Lumagen VisionHDQ - Manual (Page 5)

VisionHDQ ™
User Manual and Installer Guide
© 2004-2007 Lumagen®, Inc. 2 Rev 1.14
VisionHDQ™ Video Processor
The function of the VisionHDQ is to act as a video switch, then process the selected video source
and finally output it in the appropriate format and resolution. Standard definition (SD), enhanced-
definition (ED), or high-definition (HD) video inputs are all supported in addition to a number of
PC formats. Video inputs are converted to progressive video (if needed) and are then scaled to
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 VisionHDQ is comprised of four major functional sections:
• Input selection with conversion to digital (if needed) and video decoding
• Deinterlacing
• Filtering and scaling
• Output with conversion to analog video or output as digital DVI-D video.
These functional blocks are shown below.
VisionHDQ Functional Block Diagram
Composite and SVideo inputs automatically select between NTSC, PAL and SECAM formats. The
component, RGB and DVI-D inputs accept SD, ED and HD video at either 50 or 59.94 Hertz.
HDCP encryption is supported for the DVI-D inputs. If the signal is encrypted, the DVI-D inputs
are decrypted, processed, scaled and then re-encrypted for output as DVI-D. This is not just a
“pass-through” function.
SDI 0
DVI-I 1
DVI-I 2
DVI-I 3
DVI-I 4
YP
B
P
R
5
YP
B
P
R
6
Vid 7
SVideo 8
SVideo 9
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