You won't get such a DR with such a pixel pitch on a stills sensor (without multiple exposure artifacts), global shutter or not. Physically impossible with the current technology.
On a video sensor, interleaving the ISOs of the adjacent video frames, it's possible. But no "shutter speeds with flash", of course.
That makes sense! The paper did mention that the with HDR procedure, motion blur might occur, stating that it is useful for "static and slow moving objects"
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