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Originally Posted by Domingo
So what is Blue Ray compared to HD? What's the quality gap?
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So far, the biggest difference between the two formats (besides capacity) is the video compression codecs that are being used. The first wave of HD-DVDs are using the more efficient VC-1 format (essentially Windows Media 9 HD), while Blu-ray is using the older, less efficient but more proven MPEG 2 (same codec as DVD, but at higher data rates).
Although it's too early to say for sure, some early comparisons between the Toshiba HD-DVD player and Samsung Blu-ray player imply that HD-DVD might have a slight edge in picture quality. This may be because all of the first Blu-ray movies are single layer only (25 GB), so they are being recorded at lower than optimal data rates. Because HD-DVD is being released on dual-layer discs (30 GB) and VC-1 is more efficient, data rate isn't as much of a problem.
The good news for Blu-ray is that dual layer (50 GB) discs should be out by the end of summer, and the Blu-ray players themselves all support playback of VC-1 and H.264 codecs. When/if studios start using them, Blu-ray has the potential to have the best picture quality of either format, especially for really long movies with lots of extras. There's been no announcement of a "triple-layer" disc from HD-DVD, so the current dual-layer (30 GB) capacity is likely to be the maximum that will be available for that format. This means longer or more feature-rich releases may have to be put on two discs.