Camera Interface - LG -A258 Service Manual

3. TECHNICAL BRIEF

3.15 Camera Interface

3.15.1 PMB8815 Camera Interface
The Camera Interface (CIF) represents a complete video and still picture input interface (see Figure 3.15.1).
The CIF contains image processing, scaling, and compression functions. The integrated image processing
unit supports image sensors with integrated YC C processing.
b r
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 C 4:2:2 JPEG compressed images should use the full sensor
b r
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.
Figure 3.15.1 Block Diagram of Camera Interface
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