Grass Valley 4300 Krystal Reference Manual v.3.1 - Manual (Page 202)

9-8 Krystal 4300 Reference
Section 9 — Key/Stencil Menu
Coring Menu
The Coring menu provides tools to force the video to black when lumi-
nance falls below a specified level. This is useful in eliminating noise near
black level which may be a problem when keying.
Press the CORING> button located in the Key/Stencil top menu to bring up the
following menu:
The following Soft Button function is used with this menu when the CORING
mode is ON :
CORING AREA — coring choices include:
KEY cores only those areas outside the active key region (where video is
assumed invalid).
ALL cores the entire picture.
The soft knob used with this menu is:
CORING LEVEL — sets the coring threshold below which the video is
forced to black. This parameter is given in IRE units, where 7.5 corre-
sponds to black and 100 to white.
Displayed:
Register:
Keyframe:
Cur.Time: FRONT SIDE
Video: 1
Key:
1
Mask: 0
back side
Video: 1
Key:
1
Mask: 0
Near Far
OFF
ON
ALL
KEY
OFF
CORING CORING
AREA
CORING
CORING LEVEL
7.5000