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3. TECHNICAL BRIEF
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3.13 Camera Interface(2M Fixed Focus Camera)
3.13.1 PMB8810 Camera Interface
The Camera Interface (CIF) represents a complete video and still picture input interface (see Figure 3.13.1).
The CIF contains image processing, scaling, and compression functions. The integrated image processing
unit supports image sensors with integrated YC
b
C
r
processing.
Scaling is used for downsizing the sensor data for either displaying them on the LCD, or for generating
data streams for MPEG-4 compression. In general, YC
b
C
r
4:2:2 JPEG compressed images should use the full
sensor resolution, but they can also be downscaled to a lower resolution for smaller JPEG files. Scaling also
can be used for digital zoom effects, because the scalers are capable of up-scaling as well.
CIF all data is transmitted via the memory interface to an AHB bus system using a bus master interface.
Programming is done by register read/write transactions using an AHB slave interface.
3. TECHNICAL BRIEF
Figure 3.13.1 Block Diagram of Camera Interface