Selecting The Gamma; Using The Standard Gamma; Using Hypergamma - Sony SRW-9000 Operation Manual

Selecting the Gamma

In addition to the built-in standard gamma and
HyperGamma curves, you can create and use
your own user gamma tables.
Use the <GAMMA> page of the Camera >USER
(PAINT) menu to turn gamma correction on and
off and to select gamma curves.
<GAMMA> page
You can also select the gamma on the gamma
table selection page (see page 52) of the
subdisplay.

Using HyperGamma

Hyper Gamma enables the wide dynamic range of the CCD sensors to be reproduced with smooth contrast
without using the Knee function.
This camera provides the following eight hyper gamma choices:
Available Hyper Gamma choices
No. a)
Name
1 HG3250G36
2 HG4600G30
3 HG3259G40
4 HG4609G33
5 HG8000G36
6 HG8000G30
7 HG8009G40
8 HG8009G33
a) Naming rule: HG + 3 digits of dynamic range value +
1's digit of white limit + G + video output value with
18% gray card
For the respective curves, see the figures in
"HyperGamma curves" (page 74).
Dynamic range White limit
325% 100%
460% 100%
325% 109%
460% 109%
800% 100%
800% 100%
800% 109%
800% 109%

Using the Standard Gamma

Standard gamma provides video gamma curves
intended mainly for the creation of broadcast
content. It is used in combination with the Knee
function, which adjusts the dynamic range of
high-luminance areas.
When STANDARD is selected on the first line of
TABLE on the <GAMMA> page, you can select
from among the following standard gamma
curves on the second line.
Gamma Gamma curve
table No.
1 Equivalent to SD ENG camcorder
2 Equivalent to 4.5-times gain
3 Equivalent to 3.5-times gain
4 Equivalent to SMPTE-240M
5 Equivalent to ITU-R709
6 Equivalent to 5.0-times gain
7 Equivalent to 5.0-times-709 gain
The No. 5 (ITU-R709) curve is recommended for
normal use.
Note that ITU-R709 provides 4.5-times gain near
black. Select the No. 6 (×5.0) curve when you
need higher contrast near black.
Video output with 18% gray card
(video input 20%)
36%
30%
40%
33%
36%
30%
40%
33%
Reproducibility of high luminance areas
You can select the dynamic range from among
325%, 460%, and 800%. Selecting a wide
dynamic range, such as 800%, enables
reproduction of gradation at high luminance.
Selecting the Gamma 73