Single-chip color imaging for UHDTV camera with a 33M-pixel CMOS image sensor
2011
To develop an ultrahigh-definition television (UHDTV) camera-with a resolution 16 times higher than that of HDTV
resolution and a frame rate of 60 Hz (progressive)-a compact and high-mobility UHDTV camera using a 33M-pixel
CMOS image sensor to provide single-chip color imaging was developed. The sensor has a Bayer color-filter array
(CFA), and its output signal format is compatible with the conventional UHDTV camera that uses four 8M-pixel image
sensors. The theoretical MTF characteristics of the single-chip camera and a conventional four-8M-pixel CMOS camera
were first calculated. A new technique for Bayer CFA demosaicing used for the single-chip UHDTV camera was then
evaluated. Finally, a pick-up system for single-chip imaging with a 33M-pixel color CMOS image sensor was
measured. The measurement results show that the resolution of this is equivalent to or surpasses that of the conventional
four-8M-pixel CMOS camera. The possibility of a practical compact UHDTV camera that makes use of single-chip
color imaging was thereby confirmed.
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