SMPTE Journal ( Volume: 88, Issue: 7, July 1979)
[ACTIVE]
A Digital Telecine Processing Channel
Metadata
- Publisher
- SMPTE — White Plains, NY, USA
- Doc Type
- Journal Article
- Content Type
- Original Research
- Abbreviated Title
- J SMPTE
- Volume
- 88, No. 7, pp. 474–480
- Abstract
- Digital processing of signals has advantages of improved stability, accuracy, and reliability. There are two problems that might arise in a digital processing channel. One is that gamma correction increases the visibility of contouring due to quantizing in dark areas of the picture so that more than the usual eight bits per sample are needed. The other is that nonlinear processing in gamma correctors and clippers may give rise to beats causing coarse moire patterns on the output picture. A digital telecine processing channel was built to examine these problems. It incorporates a range-changing analog-to-digital converter which gives improved coding resolution for low level signals. The channel performs the operations of gamma correction, color masking, and aperture correction. A subjective test has shown that ten bits per sample are needed in the green channel when signals are digitally coded before gamma correction. The generation of moire patterns due to nonlinear processing has been shown not to be significant in practice.
- Publication Date
- 1979-07-01
- DOI
10.5594/J06638- ISSN
- Print:
0036-1682 - Link
- https://doi.org/10.5594/J06638
- Author(s)
- Andrew OliphantBBC Research Department, Kingswood Warren, Tadworth, Surrey KT20 6NP, England.Martin WestonBBC Research Department, Kingswood Warren, Tadworth, Surrey KT20 6NP, England.
- Copyright
- © 1979 Society of Motion Picture and Television Engineers, Inc.
Bibliographic Reference(s)
- 1. Weston M. , “Pulse Code Modulation of Video Signals; Visibility of Level Quantizing Effects in Processing Channels,” BBC Research Dept. Report, No. 1975 /31. EXTERNAL
- 2. Devereux V. G. , “Pulse Code Modulation of Video Signals: 8 Bit Coder and Decoder,” BBC Research Dept. Report, No. 1970 /25. EXTERNAL
- 3. Weston M. , “Digital Aperture Correction,” BBC Research Dept. Report, No. 1978 /10. EXTERNAL
- 4. “Method for the Subjective Assessment of the Quality of Television Pictures,” CCIR Recommendation 500 , 1974 . EXTERNAL
- 5. Devereux V. G. , “Pulse Code Modulation of Video Signals: Subjective Study of Coding Parameters,'’ BBC Research Dept. Report. No. 1971/40; or V. G. Devereux, “Application of P.C.M. to Broadcast Quality Video Signals,” Radio & Electronic Engineer, 44 : No. 7 , July 1974 . EXTERNAL
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Andrew Oliphant and Martin Weston; A Digital Telecine Processing Channel, SMPTE Journal ( Volume: 88, Issue: 7, July 1979); SMPTE, 1979. Available at https://doi.org/10.5594/J06638
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Andrew Oliphant and Martin Weston; A Digital Telecine Processing Channel, SMPTE Journal ( Volume: 88, Issue: 7, July 1979); SMPTE, 1979. Available at https://doi.org/10.5594/J06638
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Andrew Oliphant and Martin Weston; A Digital Telecine Processing Channel, SMPTE Journal ( Volume: 88, Issue: 7, July 1979); SMPTE, 1979. Available at https://doi.org/10.5594/J06638
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<span class="citation">Andrew Oliphant and Martin Weston; <cite>A Digital Telecine Processing Channel</cite>, SMPTE Journal ( Volume: 88, Issue: 7, July 1979); SMPTE, 1979. Available at <a href="https://doi.org/10.5594/J06638" target="_blank" rel="noopener">https://doi.org/10.5594/J06638</a></span>
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Andrew Oliphant and Martin Weston; A Digital Telecine Processing Channel, SMPTE Journal ( Volume: 88, Issue: 7, July 1979); SMPTE, 1979
doi: 10.5594/J06638
url: https://doi.org/10.5594/J06638
doi: 10.5594/J06638
url: https://doi.org/10.5594/J06638
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<li> Andrew Oliphant and Martin Weston; <cite id="bib-10-5594-j06638">A Digital Telecine Processing Channel</cite>, SMPTE Journal ( Volume: 88, Issue: 7, July 1979); SMPTE, 1979 <span class="doi">10.5594/J06638</span> </li>