DVDO iScan Pro Progressive Scan Display Interface - Manual (Page 18)

Silicon Image, Inc. iScan Pro User Manual
18
Figure 3: System Block Diagram
Video Processing
All of the processing steps in the signal chain between your video source and the display influence
the quality of the image.
The following are brief descriptions of the series of steps shown in Figure 3.
1. A signal is generated by a source (DVD player, Laser Disc, VCR, Cable Box, DSS Receiver…)
2. The signal is converted from analog to digital.
3. The digital video signal is decoded from NTSC composite or S-Video (Y/C) to its basic components
of Y, Cr and Cb.
4. The component signal is converted from interlace to progressive by the SiI503 chip.
5. The progressive signal is converted back to analog RGB or YPbPr and sent over a cable to the
display.
The iScan Pro processes steps 2, 3, 4, and 5, but the final quality of the displayed image depends
both on the quality of the source and the display device.
Video
Source
Decoding
NTSC to
Component
Deinterlacing
I to P
SiI503
Chip
(DV103)
Display
or
Projector
Analog to
Digital
Conversion
Digital to
Analog
Conversion