AJA D5D - Manual (Page 3)

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3 AJA D5D NTSC/PAL To Serial Decoder User Manual — Introduction
Introduction
The D5D Serial Digital Decoder provides low-cost all-digital decoding of analog
NTSC, PAL or Y/C (S-Video) to 4:2:2 component serial digital. When working in a
serial digital environment, the D5D is useful for bringing in video from time-base
corrected analog composite equipment.
The D5D provides three 4:2:2 component serial digital outputs. The D5D
automatically configures NTSC (525 line) or PAL (625 line) analog inputs to 525 or
625 line 4:2:2 component serial digital outputs. To reduce jitter in the serial digital
outputs, the D5D uses a crystal PLL jitter filter.
The D5D decodes the full dynamic range of input video—values below black and
above white are not clipped. In the NTSC mode, the removal of the 7.5 IRE pedestal
can be disabled by external dip switch selection.
Requirements
The D5D requires a Time Base Corrected (TBC) source. Operation from VTR's,
laser disks, or other devices without TBCs is not recommended.
Features
• Analog Composite-Y/C to SDI Conversion
• Selectable 2 or 3 Line Adaptive Comb Filter
• Three SDI Outputs
• All SDI outputs are separately buffered
• Crystal PLL Jitter Filter
• Automatically Configures to NTSC/PAL
• Configurable pedestal
• External DIP switch user interface for configuration
Block Diagram
D5D Serial Digital Decoder, Block Diagram
Composite
or
Y/C Video
In
Inputs must
be
time-corrected
PLL
Jitter
Filter
DIP
Switch
User
Interface
for
Feature
Selection
A/D
Converter
Comb
Filter
Serial Video Out 1
Serial Video Out 2
Serial Video Out 3