Journal of the SMPTE ( Volume: 81, Issue: 1, January 1972)
[ACTIVE]
Automatic Centering Unit for the Registration of a Three-Tube Color Television Camera
Metadata
- Publisher
- SMPTE — White Plains, NY, USA
- Doc Type
- Journal Article
- Content Type
- Original Research
- Abbreviated Title
- J SMPTE
- Volume
- 81, No. 1, pp. 4–13
- Abstract
- Precise centering of the several images of a color television camera is difficult to maintain for long periods. A digital system is described which detects and corrects the centering errors from the video signals of normal scenes. In this system the video is converted to short pulses representing high-level, sharp edges of objects and the horizontal centering errors are then detected by comparing these pulses for relative time differences. Vertical errors are detected by a similar system which operates from line to line on signals recreated from the pulses by line-strobing. These signals contain vertical errors only. High-quality integrating stores are used to extract the average corrective powers from the error signals. The dc voltages thus obtained are then used to modify the appropriate centering control voltages.
- Publication Date
- 1972-01-01
- DOI
10.5594/J05667- ISSN
- Print:
0361-4573 - Link
- https://doi.org/10.5594/J05667
- Author(s)
- A. W. CritchleyEMI Electronics Ltd., Television Equipment Div., Blyth Rd., Hayes, Middlesex, England.
- Copyright
- © 1972 Society of Motion Picture and Television Engineers, Inc.
Bibliographic Reference(s)
- Features of a New Three-Tube Color Television Camera [Active]
- Automatic Registration of Color Television Cameras [Active]
- 2. Taylor R. J. , “Improvements relating to automatic signal registration,” Brit. Patent Appl. No. 61127/69. EXTERNAL
- 3. Taylor R. J. , “Improvements relating to automatic signal registration,” Brit. Patent Appl. No. 2141/70. EXTERNAL
- 4. Critchley A. W. , “Apparatus for the automatic registration of signals,” Brit. Patent Appl. No. 29808/71. EXTERNAL
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A. W. Critchley; Automatic Centering Unit for the Registration of a Three-Tube Color Television Camera, Journal of the SMPTE ( Volume: 81, Issue: 1, January 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J05667
Snippet:
A. W. Critchley; Automatic Centering Unit for the Registration of a Three-Tube Color Television Camera, Journal of the SMPTE ( Volume: 81, Issue: 1, January 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J05667
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A. W. Critchley; Automatic Centering Unit for the Registration of a Three-Tube Color Television Camera, Journal of the SMPTE ( Volume: 81, Issue: 1, January 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J05667
Snippet:
<span class="citation">A. W. Critchley; <cite>Automatic Centering Unit for the Registration of a Three-Tube Color Television Camera</cite>, Journal of the SMPTE ( Volume: 81, Issue: 1, January 1972); SMPTE, 1972. Available at <a href="https://doi.org/10.5594/J05667" target="_blank" rel="noopener">https://doi.org/10.5594/J05667</a></span>
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A. W. Critchley; Automatic Centering Unit for the Registration of a Three-Tube Color Television Camera, Journal of the SMPTE ( Volume: 81, Issue: 1, January 1972); SMPTE, 1972
doi: 10.5594/J05667
url: https://doi.org/10.5594/J05667
doi: 10.5594/J05667
url: https://doi.org/10.5594/J05667
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<li> A. W. Critchley; <cite id="bib-10-5594-j05667">Automatic Centering Unit for the Registration of a Three-Tube Color Television Camera</cite>, Journal of the SMPTE ( Volume: 81, Issue: 1, January 1972); SMPTE, 1972 <span class="doi">10.5594/J05667</span> </li>