Chapter 1. System Overview
HS 2000 System Administrator’s Handbook
10
Hardware overview
VGA board
The VGA board is a PCI-type graphics adapter with 2 megabytes of
RAM. The VGA board is cabled to the video board, where video and
VGA graphics are merged.
Video board
The video board (and optional daughterboard) is used with the codec
board and a compatible VGA board. The video board performs these
functions:
■
Px64 video decoding
■
VGA scan conversion
■
chroma-key merging of VGA and live video
The video daughterboard includes an additional video input and video
output to enable the use of dual monitors.
Codec board
The codec board (and audio daughterboard) is a PCI board
that incorporates a video codec, an audio subsystem, a communications
protocol, and a framing processor. The codec board includes a video input
and performs Px64 video encoding.
The codec board also incorporates a communications processor for
transmission of digital audio/video to various system resources, including
the network adapter. The audio daughterboard includes two audio inputs
and two line-level audio inputs, and performs digital audio compression/
decompression and acoustic echo cancellation.
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