Dvd aspect ratio – B&K Precision 1253 - Manual User Manual
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6: DVD Aspect Ratio
Description:
Grayscale rectangles occupying a user selected aspect ratio, on top of a black background.
The outer rectangle is at 75% gray, with an inner rectangle at 50% (mid) gray. The border of the outer
rectangle occupies 10% of the width and height of the rectangles. Through the center of this border is a
black line at 5%. This simulates the output of a DVD player generating an image area displayed by the
rectangles. The 10% border is 10% of the image width and height, and not of the screen width and height.
Variations:
Pressing the DVD Aspect Ratio button multiple times, sequences through the most popular
DVD aspect ratios (1.33:1, 1.78:1, 1.85:1, 2.35:1). These aspect ratios cover 87% of all movies recorded
to DVD media. Read Appendix E: DVD Aspect Ratios for particular movies.
Today's DVD players output one of the following formats:
720x480 60p (the newer progressive scan DVD), or
720x480 30i (regular NTSC DVD), or
720x576 25i (PAL DVD, in Europe).
Pattern Usage:
DVDs output several aspect ratios (width-to-height ratio), which is normally the aspect
ratio as seen in a theater, and is normally what is recorded onto film.
Many newer monitors detect the image aspect ratio coming in, from a DVD for example, and digitally
zoom for the best fit. A wide-screen (16:9) TV will display a 1.78 movie to fit the whole screen, a 1.33
movie will have black bands on the left and right, and a 1.85 or 2.35 movie will have black bands on the
top and bottom.
Make sure you see at least the black line around all sides of the screen, which allows up to 5% overscan
on the monitor. If not, you are zoomed in too much, in which case you may need to turn off the auto-fit
function on the TV.
Examples of Uncalibrated Displays:
The following image indicates a TV with too much horizontal
overscan. The left and right portions of the pattern are cut off. Check to see the auto-zoom function is
turned on, or if the zoom is manually adjustable then set it so the whole pattern is visible.
Too much left-right overscan