://doi.org/10.5594/J13239

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P. W. Bögels; System Coding Parameters, Mechanics and Electromechanics of the Reflective Videodisc Player, SMPTE Journal ( Volume: 86, Issue: 2, February 1977); SMPTE, 1977. Available at https://doi.org/10.5594/J13239

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<span class="citation">P. W. Bögels; <cite>System Coding Parameters, Mechanics and Electromechanics of the Reflective Videodisc Player</cite>, SMPTE Journal ( Volume: 86, Issue: 2, February 1977); SMPTE, 1977. Available at <a href="https://doi.org/10.5594/J13239" target="_blank" rel="noopener">https://doi.org/10.5594/J13239</a></span>

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P. W. Bögels; System Coding Parameters, Mechanics and Electromechanics of the Reflective Videodisc Player, SMPTE Journal ( Volume: 86, Issue: 2, February 1977); SMPTE, 1977
doi: 10.5594/J13239
url: https://doi.org/10.5594/J13239

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<li>
P. W. Bögels; <cite id="bib-10-5594-j13239">System Coding Parameters, Mechanics and Electromechanics of the Reflective Videodisc Player</cite>, SMPTE Journal ( Volume: 86, Issue: 2, February 1977); SMPTE, 1977
<span class="doi">10.5594/J13239</span>
</li>