Ultra High-Definition TV (hereinafter referred to as "UHDTV"), featuring 33 megapixels with 22.2 multichannel sound, adds a new sense of reality to TV programs. We are currently developing new video equipment for a UHDTV system, enabling us to shoot and record immersive scenes for sports, nature and art coverage for UHDTV program production. NHK's UHDTV system, generates images with 16 times the spatial sampling of current HDTV, consists of 4layers (G1, G2, B, R) of the Gch diagonal pixel offset structure and each layer is 3840×2160. A new, compact down converter exclusive to UHDTV program production converts 8K (7680×4320) images to 4K (3840×2160) or HDTV images; it's also equipped with an HDTV image cut-out function, a color correction function, and an energy-saving function. Because a second-dimension digital filter process is applied for converting Dual Green UHDTV signals to UHDTV signals, it can excerpt high quality HDTV images smoothly from arbitrary UHDTV images on a live feed, which make a single source effectively multipurpose. This converter is expected to be used for HDTV sport programs such as football games, to pick up specific players from UHDTV images. New lenses are also being developed for UHDTV cameras. New wide-angle and portable zoom lens have been specifically designed for UHDTV imaging. The view field of the wide lens is 100 degrees, the angle at which the sensation of reality becomes saturated. Zoom ratio is 10:1 (18 - 180mm focal range), while the maximum focal length is triple that of existing lenses and the resolutional power at the center is more than 250 line pairs per millimeter (LP/mm). In addition, a compact camera and recording and playback equipment for UHDTV have been developed. This report provides a UHDTV video equipment development, starting with a consideration of the signal processing of the down converter, and the lenses.
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