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SMPTE Meetings and Conferences ( October 1996)
[ACTIVE]

Twelve Bit Acquisition, the Next Step in Digital Broadcast Cameras

Metadata

Publisher
SMPTE — White Plains, NY
Doc Type
Conference Paper
Content Type
Original Research
Volume
1996, No. 15, pp. 1–14
Abstract
CCD image sensors are capable of delivering at least 600% of linear video to the signal processing. This headroom is needed to reproduce large scene contrasts in a convincing way on displays not capable to handle these large contrasts. Today's cameras have 10 bit A/D conversion in the video path. This calls for some form of nonlinear analog processing like (pre-)gamma or (pre-)knee to handle these 600% signals. This weakens the well known arguments of better accuracy and stability for these digital cameras: non-linear circuits like knee, gamma and whiteshading multipliers are not the most accurate and stable analog circuits. The move to 12 bit A/D conversion in the camera allows digital videoprocessing with sufficient dynamic range, and all non-linear processing in the digital signal path. This also opens the way to reconsider processing, given the new possibilities of the digital domain. Examples will be given in the paper. Some items that will be addressed are: dynamic pixel correction, automatic skin contours and a new digital highlight compression with improved color fidelity. The architecture of a 12 bit camera, the Philips BTS LDK20P will be explained in the paper, together with the algorithms used.
Publication Date
1996-10-01
DOI
10.5594/M00112
Link
https://doi.org/10.5594/M00112
Author(s)
Jan van RooyPhilips Broadcast Television Systems Breda, The Netherlands
Rob VoetPhilips Broadcast Television Systems Breda, The Netherlands
Copyright
© 1996 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

  • 1 Sandbank C. P. (ed): ‘ Digital Television ’ John Wiley & Sons 1990 ISBN 0 471 92360 5. EXTERNAL
  • 2 van Rooy J. Botte B. : ‘ Requirements for digital signal processing in broadcast cameras ’ Symposium Record 19th International Television Symposium Montreux 1995 , p 212 – 218 . EXTERNAL
  • 3 Thorpe L. Takeuchi A. : The all digital camcorder SMPTE journal , january 1996 p18. EXTERNAL
  • 4 Blom H. . Adaptive highlight compression in today's CCD cameras” , SMPTE journal , march 1992 p135 . EXTERNAL
  • 5 Lacotte J. P. . “ Towards full quality CCD studio cameras: the last steps,” IBC conference 1988 . EXTERNAL
  • 6 CIE pub. nr 15.2, 1976 . EXTERNAL
  • 7 EBU tech 3237-E, 1983 . EXTERNAL
  • 8 Botte B. “ Digital automatic pixel correction in new generation CCD Broadcast cameras” IBC conference. 1992 p 474 . EXTERNAL
  • 9 Hurst Robert N. Independent fleshtone contours” US pat no. 4,506,293 ( 1984 ). EXTERNAL
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Jan van Rooy and Rob Voet; Twelve Bit Acquisition, the Next Step in Digital Broadcast Cameras, SMPTE Meetings and Conferences ( October 1996); SMPTE, 1996. Available at https://doi.org/10.5594/M00112
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Jan van Rooy and Rob Voet; Twelve Bit Acquisition, the Next Step in Digital Broadcast Cameras, SMPTE Meetings and Conferences ( October 1996); SMPTE, 1996. Available at https://doi.org/10.5594/M00112

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Jan van Rooy and Rob Voet; Twelve Bit Acquisition, the Next Step in Digital Broadcast Cameras, SMPTE Meetings and Conferences ( October 1996); SMPTE, 1996. Available at https://doi.org/10.5594/M00112
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<span class="citation">Jan van Rooy and Rob Voet; <cite>Twelve Bit Acquisition, the Next Step in Digital Broadcast Cameras</cite>, SMPTE Meetings and Conferences ( October 1996); SMPTE, 1996. Available at <a href="https://doi.org/10.5594/M00112" target="_blank" rel="noopener">https://doi.org/10.5594/M00112</a></span>

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Jan van Rooy and Rob Voet; Twelve Bit Acquisition, the Next Step in Digital Broadcast Cameras, SMPTE Meetings and Conferences ( October 1996); SMPTE, 1996
doi: 10.5594/M00112
url: https://doi.org/10.5594/M00112
Snippet:
<li>
Jan van Rooy and Rob Voet; <cite id="bib-10-5594-m00112">Twelve Bit Acquisition, the Next Step in Digital Broadcast Cameras</cite>, SMPTE Meetings and Conferences ( October 1996); SMPTE, 1996
<span class="doi">10.5594/M00112</span>
</li>