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Standard Displays
When watching a standard (1.37:1) film on a
standard (1.33:1) display, we can see virtually the
full image without adjustments. Again, the film is
presented in the same way as it would be in a movie
theater.
However if we watch a widescreen (1.85:1) film, we
have a new problem. The picture will be distorted as
the wide image is squeezed to fit the standard
display.
Again, this distorted image is unacceptable. A few
high-quality standard video displays will allow for
the vertical size of the picture to be decreased,
restoring the proper image geometry. But since
nearly all standard displays lack any type of “Aspect
Ratio” control, this capability is instead built into
all DVD players.
By selecting “4:3 (Letterbox)” for the “TV Screen”
setting in the on-screen setup menus (see page 53),
when a widescreen disc is played the player will
automatically squeeze the image vertically to restore
the correct geometry while adding black bars at the
top and bottom.
Additional Factors
So far everything has been relatively straightforward.
However, there are a few more cases to consider that
introduce some complexity to the situation.
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