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In the video surveillance marketplace, the need for higher quality video, higher resolution, and more flexibility and features is driving the change from analog to digital cameras. By definition, High-Definition (HD) video must be digital, so the adoption of HD standards is symbiotic with the move to digital sensors. The higher frame rates and resolution supported by HD video standards require newer compression techniques, such as H.264, which in turn require greater processing power in the camera. The need to extract maximum image content in a wide range of lighting conditions (high and low light, high contrast) has led to digital cameras adopting a new class of WDR sensors, which require dynamic range compression within the camera, again in the digital domain.
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