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Old February 13 2012, 04:02 AM   #441
Fleet Captain
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Location: Berlin, Germany
Re: The OFFICIAL STNG Next Level Bluray watch and review thread

That's because on DVD Video, the "full image" is actually inherently 4:3, either 720x576 pixels (PAL) or 720x480 (NTSC). 16:9 modes are specified as well, but tend to go unused: Widescreen material is saved in 4:3 as well, exploiting the greater vertical resolution this affords, and un-stretched during playback - this technique is referred to as anamorphic.

The Blu-Ray spec, OTOH, doesn't specify a 4:3 HD mode. It supports the same 4:3 SD modes as DVD does, but if you want to store a HD image, you have to use a 16:9 aspect ratio. Thus they had no choice but to encode the black bars into the image.
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