Accom ASWR8150, Техническое руководство

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DVE Board (Option)
Overview
The optional DVE board provides frame-based, 10-bit video processing.
This processing includes image sizing, positioning, rotation, warps, light
sourcing, textures, and drop shadows. One of the unique features of the
8150 DVE option is its flexible channel configuration. The board comes
with two channels: one main channel dedicated for video, and a second
channel that can be used for video, key, or shadow. The A video
transformation path is a full bandwidth video channel. The B channel
can process key signals (luminance only), but is also a full bandwidth
video channel. This lets the DVE board operate in three modes:
Video/Video Mode
In the Video/Video mode, the DVE board acts as two identical
video-only DVE channels, each processing a full 4:2:2 video path. Each
channel has a video input and a texture source input with dedicated
freeze buffers. The texture inputs feed each channel’s light source model,
where the textures are applied to the light source calculations. The video
inputs feed the border/crop processing, then pass to their respective
light source models. Then the light source, including texture, is applied
to each image.
Each channel has its own independent transform controller, which
generates addressing for the main transform framestore and filter
coefficients for the horizontal and vertical bandwidth filters. The video
for each channel is filtered and then passed to the motion detection and
vertical upsampling circuitry. From here the video is written into the
main transform framestores.
Figure 4-4 The DVE Board in Video/Video Mode
8150 Technical Guide Signal Chassis
9100-0212-04 - May 2000
System Overview
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