12
Contrast Range
The HDW-750P/730S can handle a very wide contrast
range. A number of useful features are readily available to
aid the operator to more precisely reproduce any given
scene. Creative possibilities are offered by modifying “gamma
settings”, offering a great advantage to achieving a desired
‘look’.
Selectable Gamma Curves
A vital factor in achieving an appropriate contrast range
is the gamma curve. Gamma determines the transfer
characteristic of a normal exposed scene. For Sony’s
digital camcorders, gamma curves can be adjusted on
location. The overall (Master) gamma curve of the
HDW-750P/730S offers a very natural overall tonal repro-
duction because of the 10-bit A/D converter and ADSP
(Advanced Digital Signal Processing) providing multiple
gamma points. While the master gamma can be changed
between two calculating patterns, several fixed master
gamma curves are available for each pattern. These are all
accessible and interchangeable via the set-up menus.
Gamma Calculating Pattern A
No.1: SMPTE 240M (Initial Gain 4.0)
No.2: ITU-R.BT709 (Initial Gain 4.5)
No.3: BBC Gamma setting (Initial gain 5.0)
Gamma Calculating Pattern B
No.1: Sensitivity is equivalent to 50 ISO
No.2: Sensitivity is equivalent to 100 ISO
No.3: Sensitivity is equivalent to 200 ISO
RGB Gamma Balance
By changing the RGB gamma balance it is possible to
change the colour balance of the mid-tones without affect-
ing black or white balance.
Variable Black Gamma Range
The Variable Black Gamma Range function allows fine
adjustment of tonal reproduction in shadow areas. This
feature can help to bring out details from the dark parts of
the picture without affecting mid-tones while maintaining
absolute black level. The variable range is LOW, MID and HIGH.
Black Stretch
Adjustment of the Variable Black Gamma Range can be
limited to picture luminance only, without affecting other
parameters of the video signal. This is particularly helpful for
dark scenes when the black has to stay black, but there is
a requirement to pull out more detail.
Normal
Red Channel Enhancement
Normal
Variable Black Gamma Range Function ON
RGB Gamma Balance
Variable Black Gamma Range
