Constant-height display systems adjust a front-projected image so that no resolution is wasted on creating black bars above and below the picture when showing super-widescreen movies. For instance, when you go from watching an HDTV program with a 16:9 aspect ratio to a movie with a 2.35:1 ratio, the system fills the entire screen instead of adding bars to compensate for the wider image. To do this, it has to maintain a constant image height — and thus, its somewhat unwieldy name.
“An engineer explained to us that hundreds of ear impressions were gathered in the name of research, and while each one obviously boasted its own unique shape and size, one single characteristic remained uniform across the board: the entrance into the ear canal is not a perfect circle, it's an oval.”
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Constant-height display systems adjust a front-projected image so that no resolution is wasted on creating black bars above and below the picture when showing super-widescreen movies. For instance, when you go from watching an HDTV program with a 16:9 aspect ratio to a movie with a 2.35:1 ratio, the system fills the entire screen instead of adding bars to compensate for the wider image. To do this, it has to maintain a constant image height — and thus, its somewhat unwieldy name.