Results tagged “reference” from Final Cut Studio, Avid, Adobe, and Video Streaming

What are pixel aspect ratios?

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pixel-aspect-ratios.pngWhy do your graphic supers have funny jagged edges in Photoshop, but they look fine on (television) screen?  For that matter, how can anamorphic formats cram so much width into a regular NTSC-type signal?  The answer, simply put, is that pixels come in all shapes and sizes.

Recall that pixels are the individual points of color that make up a picture on your screen.  While computer screens and similar displays usually use pixels that are square, televisions, historically, have not.  In fact, the concept of a "pixel" didn't figure into analog television signals at all -- the NTSC specification called for 480 "lines," but the signal within those lines did not specify discrete units of width.

When the notion of digital video became a reality, the standards bodies that be decided that -- for both NTSC and PAL -- there would be exactly 720 pixels per line.  Thus, the 480i resolutions we know and love: 720x480 NTSC, and 720x576 PAL.

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