Lumagen VisionDVI & VisionHDP - Manual (Page 5)

VisionHDP ™
User Manual and Installer Guide
© 2004-2007 Lumagen®, Inc. 2 Rev 1.14
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.
VisionHDP Functional Block Diagram
Deinterlace
Filtering
and Scaling
Input
Selection
A-to-D
and
TV
Decoder
DVI-D
DVI-D
with
HDCP
Digital-to-
Analog
Conversion
RGB/
YP
B
P
R
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