A Blue Ray is a disc like dvd's, but has more information materail within the disc than a normal dvd. That's why you have 1080P resolution on the picture rather than 720 or lower. The picture quality you see on bigger screen (46" and up) are more in detail, to transfer the picture from the Blue ray player to your 1080P you much use an HDMI cable. - From Yahoo! Answer作者: andy927 时间: 2011-12-29 22:52:31
Blue ray is just better in coding, it can go up to 10gb, thus better picture quality.