[Home]Pixel Aspect Ratio

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Note that video captured by standard-definition digital camcorders is 720 pixels wide but has a PAR of 10:11, giving a display aspect ratio of a little bit wider than 4:3. This has to be taken into account when converting DV to DVD or other formats.

See also aspect ratio.

Pixel aspect ratio (PAR) is the ratio of the width to height of a single pixel in a video frame, as opposed to the entire frame. A 1:1 PAR indicates square pixels, common on PC displays.

The pixel aspect ratio of a video stream can be computed from the display aspect ratio (usually 4:3 or 16:9) and the frame width and height. For example, a DVD 4:3 video stream encoded at 720x480 would have a PAR of (4*480):(3*720), or 8:9; the same stream encoded at 704x480 would have a PAR of 10:11.

Note that video captured by standard-definition digital camcorders is 720 pixels wide but has a PAR of 10:11, giving a display aspect ratio of a little bit wider than 4:3. This has to be taken into account when converting DV to DVD or other formats.

See also aspect ratio.


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Last edited May 1, 2006 6:30 pm by Achurch (diff)
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