Blu-ray and HD DVD are similar in technology. Both use a blue laser to read the information on the disc.

蓝光影碟机和高清数字影碟机采用了相似的技术，都用蓝色雷射光读取影碟上的信息。

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Until now, Vudu has only been available through consumer electronics products, like TVs, Blue-ray DVD plays and video game consoles, that carried Vudu.

FORBES: Vudu Moves to the Internet