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Chapter 1 - Specifications 117
Presentation
THOMSON TTV1707 / CCU DT500
User manual
B1707M00LD
September 2000
Noise suppression on the horizontal and vertical contour signals is gain controlled. The
final contour correction level is reduced in the dark areas of the image to decrease noise
visibility. The system features a high amplitude detail compressor (“SOFT CONTOUR”).
• “DIAG CONTOUR” function which, by decreasing the amplitude of frequencies close
to the subcarrier, reduces the “CROSS COLOR” phenomena.
• “SKIN DETAIL” function which is used to reduce the detail level on any skin detail
chosen either manually or automatically by the operator.
• “DFZ” function. This is used to reduce or increase the detail level according to the zoom
position.
• “MASKING” correction enabling very accurate colorimetry and colour identity
adjustment for all cameras. Three matrix values may be stored enabling colorimetric
blending of the TTV1707 with other cameras while retaining the reference EBU matrix
values.
• “GAMMA” correction providing a very good rendering of lowly illuminated areas of
the image. Several gamma laws are proposed: Factory, Custom, BBC, CCIR. From a
given law, it is possible to modify the gamma corrections of the three primaries R, G
and B individually.
• “BLACK STRETCH” by modifying the gamma correction response, black stretch is
used to increase or decrease the black gain without affecting the remainder of the image.
• Automatic or manual white knee with colour restoration. This device is used to obtain
maximum exploitation of the complete contrast range restored by the sensors and 12-bit
analog-to-digital conversion.
• “ABL” function used to increase the contrast of some images (e.g.: in fog).
Triaxial link between the camera head and the Channel Control Unit.
This link carries the following signals: The 270 Mbit digital video, 2 return videos (one
optional), 1 intercom link, 1 “ambient mic” sound, the camera time base generator control
signal, the remote control forward and return signals and power to supply the camera.