30
Video Composition Operations
Compositing Using DSK
This takes video composited upstream using PinP or the like, and performs further downstream compositing with text or images. Using DSK
(downstream keying), you can switch the background video while text or images remain displayed. This section describes operations when in the PGM/
DSK
NOTE
5
When the setting for sending the input-channel signal to the AUX
bus is in effect, DSK cannot be used. Change the signal sent to the
AUX bus to something other than the input channel (p. 17).
5
When the setting to use an external key is in effect, DSK cannot be
used. Select the [MENU] button
g
“Key”
g
change “Mode” to “Self
Key” (p. 29).
Setting the Key Type and Extraction Color
To change the key type and extraction color to match the video you
want to composite.
1.
Select the [MENU] button
g
“DSK”
g
“Type.”
2.
Use the [VALUE] knob to specify the key type (extraction
color) to use when compositing.
Value
Explanation
Luminance 1 (White) This uses a brightness threshold to make white
transparent.
Luminance 2 (Black)
This uses a brightness threshold to make black
transparent.
Chroma 1 (Blue)
This uses a color threshold to make blue transparent.
Chroma 2 (Green)
This uses a color threshold to make green transparent.
3.
Press the [MENU] button to quit the menu.
MEMO
When the key type is chroma key (“Chroma 1 (Blue)” or “Chroma 2
(Green)”), you can use the DSK menu to fine-tune the key color.
Menu item Explanation
Hue
You use the following items to adjust the hue of the key color.
Fine
This adjusts the center position for hue.
Width
This adjusts the hue width (range).
Saturation This adjusts the saturation of the key color.
Compositing Using DSK
1.
Input the logo or image.
By factory default, the settings are such that text and image input on
channel 8 are used in DSK composition.
When you want to use text or image on another channel, use the
[MENU] button
g
“DSK”
g
“Source Channel” to change the channel.
2.
Output the background video.
At the PVW section of the multi-view monitor, check the video to be
made the background.
3.
Press the DSK [PVW] button to turn on the preview output
(lighted).
The DSK [PVW] button lights up in green, and a preview of the
composition results is displayed in the PVW section of the multi-view
monitor.
At this stage, the final output has not yet been changed.
4.
Turn the DSK [LEVEL] or [GAIN] knob to adjust the degree of
effect applied.
DSK [LEVEL] knob
This adjusts the degree of extraction (transparency) for the key.
DSK [GAIN] knob
This adjusts the degree of edge blur (semi-transmissive region) for the
key.
5.
Press the [DSK] button to turn on DSK composition (lighted).
The [DSK] button lights up in red, and the text or image is composited
and the results are output.
6.
To turn off DSK compositing, press the [DSK] button a
second time.
The [DSK] button goes dark and the text and images disappear from
the output.
MEMO
The video transition-time setting is applied as the fade time for
DSK-composited text and image.
