VisionHDP
™
and
VisionDVI
™
User Manual and Installer Guide
© 2004 - 2006 Lumagen
®
, Inc.
2
Rev 1.1
Lumagen
®
Video Processor
The primary function of the
VisionHDP, and VisionDVI,
is to act as a video switch,
process the selected video source, and output in the appropriate format and resolution.
Standard definition (SD), enhanced-definition (ED), or high-definition (HD) video inputs
are supported, in addition to a number of PC formats. Video inputs are converted to
progressive video (if needed) and are then scaled the video output resolution.
Interlaced video has been in use for more than 50 years and is still the most common
video format. It displays half of the lines of picture information each sixtieth (or fiftieth)
of a second. Each half of the image is called a field and displays either all the even lines,
or all the odd lines. So, an entire image, called a frame, takes a thirtieth (or twenty-fifth)
of a second to display on the screen. An “i” suffix on the resolution specification is used
to indicate interlaced formats.
In contrast, progressive video presents each frame as a whole. A “p” suffix on the
resolution specification is used to indicate progressive formats. Converting interlaced
video to progressive video is referred to as “deinterlacing.”
The Lumagen video processor is comprised of four major functional sections:
•
Input selection, conversion to digital (if needed), and video decoding
•
Deinterlacing
•
Filtering and scaling
•
Conversion to analog video, or output as digital DVI-D video.
These functional blocks are shown below.
Functional Block Diagram
DVI-D 1
DVI-D 2
YP
B
P
R
/RGB 3
YP
B
P
R
/RGB 4
Composite 5
Composite 6
SVideo 7
SVideo 8
(option) SDI 9
(option) SDI 0
Deinterlace
Filtering
and Scaling
Input
Select,
A-to-D,
and TV
Decoder
DVI-D
DVI-D
with
HDCP
RGB/
YP
B
P
R
Digital-to-
Analog
Conversion