What exactly is the difference between anamorphic and non-anamorphic video??

kurt_fire

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i've never quite known what exactly the difference is. can someone please explain what this means to me.
 

Allan Jayne

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The video content is intrinsically the same, 480 scan lines (rows of pixels) high by about 720 pixels wide.

The "anamorphic" video was shot or telecined based on a 16:9 video frame aspect ratio and therefore looks better when the raster on the picture tube is stretched to 16:9 while the "regular" video looks better when the raster is stretched to 4:3 (or the video including any pre-recorded black bar material on top and bottom spread out over a group of pixels encompassing the respective shape).

On DVD there are flags included with each video frame so a TV with the capability automatically goes into the proper aspect ratio, or the DVD player can if you wish reformat the video as 4:3. The TV cannot tell by analyzing or taking hints from the video content.

Video hints:
http://members.aol.com/ajaynejr/video.htm
 

Don_Berg

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Anamorphic DVD title has higher vertical resolution for the image since the image is stretched vertically to cover the 480 lines available in DVD format. Older non-anamorphic is letterboxed and the black bars are part of the 480 lines - its the same as letterboxed programs broadcast on regular TV channels. The DVD player when setup for a 4:3 display will letterbox (add black bars) itself to the output for anamorphic DVDs so the extra resolution is lost, but with it setup for a 16:9 display the full vertical resolution goes out.
 

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