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Section 1: Introduction
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Index
Contents
Overview of Terms
The terms below are commonly used when discussing DVEOUS.
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Channel—
The term “channel” has been used to describe either the video or
key processing path, inputs, or outputs (the video channel, or the key
channel output). Most DVE systems process luminance and chrominance in
the video path but only luminance in the key path. Usually, a “two-channel”
system or effect refers to the number of video images involved, and implies
that the key channels are included.
DVEOUS has the unique ability to process either a key signal or a video sig-
nal on the second channel. This means that the standard DVEOUS system
can have one video and one key path, or two video paths and no key path; it
can generate raster-shaped key signals at the output.
In this manual, “channel” can refer to a video path or a key path, and, unless
specifically noted, they are interchangeable. Each twin channel DVE board
has a main video channel (1A) and its “twin” video, key, or shadow channel
(1B). The second (optional) DVE board adds an additional video channel
(2A) and twin video, key, or shadow channel (2B).
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Multichannel—
”Multichannel systems” in the past always referred to the
video channels, with the accompanying key channels implied. Thus, a four-
channel system had four video paths and four key paths. DVEOUS is a
multichannel system in its standard configuration, because both channels
can process video. Each DVEOUS DVE board (maximum two per system)
has twin processor channels: the video channel (A) and the twin channel (B).
You can use these channels in three different modes:
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V + V (Video + Video)—
The DVE board independently processes two
video sources. All transform, warp, and lighting effects are adjustable sepa-
rately on each video channel. The DVE processor internally generates the
key signals associated with these signals. The key signals are full screen
“white” with adjustable opacity and edge softness.
•
V + K (Video + Key)—
The DVE board independently processes one
video and one key source. All transforms are available to the key signal
independently from the video. The key channel also has clip, gain, and
horizontal phase controls.
•
VK + S (Video/Key + Shadow)—
In this mode, the DVE board derives a
full-bandwidth drop shadow from the key input. It processes the video and
key (which are tied together) in the A channel, with independent control
of the shadow in the B channel. Besides the clip, gain, and horizontal
phase controls for the key part of the A channel, there are color and opac-
ity controls for the shadow channel.
