ドルビーデジタル
The cinema version of "Dolby Digital EX" was introduced in 1999, when Dolby and Skywalker Sound, a division of Lucasfilm Ltd., codeveloped "Dolby Digital Surround EX"™ for the release of "". Dolby Digital Surround EX has since been used on the DVD releases of the "Star Wars" prequel and original trilogies.