15
Basic Video Processing
Chapter 1 Overview
For details, see Chapter 3 “Signal Selection and
Transitions” (1 p. 44).
Keys
A key is an effect in which a part of the background image
is replaced by an image or superimposed text. The signal
determining how the background is cut out is termed “key
source,” and the signal that replaces the cut-out part is
termed “key fill.” The system component responsible for
processing a key is referred to as a “keyer.”
For the four keyers on each switcher bank, you can use the
following key types (i.e., methods of processing the key
source).
• Luminance key
• Linear key
• Color vector key
• Chroma key
• Key wipe pattern key
Key modifiers
You can apply borders and other modifiers to the edge of
the key image.
Masks
A mask allows a part of the image to be masked by the
background or a key. If unwanted holes occur in the
background, or if a key is not the desired shape, you can
correct the problem with a mask.
Resizer
This function allows you to apply effects, such as zoom,
movement, or aspect ratio change to a part of a created key.
You can use the following operations.
• Two-dimensional transform of a key
• Rotation of keys
• Resizer interpolation settings
• Resizer crop/border settings
• Resizer effect settings (mosaic, defocus)
For details, see Chapter 4 “Keys” (1 p. 62).
Resizer and key edge cannot be used on some keyers.
For details, 1 “Keyers that support resizer/key edge”
(p. 62).
Wipes
A wipe is a transition from the current video stream to a
new video stream, using a wipe pattern.
Changing the background by means of a wipe is referred to
as a “background wipe,” and inserting or deleting a key
with a wipe is termed a “key wipe.”
There are two types of wipe: those that can be selected in
a common transition, and those that can be selected in an
independent key transition.
You can also specify the wipe direction, or set the pattern
position, applying various changes and modifiers to the
selected wipe pattern.
For details, see Chapter 5 “Wipes” (1 p. 83).
DME Wipes
A DME wipe is a wipe transition that uses an image
transformation effect to change from one video image to
the next.
The patterns that can be used for a DME wipe are as
follows.
Slide, Squeeze, Door, Flip tumble, Frame in-out,
Picture-in-picture, Mosaic, and Defocus
You can also specify the wipe direction, or set the pattern
position, applying various changes and modifiers to the
selected DME wipe pattern.
Resizer DME wipes
Using the resizer, you can carry out key DME wipes.
For details, see Chapter 6 “DME Wipes” (1 p. 93).
Frame Memory
Frame memory is a function for using a still image or video
(frame memory clip) as material for editing.
You can create a still image by capturing a frame of input
video, or a clip by specifying a range of input video. The
created images and clips can be written to memory for
playback, editing, and output.
For details, see Chapter 7 “Frame Memory” (1 p. 102).
Color Backgrounds
This function can be used to obtain color background
video.
Two color signals generated from the dedicated generators
can be switched or mixed, and then output.
For details, see “Color Background” (1 p. 122) in
chapter 8.
Notes
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