Before revision: The theater version of Dolby Digital Surround EX was introduced in 1999, when Dolby and Skywalker Sound , a division of Lucasfilm Ltd., co-developed Dolby Digital Surround EX™ for the release of Star Wars: Episode I – The Phantom Menace.
After revision: The theater version of Dolby Digital Surround EX was introduced in 1999, when Dolby and Lucasfilm THX , a division of Lucasfilm Ltd., co-developed Dolby Digital Surround EX™ for the release of Star Wars: Episode I – The Phantom Menace.