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High-quality, low-power colour image sensor pipeline for under $20

February 23, 2011 | Julien Happich | 222901649
ChipWrights released a new colour pipeline solution for cameras using non-System-on-Chip (SoC) sensors based on ChipWrights’ CW5631 SoC. The solution requires a CW5631 SoC and a DDR2 DRAM; it can be employed in tandem with a second CW5631 SoC, which can be used as a system processor or as a stand-alone image sensor pipeline in existing camera designs.

The chip has 16-bit streaming input and output ports, which can be configured for BT.601 or BT.656 operation. The image pipeline is implemented in software that runs on ChipWrights’ proprietary DSP and can be as complex or simple as required.  The pipeline inputs raw sensor data in Bayer format and outputs the image as YUV422i.

ChipWrights will release the colour pipeline’s source code to qualified customers. The baseline release includes bad pixel interpolation, auto-white balance and auto-exposure calculation, black level clip, lens shading correction, update statistics, bayer interpolation, colour transform to sRGB , white clamp, gamma LUT, convert to YUV422i and an image enhancement library.

The CW5631 SoC offers the flexibility and computational power to implement a wide variety of options including programmable timing generators for Horizontal and Vertical Sync timing and an I2C Master to configure and control the image sensor.  In a typical application the device consumes about 350 mW.

Visit ChipWrights at www.chipwrights.com










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