Philips EM5.2E Service Manual page 67

Circuit Descriptions, Abbreviation List, and IC Data Sheets
• Skin tone correction: The idea of Skin tone correction is
to correct UV components corresponding to skin towards
an "ideal" skin tone axis.
• Blue Stretch: This feature makes it possible to shift
colours near white towards more bluish coloured white.
• Green Enhancement: This feature makes it possible to
shift low saturated green colours towards more saturated
green colours.
• Colour Dependent Peaking (CDP): When using
luminance peaking, the viewer has the impression that the
colour performance is somewhat lower then in the picture
generated without the luminance peaking circuit. This
impression is normal because no action was done in the
colour channel to compensate for the change in the
luminance channel. Locally, at the edge position the
contrast has been increased without increase of the
saturation at this point. That is why the viewer perceives
less colour. To give the viewer the same colour impression
as on the original picture, a correction to the colour has to
be done at the same place where a change was made in
the luminance. This is CDP.
• Skin Tone Dependent Peaking (STDP): The horizontal
and vertical peaking can be reduced in skin tone areas to
avoid that people become too old. Attenuation can be
applied to both horizontal and vertical peaking.
EM5.2E AA 9. EN 91